Yesterday, the results were out: the Wenzhou city environmental management office 8 "dig shit jobs" jobs a total of 1102 students register.
Back in the day of the recruitment announcement, "After the '80 recruiting Wenzhou institutions' students'
7 inch TFT LCD Monitor
dig dung workers'" became the topic of online friends lips. Have supported, have opposed, is more a sigh, "that students are working hard to find, harder to find the iron rice bowl."
Dig is not shit, is prepared
Why do college students clamoring "dig shit work?" User "kaiwen620" quipped, "Brother dig is not shit, is the cause of the preparation."
According to Director of Wenzhou City Sanitation Department, Le Cao Hui introduced bills this 8 "dig shit work" job really is the official cause of the preparation of the annual income of 20,000 yuan to 30,000 yuan.
It is directed at the cause of the establishment, with the job "professional limited" number of applicants remains high. Likewise, the recruitment of 10 waste disposal unit work, enrollment reached 2568 people.
Cutting workers need a college education dung?
The move of "dig shit jobs7 inch LCD Monitors
" What specifically do? Xu Cao Yue in detail, "is the most primitive kind of excreta disposal."
Main
To work two, one pull truck, and second, tumbrils entourage. "Pull night soil collection vehicle, and every day to night soil collection vehicle pulled by hand, door to door to collect feces, 4:00 should work together. Tumbrils entourage is doing manual labor, to 5-10 m long carrying a The pipeline leads to the septic tank, the suction stool. "
Also in some of the old city of Wenzhou, every day more than 2,000 old-fashioned toilet just waiting to 7 inch Monitors"dig shit workers" to fall.
So hard, not any technical content of the work conditions in the column is clearly written application to a college education, and is "after 80."
Students may not be competent
So many applicants, Xu Cao Yue think there might be college students do not know how hard stool handling. "This is not only physical, but also the nerve to have a high ideological level 才行.7 inch LCD Monitor" He advised students must think about not directed at the cause of the establishment, the blind candidates.
Last year, two students were recruited to be sent when tumbrils entourage. The results are back skin tube fixed, only for a relatively easy task.
To avoid a similar situation, all through the written test, you must first six months of experience, "dig shit work" life. If you can not adapt, can give interviews to retire. Experience during the month will be given 800 yuan of compensation
বুধবার, ২৩ জুন, ২০১০
When the young man to fight rural areas used in starting an online shop on the momentum
You may not remember guo the middle head, general appearance look like the young in rural areas of Hebei, but you will certainly refined his handing me over to see two hot foil stamping card printing.
"A cost of 10 cards, this is my marketing." The 32-year-old rural youth sly smile, told reporters, "I printed business cards to the top of the guy eating - Taobao shop."
Tens of millions of crude sales
Qinghe County, Hebei Xingtai car high in the Village, I stopped. Roadside Sahuan children and the elderly leisure tell you this is a common sight in rural areas north, water stains covered with dust and dirt road, jump up out of the big dogs, the same color of red brick houses
TFT Monitor
, it seems the same here as in other villages boring lethargy.
The first village is 5-guo houses, the ten-year-old boy on the school no standing in the room, lying on the ground clutter to shoes and other debris. If there is no business license posted on the wall and the court house 67 units humming computer, his home village, also with no difference other families. Even so, to see his business card on the "cool Meijiao Qinghe Cashmere Products Co., Ltd general manager" in the name of the first, the reporter or the suspiciously over his face and looked into his eyes. 67 young men busily typing on the computer side, the computer often pass out Taobao tingle. This is his network from a nearby village attracted customer service. Handwriting on the wall close to the company rules and regulations, "No on QQ, happy network, Internet reading novels, watching movies," trance, the reporters that are in white-collar workers gathered in the Scriptorium.
Although small, guo is fully utilized. Concubine are customer service centers, logistics packaging centers, warehouses, small-scale processing plant, a large bed in the bedroom is the General Manager's Office.
Seen alone in front of LCD flat Panel Monitoryou can not imagine that this is an annual sales of more than 1000 million, more than 20 million on profits of companies. The company selling things, just cashmere line.
More people can not imagine that the East Village has become known far and high the "Online Shop Village", 400 village households, there are more than 300 families have opened in Taobao Online Shop, with annual sales of 100 more than 20 million yuan. In 2009, the East Village through the completion of high sales reached more than 300 tons of cashmere lines, sales of more than 2,000 yuan, sales area nationwide.
Qinghe County, while not producing goats, but with the country's largest cashmere industry, the East Village, most households are engaged in high cashmere production and processing. 90 years from the last century, the village initiated the development of deep processing of cashmere, and gradually formed the county's largest cashmere line of professional village, but due to marketing difficulties, the production of cashmere line once stagnant.
The Road to Online Shop
Grew up in the East Village of guo high cashmere line from the sale started, though not rich, every year there are 34 million in revenue. In early 2008, in a friend's introduction, he first contacts, as the village the first person in line to sell yarn. The first person to eat crab courage has paid off, the first month, he earned 4,000 yuan.
"I have a detour." Guo frankly, just getting on Online Shop, the anxious "to big business", they have managed acting by, in order to earn the reputation and praise, to and fro to their sale, was finally found in Taobao severely punished him.
"Now my store is no reason to return. As long as the customer would like to retire, there must be reasons for his return, I never asked." Guo said. This also allows him to Taobao's reputation quickly moving, when he dreamed of a diamond's reputation has already achieved, shops honor two straight crown.
The power of examples is endless, make money guo been invited to guide the villagers around, a computer, a network cable, the old cashmere yarn industry is now linked to the influx of e-commerce most.
Guo Liu Lianguo cousin is coming out of the apprentice, and now his online shop also has entered the track, he took the camera to the yarn side of the camera, while using computer graphic. Two years ago are still living in poverty this year, he intends to buy a Buick sedan.
Online Shop Every village has its own name, has its own trademark, but the goods are mostly from the surrounding several large plant-guo apprentice starved to death are not afraid of the church master it?
"I burned from the money." Guo said he already has accumulated Taobao Taobao advertising platform more than a dozen million to train the cast, the highest one-day ad costs more than 8000, at least over 2000. "The village is only my vote affordable." "Starting an online shop out to explore the unique skills of many I have left hand." Guo smugly told reporters, "This is a trade secret, we can not say."
By the end of 2008, tasted the sweetness of-guo is not completely stopped the traditional channels of business profits, wholeheartedly Taobao shop franchise. Now, he invested three million yuan in the new plant will be completed.
E-commerce in rural road
CMC director of Qinghe Cashmere Products Market Sunlian Ling told reporters that 37 million people throughout the Qing, the personnel directly involved in cashmere industry, there are 8 million people, now Qinghe County resident deposits exceeded 8.0 billion, most of the cashmere industry, are created.
He introduced, Shop this industryLCD flat Monitor is people spontaneously bring about employment with 20,000, now the annual sales of 3 billion yuan Online Shop.
Taobao release of the latest employment index, as of April 30, 2010, has 106 million people shop on Taobao achieved through employment. According to global consultancy IDC estimates, each person in employment in the online shop, would bring 2.85 related industries jobs. That is, in theory Taobao has created the industry chain 302 million jobs. If you add in Tencent's "pat", Baidu's "has ah on the" business number, this number will be even greater.
The development of a network filling the information gap between urban and rural areas, coupled with smooth logistics, Online Shop in the rural areas do no such city high warehouse rent, starting Online Shop to money to make more.
The same is true fact, some villages have special products have been successfully made through the completion of poverty to wealth.
According to reports, Suining, Jiangsu Shuyang and rural areas, respectively, flowers and furniture online shop LCD Panelrelying on business, many villagers drove the car.
E-commerce experts, the Chinese Academy of Social Sciences Research Center of the Secretary-General Jiang Qiping information told reporters that the biggest difference between rural and urban areas is the low level of socialization. Circulation of agricultural products in the middle of much friction, it is farmers have to face the short board. Farmers with the network, after the opening of the Online Shop, there will be a low-cost social network, has to train the market to avoid excessive transaction costs, to solve the most difficult problems of farmers.
Jiang Qiping said the networkPanel once and farmers combine to produce benefits far greater than other groups, farmers were more likely than other networks.
"Now farmers are selling the network characteristics of differentiated products, are the best selling, most scarce product, which is conducive to market quickly." Jiang Qiping said the future direction of development is on orders. Farmers find customers before production, production docking sales, without intermediate links, zero transaction costs, then "what agricultural products can be sold online."
Local governments and a number of preferential agricultural organizations such as the ATM stations to guide farmers, training of farmers, some of the villagers take the lead in the effectiveness Monitorof preaching more effective than direct just like the East Village's high-guo.
Online Shop brought to the village of the biggest changes is what? Guo scratched his head, Bie has a "no fight."
"A cost of 10 cards, this is my marketing." The 32-year-old rural youth sly smile, told reporters, "I printed business cards to the top of the guy eating - Taobao shop."
Tens of millions of crude sales
Qinghe County, Hebei Xingtai car high in the Village, I stopped. Roadside Sahuan children and the elderly leisure tell you this is a common sight in rural areas north, water stains covered with dust and dirt road, jump up out of the big dogs, the same color of red brick houses
TFT Monitor
, it seems the same here as in other villages boring lethargy.
The first village is 5-guo houses, the ten-year-old boy on the school no standing in the room, lying on the ground clutter to shoes and other debris. If there is no business license posted on the wall and the court house 67 units humming computer, his home village, also with no difference other families. Even so, to see his business card on the "cool Meijiao Qinghe Cashmere Products Co., Ltd general manager" in the name of the first, the reporter or the suspiciously over his face and looked into his eyes. 67 young men busily typing on the computer side, the computer often pass out Taobao tingle. This is his network from a nearby village attracted customer service. Handwriting on the wall close to the company rules and regulations, "No on QQ, happy network, Internet reading novels, watching movies," trance, the reporters that are in white-collar workers gathered in the Scriptorium.
Although small, guo is fully utilized. Concubine are customer service centers, logistics packaging centers, warehouses, small-scale processing plant, a large bed in the bedroom is the General Manager's Office.
Seen alone in front of LCD flat Panel Monitoryou can not imagine that this is an annual sales of more than 1000 million, more than 20 million on profits of companies. The company selling things, just cashmere line.
More people can not imagine that the East Village has become known far and high the "Online Shop Village", 400 village households, there are more than 300 families have opened in Taobao Online Shop, with annual sales of 100 more than 20 million yuan. In 2009, the East Village through the completion of high sales reached more than 300 tons of cashmere lines, sales of more than 2,000 yuan, sales area nationwide.
Qinghe County, while not producing goats, but with the country's largest cashmere industry, the East Village, most households are engaged in high cashmere production and processing. 90 years from the last century, the village initiated the development of deep processing of cashmere, and gradually formed the county's largest cashmere line of professional village, but due to marketing difficulties, the production of cashmere line once stagnant.
The Road to Online Shop
Grew up in the East Village of guo high cashmere line from the sale started, though not rich, every year there are 34 million in revenue. In early 2008, in a friend's introduction, he first contacts, as the village the first person in line to sell yarn. The first person to eat crab courage has paid off, the first month, he earned 4,000 yuan.
"I have a detour." Guo frankly, just getting on Online Shop, the anxious "to big business", they have managed acting by, in order to earn the reputation and praise, to and fro to their sale, was finally found in Taobao severely punished him.
"Now my store is no reason to return. As long as the customer would like to retire, there must be reasons for his return, I never asked." Guo said. This also allows him to Taobao's reputation quickly moving, when he dreamed of a diamond's reputation has already achieved, shops honor two straight crown.
The power of examples is endless, make money guo been invited to guide the villagers around, a computer, a network cable, the old cashmere yarn industry is now linked to the influx of e-commerce most.
Guo Liu Lianguo cousin is coming out of the apprentice, and now his online shop also has entered the track, he took the camera to the yarn side of the camera, while using computer graphic. Two years ago are still living in poverty this year, he intends to buy a Buick sedan.
Online Shop Every village has its own name, has its own trademark, but the goods are mostly from the surrounding several large plant-guo apprentice starved to death are not afraid of the church master it?
"I burned from the money." Guo said he already has accumulated Taobao Taobao advertising platform more than a dozen million to train the cast, the highest one-day ad costs more than 8000, at least over 2000. "The village is only my vote affordable." "Starting an online shop out to explore the unique skills of many I have left hand." Guo smugly told reporters, "This is a trade secret, we can not say."
By the end of 2008, tasted the sweetness of-guo is not completely stopped the traditional channels of business profits, wholeheartedly Taobao shop franchise. Now, he invested three million yuan in the new plant will be completed.
E-commerce in rural road
CMC director of Qinghe Cashmere Products Market Sunlian Ling told reporters that 37 million people throughout the Qing, the personnel directly involved in cashmere industry, there are 8 million people, now Qinghe County resident deposits exceeded 8.0 billion, most of the cashmere industry, are created.
He introduced, Shop this industryLCD flat Monitor is people spontaneously bring about employment with 20,000, now the annual sales of 3 billion yuan Online Shop.
Taobao release of the latest employment index, as of April 30, 2010, has 106 million people shop on Taobao achieved through employment. According to global consultancy IDC estimates, each person in employment in the online shop, would bring 2.85 related industries jobs. That is, in theory Taobao has created the industry chain 302 million jobs. If you add in Tencent's "pat", Baidu's "has ah on the" business number, this number will be even greater.
The development of a network filling the information gap between urban and rural areas, coupled with smooth logistics, Online Shop in the rural areas do no such city high warehouse rent, starting Online Shop to money to make more.
The same is true fact, some villages have special products have been successfully made through the completion of poverty to wealth.
According to reports, Suining, Jiangsu Shuyang and rural areas, respectively, flowers and furniture online shop LCD Panelrelying on business, many villagers drove the car.
E-commerce experts, the Chinese Academy of Social Sciences Research Center of the Secretary-General Jiang Qiping information told reporters that the biggest difference between rural and urban areas is the low level of socialization. Circulation of agricultural products in the middle of much friction, it is farmers have to face the short board. Farmers with the network, after the opening of the Online Shop, there will be a low-cost social network, has to train the market to avoid excessive transaction costs, to solve the most difficult problems of farmers.
Jiang Qiping said the networkPanel once and farmers combine to produce benefits far greater than other groups, farmers were more likely than other networks.
"Now farmers are selling the network characteristics of differentiated products, are the best selling, most scarce product, which is conducive to market quickly." Jiang Qiping said the future direction of development is on orders. Farmers find customers before production, production docking sales, without intermediate links, zero transaction costs, then "what agricultural products can be sold online."
Local governments and a number of preferential agricultural organizations such as the ATM stations to guide farmers, training of farmers, some of the villagers take the lead in the effectiveness Monitorof preaching more effective than direct just like the East Village's high-guo.
Online Shop brought to the village of the biggest changes is what? Guo scratched his head, Bie has a "no fight."
Quick response to gambling incidences that involved senior management staff are not
June 23 news for the recent media briefing on the Ministry of Public Security to provide quick cash to pay for the gambling Web site reports 17 million profit, quick money, sent a statement to Sohu IT clarification. Quick money that the report referred to in staff is not quick money quick money the senior management. Adding that the cooperation agreement signed with the operators belong to formal business areas, business has taken a malicious concealment means, under the cover of the formal business, engage in illegal transactions. After the discovery of suspicious questions, with the public security departments to freeze the funds and accounts of the business, take practical action to actively cooperate with the police detection work, and the police and the relevant regulatory approval.
Quick money that it has taken a series of corrective measures, conduct self-examination and in-house staff training, and strengthening the business processing and investigation measures.
The following is text of the statement:
Note the recent media reports on
1, for some media reports that employees of fast money, need to be clarified is that the employee is notLCD a quick senior management.
2, in this case, quick money and business co-operation signed between the areas are part of the formal business. But the business has taken to conceal malicious means, under the guise of formal business, engaging in illegal transactions, a serious breach of a bilateral cooperation treaty. Quick money in suspicious questions, the first time with the public security departments to freeze the funds and accounts of the business, take practical action to actively cooperate with the police in solving, by the police and the relevant regulatory approval.
3, At the same time, we have carefully analyzed the incident and adopted a series of corrective measures, in-house self-inspection and staff training in the new environment to further enhance staff awareness of risk control. In addition, we strengthened the business in a timely manner for approval and survey measures to ensure that a mechanism to stop this kind of business firm engaged in illegal use of the possibility of quick money.
4 Indeed, the rapid development of the industry will face a variety of problems and challenges. We believe that with the introduction of central bank management practices, will cover the interim period of major companies exposed Jurisprudence, credit card cash, money laundering and gambling incidences such acts play an active supervisory role. The introduction of measures to further promote the industry's product and service innovation, leading the electronic payment industry to a sustained and healthy development of a comprehensive e-commerce for the enterprise and integrated international competitiveness, contribute to the improvement.
5 Recently, some competitors in the industry malicious and exaggerated negative news quick money, we think that this whole electronic payment industry's development. From the perspective of business development, professional payment solutions and market position will
VGA Monitor
be different for the whole community to bring more e-commerce payment and settlement choices, the market needs is quality service and business innovation. Meanwhile, the electronic payment toward compliance-oriented process, the greater need for the industry team up to industry bigger and stronger, rather than each other strife.
Six, quick money, since the formal inception in 2005, has always been to secure compliance as a prerequisite for all operational work. The future, we will continue to respond positively to the central bank's policy and call management approach based on the requirements,PC monitor do their business in compliance work. We applied for the "pay business permit" full of confidence.
Quick Inc.
June 23, 2010
Quick money that it has taken a series of corrective measures, conduct self-examination and in-house staff training, and strengthening the business processing and investigation measures.
The following is text of the statement:
Note the recent media reports on
1, for some media reports that employees of fast money, need to be clarified is that the employee is notLCD a quick senior management.
2, in this case, quick money and business co-operation signed between the areas are part of the formal business. But the business has taken to conceal malicious means, under the guise of formal business, engaging in illegal transactions, a serious breach of a bilateral cooperation treaty. Quick money in suspicious questions, the first time with the public security departments to freeze the funds and accounts of the business, take practical action to actively cooperate with the police in solving, by the police and the relevant regulatory approval.
3, At the same time, we have carefully analyzed the incident and adopted a series of corrective measures, in-house self-inspection and staff training in the new environment to further enhance staff awareness of risk control. In addition, we strengthened the business in a timely manner for approval and survey measures to ensure that a mechanism to stop this kind of business firm engaged in illegal use of the possibility of quick money.
4 Indeed, the rapid development of the industry will face a variety of problems and challenges. We believe that with the introduction of central bank management practices, will cover the interim period of major companies exposed Jurisprudence, credit card cash, money laundering and gambling incidences such acts play an active supervisory role. The introduction of measures to further promote the industry's product and service innovation, leading the electronic payment industry to a sustained and healthy development of a comprehensive e-commerce for the enterprise and integrated international competitiveness, contribute to the improvement.
5 Recently, some competitors in the industry malicious and exaggerated negative news quick money, we think that this whole electronic payment industry's development. From the perspective of business development, professional payment solutions and market position will
VGA Monitor
be different for the whole community to bring more e-commerce payment and settlement choices, the market needs is quality service and business innovation. Meanwhile, the electronic payment toward compliance-oriented process, the greater need for the industry team up to industry bigger and stronger, rather than each other strife.
Six, quick money, since the formal inception in 2005, has always been to secure compliance as a prerequisite for all operational work. The future, we will continue to respond positively to the central bank's policy and call management approach based on the requirements,PC monitor do their business in compliance work. We applied for the "pay business permit" full of confidence.
Quick Inc.
June 23, 2010
China 4762 to give the least developed countries zero-tariff treatment of goods
Learned from the Ministry of Finance's 23, the State Council Tariff Commission decided that from July 1, the exchange of letters that have been completed with China in Ethiopia 33 least developed countries, the 4762 tariff lines of origin of goods exported to China zero tariff, about accounted for 60% of all tariff items. At this point, China will become the least developed countries open their markets to the extent of one of the largest developing country.
According to the Ministry of Finance introduced the integration of the original zero-tariff treatment, based on the 4762 list of zero-tariff goods tariff lines to further increase the least developed countries in recent years, actual or potential export capacity of some export commodities, including poultry and livestock , aquatic products, raw or processed agricultural products early, minerals, herbs, daily necessities, plastic products, leather, wood, textiles, apparel products, glass, steel and their products, machinery and electronic products, furniture and so on. In accordance with the 2008 trade statistics, the 4762 tariff lines of zero-tariff goods exports to China accounted for the least developed countries of 98.2%.
The future, China will in accordance with relevant national advice and recommendations, combined with effective implementation of existing measures continue to benefit To widen the scope of the eventual realization of zero tariff to cover all the tax benefits of 95% of taxable items.
The Ministry of Finance, with the full implementation of zero tariff measures, many of the least developed countries duty-free goods will enter the Chinese market, the people of the least developed countries will bring benefits, but also will help reduce the cost of imports of Chinese Enterprises to broaden our channels of imports and promote the healthy development of bilateral trade to further strengthen the least developed countries, China and the friendly relations and mutually beneficial cooperation.
Since 2001, China gradually to 41 least developed countries zero-tariff treatment to some commodities, giving the range of goods expanded. Up to now, China has given to the least developed countries were about 1,000 tariff lines duty-free treatment of goods, covering most of
TFT LCD Monitor
these countries exports to China of goods. The implementation of zero tariff measures also contributed to these countries exports to China. Data show that in 2008, China absorbed the least developed countries 23% of total exports, as the least developed countries, the largest export market.
Currently, the World Trade Organization Doha Round impasse, developed countries pledged 97% of the least developed countries products and a "duty-free, quota-free" obligation not yet been fully realized. Fenxi have pointed out, China as a developing country, experiencing severe Kaoyan global financial crisis, still faces an extremely complex challenge Jingjixingshi the occasion, the lead in implementing the least developed countries committed to the implementation of zero tariff and honor their UN Millennium XuanMonitors Yan, reflecting China to maintain the multilateral trading system open, fair and just determination and help the LDCs to improve their level of economic development in good faith
According to the Ministry of Finance introduced the integration of the original zero-tariff treatment, based on the 4762 list of zero-tariff goods tariff lines to further increase the least developed countries in recent years, actual or potential export capacity of some export commodities, including poultry and livestock , aquatic products, raw or processed agricultural products early, minerals, herbs, daily necessities, plastic products, leather, wood, textiles, apparel products, glass, steel and their products, machinery and electronic products, furniture and so on. In accordance with the 2008 trade statistics, the 4762 tariff lines of zero-tariff goods exports to China accounted for the least developed countries of 98.2%.
The future, China will in accordance with relevant national advice and recommendations, combined with effective implementation of existing measures continue to benefit To widen the scope of the eventual realization of zero tariff to cover all the tax benefits of 95% of taxable items.
The Ministry of Finance, with the full implementation of zero tariff measures, many of the least developed countries duty-free goods will enter the Chinese market, the people of the least developed countries will bring benefits, but also will help reduce the cost of imports of Chinese Enterprises to broaden our channels of imports and promote the healthy development of bilateral trade to further strengthen the least developed countries, China and the friendly relations and mutually beneficial cooperation.
Since 2001, China gradually to 41 least developed countries zero-tariff treatment to some commodities, giving the range of goods expanded. Up to now, China has given to the least developed countries were about 1,000 tariff lines duty-free treatment of goods, covering most of
TFT LCD Monitor
these countries exports to China of goods. The implementation of zero tariff measures also contributed to these countries exports to China. Data show that in 2008, China absorbed the least developed countries 23% of total exports, as the least developed countries, the largest export market.
Currently, the World Trade Organization Doha Round impasse, developed countries pledged 97% of the least developed countries products and a "duty-free, quota-free" obligation not yet been fully realized. Fenxi have pointed out, China as a developing country, experiencing severe Kaoyan global financial crisis, still faces an extremely complex challenge Jingjixingshi the occasion, the lead in implementing the least developed countries committed to the implementation of zero tariff and honor their UN Millennium XuanMonitors Yan, reflecting China to maintain the multilateral trading system open, fair and just determination and help the LDCs to improve their level of economic development in good faith
Article 27 of the Shenyang Military Region vulgar exchanges air brake ban offenders criticized
Shenyang Military Region depth politics and civilized, ethical, say frugal, green exchanges about the law, drawn up 27 ban, firmly put the vulgar style of communication. Their approach is very timely and very necessary to meet the aspirations of the officers and men. Hu advocated vigorously carry forward the good atmosphere of four aspects, we need such as the Shenyang Military Region, and realistically, and moving true, establish a strong new force winds righteousness, both grass-roots level, more grasping organs and leading cadres of setting an example. As long as unremittingly, can unite the party and army formed a powerful force.
News Record
PRC in the past, frequently received "a fine red one", is that many rank and file of the bothering; now Shenyang Military officers and men no longer have this thing trouble troubled. June 10 morning, a brigade of the Shenyang Military Region, told reporters Zhang Ganshi pleased:
10.4 Inch TFT LCD Monitor
LCD Monitor
"Military Region 27 issued the ban after red invitations everywhere, busy with social activities such as eat and drink unhealthy for themselves."
Not long ago, the leadership of the Shenyang Military Region army investigation found that at the grassroots level: officers and men to contact utilitarian, practical, vulgarization and other issues become increasingly prominent. Increasing not only the scope of exchanges, more and more items, but "only on the exchanges," "interest-only contacts" and are quite prominent, so that pure friendship between comrades been changed. According to statistics of a brigade, grassroots cadres and the expenditure year for human contact as much as 2000 to 6000 yuan as much as non-commissioned officers are between 800 to 4000 yuan.
"Communication of attached units atmosphere, about unity and harmony, cohesion of combat units directly affected." Shenyang Military Region leaders at a meeting to stress. Shenyang Military Region Political Department of the Shenyang Military Commission for Discipline Inspection of soliciting men opinions and suggestions, based on on May 31 jointly issued a "military forces to carry out green contacts certain provisions" from the behavior control, happy matters, festivals, public affairs, 6 aspects such as supervision and punishment provisions of the 27 ban, aimed at further correction of the vulgar style of communication, promote healthy and civilized interaction behavior.
"Prohibited personnel invitedLCD Monitors to participate in the internal force birthday birthday, birth of a child, child studies, move on behalf of new home and other family matters festive activities organized by ... ..." reporter read "require" to see, which strictly regulate both the activities during the festival called "iron law ", but also control the liberal" magic spell "27 ban roads clear entry key and clear.
In order to ensure that the 27 ban carried out, they opened hotlines, set up in the online column, while the green contacts, leading cadres at all levels to take the lead against the vulgar exchanges, and to harden the wrist more than 20 violations against the officers and men were criticized .
Exchanges such as the green ray of spring, blowing green barracks, blowing up people. Shenyang military region generally indicated depth politics and civilized, ethical, say frugal, green exchanges about the law, arrested in the right direction, grasp the atmosphere, inspired the people, some difficult issues, difficult things solved .
Today, health, pure and civilized exchange of green military region in the formation of the new style is. The image of some officers and men said: "Work is the best gift was the most hard background. So it be done, who do not have to look for; if so that we, whom are white look."
Related Links
27 Excerpts ban
Article 1: make arrangements for weddings and funerals, must report to the organization in advance the time, place, scale. Above the regimental level officers to the ranks of party report and the next higher level discipline inspection commission for the record; other cadres where the party organizations through the report to the Commission for Discipline Inspection of the unit; officers report to the host branch. Held for the officers and men to promote the collective wedding.
Article 7: Prohibition of the internal forces personnel invited to participate in birthday to birthday, birth of a child, child studies, move on behalf of new home and other family affairs activities and celebrations organized by accepting gifts gifts.
Article 8: Prohibition of the internal forces personnel invited to participate in advanced studies, job promotions, job changes, and other personal honor meritorious service reward for the festive activities and accepting gifts gifts.
ARTICLE 10: Prohibition of the opportunity to take holiday gift giving gifts, leading cadres are not allowed to name an individual or unit with the ceremony of gift giving. Promote holiday gathering, telephone and SMS greetings.
Article 11: Prohibition of use of the machine, I get sick relatives, subordinates or subordinate unit personnel received beyond the scope of the normal etiquette of gift gifts; against subordinates or subordinate unit personnel took the opportunity to achieve personal goals to send gifts to gifts; advocate on behalf of the unit to organize sympathy .
Article 12: 10.4 Inch Touch Screen LCD PanelProhibition to force officers and men to accept family banquets and gifts gifts.
Article 16: prohibition of personal use of public funds to entertain each other, and strictly control between the lower and comrades, please eat, please.
News Record
PRC in the past, frequently received "a fine red one", is that many rank and file of the bothering; now Shenyang Military officers and men no longer have this thing trouble troubled. June 10 morning, a brigade of the Shenyang Military Region, told reporters Zhang Ganshi pleased:
10.4 Inch TFT LCD Monitor
LCD Monitor
"Military Region 27 issued the ban after red invitations everywhere, busy with social activities such as eat and drink unhealthy for themselves."
Not long ago, the leadership of the Shenyang Military Region army investigation found that at the grassroots level: officers and men to contact utilitarian, practical, vulgarization and other issues become increasingly prominent. Increasing not only the scope of exchanges, more and more items, but "only on the exchanges," "interest-only contacts" and are quite prominent, so that pure friendship between comrades been changed. According to statistics of a brigade, grassroots cadres and the expenditure year for human contact as much as 2000 to 6000 yuan as much as non-commissioned officers are between 800 to 4000 yuan.
"Communication of attached units atmosphere, about unity and harmony, cohesion of combat units directly affected." Shenyang Military Region leaders at a meeting to stress. Shenyang Military Region Political Department of the Shenyang Military Commission for Discipline Inspection of soliciting men opinions and suggestions, based on on May 31 jointly issued a "military forces to carry out green contacts certain provisions" from the behavior control, happy matters, festivals, public affairs, 6 aspects such as supervision and punishment provisions of the 27 ban, aimed at further correction of the vulgar style of communication, promote healthy and civilized interaction behavior.
"Prohibited personnel invitedLCD Monitors to participate in the internal force birthday birthday, birth of a child, child studies, move on behalf of new home and other family matters festive activities organized by ... ..." reporter read "require" to see, which strictly regulate both the activities during the festival called "iron law ", but also control the liberal" magic spell "27 ban roads clear entry key and clear.
In order to ensure that the 27 ban carried out, they opened hotlines, set up in the online column, while the green contacts, leading cadres at all levels to take the lead against the vulgar exchanges, and to harden the wrist more than 20 violations against the officers and men were criticized .
Exchanges such as the green ray of spring, blowing green barracks, blowing up people. Shenyang military region generally indicated depth politics and civilized, ethical, say frugal, green exchanges about the law, arrested in the right direction, grasp the atmosphere, inspired the people, some difficult issues, difficult things solved .
Today, health, pure and civilized exchange of green military region in the formation of the new style is. The image of some officers and men said: "Work is the best gift was the most hard background. So it be done, who do not have to look for; if so that we, whom are white look."
Related Links
27 Excerpts ban
Article 1: make arrangements for weddings and funerals, must report to the organization in advance the time, place, scale. Above the regimental level officers to the ranks of party report and the next higher level discipline inspection commission for the record; other cadres where the party organizations through the report to the Commission for Discipline Inspection of the unit; officers report to the host branch. Held for the officers and men to promote the collective wedding.
Article 7: Prohibition of the internal forces personnel invited to participate in birthday to birthday, birth of a child, child studies, move on behalf of new home and other family affairs activities and celebrations organized by accepting gifts gifts.
Article 8: Prohibition of the internal forces personnel invited to participate in advanced studies, job promotions, job changes, and other personal honor meritorious service reward for the festive activities and accepting gifts gifts.
ARTICLE 10: Prohibition of the opportunity to take holiday gift giving gifts, leading cadres are not allowed to name an individual or unit with the ceremony of gift giving. Promote holiday gathering, telephone and SMS greetings.
Article 11: Prohibition of use of the machine, I get sick relatives, subordinates or subordinate unit personnel received beyond the scope of the normal etiquette of gift gifts; against subordinates or subordinate unit personnel took the opportunity to achieve personal goals to send gifts to gifts; advocate on behalf of the unit to organize sympathy .
Article 12: 10.4 Inch Touch Screen LCD PanelProhibition to force officers and men to accept family banquets and gifts gifts.
Article 16: prohibition of personal use of public funds to entertain each other, and strictly control between the lower and comrades, please eat, please.
Defense Ministry spokesman quietly "coaching change"
Yesterday, the Ministry
10.4 Inch VGA Monitorof National Defense Foreign Affairs Office as military attaches at the "situation in China's participation in international arms control affairs," briefing, according to reports, "introduced by the Ministry of National Defense Information Office of the Secretary Geng Yansheng colonel over."
At the same time, the reporter learned that the Department of Defense, Deputy Secretary for Information Services as the Yang Yujun. By convention, the Secretary for Defense Information
10.4 Inch LCD Touch Screen Monitor
Services Agency will also act as deputy press spokesman.
This means that the first two of the Ministry of Defence spokesman Hu Changming and Huang Xueping pioneering situation after the completion of a smooth shift, and another appointment.
Public reports show: Geng Yansheng had consolidated the Department of Defense Office of the Deputy Secretary for Foreign Affairs, Yang Yujun staff for the Board. Has toured many countries, participated in several major Chinese and foreign joint military exercises.
According to understanding, the new spokesman for the low-key post, did not publicly release information. A spokesman for the beginning of the new office had already called on relevant departments to carry out the communication with the counterparts.
In a market previously held the Ministry of Defence press conference, two new spokesman to the site to feel the spot.
"More open, transparent, to strengthen military exchanges with relevant countries," Information Office of the Department of Defense to establish the original intention. In several previous occasions, Geng Yansheng also made similar statements, necessarily believe that this tradition will continue, to do better.
Reporter impression
Hu Changming: smile, "forever"
Department of Defense's10.4 Inch LCD Touch Screen Monitors recall in 2008 on the issue of Chinese warships off the Somali coast to escort the first conference held in the Ministry of National Defense Foreign Affairs Office.
The day before the two appeared at a press spokesman also great affinity. Hu Changming not on the podium that day, he joked, his image is not good enough so let Yin.
Hu Changming in the face of a reporter, always smiling, in an interview on-site, a reporter taking it every space on the chase Hu Changming, Hu Changming always cheerful expression, 10.4 Inch Touch Screen LCD Monitorhe's playing with the "Tai Chi."
Then he smiled and told me: "She (referring to the press after him) insisted interview, can say I would say, can not say definitely can not say."
Huang Xueping: care conference "effect"
Press conference held in Yushu, after the earthquake, Huang Xueping particularly concerned about the effect of how the conference, he asked the reporter was not interested, the answer is not satisfied with the military's propaganda is not able to play the best results.
One time, a bit English media write English text, please Huang Xueping help look. Huang Xueping his use of certain sentence recommendations, subsequently, the reporter amazed.
Background Links
The end of 2007, Defense Department official said the State Information Office spokesperson system will be built.
May 2008 the Ministry of Defence spokesman Hu Changming first foreign appearance.
Defense Information Services such as the establishment of the sixtieth anniversary of National Day and many other major events organized and held many news conferences,10.4 Inch TFT LCD Touch Screen Monitor and in a timely manner to the Chinese and foreign media information on national defense and army building.
10.4 Inch VGA Monitorof National Defense Foreign Affairs Office as military attaches at the "situation in China's participation in international arms control affairs," briefing, according to reports, "introduced by the Ministry of National Defense Information Office of the Secretary Geng Yansheng colonel over."
At the same time, the reporter learned that the Department of Defense, Deputy Secretary for Information Services as the Yang Yujun. By convention, the Secretary for Defense Information
10.4 Inch LCD Touch Screen Monitor
Services Agency will also act as deputy press spokesman.
This means that the first two of the Ministry of Defence spokesman Hu Changming and Huang Xueping pioneering situation after the completion of a smooth shift, and another appointment.
Public reports show: Geng Yansheng had consolidated the Department of Defense Office of the Deputy Secretary for Foreign Affairs, Yang Yujun staff for the Board. Has toured many countries, participated in several major Chinese and foreign joint military exercises.
According to understanding, the new spokesman for the low-key post, did not publicly release information. A spokesman for the beginning of the new office had already called on relevant departments to carry out the communication with the counterparts.
In a market previously held the Ministry of Defence press conference, two new spokesman to the site to feel the spot.
"More open, transparent, to strengthen military exchanges with relevant countries," Information Office of the Department of Defense to establish the original intention. In several previous occasions, Geng Yansheng also made similar statements, necessarily believe that this tradition will continue, to do better.
Reporter impression
Hu Changming: smile, "forever"
Department of Defense's10.4 Inch LCD Touch Screen Monitors recall in 2008 on the issue of Chinese warships off the Somali coast to escort the first conference held in the Ministry of National Defense Foreign Affairs Office.
The day before the two appeared at a press spokesman also great affinity. Hu Changming not on the podium that day, he joked, his image is not good enough so let Yin.
Hu Changming in the face of a reporter, always smiling, in an interview on-site, a reporter taking it every space on the chase Hu Changming, Hu Changming always cheerful expression, 10.4 Inch Touch Screen LCD Monitorhe's playing with the "Tai Chi."
Then he smiled and told me: "She (referring to the press after him) insisted interview, can say I would say, can not say definitely can not say."
Huang Xueping: care conference "effect"
Press conference held in Yushu, after the earthquake, Huang Xueping particularly concerned about the effect of how the conference, he asked the reporter was not interested, the answer is not satisfied with the military's propaganda is not able to play the best results.
One time, a bit English media write English text, please Huang Xueping help look. Huang Xueping his use of certain sentence recommendations, subsequently, the reporter amazed.
Background Links
The end of 2007, Defense Department official said the State Information Office spokesperson system will be built.
May 2008 the Ministry of Defence spokesman Hu Changming first foreign appearance.
Defense Information Services such as the establishment of the sixtieth anniversary of National Day and many other major events organized and held many news conferences,10.4 Inch TFT LCD Touch Screen Monitor and in a timely manner to the Chinese and foreign media information on national defense and army building.
শুক্রবার, ১১ জুন, ২০১০
LED display function is how
I. What is LED?
In some semiconductor materials, PN junction, the injection of minority carrier and majority carrier recombination extra time to time to the form of light energy released, which convert light energy directly into electrical energy. PN junction reverse voltage, minority,8 inch Monitor carrier injection is difficult, it is not light. This use of principle of injection electroluminescence diodes called LEDs produced, known as LED.
LED luminous color and light-emitting efficiency and production of LED materials and processes related to the widely used red, green, and blue. As the LED voltage is low (only 1.5-3V), can take the initiative to have a certain luminescence and brightness, Brightness and voltage (or current) regulation, which itself has impact-resistant, anti-vibration, long life (100,000 hours), so in large display device, the display is currently no other way match with LED display.
The red and green LED together produced as a pixel color display screen or a color screen name; the red, green, and blue LED tube put together as a three-color pixel of the display screen or call Full color. Production of indoor LED screen pixel size is generally 2-10 mm, often used to produce several different color of the LED die into one package, outdoor LED screen pixel size mostly 12-26 mm, each pixel by a number of various color LED, the finished tube, said pixel, two-color pixel 3 red tube generally composed of two green, three-color pixel 2 red 1 green tube with a blue component.
Whether using LED production monochrome, color or tri-color screen pixels to display images need to form the luminance of each LED must be able to adjust the fine adjustment of the degree is the gray scale. The higher the gray level, the more exquisite display of images, color and the more abundant, and the corresponding display control system is also more complex. General 256 gray scale images, color transition has been very soft, while the 16-level grayscale color image, color transition boundaries clear.8 inch Panel Therefore, the current color LED screen all requests made of 256 gray scale.
2, LED brightness control method:
There are two methods of controlling LED brightness. One is to change the current flowing through the LED, LED tube to allow the general current of 20 mA continuous work around, in addition to the red LED with saturation, the other LED brightness is basically proportional to the current flowing through; Another way is to use human visual inertia with a pulse width modulation method to achieve gray scale control, which is cyclical changes in pulse width (ie duty cycle), as long as the repeated cycle of light short enough (ie the refresh rate high enough), who eye is not feel the trembling of light-emitting pixels. As the pulse width modulation is more suitable for digital control, so in general the use of computer to provide the LED display today, almost all of the LED screen is used to control the pulse width modulated gray levels.
LED control system is usually the master box, scan control unit board and was composed of three parts. Main control box from the computer's graphics card to get a colored screen pixel luminance data, then re-allocated to a number of block scanning plate, each scan control board LED screen for a number of rows (columns), and each row (column) on the LED control signal is an outstanding way to use serial transmission. There are two serial transmission mode display control signals: one is the centralized control panel scan pixel grayscale, scan board will come from the control box of each line of pixel brightness value decomposition (ie, pulse width modulation), then the opening of the line LED signals in pulses (light 1, light = 0) transmitted by serial line to the corresponding LED on the control whether they light up. This use of the device small, but the serial transmission of data volume, because in a repeating cycle of light, each pixel gray level in the 16 required under 16 pulses required under the 256 gray 256 pulses, as the device operating frequency limit, the general can only do 16-level grayscale LED screen.
Another method is to scan the contents of the plate serial transmission is not a signal for each LED in the switch but the brightness of an 8-bit binary value. Each LED has its own pulse width modulator to control the light time. Thus, in a repeating cycle of light
8 inch LCD Monitors
each pixel in 16 gray scales are required, four pulses, 256 only eight pulses under the gray, greatly reduce the serial transmission frequency. LED intensity with this method of decentralized control can be easily controlled with 256 gray scales.
· LED display function is how to achieve
* On the application of environmental and quality LED What are the requirements?
· LED display general specification
* The basic structure of graphics display
* The basic structure of the video LED display
· LED display screen performance comparison with other
* Indoor LED electronic display main technical parameters
In some semiconductor materials, PN junction, the injection of minority carrier and majority carrier recombination extra time to time to the form of light energy released, which convert light energy directly into electrical energy. PN junction reverse voltage, minority,8 inch Monitor carrier injection is difficult, it is not light. This use of principle of injection electroluminescence diodes called LEDs produced, known as LED.
LED luminous color and light-emitting efficiency and production of LED materials and processes related to the widely used red, green, and blue. As the LED voltage is low (only 1.5-3V), can take the initiative to have a certain luminescence and brightness, Brightness and voltage (or current) regulation, which itself has impact-resistant, anti-vibration, long life (100,000 hours), so in large display device, the display is currently no other way match with LED display.
The red and green LED together produced as a pixel color display screen or a color screen name; the red, green, and blue LED tube put together as a three-color pixel of the display screen or call Full color. Production of indoor LED screen pixel size is generally 2-10 mm, often used to produce several different color of the LED die into one package, outdoor LED screen pixel size mostly 12-26 mm, each pixel by a number of various color LED, the finished tube, said pixel, two-color pixel 3 red tube generally composed of two green, three-color pixel 2 red 1 green tube with a blue component.
Whether using LED production monochrome, color or tri-color screen pixels to display images need to form the luminance of each LED must be able to adjust the fine adjustment of the degree is the gray scale. The higher the gray level, the more exquisite display of images, color and the more abundant, and the corresponding display control system is also more complex. General 256 gray scale images, color transition has been very soft, while the 16-level grayscale color image, color transition boundaries clear.8 inch Panel Therefore, the current color LED screen all requests made of 256 gray scale.
2, LED brightness control method:
There are two methods of controlling LED brightness. One is to change the current flowing through the LED, LED tube to allow the general current of 20 mA continuous work around, in addition to the red LED with saturation, the other LED brightness is basically proportional to the current flowing through; Another way is to use human visual inertia with a pulse width modulation method to achieve gray scale control, which is cyclical changes in pulse width (ie duty cycle), as long as the repeated cycle of light short enough (ie the refresh rate high enough), who eye is not feel the trembling of light-emitting pixels. As the pulse width modulation is more suitable for digital control, so in general the use of computer to provide the LED display today, almost all of the LED screen is used to control the pulse width modulated gray levels.
LED control system is usually the master box, scan control unit board and was composed of three parts. Main control box from the computer's graphics card to get a colored screen pixel luminance data, then re-allocated to a number of block scanning plate, each scan control board LED screen for a number of rows (columns), and each row (column) on the LED control signal is an outstanding way to use serial transmission. There are two serial transmission mode display control signals: one is the centralized control panel scan pixel grayscale, scan board will come from the control box of each line of pixel brightness value decomposition (ie, pulse width modulation), then the opening of the line LED signals in pulses (light 1, light = 0) transmitted by serial line to the corresponding LED on the control whether they light up. This use of the device small, but the serial transmission of data volume, because in a repeating cycle of light, each pixel gray level in the 16 required under 16 pulses required under the 256 gray 256 pulses, as the device operating frequency limit, the general can only do 16-level grayscale LED screen.
Another method is to scan the contents of the plate serial transmission is not a signal for each LED in the switch but the brightness of an 8-bit binary value. Each LED has its own pulse width modulator to control the light time. Thus, in a repeating cycle of light
8 inch LCD Monitors
each pixel in 16 gray scales are required, four pulses, 256 only eight pulses under the gray, greatly reduce the serial transmission frequency. LED intensity with this method of decentralized control can be easily controlled with 256 gray scales.
· LED display function is how to achieve
* On the application of environmental and quality LED What are the requirements?
· LED display general specification
* The basic structure of graphics display
* The basic structure of the video LED display
· LED display screen performance comparison with other
* Indoor LED electronic display main technical parameters
The basic structure of the video LED display
Video LED display is usually the main controller, scan board, display control unit and the LED display body composition, as shown. Master controller for a graphics card from the computer screen colors 8 inch LCD Panel each pixel luminance data, then a number of blocks allocated to the scan plate, each scanning LED display control board is responsible for a number of rows (columns), and each row (column) on the LED display with a serial signal is adopted in all our shows cascade transmission control unit, each display control unit body directly facing the LED display.
The work done by the main
10.4 inch LCD Monitor
controller is to the computer display is equipped with card signals into LED display the required data and control signal format.
Display Control and the role of transport, and image display similar to the situation, generally with a gray-level control functions constitute a shift register latch. LED display is the size of the video more often, so you should use a larger-scale integrated circuit, such as my company's chips.
The role of scanning Wrench is the so-called nexus, on the one hand it accepts the main controller of the video signal, the other belonging to the class data to its various display control unit, but also the data does not belong to the class down pull a cascade of transmission scan. Video signal and the LED display data in space, time, sequence differences in other areas, should have a scan board to coordinate.
LED display screen performance comparison with other
LED light-emitting devices in the luminous intensity, color, response speed, power consumption, reliability,8 inch TFT Monitor
longevity and resistance to adverse environment, with comprehensive advantages, making it the main instrument of public information release.
Ordinary LED luminous intensity luminous intensity luminous light around 10mcd (cents Candela), high brightness LED light, etc. for the 10-100mcd, high brightness LED light lights luminous intensity over the 100mcd. General LED LED lights for indoor applications, such as ultra-high brightness LED light can be used outdoors.
Color LED light-emitting devices by using different semiconductor materials, may issue a different wavelength of light, that is, different colors of light. LED devices are more common red, orange, yellow, green and other colors. Have recently developed and produced high brightness blue LED devices, thus promoting the three primary colors based on RGB full-color LED display and rapid realization of wide application. This is the most recent period of rapid rise in full color one of the key factors.
Response speed response frequency of LED devices and into a small number of the life of the carrier, its response frequency is about 16-160MHz, so the response of high frequency 6.5MHz for the display of the video signal is already enough. It is the realization of video LED display one of the key factors.
LED light lamp power consumption of ordinary working current of only 10mA, high brightness LED devices, but also the operating current 100mA, with its operating voltage of only 2V or so, so the power consumption minimal.
Reliability, longevity and resistance to adverse environmental performance is solid as LED devices, significantly higher than the reliability of electronic vacuum devices such as CRT is much higher and there is no limit, such as cathode-aging and life issues. Vibration properties of impact of solid devices is also much higher than other display device.
LED and CRT, filter incandescent lamp, optical fiber, piracy and other displays of performance comparison, the following table:
Project LED CRT filter pirated optical fiber incandescent
Slow response speed in the slow-fast
Strong resistance to harsh environments in the bell in the strong
High reliability,8 inch LCD flat Panel Monitor low Low Medium High
Long life in the short-long-long
High High Low High brightness
Light weight of the light
Large power consumption of large size
High in the low-cost high
Axial Angle greatly greatly
The work done by the main
10.4 inch LCD Monitor
controller is to the computer display is equipped with card signals into LED display the required data and control signal format.
Display Control and the role of transport, and image display similar to the situation, generally with a gray-level control functions constitute a shift register latch. LED display is the size of the video more often, so you should use a larger-scale integrated circuit, such as my company's chips.
The role of scanning Wrench is the so-called nexus, on the one hand it accepts the main controller of the video signal, the other belonging to the class data to its various display control unit, but also the data does not belong to the class down pull a cascade of transmission scan. Video signal and the LED display data in space, time, sequence differences in other areas, should have a scan board to coordinate.
LED display screen performance comparison with other
LED light-emitting devices in the luminous intensity, color, response speed, power consumption, reliability,8 inch TFT Monitor
longevity and resistance to adverse environment, with comprehensive advantages, making it the main instrument of public information release.
Ordinary LED luminous intensity luminous intensity luminous light around 10mcd (cents Candela), high brightness LED light, etc. for the 10-100mcd, high brightness LED light lights luminous intensity over the 100mcd. General LED LED lights for indoor applications, such as ultra-high brightness LED light can be used outdoors.
Color LED light-emitting devices by using different semiconductor materials, may issue a different wavelength of light, that is, different colors of light. LED devices are more common red, orange, yellow, green and other colors. Have recently developed and produced high brightness blue LED devices, thus promoting the three primary colors based on RGB full-color LED display and rapid realization of wide application. This is the most recent period of rapid rise in full color one of the key factors.
Response speed response frequency of LED devices and into a small number of the life of the carrier, its response frequency is about 16-160MHz, so the response of high frequency 6.5MHz for the display of the video signal is already enough. It is the realization of video LED display one of the key factors.
LED light lamp power consumption of ordinary working current of only 10mA, high brightness LED devices, but also the operating current 100mA, with its operating voltage of only 2V or so, so the power consumption minimal.
Reliability, longevity and resistance to adverse environmental performance is solid as LED devices, significantly higher than the reliability of electronic vacuum devices such as CRT is much higher and there is no limit, such as cathode-aging and life issues. Vibration properties of impact of solid devices is also much higher than other display device.
LED and CRT, filter incandescent lamp, optical fiber, piracy and other displays of performance comparison, the following table:
Project LED CRT filter pirated optical fiber incandescent
Slow response speed in the slow-fast
Strong resistance to harsh environments in the bell in the strong
High reliability,8 inch LCD flat Panel Monitor low Low Medium High
Long life in the short-long-long
High High Low High brightness
Light weight of the light
Large power consumption of large size
High in the low-cost high
Axial Angle greatly greatly
Production of LED display-related information?
Taught you how to assemble LED display section of the article above for the level of electrical technicians, including electronic professional college graduates to read. Since the tutorial invo10.4 inch Monitorslves strong electricity, please pay attention to safety. Directory
1. LED strip screen overview
2. Shall screen applications:
2.1. Advertisement Application --- New Media, new effects, new business
2.2. System Integration - Development of 2
3. Assembly significance
3.1. Screen composition
3.1.1. Unit board
3.1.2. Power
3.1.3. Control Card
3.1.4. On 16PIN 08 Interface
3.1.5. Connection
3.2. Parts production
3.2.1. Cable (data cable) Production
3.2.2. Power cord production
3.2.3. RS232 line production
3.3. Cabling Guide
4. Software Help-LED-UPDATE
4.1. Easy to use step
4.2. LED-UPDATE Details
4.2.1. Set the screen parameters
4.2.2. Batch save the information to the screen, automatic cycle show
4.2.3. Delete information
4.2.4. Send independent information
4.2.5. The list of save and open
4.3. Software descriptions and pictures of the replacement
5. Frame Production
5.1. Scaffolds
5.2. Simple box production process
5.3. Stainless steel frame production process
5.4. Aluminum frame
6. Troubleshooting
6.1. No display
6.2. Show confusion
6.3. Can not update the screen data
7. Tools and Accessories
Taught you assembly of LED screens article
1. LED strip screen overview
LED screen, as new media, sports luminous illustrations, more easily attract the attention of large amount of information kept up to date, has a very good effect of advertising and notices. More simple than the Neon LED screen, easy to install and use the results change more, you can always update the content, is a very good indoor and outdoor made visual media. LED screens are high-tech electronic products, the price is relatively high, previously concentrated in the government and the units used. Technological advances continue to lower prices, assembly and maintenance easier. Small LED screen section, because they are inexpensive to install and simple to use, long been accepted by the public, and gradually into the size of the store, application is more popular, and gradually began to spread.
2. Shall screen applications:
2.1. Advertisement Application --- New Media, new effects, new business
LED screen as the new media section is new type of decorative materials, interior decoration can be embedded in many of them to make decorations more dynamic, constantly updated subtitles, as the new boards, promotional offers and promotional information. Greatly enhance the interior of the grade, with good visual effects. As the LED section of the screen to install and use some of the technical content, limiting the advertising industry. Master LED technology, the technology can increase the interior content, expand their business.
2.2. System Integration - Development of 2
Article LED screen, as simple control, embedded in various types of equipment for the general public. Font large, dynamic and informative, for remote viewing, time broadcast news to the public, to attract public attention. Widely applied to the queuing system, reporting station system, drinking fountains and so on. LED strip screen controller, functionality is simple and stable, can be easily embedded into the system inside, eliminating the need for developers to develop LED display of the tedious work, will focus more on system functionality and innovation. LED strip screen control card development kits, provide detailed examples of the development, system integration for you and 2 provide a good environment for development.
_ 3. Assembly significance
LED industry chain has been perfect, all the accessories can easily buy online, LED technical parameters of the increasingly unified, industry-standard shape, all parts have been modular. To lay the foundation for self-assembly of LED screens. LED strip screen, due to lower material costs, the retail price is high, when the bulk procurement of the LED screen supplier, when good control of costs and prices. The end user is not familiar with the LED screen, requires suppliers to provide installation and maintenance services, so self-assembled LED screen in the local sales, with the maximum profit.
For example: assembling a 128x16 points, single red LED indoor screen, by connecting the PC serial port update the contents of the screen
3.1. Screen composition
Shall let you know what LED screen composition, cell board, power supply, control card, connection
10.4 inch TFT LCD Monitor
Cell plate back
Unit front panel
_
Switching power supply and LED strip screen control card
(Parts per sample picture) 3.1.1. Unit board
LED display unit board is one of the core components of the unit board are directly affected by the display effect. Cell plate from the LED module, driver IC and PCB board composition. LED module, in fact, lots of LED light from the point up with a resin or plastic package lattice.
Driver IC is mainly 74HC595 74HC245/244 74HC138 4953.
Common indoor unit board shall screen size are:
Parameters: D = 3.75; Pitch 4.75mm 64-point wide-x16 point high, 1 / 16 sweep indoor light. Single red / red and green color
Parameter explanation:
LED diameter: refers to the diameter of light-emitting points D = 3.75mm
Light point distance of 4.75mm ---- according to the distance between the viewer choice, indoors usually selected 4.75
Unit Board Size: 64x16 --- the most common cell plate, the most readily available, the cheapest price.
1 / 16 scan: unit board of control.
Indoor Brightness: LED light points that the brightness, the brightness for indoor fluorescent lighting during the day needs to depend on the environment.
Color: One red, the most common and cheapest prices. Generally refers to red-green color, high price.
If you want to point a 128x16 screen, just use two units cascaded together can be a plate.
_ 3.1.2. Power
General using the power switch, 220V input, 5V DC output. Be noted that the LED display screen is as sophisticated electronic equipment, so using switching power supply, can not use transformers. For a single unit red indoor 64x16 board, all dark, current of 2A.
Reasoning out, 128x16 bright color screen all the time, current is 8A. Should choose 5V10A the switching power supply.
3.1.3. Control Card
We recommend using a low-cost screen control card section, you can control the 1 / 16 sweep of 256x16 points of the two-color screen, you can assemble the most cost-competitive LED screen. The control card is an asynchronous card, that is, the card can power save information, does not need to connect PC can display the information stored in it.
For more information, please refer to the user manual of the control card. http://www.smsled.com/
When the procurement unit board, ask the parameters clearly, 100% compatible with the unit board are:
08 points from the 64-point interfaces 4.75mm wide x16 high point, 1 / 16 sweep indoor light. Single red / red and green color
08 points from the 64-point interfaces 7.62mm wide x16 high point, 1 / 16 sweep indoor light. Single red / red and green color
08 points from the 64-point interfaces 7.62mm wide x16 high point, 1 / 16 semi-outdoor sweep brightness. Single red / red and green color
_
The controller interfaces with 16PIN 08 3.1.4. On 16PIN 08 Interface
As the cell plate and control the number of card manufacturers, so many cell board style interface, LED screen in the assembly, he must first determine the consistency of the interface only to facilitate assembly. Introduced here only the most commonly used LED Interface: LED Industry Code: 16PIN 08 Interface: he interface the following order:
2ABCDG1G2STBCLK161NNNENR1R2NN15 explained:
ABCD for the row selection signal,10.4 inch PC monitor STB (LT) as the latch signal, CLK (CK) as the clock signal, R1, R2, G1, G2 to display data, EN enable for the show, N for the ground (GND). Recognition unit control card interface board and the same, you can directly connected. And if not, will need to produce their own conversion line (to change the line order)
3.1.5. Connection
Divided into data lines, transmission lines, and power lines. Data cable for connecting control card and the LED board cable unit, transmission line for connecting control card and computer. Power cord is used to connect power and control card, power supply and LED module board. Connect the power unit board not less than the diameter copper wire of 1mm (mm)
3.2. Parts production
3.2.1. Cable (data cable) Production
Cable and data lines inside the computer chassis similar, but somewhat different line width. The city can buy in computer-related materials. Production of cables, need a tool that is of special pliers (picture), can greatly enhance the efficiency and yield. The materials produced cable: cable, thread scheduling, cable cap. Here we note that, if you make 16PIN (16 lines) emission lines, need to buy 16PIN the line and the corresponding row of the size of thread and cap. Production step, the thread cut with scissors flat, then put the first row of thread, (note line and head balance), and then into the central pressure of pliers, hard pressed, then wound over, installed cable cap. Cable hat is important, can effectively protect the cable, so cable is more sturdy, not provincial.
_
(Pliers photo cable accessories) 3.2.2. Power cord production
Power into 220V power cord and 5V power line. 220V power cable for connecting to the mains power switch, preferably a 3-pin plug, you can buy at the hardware store. Described here focuses on 5V DC power cord, because the current 5V larger, preferably more than 1mm in diameter, copper red and black on the line (be sure to red and black). Able to do so, it is best to line the two metal pieces fitted
_
(Figure) 3.2.3. RS232 line production
RS232 cable for connecting computers and control card, update the screen data. It should be used first and the DB9 cable (you can buy Computer City). Carefully observe the DB9 head, above a digital, connected to 5 brown, brown white of 3 connections. The cable clamp, mounted Fortunately DB9 head. (This is important, we must clamp, pull their own a few and see if a pull on the break). Then with a multimeter measuring about 2, if conduction. It should be pointed out, DB9 male head and female sub-head. Home computer is behind the seat, so buy a plug corresponding to the public. If you do not understand, please carefully look at your PC. Are generally not the serial port laptop, buy a USB-RS232 serial line
_
(DB9 accessories picture) 3.3. Cabling Guide
First installed, please strictly follow the steps to operate, reduce error.
Step 1: Check the power supply voltage, to identify positive and negative DC link power supply, the 220V power cord connected to the switching power supply, (the connection is correct, the terminal connected to the AC or NL) and then connecting the power. Will find the power supply has a lantern light, and then with a multimeter, DC range measuring about between V + and V-voltage, to ensure the voltage is between 4.8V-5.1V, next to a knob, you can adjust what voltage Phillips screwdriver. To reduce the heat to extend the life of the screen, in the brightness of less demanding situations, you can adjust the voltage to between 4.5V-4.8. Sure voltage is not the problem, disconnect the power, continue to assemble other parts.
Step 2: first power-down. Connect the red wire to V +, V-Connect the black wire, are connected to the control card and the LED module board, black line access control cards and power supply GND. Red line connection control card and cell board +5 V VCC. Each cell board a power cord. 10.4 inch LCD Monitors Upon completion, please check connections.
Power connection diagram Step 3: Connect the control and unit board, with the good of the flat cable, to connect. Note that the direction can not be reversed. Please note that unit interface board 2 16PIN, 1 is the input, and 1 output, close to the 74HC245/244 is input, the control card connected to the input. Output to connect to the next unit of input board
1. LED strip screen overview
2. Shall screen applications:
2.1. Advertisement Application --- New Media, new effects, new business
2.2. System Integration - Development of 2
3. Assembly significance
3.1. Screen composition
3.1.1. Unit board
3.1.2. Power
3.1.3. Control Card
3.1.4. On 16PIN 08 Interface
3.1.5. Connection
3.2. Parts production
3.2.1. Cable (data cable) Production
3.2.2. Power cord production
3.2.3. RS232 line production
3.3. Cabling Guide
4. Software Help-LED-UPDATE
4.1. Easy to use step
4.2. LED-UPDATE Details
4.2.1. Set the screen parameters
4.2.2. Batch save the information to the screen, automatic cycle show
4.2.3. Delete information
4.2.4. Send independent information
4.2.5. The list of save and open
4.3. Software descriptions and pictures of the replacement
5. Frame Production
5.1. Scaffolds
5.2. Simple box production process
5.3. Stainless steel frame production process
5.4. Aluminum frame
6. Troubleshooting
6.1. No display
6.2. Show confusion
6.3. Can not update the screen data
7. Tools and Accessories
Taught you assembly of LED screens article
1. LED strip screen overview
LED screen, as new media, sports luminous illustrations, more easily attract the attention of large amount of information kept up to date, has a very good effect of advertising and notices. More simple than the Neon LED screen, easy to install and use the results change more, you can always update the content, is a very good indoor and outdoor made visual media. LED screens are high-tech electronic products, the price is relatively high, previously concentrated in the government and the units used. Technological advances continue to lower prices, assembly and maintenance easier. Small LED screen section, because they are inexpensive to install and simple to use, long been accepted by the public, and gradually into the size of the store, application is more popular, and gradually began to spread.
2. Shall screen applications:
2.1. Advertisement Application --- New Media, new effects, new business
LED screen as the new media section is new type of decorative materials, interior decoration can be embedded in many of them to make decorations more dynamic, constantly updated subtitles, as the new boards, promotional offers and promotional information. Greatly enhance the interior of the grade, with good visual effects. As the LED section of the screen to install and use some of the technical content, limiting the advertising industry. Master LED technology, the technology can increase the interior content, expand their business.
2.2. System Integration - Development of 2
Article LED screen, as simple control, embedded in various types of equipment for the general public. Font large, dynamic and informative, for remote viewing, time broadcast news to the public, to attract public attention. Widely applied to the queuing system, reporting station system, drinking fountains and so on. LED strip screen controller, functionality is simple and stable, can be easily embedded into the system inside, eliminating the need for developers to develop LED display of the tedious work, will focus more on system functionality and innovation. LED strip screen control card development kits, provide detailed examples of the development, system integration for you and 2 provide a good environment for development.
_ 3. Assembly significance
LED industry chain has been perfect, all the accessories can easily buy online, LED technical parameters of the increasingly unified, industry-standard shape, all parts have been modular. To lay the foundation for self-assembly of LED screens. LED strip screen, due to lower material costs, the retail price is high, when the bulk procurement of the LED screen supplier, when good control of costs and prices. The end user is not familiar with the LED screen, requires suppliers to provide installation and maintenance services, so self-assembled LED screen in the local sales, with the maximum profit.
For example: assembling a 128x16 points, single red LED indoor screen, by connecting the PC serial port update the contents of the screen
3.1. Screen composition
Shall let you know what LED screen composition, cell board, power supply, control card, connection
10.4 inch TFT LCD Monitor
Cell plate back
Unit front panel
_
Switching power supply and LED strip screen control card
(Parts per sample picture) 3.1.1. Unit board
LED display unit board is one of the core components of the unit board are directly affected by the display effect. Cell plate from the LED module, driver IC and PCB board composition. LED module, in fact, lots of LED light from the point up with a resin or plastic package lattice.
Driver IC is mainly 74HC595 74HC245/244 74HC138 4953.
Common indoor unit board shall screen size are:
Parameters: D = 3.75; Pitch 4.75mm 64-point wide-x16 point high, 1 / 16 sweep indoor light. Single red / red and green color
Parameter explanation:
LED diameter: refers to the diameter of light-emitting points D = 3.75mm
Light point distance of 4.75mm ---- according to the distance between the viewer choice, indoors usually selected 4.75
Unit Board Size: 64x16 --- the most common cell plate, the most readily available, the cheapest price.
1 / 16 scan: unit board of control.
Indoor Brightness: LED light points that the brightness, the brightness for indoor fluorescent lighting during the day needs to depend on the environment.
Color: One red, the most common and cheapest prices. Generally refers to red-green color, high price.
If you want to point a 128x16 screen, just use two units cascaded together can be a plate.
_ 3.1.2. Power
General using the power switch, 220V input, 5V DC output. Be noted that the LED display screen is as sophisticated electronic equipment, so using switching power supply, can not use transformers. For a single unit red indoor 64x16 board, all dark, current of 2A.
Reasoning out, 128x16 bright color screen all the time, current is 8A. Should choose 5V10A the switching power supply.
3.1.3. Control Card
We recommend using a low-cost screen control card section, you can control the 1 / 16 sweep of 256x16 points of the two-color screen, you can assemble the most cost-competitive LED screen. The control card is an asynchronous card, that is, the card can power save information, does not need to connect PC can display the information stored in it.
For more information, please refer to the user manual of the control card. http://www.smsled.com/
When the procurement unit board, ask the parameters clearly, 100% compatible with the unit board are:
08 points from the 64-point interfaces 4.75mm wide x16 high point, 1 / 16 sweep indoor light. Single red / red and green color
08 points from the 64-point interfaces 7.62mm wide x16 high point, 1 / 16 sweep indoor light. Single red / red and green color
08 points from the 64-point interfaces 7.62mm wide x16 high point, 1 / 16 semi-outdoor sweep brightness. Single red / red and green color
_
The controller interfaces with 16PIN 08 3.1.4. On 16PIN 08 Interface
As the cell plate and control the number of card manufacturers, so many cell board style interface, LED screen in the assembly, he must first determine the consistency of the interface only to facilitate assembly. Introduced here only the most commonly used LED Interface: LED Industry Code: 16PIN 08 Interface: he interface the following order:
2ABCDG1G2STBCLK161NNNENR1R2NN15 explained:
ABCD for the row selection signal,10.4 inch PC monitor STB (LT) as the latch signal, CLK (CK) as the clock signal, R1, R2, G1, G2 to display data, EN enable for the show, N for the ground (GND). Recognition unit control card interface board and the same, you can directly connected. And if not, will need to produce their own conversion line (to change the line order)
3.1.5. Connection
Divided into data lines, transmission lines, and power lines. Data cable for connecting control card and the LED board cable unit, transmission line for connecting control card and computer. Power cord is used to connect power and control card, power supply and LED module board. Connect the power unit board not less than the diameter copper wire of 1mm (mm)
3.2. Parts production
3.2.1. Cable (data cable) Production
Cable and data lines inside the computer chassis similar, but somewhat different line width. The city can buy in computer-related materials. Production of cables, need a tool that is of special pliers (picture), can greatly enhance the efficiency and yield. The materials produced cable: cable, thread scheduling, cable cap. Here we note that, if you make 16PIN (16 lines) emission lines, need to buy 16PIN the line and the corresponding row of the size of thread and cap. Production step, the thread cut with scissors flat, then put the first row of thread, (note line and head balance), and then into the central pressure of pliers, hard pressed, then wound over, installed cable cap. Cable hat is important, can effectively protect the cable, so cable is more sturdy, not provincial.
_
(Pliers photo cable accessories) 3.2.2. Power cord production
Power into 220V power cord and 5V power line. 220V power cable for connecting to the mains power switch, preferably a 3-pin plug, you can buy at the hardware store. Described here focuses on 5V DC power cord, because the current 5V larger, preferably more than 1mm in diameter, copper red and black on the line (be sure to red and black). Able to do so, it is best to line the two metal pieces fitted
_
(Figure) 3.2.3. RS232 line production
RS232 cable for connecting computers and control card, update the screen data. It should be used first and the DB9 cable (you can buy Computer City). Carefully observe the DB9 head, above a digital, connected to 5 brown, brown white of 3 connections. The cable clamp, mounted Fortunately DB9 head. (This is important, we must clamp, pull their own a few and see if a pull on the break). Then with a multimeter measuring about 2, if conduction. It should be pointed out, DB9 male head and female sub-head. Home computer is behind the seat, so buy a plug corresponding to the public. If you do not understand, please carefully look at your PC. Are generally not the serial port laptop, buy a USB-RS232 serial line
_
(DB9 accessories picture) 3.3. Cabling Guide
First installed, please strictly follow the steps to operate, reduce error.
Step 1: Check the power supply voltage, to identify positive and negative DC link power supply, the 220V power cord connected to the switching power supply, (the connection is correct, the terminal connected to the AC or NL) and then connecting the power. Will find the power supply has a lantern light, and then with a multimeter, DC range measuring about between V + and V-voltage, to ensure the voltage is between 4.8V-5.1V, next to a knob, you can adjust what voltage Phillips screwdriver. To reduce the heat to extend the life of the screen, in the brightness of less demanding situations, you can adjust the voltage to between 4.5V-4.8. Sure voltage is not the problem, disconnect the power, continue to assemble other parts.
Step 2: first power-down. Connect the red wire to V +, V-Connect the black wire, are connected to the control card and the LED module board, black line access control cards and power supply GND. Red line connection control card and cell board +5 V VCC. Each cell board a power cord. 10.4 inch LCD Monitors Upon completion, please check connections.
Power connection diagram Step 3: Connect the control and unit board, with the good of the flat cable, to connect. Note that the direction can not be reversed. Please note that unit interface board 2 16PIN, 1 is the input, and 1 output, close to the 74HC245/244 is input, the control card connected to the input. Output to connect to the next unit of input board
Just do LED display sales,
To clearly understand the customers to do indoor or outdoor LED display? Full color can be used to broadcast television, DVD: color screen can display the general picture, but the effect was not good. Mainly text-based monochrome screens. Full color display, full-screen points minimum requirement of 5 million or more. Display area so decided to use the model?
Ⅱ, Product Terms
1 What is LED
LED is the abbreviation LED (LIGHT EMITTING DIODE), said LED display industry, the visible light range can be issued Tezhi LED
2, What is pixel
10.4 inch Monitor
The minimum luminous LED display units, computer monitors have said the same general meaning of the same pixel
3 What is the pixel pitch (dot pitch)
Between two adjacent pixels in the center distance;
4 What is the LED display module
Shown by the number of pixels composed of structural independence, to form the smallest unit LED display. A typical 8 * 8,8 * 7, etc.
5 What is DIP
DIP is DOUBLE IN-LINE PACKAGE acronym DIP assembly
6 What is SMT? What is SMD?
SMT is Surface Mount Technology (SURFACE MOUNTED technology acronym), is the electronics assembly industry's most popular form of technology and process;
SMD is a SMD (surface mounted device abbreviation)
7, What is the LED display module
A circuit and installation of structures identified with display capabilities, achieved through a simple assembling the basic unit of display functions
8, What is the LED display
Some control by way of LED device array formed by the display screen;
9 What is the plug lamp module, what the strengths and weaknesses?
Refers to the DIP package, the light will light foot through the PCB, by soldering the tin filled hole in the lamp, made of this technology by the modules is plug light touch group, the advantages are: high brightness, good heat dissipation, disadvantage is pixel density.
10: What is a surface mount module? Strengths and weaknesses?
SMD also called SMT, the SMT package light by welding in the surface of the PCB board, not through the PCB board light feet, made of modules by this process is called surface mount module, the advantages are: effects, good pixel density, suitable for indoor viewing: drawback is that brightness is not high enough, heat lamp itself is not good enough.
11, what is the sub-surface mount module? Strengths and weaknesses?
Asia between DIP and Surface Mount is a product between the SMT, the LED lamps and SMT packaging, like the surface, but its positive and negative pin and DIP the same level, production is through the PCB to solder, and its advantages are: high brightness, effects, good and disadvantages are: complex process, difficult to maintain;
12, what is the 3-one? What are the advantages and disadvantages?
Refers to three different colors RGB LED Lamp SMT chip package vertical spacing in accordance with certain juxtaposition, so all in all not only have the three advantages of unity, but also solve the three-in-various disadvantages: complex process, difficult to maintain .
13 What is three and a
Is the RGB SMT package of three independent light vertical spacing in accordance with certain juxtaposition, so not only has all the advantages of 3-one, but also to solve the shortcomings of three-in:
14, what is the two-color, pseudo color, full-color display
Through the different colors of light-emitting diodes to form a different screen, double color is red, green or yellow and green colors of the two pseudo-color is red, green, blue, composed of three different colors, full color is red , pure green, blue composed of three different colors.
15: What is the brightness
LED display unit area emitted light intensity, the unit is the CD / square meter, a simple screen that is issued by a square light intensity;
16: What is the brightness level? Full screen brightness to maximum brightness in the bottom of the manual or automatic adjustment between the series.
17, what is the gray level
In the same brightness level, the display from the darkest to the brightest technical processing between the series
18, what is the maximum brightness
Under certain environmental illumination, LED display every color in the maximum brightness and maximum gray level of time;
19, What is PCB
PCB is the (printed circuit board the abbreviation) printed circuit board
20 What is a BOM
BOM is the (bill of material for short) bill of materials
21: What is white balance, what is the white balance adjustment
We are talking about white balance, white balance means that the ratio of the brightness of RGB three colors balanced; RGB three colors, the brightness ratio and white coordinate regulation, known as white balance adjustment;
22: What is the contrast
Under certain environmental illumination, LED display maximum brightness and background brightness ratio.
23, what is the color temperature
The color of light emission and blackbody radiation at a temperature of light hue also known as the blackbody temperature of light source color temperature.
What is the frame frequency of 24
Unit time the number of display screen information is updated;
25, what is the refresh rate
Display screen in the unit time is the number of times repeated;
26: What is the perspective? What is the viewing angle? What is the best view?
Perspective is to observe the direction of the LED display brightness down to normal brightness of 1 / 2. Two observations with a plane normal direction as the direction and angle. Divided into horizontal and vertical viewing angles;
Viewing angle is just content to see the direction of the image on the screen, and into the corner of the screen normal.
The best perspective is to just to see the contents of the screen, and not flat color, the images in the most clear direction and become normal by the angle;
27: What is the best line of sight?
Is able to complete just to see the contents of the screen, and not flat color, the images in the most clear position relative to the vertical distance matrix screen:
28: What is the control point? Several hours!
LED status and control requirements of the pixels do not match, control points are divided into: the blind spot (also known as dead), often bright (or dark points) Flash point of three;
29, what is the static drive:? What is a scan driver? What is the difference between the two?
The output from the driver IC pin to the pixels between the implementation of "point" of control is called the static drive, from the driver IC output pin to the pixels between the implementation of "points out" the control is called the scan driver, he needs to line control circuit : From the driver board can be clearly seen: the static drivers do not need to line control circuit, the high cost of education, but the effects, good, good stability, brightness and small loss of education; scan driver it needs to line control circuits, low-cost , showed poor results, brightness and large loss of education;
30, what is the constant current driver? What is a constant drive?
Constant current driver IC is allowed to work in the environment, the design provides a constant output current value: constant is in the driver IC to allow the work environment, the constant output voltage under design;
31, what is the nonlinear correction?
If the computer output of digital signal without correction of the show will appear in the LED display on the color distortion, so the system control circuit, the original computer output signal through a nonlinear function of quantified signals required display , as between before and after the signal is linear, so we often call it non-linear correction.
32 What is the rated voltage? What is the voltage? What is the supply voltage?
Rated working voltage refers to voltage of the normal working voltage; working voltage refers to the electrical voltage in the rated range, the normal working voltage values: supply voltage sub-exchange and tributaries supply voltage, AC power realities of our voltage are AC220V --- 240V, DC 5V DC12V supply voltage are generally 12V solar power are generally
33, What is the color distortion? Refers to an object in nature and with the monitor display, both for the human eye the difference between the visual senses.
34: What is a synchronous system, what is the asynchronous system?
Synchronous and asynchronous relative to the computer said, the so-called synchronous system, is shown in the contents of the screen and computer monitor simultaneously display LED display control system; asynchronous system means that the computer edited display data stored in advance In the display control system, the computer shutdown will not affect the normal LED display shows that the control system is asynchronous control systems
35 What is a blind spot detection technology
Through the host software and underlying hardware, can display a blind spot (LED open circuit and short circuit) detected, and the formation of the report told the LED screen manager, so a technique called blind-spot detection technology;
36, what is the power detection
Through the host software and underlying hardware, can display on the work of the various power supply detected, and make reports to tell LED Screen managers, such a technology called Power Detection
37, what is the brightness detection? What is the brightness adjustment?
Brightness detection LED display brightness is the brightness of the host environment, through optical sensor, will display at the current ambient light detected, this detection method is called light detection; brightness adjustment is the brightness of said LED display issued to the brightness of the detected data feedback to the LED display control system or control computer, and then adjust the brightness of the display of data, called the brightness adjustment;
38 What is the actual pixels? What is a virtual pixels? The types of virtual sub-pixels? What is a pixel to share?
Real-pixel screen is the physical pixel count and the actual display is a 1:1 relationship between the pixels, the display the actual number of points, how many points can only display the image information.
Virtual pixel refers to the physical pixel count and display the actual display pixel points 1: N (N = 2,4) relationship, it can display the actual image pixels than screen pixels, or more than 2 times 4 times;
Virtual pixel can be divided into according to the virtual: virtual and hardware virtualization software: In accordance with multiple relations is divided into 2 times and 4 times the virtual virtual, according to a row of lights on the way modules are divided into: 1R1G1B 2R1G1B virtual and virtual;
39, what is the remote control? Under what circumstances to use?
Distance is not necessarily the so-called 10.4 inch LCDlong-distance. Remote control including control of the master controller and is a LAN side, but space is not far away; and the main controller and the controlled-side in distant space distance of two, the customer request or under the control position beyond the fiber directly to customers control the distance, then use the remote control;
40 What is a fiber optic transmission? What is a cable transmission?
Signal optical fiber transmission is replaced by optical signal transmission using a transparent glass fiber, cable transmission is the use of metal wire transfer signals directly.
41, the circumstances under which cable to use? Fiber under what circumstances?
When the computer display and control wiring distance is less than 100 meters, with a cable transmission; when the distance between them is less than 500 meters over 100 meters with multimode fiber, 10.4 inch LCD monitorwhile distances greater than 500 meters or more, with single-mode fiber.
42 What is a LAN control? What is the Internet control?
Within the LAN in a computer controlled by another computer or connect to other external devices, this control method is called local area network control, the host controller is controller through the INTERNET network IP address, to control purposes, known as the Internet control;
43 What is DVI? What is VGA?
DVI stands for Digital Video interface is that the digital video interface. It is now internationally used a digital video signal interface.
44 What is a digital signal? What is a digital circuits?
Digital signal is the signal amplitude is a discrete value, the amplitude that is limited to 0 and 1 values within the two limited, signal processing and control circuit that the West is called digital circuits
45, what is the analog signal, what is the analog circuit?
Analog signal is the amplitude of the signal in time, the value is continuous; processing and control circuit of this signal is called analog circuit
46, what is the PCI slot
PCI slot is based on the PCI local bus (PEDPHERD component interconnect, peripheral component interconnect) expansion slot.
Motherboard PCI slot is a major expansion slot, expansion cards through the plug can get different computer can now achieve almost all external functions:
47, what is the AGP slot
Accelerated graphics interface. AGP is an interface specification, you can use 3D graphics in an ordinary personal computer faster display. AGP is designed to faster and more stable transmission of 3D graphics interface. He uses ordinary personal computer's main memory to refresh the image display, support for texture mapping, such as zero-buffer and mixed Alpha 3D graphics technology.
48, what is GPRS, what is GSM? What is CDMA?
Through the packet radio service GPRS (General Packet Radiosrvice), is developed on the existing GSM system, a new carrier services, mainly for radio communications;
GSM is the European Committee for Standardization in 1992 with the introduction of the "Global System For Mobile Communication" standard (Global System for Mobile Communications) stands for
It uses digital communication technology, a unified network standards, so that communication quality can be guaranteed, and can develop more new services to provide users.
Code divided to address (CODE DIVISION MULTIPLE ACCess): spread spectrum technology based on a new and sophisticated wireless communications technology.
49, GPRS technology on display useful there?
GPRS-based mobile communications data network, the LED display our data through the GPRS data communication transceiver module can be remotely the point of a small amount of remote data transmission, to achieve the purpose of the remote control;
What is a USB interface, 50
USB is the abbreviation UNIVERSAL SERIALBUS, translated into Chinese is: Universal Serial Bus:. Also known as Universal serial interface, it supports hot swap, can connect up to 127 PC peripheral equipment: There are two kinds of interface standard USB1.0 and USB2.0.
Supplementary information
1, LED display Category
Divided according to installation environment: indoor LED display, semi-outdoor LED display, outdoor LED display;
Second, according to the color sub: single color LED display, two-color LED display, full-color LED display, pseudo-color LED display.
Third, Chinese characters are 16 10.4 inch VGA Monitor* 16 (the smallest unit) matrix. Four modules that can display a character.
4, indoor LED display components: Module → → → LED display panel unit
Border →
5, outdoor LED displays LED constitute a single light box → → → → Module
→ packages →
→ LED display
6, LED display installation,
Ⅱ, Product Terms
1 What is LED
LED is the abbreviation LED (LIGHT EMITTING DIODE), said LED display industry, the visible light range can be issued Tezhi LED
2, What is pixel
10.4 inch Monitor
The minimum luminous LED display units, computer monitors have said the same general meaning of the same pixel
3 What is the pixel pitch (dot pitch)
Between two adjacent pixels in the center distance;
4 What is the LED display module
Shown by the number of pixels composed of structural independence, to form the smallest unit LED display. A typical 8 * 8,8 * 7, etc.
5 What is DIP
DIP is DOUBLE IN-LINE PACKAGE acronym DIP assembly
6 What is SMT? What is SMD?
SMT is Surface Mount Technology (SURFACE MOUNTED technology acronym), is the electronics assembly industry's most popular form of technology and process;
SMD is a SMD (surface mounted device abbreviation)
7, What is the LED display module
A circuit and installation of structures identified with display capabilities, achieved through a simple assembling the basic unit of display functions
8, What is the LED display
Some control by way of LED device array formed by the display screen;
9 What is the plug lamp module, what the strengths and weaknesses?
Refers to the DIP package, the light will light foot through the PCB, by soldering the tin filled hole in the lamp, made of this technology by the modules is plug light touch group, the advantages are: high brightness, good heat dissipation, disadvantage is pixel density.
10: What is a surface mount module? Strengths and weaknesses?
SMD also called SMT, the SMT package light by welding in the surface of the PCB board, not through the PCB board light feet, made of modules by this process is called surface mount module, the advantages are: effects, good pixel density, suitable for indoor viewing: drawback is that brightness is not high enough, heat lamp itself is not good enough.
11, what is the sub-surface mount module? Strengths and weaknesses?
Asia between DIP and Surface Mount is a product between the SMT, the LED lamps and SMT packaging, like the surface, but its positive and negative pin and DIP the same level, production is through the PCB to solder, and its advantages are: high brightness, effects, good and disadvantages are: complex process, difficult to maintain;
12, what is the 3-one? What are the advantages and disadvantages?
Refers to three different colors RGB LED Lamp SMT chip package vertical spacing in accordance with certain juxtaposition, so all in all not only have the three advantages of unity, but also solve the three-in-various disadvantages: complex process, difficult to maintain .
13 What is three and a
Is the RGB SMT package of three independent light vertical spacing in accordance with certain juxtaposition, so not only has all the advantages of 3-one, but also to solve the shortcomings of three-in:
14, what is the two-color, pseudo color, full-color display
Through the different colors of light-emitting diodes to form a different screen, double color is red, green or yellow and green colors of the two pseudo-color is red, green, blue, composed of three different colors, full color is red , pure green, blue composed of three different colors.
15: What is the brightness
LED display unit area emitted light intensity, the unit is the CD / square meter, a simple screen that is issued by a square light intensity;
16: What is the brightness level? Full screen brightness to maximum brightness in the bottom of the manual or automatic adjustment between the series.
17, what is the gray level
In the same brightness level, the display from the darkest to the brightest technical processing between the series
18, what is the maximum brightness
Under certain environmental illumination, LED display every color in the maximum brightness and maximum gray level of time;
19, What is PCB
PCB is the (printed circuit board the abbreviation) printed circuit board
20 What is a BOM
BOM is the (bill of material for short) bill of materials
21: What is white balance, what is the white balance adjustment
We are talking about white balance, white balance means that the ratio of the brightness of RGB three colors balanced; RGB three colors, the brightness ratio and white coordinate regulation, known as white balance adjustment;
22: What is the contrast
Under certain environmental illumination, LED display maximum brightness and background brightness ratio.
23, what is the color temperature
The color of light emission and blackbody radiation at a temperature of light hue also known as the blackbody temperature of light source color temperature.
What is the frame frequency of 24
Unit time the number of display screen information is updated;
25, what is the refresh rate
Display screen in the unit time is the number of times repeated;
26: What is the perspective? What is the viewing angle? What is the best view?
Perspective is to observe the direction of the LED display brightness down to normal brightness of 1 / 2. Two observations with a plane normal direction as the direction and angle. Divided into horizontal and vertical viewing angles;
Viewing angle is just content to see the direction of the image on the screen, and into the corner of the screen normal.
The best perspective is to just to see the contents of the screen, and not flat color, the images in the most clear direction and become normal by the angle;
27: What is the best line of sight?
Is able to complete just to see the contents of the screen, and not flat color, the images in the most clear position relative to the vertical distance matrix screen:
28: What is the control point? Several hours!
LED status and control requirements of the pixels do not match, control points are divided into: the blind spot (also known as dead), often bright (or dark points) Flash point of three;
29, what is the static drive:? What is a scan driver? What is the difference between the two?
The output from the driver IC pin to the pixels between the implementation of "point" of control is called the static drive, from the driver IC output pin to the pixels between the implementation of "points out" the control is called the scan driver, he needs to line control circuit : From the driver board can be clearly seen: the static drivers do not need to line control circuit, the high cost of education, but the effects, good, good stability, brightness and small loss of education; scan driver it needs to line control circuits, low-cost , showed poor results, brightness and large loss of education;
30, what is the constant current driver? What is a constant drive?
Constant current driver IC is allowed to work in the environment, the design provides a constant output current value: constant is in the driver IC to allow the work environment, the constant output voltage under design;
31, what is the nonlinear correction?
If the computer output of digital signal without correction of the show will appear in the LED display on the color distortion, so the system control circuit, the original computer output signal through a nonlinear function of quantified signals required display , as between before and after the signal is linear, so we often call it non-linear correction.
32 What is the rated voltage? What is the voltage? What is the supply voltage?
Rated working voltage refers to voltage of the normal working voltage; working voltage refers to the electrical voltage in the rated range, the normal working voltage values: supply voltage sub-exchange and tributaries supply voltage, AC power realities of our voltage are AC220V --- 240V, DC 5V DC12V supply voltage are generally 12V solar power are generally
33, What is the color distortion? Refers to an object in nature and with the monitor display, both for the human eye the difference between the visual senses.
34: What is a synchronous system, what is the asynchronous system?
Synchronous and asynchronous relative to the computer said, the so-called synchronous system, is shown in the contents of the screen and computer monitor simultaneously display LED display control system; asynchronous system means that the computer edited display data stored in advance In the display control system, the computer shutdown will not affect the normal LED display shows that the control system is asynchronous control systems
35 What is a blind spot detection technology
Through the host software and underlying hardware, can display a blind spot (LED open circuit and short circuit) detected, and the formation of the report told the LED screen manager, so a technique called blind-spot detection technology;
36, what is the power detection
Through the host software and underlying hardware, can display on the work of the various power supply detected, and make reports to tell LED Screen managers, such a technology called Power Detection
37, what is the brightness detection? What is the brightness adjustment?
Brightness detection LED display brightness is the brightness of the host environment, through optical sensor, will display at the current ambient light detected, this detection method is called light detection; brightness adjustment is the brightness of said LED display issued to the brightness of the detected data feedback to the LED display control system or control computer, and then adjust the brightness of the display of data, called the brightness adjustment;
38 What is the actual pixels? What is a virtual pixels? The types of virtual sub-pixels? What is a pixel to share?
Real-pixel screen is the physical pixel count and the actual display is a 1:1 relationship between the pixels, the display the actual number of points, how many points can only display the image information.
Virtual pixel refers to the physical pixel count and display the actual display pixel points 1: N (N = 2,4) relationship, it can display the actual image pixels than screen pixels, or more than 2 times 4 times;
Virtual pixel can be divided into according to the virtual: virtual and hardware virtualization software: In accordance with multiple relations is divided into 2 times and 4 times the virtual virtual, according to a row of lights on the way modules are divided into: 1R1G1B 2R1G1B virtual and virtual;
39, what is the remote control? Under what circumstances to use?
Distance is not necessarily the so-called 10.4 inch LCDlong-distance. Remote control including control of the master controller and is a LAN side, but space is not far away; and the main controller and the controlled-side in distant space distance of two, the customer request or under the control position beyond the fiber directly to customers control the distance, then use the remote control;
40 What is a fiber optic transmission? What is a cable transmission?
Signal optical fiber transmission is replaced by optical signal transmission using a transparent glass fiber, cable transmission is the use of metal wire transfer signals directly.
41, the circumstances under which cable to use? Fiber under what circumstances?
When the computer display and control wiring distance is less than 100 meters, with a cable transmission; when the distance between them is less than 500 meters over 100 meters with multimode fiber, 10.4 inch LCD monitorwhile distances greater than 500 meters or more, with single-mode fiber.
42 What is a LAN control? What is the Internet control?
Within the LAN in a computer controlled by another computer or connect to other external devices, this control method is called local area network control, the host controller is controller through the INTERNET network IP address, to control purposes, known as the Internet control;
43 What is DVI? What is VGA?
DVI stands for Digital Video interface is that the digital video interface. It is now internationally used a digital video signal interface.
44 What is a digital signal? What is a digital circuits?
Digital signal is the signal amplitude is a discrete value, the amplitude that is limited to 0 and 1 values within the two limited, signal processing and control circuit that the West is called digital circuits
45, what is the analog signal, what is the analog circuit?
Analog signal is the amplitude of the signal in time, the value is continuous; processing and control circuit of this signal is called analog circuit
46, what is the PCI slot
PCI slot is based on the PCI local bus (PEDPHERD component interconnect, peripheral component interconnect) expansion slot.
Motherboard PCI slot is a major expansion slot, expansion cards through the plug can get different computer can now achieve almost all external functions:
47, what is the AGP slot
Accelerated graphics interface. AGP is an interface specification, you can use 3D graphics in an ordinary personal computer faster display. AGP is designed to faster and more stable transmission of 3D graphics interface. He uses ordinary personal computer's main memory to refresh the image display, support for texture mapping, such as zero-buffer and mixed Alpha 3D graphics technology.
48, what is GPRS, what is GSM? What is CDMA?
Through the packet radio service GPRS (General Packet Radiosrvice), is developed on the existing GSM system, a new carrier services, mainly for radio communications;
GSM is the European Committee for Standardization in 1992 with the introduction of the "Global System For Mobile Communication" standard (Global System for Mobile Communications) stands for
It uses digital communication technology, a unified network standards, so that communication quality can be guaranteed, and can develop more new services to provide users.
Code divided to address (CODE DIVISION MULTIPLE ACCess): spread spectrum technology based on a new and sophisticated wireless communications technology.
49, GPRS technology on display useful there?
GPRS-based mobile communications data network, the LED display our data through the GPRS data communication transceiver module can be remotely the point of a small amount of remote data transmission, to achieve the purpose of the remote control;
What is a USB interface, 50
USB is the abbreviation UNIVERSAL SERIALBUS, translated into Chinese is: Universal Serial Bus:. Also known as Universal serial interface, it supports hot swap, can connect up to 127 PC peripheral equipment: There are two kinds of interface standard USB1.0 and USB2.0.
Supplementary information
1, LED display Category
Divided according to installation environment: indoor LED display, semi-outdoor LED display, outdoor LED display;
Second, according to the color sub: single color LED display, two-color LED display, full-color LED display, pseudo-color LED display.
Third, Chinese characters are 16 10.4 inch VGA Monitor* 16 (the smallest unit) matrix. Four modules that can display a character.
4, indoor LED display components: Module → → → LED display panel unit
Border →
5, outdoor LED displays LED constitute a single light box → → → → Module
→ packages →
→ LED display
6, LED display installation,
বুধবার, ৯ জুন, ২০১০
Just do LED display sales, would like to know the direction from which to understand the industry,
To clearly understand the customers to do indoor or outdoor LED display? Full color can be used to broadcast television, DVD: color screen can display the general picture, but the effect was not good.,LCD flat Monitor Mainly text-based monochrome screens. Full color display, full-screen points minimum requirement of 5 million or more. Display area so decided to use the model?
Ⅱ, Product Terms
1 What is LED
LED is the abbreviation LED (LIGHT EMITTING DIODE), said LED display industry, the visible light range can be issued Tezhi LED
2, What is pixel
The minimum luminous LED display units, computer monitors have said the same general meaning of the same pixel
3 What is the pixel pitch (dot pitch)
Between two adjacent pixels in the center distance;
4 What is the LED display module
Shown by the number of pixels composed of structural independence, to form the smallest unit LED display. A typical 8 * 8,8 * 7, etc.
5 What is DIP
DIP is DOUBLE IN-LINE PACKAGE acronym DIP assembly
6 What is SMT? What is SMD?
SMT is Surface Mount Technology (SURFACE MOUNTED technology acronym), is the electronics assembly industry's most popular form of technology and process;
SMD is a SMD (surface mounted device abbreviation)
7, What is the LED display module
A circuit and installation of structures identified with display capabilities, achieved through a simple assembling the basic unit of display functions
8, What is the LED display
Some control by way of LED device array formed by the display screen;
9 What is the plug lamp module, what the strengths and weaknesses?
Refers to the DIP package
<
7 inch Monitors
the light will light foot through the PCB, by soldering the tin filled hole in the lamp, made of this technology by the modules is plug light touch group, the advantages are: high brightness, good heat dissipation, disadvantage is pixel density.
10: What is a surface mount module? Strengths and weaknesses?
SMD also called SMT, the SMT package light by welding in the surface of the PCB board, not through the PCB board light feet, made of modules by this process is called surface mount module, the advantages are: effects, good pixel density, suitable for indoor viewing: drawback is that brightness is not high enough, heat lamp itself is not good enough.
11, what is the sub-surface mount module? Strengths and weaknesses?
Asia between DIP and Surface Mount is a product between the SMT, the LED lamps and SMT packaging, like the surface, but its positive and negative pin and DIP the same level, production is through the PCB to 7 inch VGA Monitorsolder, and its advantages are: high brightness, effects, good and disadvantages are: complex process, difficult to maintain;
12, what is the 3-one? What are the advantages and disadvantages?
Refers to three different colors RGB LED Lamp SMT chip package vertical spacing in accordance with certain juxtaposition, so all in all not only have the three advantages of unity, but also solve the three-in-various disadvantages: complex process, difficult to maintain .
13 What is three and a
Is the RGB SMT package of three independent light vertical spacing in accordance with certain juxtaposition, so not only has all the advantages of 3-one, but also to solve the shortcomings of three-in:
14, what is the two-color, pseudo color, full-color display
Through the different colors of light-emitting diodes to form a different screen, double color is red, green or yellow and green colors of the two pseudo-color is red, green, blue, composed of three different colors, full color is red , pure green, blue composed of three different colors.
15: What is the brightness
LED display unit area emitted light intensity, the unit is the CD / square meter, a simple screen that is issued by a square light intensity;
16: What is the brightness level? Full screen brightness to maximum brightness in the bottom of the manual or automatic adjustment between the series.
17, what is the gray level
In the same brightness level, the display from the darkest to the brightest technical processing between the series
18, what is the maximum brightness
Under certain environmental illumination, LED display every color in the maximum brightness and maximum gray level of time;
19, What is PCB
PCB is the (printed circuit board the abbreviation) printed circuit board
20 What is a BOM
BOM is the (bill of material for short) bill of materials
21: What is white balance, what is the white balance adjustment
We are talking about white balance, white balance means that the ratio of the brightness of RGB three colors balanced; RGB three colors, the brightness ratio and white coordinate regulation, known as white balance adjustment;
22: What is the contrast
Under certain environmental illumination, LED display maximum brightness and background brightness ratio.
23, what is the color temperature
The color of light emission and blackbody radiation at a temperature of light hue also known as the blackbody temperature of light source color temperature.
What is the frame frequency of 24
Unit time the number of display screen information is updated;
25, what is the refresh rate
Display screen in the unit time is the number of times repeated;
26: What is the perspective? What is the viewing angle? What is the best view?
Perspective is to observeTFT Monitor
the direction of the LED display brightness down to normal brightness of 1 / 2. Two observations with a plane normal direction as the direction and angle. Divided into horizontal and vertical viewing angles;
Viewing angle is just content to see the direction of the image on the screen, and into the corner of the screen normal.
The best perspective is to just to see the contents of the screen, and not flat color, the images in the most clear direction and become normal by the angle;
27: What is the best line of sight?
Is able to complete just to see the contents of the screen, and not flat color, the images in the most clear position relative to the vertical distance matrix screen:
28: What is the control point? Several hours!
LED status and control requirements of the pixels do not match, control points are divided into: the blind spot (also known as dead),7 inch LCD Monitor
often bright (or dark points) Flash point of three;
29, what is the static drive:? What is a scan driver? What is the difference between the two?
The output from the driver IC pin to the pixels between the implementation of "point" of control is called the static drive, from the driver IC output pin to the pixels between the implementation of "points out" the control is called the scan driver, he needs to line control circuit : From the driver board can be clearly seen: the static drivers do not need to line control circuit, the high cost of education, but the effects, good, good stability, brightness and small loss of education; scan driver it needs to line control circuits, low-cost , showed poor results, brightness and large loss of education;
30, what is the constant current driver? What is a constant drive?
Constant current driver IC is allowed to work in the environment, the design provides a constant output current LCD flat Panel Monitor
value: constant is in the driver IC to allow the work environment, the constant output voltage under design;
31, what is the nonlinear correction?
If the computer output of digital signal without correction of the show will appear in the LED display on the color distortion, so the system control circuit, the original computer output signal through a nonlinear function of quantified signals required display , as between before and after the signal is linear, so we often call it non-linear correction.
32 What is the rated voltage? What is the voltage? What is the supply voltage?
Rated working voltage refers to voltage of the normal working voltage; working voltage refers to the electrical voltage in the rated range, the normal working voltage values: supply voltage sub-exchange and tributaries supply voltage, AC power realities of our voltage are AC220V --- 240V, DC 5V DC12V supply voltage are generally 12V solar power are generally
33, What is the color distortion? Refers to an object in nature and with the monitor display, both for the human eye the difference between the visual senses.
34: What is a synchronous system, what is the asynchronous system?
Synchronous and asynchronous relative to the computer said, the so-called synchronous system, is shown in the contents of the screen and computer monitor simultaneously display LED display control system; asynchronous system means that the computer edited display data stored in advance In the display control system, the computer shutdown will not affect the normal LED display shows 7 inch LCD Monitorsthat the control system is asynchronous control systems
35 What is a blind spot detection technology
Through the host software and underlying hardware, can display a blind spot (LED open circuit and short circuit) detected, and the formation of the report told the LED screen manager, so a technique called blind-spot detection technology;
36, what is the power detection
Through the host software and underlying hardware, can display on the work of the various power supply detected, and make reports to tell LED Screen managers, such a technology called Power Detection
37, what is the brightness detection? What is the brightness adjustment?
Brightness detection LED display brightness is the brightness of the host environment, through optical sensor, will display at the current ambient light detected, this detection method is called light detection; brightness adjustment is the brightness of said LED display issued to the brightness of the detected data feedback to the LED display control system or control computer, and then adjust the brightness of the display of data, called the brightness adjustment;
38 What is the actual pixels? What is a virtual pixels? The types of virtual sub-pixels? What is a pixel to share?
Real-pixel screen is the physical pixel count and the actual display is a 1:1 relationship between the pixels, the display the actual number of points, how many points can only display the image information.
Virtual pixel refers to the physical pixel count and display the actual display pixel points 1: N (N = 2,4) relationship, it can display the actual image pixels than screen pixels, or more than 2 times 4 times;
Virtual pixel can be divided into according to the virtual: virtual and hardware virtualization software: In accordance with multiple relations is divided into 2 times and 4 times the virtual virtual, according to a row of lights on the way modules are divided into: 1R1G1B 2R1G1B virtual and virtual;
39, what is the remote control? Under what circumstances to use?
Distance is not necessarily the so-called long-distance. Remote control including control of the master controller and is a LAN side, but space is not far away; and the main controller and the controlled-side in distant space distance of two, the customer request or under the control position beyond the fiber directly to customers control the distance, then use the remote control;
40 What is a fiber optic transmission? What is a cable transmission?
Signal optical fiber transmission is replaced by optical signal transmission using a transparent glass fiber, cable transmission is the use of metal wire transfer signals directly.
41, the circumstances under which cable to use? Fiber under what circumstances?
When the computer display and control7 inch LCD monitor wiring distance is less than 100 meters, with a cable transmission; when the distance between them is less than 500 meters over 100 meters with multimode fiber, while distances greater than 500 meters or more, with single-mode fiber.
42 What is a LAN control? What is the Internet control?
Within the LAN in a computer controlled by another computer or connect to other external devices, this control method is called local area network control, the host controller is controller through the INTERNET network IP address, to control purposes, known as the Internet control;
43 What is DVI? What is VGA?
DVI stands for Digital Video interface is that the digital video interface. It is now internationally used a digital video signal interface.
44 What is a digital signal? What is a digital circuits?
Digital signal is the signal amplitude is a discrete value, the amplitude that is limited to 0 and 1 values within the two limited, signal processing and control circuit that the West is called digital circuits
45, what is the analog signal, what is the analog circuit?
Analog signal is the amplitude of the signal in time, the value is continuous; processing and control circuit of this signal is called analog circuit
46, what is the PCI slot
PCI slot is based on the PCI local bus (PEDPHERD component interconnect, peripheral component interconnect) expansion slot.
Motherboard PCI slot is a major expansion slot, expansion cards through the plug can get different computer can now achieve almost all external functions:
47, what is the AGP slot
Accelerated graphics interface. AGP is an interface specification, you can use 3D graphics in an ordinary personal computer faster display. AGP is designed to faster and more stable transmission of 3D graphics interface. He uses ordinary personal computer's main memory to refresh the image display, support for texture mapping, such as zero-buffer and mixed Alpha 3D graphics technology.
48, what is GPRS, what is GSM? What is CDMA?
Through the packet radio service GPRS (General Packet Radiosrvice), is developed on the existing GSM system, a new carrier services, mainly for radio communications;
GSM is the European Committee for Standardization in 1992 with the introduction of the "Global System For Mobile
7 inch PC monitor
Communication" standard (Global System for Mobile Communications) stands for
It uses digital communication technology, a unified network standards, so that communication quality can be guaranteed, and can develop more new services to provide users.
Code divided to address (CODE DIVISION MULTIPLE ACCess): spread spectrum technology based on a new and sophisticated wireless communications technology.
49, GPRS technology on display useful there?
GPRS-based mobile communications data network, the LED display our data through the GPRS data communication transceiver module can be remotely the point of a small amount of remote data transmission, to achieve the purpose of the remote control;
What is a USB interface, 50
USB is the abbreviation UNIVERSAL SERIALBUS, translated into Chinese is: Universal Serial Bus:. Also known as Universal serial interface, it supports hot swap, can connect up to 127 PC peripheral equipment: There are two kinds of interface standard USB1.0 and USB2.0.
Supplementary information
1, LED display Category
Divided according to installation environment: indoor LED display, semi-outdoor LED display, outdoor LED display;
Second, according to the color sub: single color LED display, two-color LED display, full-color LED display, pseudo-color LED display.
Third, Chinese characters are 16 * 16 (the smallest unit) matrix. Four modules that can display a character.
4, indoor LED display components: Module → → → LED display panel unit
Border →
5, outdoor LED displays LED7 inch TFT LCD Monitor constitute a single light box → → → → Module
→ packages →
→ LED display
6, LED display installation,
Ⅱ, Product Terms
1 What is LED
LED is the abbreviation LED (LIGHT EMITTING DIODE), said LED display industry, the visible light range can be issued Tezhi LED
2, What is pixel
The minimum luminous LED display units, computer monitors have said the same general meaning of the same pixel
3 What is the pixel pitch (dot pitch)
Between two adjacent pixels in the center distance;
4 What is the LED display module
Shown by the number of pixels composed of structural independence, to form the smallest unit LED display. A typical 8 * 8,8 * 7, etc.
5 What is DIP
DIP is DOUBLE IN-LINE PACKAGE acronym DIP assembly
6 What is SMT? What is SMD?
SMT is Surface Mount Technology (SURFACE MOUNTED technology acronym), is the electronics assembly industry's most popular form of technology and process;
SMD is a SMD (surface mounted device abbreviation)
7, What is the LED display module
A circuit and installation of structures identified with display capabilities, achieved through a simple assembling the basic unit of display functions
8, What is the LED display
Some control by way of LED device array formed by the display screen;
9 What is the plug lamp module, what the strengths and weaknesses?
Refers to the DIP package
<
7 inch Monitors
the light will light foot through the PCB, by soldering the tin filled hole in the lamp, made of this technology by the modules is plug light touch group, the advantages are: high brightness, good heat dissipation, disadvantage is pixel density.
10: What is a surface mount module? Strengths and weaknesses?
SMD also called SMT, the SMT package light by welding in the surface of the PCB board, not through the PCB board light feet, made of modules by this process is called surface mount module, the advantages are: effects, good pixel density, suitable for indoor viewing: drawback is that brightness is not high enough, heat lamp itself is not good enough.
11, what is the sub-surface mount module? Strengths and weaknesses?
Asia between DIP and Surface Mount is a product between the SMT, the LED lamps and SMT packaging, like the surface, but its positive and negative pin and DIP the same level, production is through the PCB to 7 inch VGA Monitorsolder, and its advantages are: high brightness, effects, good and disadvantages are: complex process, difficult to maintain;
12, what is the 3-one? What are the advantages and disadvantages?
Refers to three different colors RGB LED Lamp SMT chip package vertical spacing in accordance with certain juxtaposition, so all in all not only have the three advantages of unity, but also solve the three-in-various disadvantages: complex process, difficult to maintain .
13 What is three and a
Is the RGB SMT package of three independent light vertical spacing in accordance with certain juxtaposition, so not only has all the advantages of 3-one, but also to solve the shortcomings of three-in:
14, what is the two-color, pseudo color, full-color display
Through the different colors of light-emitting diodes to form a different screen, double color is red, green or yellow and green colors of the two pseudo-color is red, green, blue, composed of three different colors, full color is red , pure green, blue composed of three different colors.
15: What is the brightness
LED display unit area emitted light intensity, the unit is the CD / square meter, a simple screen that is issued by a square light intensity;
16: What is the brightness level? Full screen brightness to maximum brightness in the bottom of the manual or automatic adjustment between the series.
17, what is the gray level
In the same brightness level, the display from the darkest to the brightest technical processing between the series
18, what is the maximum brightness
Under certain environmental illumination, LED display every color in the maximum brightness and maximum gray level of time;
19, What is PCB
PCB is the (printed circuit board the abbreviation) printed circuit board
20 What is a BOM
BOM is the (bill of material for short) bill of materials
21: What is white balance, what is the white balance adjustment
We are talking about white balance, white balance means that the ratio of the brightness of RGB three colors balanced; RGB three colors, the brightness ratio and white coordinate regulation, known as white balance adjustment;
22: What is the contrast
Under certain environmental illumination, LED display maximum brightness and background brightness ratio.
23, what is the color temperature
The color of light emission and blackbody radiation at a temperature of light hue also known as the blackbody temperature of light source color temperature.
What is the frame frequency of 24
Unit time the number of display screen information is updated;
25, what is the refresh rate
Display screen in the unit time is the number of times repeated;
26: What is the perspective? What is the viewing angle? What is the best view?
Perspective is to observeTFT Monitor
the direction of the LED display brightness down to normal brightness of 1 / 2. Two observations with a plane normal direction as the direction and angle. Divided into horizontal and vertical viewing angles;
Viewing angle is just content to see the direction of the image on the screen, and into the corner of the screen normal.
The best perspective is to just to see the contents of the screen, and not flat color, the images in the most clear direction and become normal by the angle;
27: What is the best line of sight?
Is able to complete just to see the contents of the screen, and not flat color, the images in the most clear position relative to the vertical distance matrix screen:
28: What is the control point? Several hours!
LED status and control requirements of the pixels do not match, control points are divided into: the blind spot (also known as dead),7 inch LCD Monitor
often bright (or dark points) Flash point of three;
29, what is the static drive:? What is a scan driver? What is the difference between the two?
The output from the driver IC pin to the pixels between the implementation of "point" of control is called the static drive, from the driver IC output pin to the pixels between the implementation of "points out" the control is called the scan driver, he needs to line control circuit : From the driver board can be clearly seen: the static drivers do not need to line control circuit, the high cost of education, but the effects, good, good stability, brightness and small loss of education; scan driver it needs to line control circuits, low-cost , showed poor results, brightness and large loss of education;
30, what is the constant current driver? What is a constant drive?
Constant current driver IC is allowed to work in the environment, the design provides a constant output current LCD flat Panel Monitor
value: constant is in the driver IC to allow the work environment, the constant output voltage under design;
31, what is the nonlinear correction?
If the computer output of digital signal without correction of the show will appear in the LED display on the color distortion, so the system control circuit, the original computer output signal through a nonlinear function of quantified signals required display , as between before and after the signal is linear, so we often call it non-linear correction.
32 What is the rated voltage? What is the voltage? What is the supply voltage?
Rated working voltage refers to voltage of the normal working voltage; working voltage refers to the electrical voltage in the rated range, the normal working voltage values: supply voltage sub-exchange and tributaries supply voltage, AC power realities of our voltage are AC220V --- 240V, DC 5V DC12V supply voltage are generally 12V solar power are generally
33, What is the color distortion? Refers to an object in nature and with the monitor display, both for the human eye the difference between the visual senses.
34: What is a synchronous system, what is the asynchronous system?
Synchronous and asynchronous relative to the computer said, the so-called synchronous system, is shown in the contents of the screen and computer monitor simultaneously display LED display control system; asynchronous system means that the computer edited display data stored in advance In the display control system, the computer shutdown will not affect the normal LED display shows 7 inch LCD Monitorsthat the control system is asynchronous control systems
35 What is a blind spot detection technology
Through the host software and underlying hardware, can display a blind spot (LED open circuit and short circuit) detected, and the formation of the report told the LED screen manager, so a technique called blind-spot detection technology;
36, what is the power detection
Through the host software and underlying hardware, can display on the work of the various power supply detected, and make reports to tell LED Screen managers, such a technology called Power Detection
37, what is the brightness detection? What is the brightness adjustment?
Brightness detection LED display brightness is the brightness of the host environment, through optical sensor, will display at the current ambient light detected, this detection method is called light detection; brightness adjustment is the brightness of said LED display issued to the brightness of the detected data feedback to the LED display control system or control computer, and then adjust the brightness of the display of data, called the brightness adjustment;
38 What is the actual pixels? What is a virtual pixels? The types of virtual sub-pixels? What is a pixel to share?
Real-pixel screen is the physical pixel count and the actual display is a 1:1 relationship between the pixels, the display the actual number of points, how many points can only display the image information.
Virtual pixel refers to the physical pixel count and display the actual display pixel points 1: N (N = 2,4) relationship, it can display the actual image pixels than screen pixels, or more than 2 times 4 times;
Virtual pixel can be divided into according to the virtual: virtual and hardware virtualization software: In accordance with multiple relations is divided into 2 times and 4 times the virtual virtual, according to a row of lights on the way modules are divided into: 1R1G1B 2R1G1B virtual and virtual;
39, what is the remote control? Under what circumstances to use?
Distance is not necessarily the so-called long-distance. Remote control including control of the master controller and is a LAN side, but space is not far away; and the main controller and the controlled-side in distant space distance of two, the customer request or under the control position beyond the fiber directly to customers control the distance, then use the remote control;
40 What is a fiber optic transmission? What is a cable transmission?
Signal optical fiber transmission is replaced by optical signal transmission using a transparent glass fiber, cable transmission is the use of metal wire transfer signals directly.
41, the circumstances under which cable to use? Fiber under what circumstances?
When the computer display and control7 inch LCD monitor wiring distance is less than 100 meters, with a cable transmission; when the distance between them is less than 500 meters over 100 meters with multimode fiber, while distances greater than 500 meters or more, with single-mode fiber.
42 What is a LAN control? What is the Internet control?
Within the LAN in a computer controlled by another computer or connect to other external devices, this control method is called local area network control, the host controller is controller through the INTERNET network IP address, to control purposes, known as the Internet control;
43 What is DVI? What is VGA?
DVI stands for Digital Video interface is that the digital video interface. It is now internationally used a digital video signal interface.
44 What is a digital signal? What is a digital circuits?
Digital signal is the signal amplitude is a discrete value, the amplitude that is limited to 0 and 1 values within the two limited, signal processing and control circuit that the West is called digital circuits
45, what is the analog signal, what is the analog circuit?
Analog signal is the amplitude of the signal in time, the value is continuous; processing and control circuit of this signal is called analog circuit
46, what is the PCI slot
PCI slot is based on the PCI local bus (PEDPHERD component interconnect, peripheral component interconnect) expansion slot.
Motherboard PCI slot is a major expansion slot, expansion cards through the plug can get different computer can now achieve almost all external functions:
47, what is the AGP slot
Accelerated graphics interface. AGP is an interface specification, you can use 3D graphics in an ordinary personal computer faster display. AGP is designed to faster and more stable transmission of 3D graphics interface. He uses ordinary personal computer's main memory to refresh the image display, support for texture mapping, such as zero-buffer and mixed Alpha 3D graphics technology.
48, what is GPRS, what is GSM? What is CDMA?
Through the packet radio service GPRS (General Packet Radiosrvice), is developed on the existing GSM system, a new carrier services, mainly for radio communications;
GSM is the European Committee for Standardization in 1992 with the introduction of the "Global System For Mobile
7 inch PC monitor
Communication" standard (Global System for Mobile Communications) stands for
It uses digital communication technology, a unified network standards, so that communication quality can be guaranteed, and can develop more new services to provide users.
Code divided to address (CODE DIVISION MULTIPLE ACCess): spread spectrum technology based on a new and sophisticated wireless communications technology.
49, GPRS technology on display useful there?
GPRS-based mobile communications data network, the LED display our data through the GPRS data communication transceiver module can be remotely the point of a small amount of remote data transmission, to achieve the purpose of the remote control;
What is a USB interface, 50
USB is the abbreviation UNIVERSAL SERIALBUS, translated into Chinese is: Universal Serial Bus:. Also known as Universal serial interface, it supports hot swap, can connect up to 127 PC peripheral equipment: There are two kinds of interface standard USB1.0 and USB2.0.
Supplementary information
1, LED display Category
Divided according to installation environment: indoor LED display, semi-outdoor LED display, outdoor LED display;
Second, according to the color sub: single color LED display, two-color LED display, full-color LED display, pseudo-color LED display.
Third, Chinese characters are 16 * 16 (the smallest unit) matrix. Four modules that can display a character.
4, indoor LED display components: Module → → → LED display panel unit
Border →
5, outdoor LED displays LED7 inch TFT LCD Monitor constitute a single light box → → → → Module
→ packages →
→ LED display
6, LED display installation,
LED display which parts mainly composed of
LED display function is how
I. What is LED?
In some semiconductor materials, PN junction, the injection of minority carrier and majority carrier recombination extra time to time to the form of light energy released, which convert light energy directlMonitor
y into electrical energy. PN junction reverse voltage, minority carrier injection is difficult, it is not light. This use of principle of injection electroluminescence diodes called LEDs produced, known as LED.
LED luminous color and light-emitting efficiency and production of LED materials and processes related to the widely used red, green, and blue. As the LED voltage is low (only 1.5-3V), can take the initiative to have a certain luminescence and brightness, Brightness and voltage (or current) regulation, which itself has impact-resistant, anti-vibration, long life (100,000 hours), so in large display device, the display is currently no other way match with LED display.
The red and green LED together produced as a pixel color display screen or a color screen name; the red, green
LCD Panel
and blue LED tube put together as a three-color pixel of the display screen or call Full color. Production of indoor LED screen pixel size is generally 2-10 mm, often used to produce several different color of the LED die into one package, outdoor LED screen pixel size mostly 12-26 mm, each pixel by a number of various color LED, the finished tube, said pixel, two-color pixel 3 red tube generally composed of two green, three-color pixel 2 red 1 green tube with a blue component.
Whether using LED production monochrome, color or tri-color screen pixels to display images need to form the luminance of each LED must be able to adjust the fine adjustment of the degree is the gray scale. The higher the gray level, the more exquisite display of images, color and the more abundant, and the corresponding display control system is also more complex. General 256 gray scale images, color transition has been very soft, while the 16-level grayscale color image, color transition boundaries clear. Therefore, the current color LED screen all requests made of 256 gray scale.
2, LED brightness control method:
There are two methods of controlling LED brightness. One is to change the current flowing through the LED, LED tube to allow the general current of 20 mA continuous work around, in addition to the red LED with saturation, the other LED brightness is basically proportional to the current flowing through; Another way is to use human visual inertia with a pulse width modulation method to achieve gray scale control, which is cyclical changes in pulse width (ie duty cycle), as long as the repeated cycle of light short enough ,LCD(ie the refresh rate high enough), who eye is not feel the trembling of light-emitting pixels. As the pulse width modulation is more suitable for digital control, so in general the use of computer to provide the LED display today, almost all of the LED screen is used to control the pulse width modulated gray levels.
LED control system is usually the master box, scan control unit board and was composed of three parts. Main control box from the computer's graphics card to get a colored screen pixel luminance data, then re-allocated to a number of block scanning plate, each scan control board LED screen for a number of rows (columns), and each row (column) on the LED control signal is an outstanding way to use serial transmission. There are two serial transmission mode display control signals: one is the centralized control panel scan pixel grayscale, scan board will come from the control box of each line of pixel brightness value decomposition (ie, pulse width modulation), then the opening of the line LED signals in pulses (light 1, light = 0) transmitted by serial line to the corresponding LED on the control whether they light up. This use of the device small, but the serial transmission of data volume, because in a repeating cycle of light, each pixel gray level in the 16 required under 16 pulses required under the 256 gray 256 pulses, as the device operating frequency limit, the general can only do 16-level grayscale LED screen.
Another method is to scan the contents of the plate serial transmission is not a signal for each LED in the switch but the brightness of an 8-bit binary value. Each LED has its own pulse width modulator to control the light time. Thus, in a repeating cycle of light, each pixel in 16 gray scales are required, four pulses, 256 only eight pulses under the gray, greatly reduce the serial transmission frequency. LED intensity with this method of decentralized control can be easily controlled with 256 gray scales.
· LED display function Panelis how to achieve
* On the application of environmental and quality LED What are the requirements?
· LED display general specification
* The basic structure of graphics display
* The basic structure of the video LED display
· LED display screen performance comparison with other
* Indoor LED electronic display main technical parameters
I. What is LED?
In some semiconductor materials, PN junction, the injection of minority carrier and majority carrier recombination extra time to time to the form of light energy released, which convert light energy directlMonitor
y into electrical energy. PN junction reverse voltage, minority carrier injection is difficult, it is not light. This use of principle of injection electroluminescence diodes called LEDs produced, known as LED.
LED luminous color and light-emitting efficiency and production of LED materials and processes related to the widely used red, green, and blue. As the LED voltage is low (only 1.5-3V), can take the initiative to have a certain luminescence and brightness, Brightness and voltage (or current) regulation, which itself has impact-resistant, anti-vibration, long life (100,000 hours), so in large display device, the display is currently no other way match with LED display.
The red and green LED together produced as a pixel color display screen or a color screen name; the red, green
LCD Panel
and blue LED tube put together as a three-color pixel of the display screen or call Full color. Production of indoor LED screen pixel size is generally 2-10 mm, often used to produce several different color of the LED die into one package, outdoor LED screen pixel size mostly 12-26 mm, each pixel by a number of various color LED, the finished tube, said pixel, two-color pixel 3 red tube generally composed of two green, three-color pixel 2 red 1 green tube with a blue component.
Whether using LED production monochrome, color or tri-color screen pixels to display images need to form the luminance of each LED must be able to adjust the fine adjustment of the degree is the gray scale. The higher the gray level, the more exquisite display of images, color and the more abundant, and the corresponding display control system is also more complex. General 256 gray scale images, color transition has been very soft, while the 16-level grayscale color image, color transition boundaries clear. Therefore, the current color LED screen all requests made of 256 gray scale.
2, LED brightness control method:
There are two methods of controlling LED brightness. One is to change the current flowing through the LED, LED tube to allow the general current of 20 mA continuous work around, in addition to the red LED with saturation, the other LED brightness is basically proportional to the current flowing through; Another way is to use human visual inertia with a pulse width modulation method to achieve gray scale control, which is cyclical changes in pulse width (ie duty cycle), as long as the repeated cycle of light short enough ,LCD(ie the refresh rate high enough), who eye is not feel the trembling of light-emitting pixels. As the pulse width modulation is more suitable for digital control, so in general the use of computer to provide the LED display today, almost all of the LED screen is used to control the pulse width modulated gray levels.
LED control system is usually the master box, scan control unit board and was composed of three parts. Main control box from the computer's graphics card to get a colored screen pixel luminance data, then re-allocated to a number of block scanning plate, each scan control board LED screen for a number of rows (columns), and each row (column) on the LED control signal is an outstanding way to use serial transmission. There are two serial transmission mode display control signals: one is the centralized control panel scan pixel grayscale, scan board will come from the control box of each line of pixel brightness value decomposition (ie, pulse width modulation), then the opening of the line LED signals in pulses (light 1, light = 0) transmitted by serial line to the corresponding LED on the control whether they light up. This use of the device small, but the serial transmission of data volume, because in a repeating cycle of light, each pixel gray level in the 16 required under 16 pulses required under the 256 gray 256 pulses, as the device operating frequency limit, the general can only do 16-level grayscale LED screen.
Another method is to scan the contents of the plate serial transmission is not a signal for each LED in the switch but the brightness of an 8-bit binary value. Each LED has its own pulse width modulator to control the light time. Thus, in a repeating cycle of light, each pixel in 16 gray scales are required, four pulses, 256 only eight pulses under the gray, greatly reduce the serial transmission frequency. LED intensity with this method of decentralized control can be easily controlled with 256 gray scales.
· LED display function Panelis how to achieve
* On the application of environmental and quality LED What are the requirements?
· LED display general specification
* The basic structure of graphics display
* The basic structure of the video LED display
· LED display screen performance comparison with other
* Indoor LED electronic display main technical parameters
How to make LED display
Do display the original simple
Display consists of: cell board, power supply, control cards, borders, corner, angle aluminum, power cord, data cable, screws, pillars, the nut (cylinder).
1 Connect the red wire to V +,PC monitor V-Connect the black wire, are connected to the control card and the LED module board, black line access control cards and power GND. Red line connection control card and cell board +5 V VCC. Each cell board a power cord. Upon completion of testing with a multimeter to see if correct.
2, net screen measuring body size, the interception of the corresponding frame, and fixed. Generally the length of the border length less than the net screen around 1CM.
3, the corresponding angle of interception of aluminum, and the corresponding location of drill holes with copper pillar (as shown), the angle aluminum fixed copper pillar on the border on both ends fixed.
4, followed by connection cable
According to the whole screen unit to determine the required number of board power, and in turn fixed (COM + V + LN AC)
5, select the appropriate TFT LCD Monitor
range of control cards, matching adapter plate to the left of the input into the cable connected to the adapter plate from top to bottom order of the corresponding pins. (Note interface definition).
6, connect RS232 cable, data cable will do a computer's DB9 serial port to connect the other end to connect control card.
7, re-check connections are correct, the black wire connected to-V and GND. Red line is connected to + V and VCC +5 V, connected to 220V, under normal circumstances, the power light is on, control card bright screen showing. If not, please check connection. Or see the error repair. (Remember: If no assembly experience, or knowledge of electronics, do not rush on the power. Please assemble a small screen, or looking for hand-spot VGA Monitorguidance to avoid burning the screen or control panel to determine the correct plug in the power)
8, if there is no problem, fixed rear cover
Display consists of: cell board, power supply, control cards, borders, corner, angle aluminum, power cord, data cable, screws, pillars, the nut (cylinder).
1 Connect the red wire to V +,PC monitor V-Connect the black wire, are connected to the control card and the LED module board, black line access control cards and power GND. Red line connection control card and cell board +5 V VCC. Each cell board a power cord. Upon completion of testing with a multimeter to see if correct.
2, net screen measuring body size, the interception of the corresponding frame, and fixed. Generally the length of the border length less than the net screen around 1CM.
3, the corresponding angle of interception of aluminum, and the corresponding location of drill holes with copper pillar (as shown), the angle aluminum fixed copper pillar on the border on both ends fixed.
4, followed by connection cable
According to the whole screen unit to determine the required number of board power, and in turn fixed (COM + V + LN AC)
5, select the appropriate TFT LCD Monitor
range of control cards, matching adapter plate to the left of the input into the cable connected to the adapter plate from top to bottom order of the corresponding pins. (Note interface definition).
6, connect RS232 cable, data cable will do a computer's DB9 serial port to connect the other end to connect control card.
7, re-check connections are correct, the black wire connected to-V and GND. Red line is connected to + V and VCC +5 V, connected to 220V, under normal circumstances, the power light is on, control card bright screen showing. If not, please check connection. Or see the error repair. (Remember: If no assembly experience, or knowledge of electronics, do not rush on the power. Please assemble a small screen, or looking for hand-spot VGA Monitorguidance to avoid burning the screen or control panel to determine the correct plug in the power)
8, if there is no problem, fixed rear cover
How to make LED display
Do display the original simple
Display consists of: cell board, power supply, control cards, borders, corner, angle aluminum, power cord, data cable,PC monitor screws, pillars, the nut (cylinder).
1 Connect the red wire to V +, V-Connect the black wire, are connected to the control card and the LED module board, black line access control cards and power GND. Red line connection control card and cell board +5 V VCC. Each cell board a power cord. Upon completion of testing with a multimeter to see if correct.
2, net screen measuring body size, the interception of the corresponding frame, and fixed. Generally the length of the border length less than the net screen around 1CM.
3, the corresponding angle of interception of aluminum, and the corresponding location of drill holes with copper pillar (as shown), the angle aluminum fixed copper pillar on the border on both ends fixed.
4, followed by connection cable
According to the whole screen unit to determine the required number of board power, and in turn fixed (COM + V + LN AC)
5, select the appropriate range of control cards, matching adapter plate to the left of the input into the cable connected to the adapter plate from top to bottom order of the corresponding pins. (Note interface definition).
6, connect RS232 cable, data cable
VGA Monitor
will do a computer's DB9 serial port to connect the other end to connect control card.
7, re-check connections are correct, the black wire connected to-V and GND. Red line is connected to + V and VCC +5 V, connected to 220V, under normal circumstances, the power light is on, control card bright screen showing. If not, please check connection. Or see the error repair. (Remember: If no assembly experience, or knowledge of electronics, do not rush on the power. Please assemble a small screen, or looking for hand-spot guidance to avoid burning the screen or control panel to determine the correct plug TFT LCD Monitorin the power)
8, if there is no problem, fixed rear cover
Display consists of: cell board, power supply, control cards, borders, corner, angle aluminum, power cord, data cable,PC monitor screws, pillars, the nut (cylinder).
1 Connect the red wire to V +, V-Connect the black wire, are connected to the control card and the LED module board, black line access control cards and power GND. Red line connection control card and cell board +5 V VCC. Each cell board a power cord. Upon completion of testing with a multimeter to see if correct.
2, net screen measuring body size, the interception of the corresponding frame, and fixed. Generally the length of the border length less than the net screen around 1CM.
3, the corresponding angle of interception of aluminum, and the corresponding location of drill holes with copper pillar (as shown), the angle aluminum fixed copper pillar on the border on both ends fixed.
4, followed by connection cable
According to the whole screen unit to determine the required number of board power, and in turn fixed (COM + V + LN AC)
5, select the appropriate range of control cards, matching adapter plate to the left of the input into the cable connected to the adapter plate from top to bottom order of the corresponding pins. (Note interface definition).
6, connect RS232 cable, data cable
VGA Monitor
will do a computer's DB9 serial port to connect the other end to connect control card.
7, re-check connections are correct, the black wire connected to-V and GND. Red line is connected to + V and VCC +5 V, connected to 220V, under normal circumstances, the power light is on, control card bright screen showing. If not, please check connection. Or see the error repair. (Remember: If no assembly experience, or knowledge of electronics, do not rush on the power. Please assemble a small screen, or looking for hand-spot guidance to avoid burning the screen or control panel to determine the correct plug TFT LCD Monitorin the power)
8, if there is no problem, fixed rear cover
LED display on the simple knowledge
First: What is the led display?
LED display (LED panel): LED is light emitting diode, light emitting diodes in abbreviation, abbreviated LED. It is a semiconductor light-emitting diode by controlling the display of its appearance is probably many months from the little red light is usually formed by the bright lights off to show character. Used to display text, graphics, images, animations, quotes, video, video signals and other information on the display screen.
Graphic display and LED display into the video display by the LED matrix blocks. Graphic displays can be synchronized with the computer display Chinese characters, English text and graphics; video display using micro computer control, graphic, image, and Mao, real-time, synchronization,,10.4 Inch Touch Screen LCD Monitor clear message to the broadcast transmission of various information, but also shows two dimensional, three-dimensional animation, video, TV, VCD programs and live on. LED display shows the screen brightly colored, three-dimensional sense of strong, static, such as painting, moving as the film is widely used in finance, tax, business, telecommunications, sports, advertising, industrial enterprises, transport, education systems, stations, docks, airports, shopping malls, hospitals, hotels, banks, securities markets, construction market, auction houses, industrial enterprises in management and other public places.
LED display can show changes in the numbers, text, graphics and video; not only can be used in the indoor environment can also be used for outdoor environment, with a projector, TV wall, LCD screen can not match advantage.
LED reason attention has been attached and rapid development, is that it itself has the advantage inseparable. To sum up these advantages are: high brightness, low voltage, power consumption, small size, long life, impact resistance and stable performance. LED's development prospect is extremely broad, the current is moving in a higher brightness, higher weather resistance, higher luminous density, higher luminous uniformity, reliability, full color of direction.
Second: LED display Category:
1, color by color can be divided into
Single-color display: Single color (red or green).
Two-color display: red and green dual-color, 256 gray scale levels, can display 65,536 colors.
Full-color screen: red, green, blue color, 256 grayscale full color display can display more than 16 million kinds of colors.
2, according to display device classification
LED digital display: seven segment display devices for the digital control code, suitable for production of the clock screen, the interest rate screens, showing the number of electronic display.
LED dot-matrix graphic display: display device is arranged by a number of uniform composition of the dot-matrix LED display modules, suitable for broadcast text, image information.
LED video display: display devices are composed of many light-emitting diodes that can display video, animation and other video files.
3, by using the occasion categories
Indoor Display: LED spots smaller, general Φ3mm - Φ8mm, shows the general area of a few to more than ten square meters.
Outdoor Display: dozens of square meters in size to several hundred square meters, high brightness, can work in the sun, with wind, rain, water resistant.
4, classified by light spot diameter
Indoor screen: Φ3mm, Φ3.75mm, Φ5mm,
Room external screen: Φ10mm, Φ12mm, Φ16mm, Φ19mm, Φ20mm, Φ21mm, Φ22mm, Φ26mm
Room external screen as the basic unit of light emitting tube, LED tube principle is a set of red, green, and blue light-emitting diode sealed in a plastic barrel and jointly develop
5. Display a static, horizontal scroll, vertical scroll and flip display. One block module control drive 12 (up to control 24) 8X8 Dot Matrix, a total of 16X48 dot matrix (or 32X48 dot matrix), is a single block of MAX7219 (or PS7219, HD7279, ZLG7289 and 8279, and the like LED display driver module) 12 times (or 24 times)! Can use "cascade" approach the composition of any large dot matrix display. Effects, good power consumption, and the MAX7219 circuit than the use of lower cost.
The technological advantages of the third led display Review:
Existing common indoor full color program comparison:
1. Dot-matrix program modules: the first design, the interior pseudo-color dot-matrix screen developed from
Advantages: The most advantageous raw material costs and production and processing process is simple, stable quality.
Cons: poor color consistency, mosaic phenomena more serious, show less effective.
2. Single-lamp program: To solve the problem matrix color screen, drawing a program of outdoor display technology, while outside the pixel multiplexing (also known as pixel-sharing technology, virtual pixel) ported to the interior display.
Advantages: color consistency better than dot-matrix module approach.
Disadvantages: blending effect of poor little perspective, about watching a horizontal color. Processing more complex and demanding anti-static. The actual pixel resolution is more difficult to achieve 10,000 points or more.
3. Patch program: SMD LED used to show the program components.
Advantages: Color consistency, perspective and other important indicators show the best of existing programs in a particular three in one surface-mount mixing effect is very good.
Disadvantages: trouble processing costs are too high.
4. Sub-surface mount options: single-light program is actually an improvement, is still under improvement.
Advantage: the display color consistency, perspective and other programs the primary target and stickers little difference, but the lower cost, display good resolution in theory can do more than 17,200.
Disadvantages: Processing is more complex and demanding anti-static.
Fourth: LED display key technical indicators:
Pixels out of control rate
Pixels out of control rate refers to the smallest screen imaging units (pixels) does not work correctly (control) proportion. The pixel control has two modes: one blind spot, that is, blind spots, in the time it does not need bright light, called blind spots; second, often highlight the need but does not shine when it has been lit, called the regular highlights. In general, the composition of pixels have 2R1G1B (2 颗 red light, a green and a blue light, following the same reason), 1R1G1B, 2R1G, 3R6G so out of control is generally not the same pixel in the red, green, and blue light while all the out of control, in which a lamp out of control as long as we believe that this pixel is out of control. For simplicity
10.4 Inch LCD Touch Screen Monitor
we have by the color LED display (red, green, blue) pixels, respectively out of control and calculation of statistics, which take the maximum out of control as the display pixel rate.
The number of pixels out of control accounted for the total number of full-screen pixel ratio, which we call "full-screen pixel out of control rate." Moreover, to avoid loss of control of any one pixel region, we proposed "regional pixels out of control rate", that is, 100 × 100 pixels in the region, out of control the number of pixels and the total pixel area (ie 10,000) of the same. The index of the "LED display general specification" SJ/T11141-2003 in "out of control pixels were discrete distribution" requirements were quantified, convenient and intuitive.
Currently the LED display in the factory will be aging (roast machine), the LED lights on the control pixels are maintained or changed, "the entire screen pixels out of control rate" control in the 1 / 104 s, the "regional pixels out of control rate" control 3 / 104 is no problem within, and even some corporate standards of individual manufacturers before delivery does not allow out of control pixels, but this is bound to increase the manufacturer's manufacturing and maintenance costs and extend the shipping time. In different applications, the pixel control the rate of actual requirements can have great differences,10.4 Inch TFT LCD Touch Screen Monitor in general, LED display for video playback, the indicator control in 1 / 104 is acceptable within, is to be achieved; If the characters for simple information dissemination, the indicator control is reasonable within 12/104
Gray Scale
Gray is the so-called color scale or gray scale, is the degree of brightness of light and shade. The digital display technology, the gray is the determinant of the number of display colors. Generally speaking, the higher the gray, richer color display screen and the more delicate, more details of the performance of the rich.
Gray level depends on the system's A / D converter bits. Of course the system of video processing chips, memory, and the median transmission system must provide the appropriate support Caixing. Currently the main uses 8-bit LED display processing system, namely 256 (28) gray scales. Simple to understand that from a total of 256 black to white brightness variations. Using RGB primary colors constitute a 256 × 256 × 256 = 16777216 colors. Known as 16 trillion colors. Major international brands with 10-bit display processing system, that is 1024 gray scale, RGB color RGB constitute 1.07 billion.
Although the number of gray color determinants of the decision, but bigger is better not to say unlimited. Because the first resolution of the human eye is limited, Moreover the system will involve dealing with the improvement of the median to the system video processing, storage, transmission, scanning and other links of change, the cost of sharp increases in cost reduction rather than. General civil or commercial grade products can be 8-bit systems, broadcast-level products in a 10-bit systems.
Differential brightness level
Brightness level is the identification of the human eye to distinguish the image from the black to the brightness level between the most white. Mentioned earlier, the gray scale of some very high, can reach 256 or even 1024. However, due to the sensitivity of brightness the human eye is limited, and can not identify these gray levels. That is probably many neighboring gray level is the same as the human eye looks. And the resolving power of each eye varies. For the display, identify the level of the human eye is naturally the more the better, because the displayed image, after all, be looked at. The brightness of the human eye can distinguish more levels means greater display color space, indicating the greater potential for rich color. Brightness level can identify specific software to test, generally up to 20 or more screens to even better levels of.
Gray nonlinear transformation
Gray is the gray nonlinear transformation of data in accordance with the empirical data or a non-linear relationship between the arithmetic transform and then provided to the screen display. As the LED is a linear device, with the traditional display of non-linear display characteristics of different. In order to make LED display can meet the traditional data sources without loss of gray level, usually in the LED display system will do after the gray-level data, the nonlinear transformation, the transformed data the median increase (to ensure no loss of gray degree of data). Internal control systems are now a number of suppliers so-called gray or 16 384 4096 or later are gray through nonlinear transformation that gray space. 4096 is used 8-bit source to 12-bit nonlinear transform space, 16,384 is the use of 8-16 nonlinear transform. By the 8-bit source as nonlinear transformation, the transformed space is certainly higher than 8-bit source large. Usually at least 10. As gray as this parameter is not bigger is better, generally 12 to do enough to change the.
Fifth: LED display commonly used terms explained
1, LED brightness
Brightness LEDs with luminous intensity of the general (Luminous Intensity) that the unit is the candela cd; 1000ucd (micro candela) = 1 mcd (cents Candela), 1000mcd = 1 cd. Indoor Single LED's light intensity is generally 500ucd-50 mcd, and outdoor LED single light intensity is only general should be 100 mcd-1000 mcd, 1000 mcd or more.
2, LED pixel module
LED arranged in matrix or document segment into a standard-size prefabricated modules. Common indoor display 8 * 8 pixel blocks, 8 characters 7 digital module. Outdoor display pixel module has 4 * 4,8 * 8,8 * 16 pixels and other specifications. Outdoor display with pixel blocks because each pixel formed by the two or more LED tubes, solid tubes, also known as the module for the set.
3 pixels (Pixel) and pixel diameter
LED display for each can be individually controlled LED light unit (point) is called pixels (or pixel). ∮ pixel diameter is the diameter of each pixel, the unit is mm.
For indoor display, usually one for a single LED, form a circle. Common indoor display pixel diameter schools have ∮ 3.0, ∮ 3.75, ∮ 5.0, ∮ 8.0, of which the ∮ 5.0 ∮ 3.75 and up.
In the outdoor environment, to enhance brightness, increase the line of sight, a pixel contains two or more cluster LED; as two or more cluster LED generally not circular, solid outdoor display pixels with 22 pixels in diameter generally average distance that : □ 10, □ 11.5, □ 16, □ 22, □ 25.
4, point spacing, pixel density and information content
LED display 22 pixels from the center or point spacing (Dot Pitch); unit area, the number of pixels called pixel density; unit area, called the number contained in the information display capacity. This is the essence of the three described the same concept: the point spacing is 22 pixels to reflect the distance between the pixel density and pixel density of the distance between the physical properties of the display; information capacity is the pixel density of the information carrying capacity the number of units.
The smaller the distance between points, the higher pixel density, the more information capacity, for closer viewing distance.
Points, the greater the spacing, the lower pixel density, the less information content, the farther the distance for viewing.
5, resolution
LED pixel screen ranks as the number of LED display resolution. Pixel display resolution is the total, which determines the information capacity of a display.
6, LED display (LED Panel)
The LED pixel module assembly arranged in accordance with the actual needs of the size of matrix, together with the dedicated display driver circuit, DC power supply, software, frameworks and external decoration, which constitutes a LED display.
7, gray
Light gray is the pixel brightness level change, a color of gray are generally from 8 to 1024. For example, if each color of gray for the 256, for two-color color screen, the display colors for the 256 × 256 = 64K colors, also known as the screen display to 256 colors.
8, two-color
Today most of the color LED display is a two-color color screen, that is, each pixel has two LED dice: one red die, a die for the green light. Die red light when the pixel is red, bright green die when the pixels are green, red and green light when you die while the pixel yellow. In which red, green as color.
9, full-color
Two-color plus red, green and blue color, three color constitute full color. Constitute a full-color as the blue tube and pure green die more expensive, so far, a relatively small color screen.
Sixth: led display market outlook
Status: led display due expensive now, mainly used in more upscale places, mainly in the bustling city sites as part of multi-media advertising. Single color led display are mainly used in transport, highways, banks, securities trading and other financial establishments.
After: With the improvement of living standard, outdoor led display will gradually be used in various industries.
VII of the advantages of LED display technology
(1) imported LED die production of high-quality full-color display: a large angle, low power consumption, uniform color, thickness of ultra-thin screen, screen light weight, low failure rate, easy maintenance advantage.
(2) The PCTV card: The card 10.4 Inch Touch screen Monitoris an excellent set of performance show, acquisition, video capture features such as multimedia video card, the card comes with a Studio editing software. Studio is a company Pinnacle Systems award-winning software common with existing ordinary compared Multimedia Card
It has the following advantages:
① enables the user to their PC, making digital movies, capture video, edit and add the style of the title change, or even their own music and digital video production of narrative.
② Studio allows users to choose to MPEG or AVI file format to store the output video and CD disc, or Web site display, or create video email. As Pinnacle Systems Studio can capture the company's range of devices to work Video capture has become not easy before.
③ Studio applications are from like a VCR is easy to use with good, better, best quality format, and calculate how much the computer can store the video. Studio automatically find and record the scene changes so that editing becomes easy
④ use Studio to create a fast and interactive process. Use instant preview window can be edited at any time preview of the film, that is, one can see that income.
⑤ If you do not like the title or effect, you can make a change and you can immediately see this change, video editing has never been this fast and fun. Enough freedom and enough individual, also has background music, voice-over and other effects.
(3) using the latest DVI interface technology: DVI Interface (Digital Visual Interface) is a PC, and digital flat panel displays (including) the industry standard interface, we all know, 10.4 Inch Touch Screen LCD
the computer is digital, that it dealt with all digital information , but so far the most widely used CRT monitors (such as TV) is analog. So in dealing with good data sent to the computer display, you must be a D / A converter (D / A), such treatment caused the loss of information and display the results of the defect. LCD, PDP, HDTV and other Xinyi Dai Xian Shiqi Ben Shen of the digital, the traditional approach, computer graphics output from the card (analog) still have further analog-digital conversion (A / D) can be sent to the display, which in turn resulted in new losses and troubles. using DVI interface, the development of LED display systems directly from the PC, the DVI interface to obtain the number of cards like the Galaxy do not need a dedicated graphics card, do not need special the collection card, PC, the limit can not, because there is no D / A conversion process and the MD, to avoid the image detail is lost, thus ensuring the computer image10.4 Inch Touch screen VGA Monitor on the screen in a perfect reproduction. same time, because DVI is an industry standard Suoyisuiran Bandwidth up to 83MHZ, also work well. now DVI supports VGA (640 × 480) to HDTV (1920 × 1080) and QXGA (2048 × 1536) of all the display modes. In addition to using DVI interface, the development of LED display system, stable and reliable display data based on a number of important functions can be integrated
For example: ① no data loss, ② is not limited by the PC machine, ③ easy to upgrade, general graphics card memory 8M, and the card memory for the 128-256M, ④ window position and size of the adjustment; ⑤ frame rate up to 60HZ; ⑥ non- linear adjustment of the output is more suitable for the human eye viewing; ⑦ 100 级 Screen brightness control; ⑧ constant current drive; ⑨ unit board red, green and blue light were adjusted to eliminate the mosaic.
(4) with indoor full color system: the chip display data in addition to the completion of the allocation of tasks, their identity is to receive the 8-bit (8 bit) display data into 12-bit PWM output pulse that allows the display to achieve 4096 ( 12bit) level gray scale control, nonlinear 256 to ensure the realization of visual gray scale, to all true color of the visual effects, can be a fundamental solution to the digital display system as data transmission system caused by excessive complexity.
Has the following characteristics:
① simplicity as the most complex data conversion system parts in order to achieve the form of internal logic chip, the system becomes very simple.
② easy maintenance and simplicity of the system directly related to ease of maintenance, eliminating the need for complex control as part of system maintenance into one by a junior technician can complete the work, which not only reduces the overall maintenance costs , but also improves customer satisfaction.
③ high reliability control system will bring some of the simpler system of high reliability, which was mainly due to separation compared to integrated chip technology has several times the stability of the device technology.
④ cost-effective system to achieve the most reliable performance of 4096 gray screen color control, image display vivid, natural and effective to achieve the same display control.
⑤ unit, structural design and direction of the current development of the industry consistent with a large screen display system in the body of the structure of modular design, the system is simple to connect directly, not only ensure the physical screen size can be adjusted according to8 Inch Touch Screen LCD Panel need stitching, And the system's installation, commissioning and maintenance becomes very easy to minimize the display system failure rate is not visible.
⑥ industrial design system reliability, modular design, replacing the traditional design of a large number of separation devices, the system greatly improved the reliability and stability.
⑦ complete program that contains the data source component systems, transmission equipment, data processing, data distribution and software management tools to enable the construction of LED display into a simple standard. In practical applications, the technology continued to develop and perfect, has become a the most mature, stable, easy to implement system solutions.
⑧ equivalent CRT display LED display most of the core indicators of performance for each primary color (red, green, blue) realized that the brightness level of gray, the display of the current international standard is that each color to achieve Vision 256 gray. special grayscale control chip processing logic can be built out to 4096's gray, and from selection and fitting of CRT display with 256 gray scale output, the overall picture was more clear, vivid, full of infectious .
⑨ high resolution and high refresh rate in addition to gray level, the display of the other two performance indicators are the resolution and refresh rate. As the LED display their own characteristics and requirements, the traditional solution to the loss of which often one or two criteria as another indicator of the price increase. As chips per second per pin data output reached 1 trillion, far beyond the traditional program data output capability8 Inch VGA Monitor
, so that the problem is fundamentally be resolved. The full-color system can simultaneously support 1024 × 768 screen resolution and screen refresh rate up to 300Hz, far beyond the traditional performance solutions to enable the display stable, no flash, no tail.
(5) constant current drive: This circuit technology is mature and reliable, full-color display has been widely used, high cost performance, many companies now commonly used for the constant current driver chip, a better solution of discrete LED tube pressure drop good performance of the defect and eliminate the mosaic.
(6) optical fiber transmission, no attenuation of the fiber-optic transmission technology:
① optical transmission frequency bandwidth, large capacity communication. Fiber available bandwidth is about 1.25G, frequency bandwidth, increase the scanning frequency and the refresh rate, the company designed LED full color screen refresh frequency ≥ 200Hz / s.
② low loss optical fiber transmission, long distance relay. The maximum repeater distance is up to 15,000 meters, improved reliability and stability.
③ optical transmission against electromagnetic interference. Fiber is an insulator material, it is not natural lightning interference, ionosphere interference changes and sunspot activity, but also from high-voltage electrified railway feeder and industrial electrical equipment interference.
④ fiber diameter thin, light weight, soft. Fiber core diameter is very small, about 0.1mm, it is only one per cent of single-tube coaxial cable; cable diameter is small, 8-core optical fiber cross-sectional diameter about 10mm, while the standard coaxial cable to 47mm. use this feature fiber8 Inch TFT LCD Monitor, so little space occupied transmission system. so convenient and fast construction cabling.
⑤ optical fiber transmission has more than obvious advantages but also has strong corrosion resistance, anti-nuclear radiation, the advantages of small energy consumption
LED display (LED panel): LED is light emitting diode, light emitting diodes in abbreviation, abbreviated LED. It is a semiconductor light-emitting diode by controlling the display of its appearance is probably many months from the little red light is usually formed by the bright lights off to show character. Used to display text, graphics, images, animations, quotes, video, video signals and other information on the display screen.
Graphic display and LED display into the video display by the LED matrix blocks. Graphic displays can be synchronized with the computer display Chinese characters, English text and graphics; video display using micro computer control, graphic, image, and Mao, real-time, synchronization,,10.4 Inch Touch Screen LCD Monitor clear message to the broadcast transmission of various information, but also shows two dimensional, three-dimensional animation, video, TV, VCD programs and live on. LED display shows the screen brightly colored, three-dimensional sense of strong, static, such as painting, moving as the film is widely used in finance, tax, business, telecommunications, sports, advertising, industrial enterprises, transport, education systems, stations, docks, airports, shopping malls, hospitals, hotels, banks, securities markets, construction market, auction houses, industrial enterprises in management and other public places.
LED display can show changes in the numbers, text, graphics and video; not only can be used in the indoor environment can also be used for outdoor environment, with a projector, TV wall, LCD screen can not match advantage.
LED reason attention has been attached and rapid development, is that it itself has the advantage inseparable. To sum up these advantages are: high brightness, low voltage, power consumption, small size, long life, impact resistance and stable performance. LED's development prospect is extremely broad, the current is moving in a higher brightness, higher weather resistance, higher luminous density, higher luminous uniformity, reliability, full color of direction.
Second: LED display Category:
1, color by color can be divided into
Single-color display: Single color (red or green).
Two-color display: red and green dual-color, 256 gray scale levels, can display 65,536 colors.
Full-color screen: red, green, blue color, 256 grayscale full color display can display more than 16 million kinds of colors.
2, according to display device classification
LED digital display: seven segment display devices for the digital control code, suitable for production of the clock screen, the interest rate screens, showing the number of electronic display.
LED dot-matrix graphic display: display device is arranged by a number of uniform composition of the dot-matrix LED display modules, suitable for broadcast text, image information.
LED video display: display devices are composed of many light-emitting diodes that can display video, animation and other video files.
3, by using the occasion categories
Indoor Display: LED spots smaller, general Φ3mm - Φ8mm, shows the general area of a few to more than ten square meters.
Outdoor Display: dozens of square meters in size to several hundred square meters, high brightness, can work in the sun, with wind, rain, water resistant.
4, classified by light spot diameter
Indoor screen: Φ3mm, Φ3.75mm, Φ5mm,
Room external screen: Φ10mm, Φ12mm, Φ16mm, Φ19mm, Φ20mm, Φ21mm, Φ22mm, Φ26mm
Room external screen as the basic unit of light emitting tube, LED tube principle is a set of red, green, and blue light-emitting diode sealed in a plastic barrel and jointly develop
5. Display a static, horizontal scroll, vertical scroll and flip display. One block module control drive 12 (up to control 24) 8X8 Dot Matrix, a total of 16X48 dot matrix (or 32X48 dot matrix), is a single block of MAX7219 (or PS7219, HD7279, ZLG7289 and 8279, and the like LED display driver module) 12 times (or 24 times)! Can use "cascade" approach the composition of any large dot matrix display. Effects, good power consumption, and the MAX7219 circuit than the use of lower cost.
The technological advantages of the third led display Review:
Existing common indoor full color program comparison:
1. Dot-matrix program modules: the first design, the interior pseudo-color dot-matrix screen developed from
Advantages: The most advantageous raw material costs and production and processing process is simple, stable quality.
Cons: poor color consistency, mosaic phenomena more serious, show less effective.
2. Single-lamp program: To solve the problem matrix color screen, drawing a program of outdoor display technology, while outside the pixel multiplexing (also known as pixel-sharing technology, virtual pixel) ported to the interior display.
Advantages: color consistency better than dot-matrix module approach.
Disadvantages: blending effect of poor little perspective, about watching a horizontal color. Processing more complex and demanding anti-static. The actual pixel resolution is more difficult to achieve 10,000 points or more.
3. Patch program: SMD LED used to show the program components.
Advantages: Color consistency, perspective and other important indicators show the best of existing programs in a particular three in one surface-mount mixing effect is very good.
Disadvantages: trouble processing costs are too high.
4. Sub-surface mount options: single-light program is actually an improvement, is still under improvement.
Advantage: the display color consistency, perspective and other programs the primary target and stickers little difference, but the lower cost, display good resolution in theory can do more than 17,200.
Disadvantages: Processing is more complex and demanding anti-static.
Fourth: LED display key technical indicators:
Pixels out of control rate
Pixels out of control rate refers to the smallest screen imaging units (pixels) does not work correctly (control) proportion. The pixel control has two modes: one blind spot, that is, blind spots, in the time it does not need bright light, called blind spots; second, often highlight the need but does not shine when it has been lit, called the regular highlights. In general, the composition of pixels have 2R1G1B (2 颗 red light, a green and a blue light, following the same reason), 1R1G1B, 2R1G, 3R6G so out of control is generally not the same pixel in the red, green, and blue light while all the out of control, in which a lamp out of control as long as we believe that this pixel is out of control. For simplicity
10.4 Inch LCD Touch Screen Monitor
we have by the color LED display (red, green, blue) pixels, respectively out of control and calculation of statistics, which take the maximum out of control as the display pixel rate.
The number of pixels out of control accounted for the total number of full-screen pixel ratio, which we call "full-screen pixel out of control rate." Moreover, to avoid loss of control of any one pixel region, we proposed "regional pixels out of control rate", that is, 100 × 100 pixels in the region, out of control the number of pixels and the total pixel area (ie 10,000) of the same. The index of the "LED display general specification" SJ/T11141-2003 in "out of control pixels were discrete distribution" requirements were quantified, convenient and intuitive.
Currently the LED display in the factory will be aging (roast machine), the LED lights on the control pixels are maintained or changed, "the entire screen pixels out of control rate" control in the 1 / 104 s, the "regional pixels out of control rate" control 3 / 104 is no problem within, and even some corporate standards of individual manufacturers before delivery does not allow out of control pixels, but this is bound to increase the manufacturer's manufacturing and maintenance costs and extend the shipping time. In different applications, the pixel control the rate of actual requirements can have great differences,10.4 Inch TFT LCD Touch Screen Monitor in general, LED display for video playback, the indicator control in 1 / 104 is acceptable within, is to be achieved; If the characters for simple information dissemination, the indicator control is reasonable within 12/104
Gray Scale
Gray is the so-called color scale or gray scale, is the degree of brightness of light and shade. The digital display technology, the gray is the determinant of the number of display colors. Generally speaking, the higher the gray, richer color display screen and the more delicate, more details of the performance of the rich.
Gray level depends on the system's A / D converter bits. Of course the system of video processing chips, memory, and the median transmission system must provide the appropriate support Caixing. Currently the main uses 8-bit LED display processing system, namely 256 (28) gray scales. Simple to understand that from a total of 256 black to white brightness variations. Using RGB primary colors constitute a 256 × 256 × 256 = 16777216 colors. Known as 16 trillion colors. Major international brands with 10-bit display processing system, that is 1024 gray scale, RGB color RGB constitute 1.07 billion.
Although the number of gray color determinants of the decision, but bigger is better not to say unlimited. Because the first resolution of the human eye is limited, Moreover the system will involve dealing with the improvement of the median to the system video processing, storage, transmission, scanning and other links of change, the cost of sharp increases in cost reduction rather than. General civil or commercial grade products can be 8-bit systems, broadcast-level products in a 10-bit systems.
Differential brightness level
Brightness level is the identification of the human eye to distinguish the image from the black to the brightness level between the most white. Mentioned earlier, the gray scale of some very high, can reach 256 or even 1024. However, due to the sensitivity of brightness the human eye is limited, and can not identify these gray levels. That is probably many neighboring gray level is the same as the human eye looks. And the resolving power of each eye varies. For the display, identify the level of the human eye is naturally the more the better, because the displayed image, after all, be looked at. The brightness of the human eye can distinguish more levels means greater display color space, indicating the greater potential for rich color. Brightness level can identify specific software to test, generally up to 20 or more screens to even better levels of.
Gray nonlinear transformation
Gray is the gray nonlinear transformation of data in accordance with the empirical data or a non-linear relationship between the arithmetic transform and then provided to the screen display. As the LED is a linear device, with the traditional display of non-linear display characteristics of different. In order to make LED display can meet the traditional data sources without loss of gray level, usually in the LED display system will do after the gray-level data, the nonlinear transformation, the transformed data the median increase (to ensure no loss of gray degree of data). Internal control systems are now a number of suppliers so-called gray or 16 384 4096 or later are gray through nonlinear transformation that gray space. 4096 is used 8-bit source to 12-bit nonlinear transform space, 16,384 is the use of 8-16 nonlinear transform. By the 8-bit source as nonlinear transformation, the transformed space is certainly higher than 8-bit source large. Usually at least 10. As gray as this parameter is not bigger is better, generally 12 to do enough to change the.
Fifth: LED display commonly used terms explained
1, LED brightness
Brightness LEDs with luminous intensity of the general (Luminous Intensity) that the unit is the candela cd; 1000ucd (micro candela) = 1 mcd (cents Candela), 1000mcd = 1 cd. Indoor Single LED's light intensity is generally 500ucd-50 mcd, and outdoor LED single light intensity is only general should be 100 mcd-1000 mcd, 1000 mcd or more.
2, LED pixel module
LED arranged in matrix or document segment into a standard-size prefabricated modules. Common indoor display 8 * 8 pixel blocks, 8 characters 7 digital module. Outdoor display pixel module has 4 * 4,8 * 8,8 * 16 pixels and other specifications. Outdoor display with pixel blocks because each pixel formed by the two or more LED tubes, solid tubes, also known as the module for the set.
3 pixels (Pixel) and pixel diameter
LED display for each can be individually controlled LED light unit (point) is called pixels (or pixel). ∮ pixel diameter is the diameter of each pixel, the unit is mm.
For indoor display, usually one for a single LED, form a circle. Common indoor display pixel diameter schools have ∮ 3.0, ∮ 3.75, ∮ 5.0, ∮ 8.0, of which the ∮ 5.0 ∮ 3.75 and up.
In the outdoor environment, to enhance brightness, increase the line of sight, a pixel contains two or more cluster LED; as two or more cluster LED generally not circular, solid outdoor display pixels with 22 pixels in diameter generally average distance that : □ 10, □ 11.5, □ 16, □ 22, □ 25.
4, point spacing, pixel density and information content
LED display 22 pixels from the center or point spacing (Dot Pitch); unit area, the number of pixels called pixel density; unit area, called the number contained in the information display capacity. This is the essence of the three described the same concept: the point spacing is 22 pixels to reflect the distance between the pixel density and pixel density of the distance between the physical properties of the display; information capacity is the pixel density of the information carrying capacity the number of units.
The smaller the distance between points, the higher pixel density, the more information capacity, for closer viewing distance.
Points, the greater the spacing, the lower pixel density, the less information content, the farther the distance for viewing.
5, resolution
LED pixel screen ranks as the number of LED display resolution. Pixel display resolution is the total, which determines the information capacity of a display.
6, LED display (LED Panel)
The LED pixel module assembly arranged in accordance with the actual needs of the size of matrix, together with the dedicated display driver circuit, DC power supply, software, frameworks and external decoration, which constitutes a LED display.
7, gray
Light gray is the pixel brightness level change, a color of gray are generally from 8 to 1024. For example, if each color of gray for the 256, for two-color color screen, the display colors for the 256 × 256 = 64K colors, also known as the screen display to 256 colors.
8, two-color
Today most of the color LED display is a two-color color screen, that is, each pixel has two LED dice: one red die, a die for the green light. Die red light when the pixel is red, bright green die when the pixels are green, red and green light when you die while the pixel yellow. In which red, green as color.
9, full-color
Two-color plus red, green and blue color, three color constitute full color. Constitute a full-color as the blue tube and pure green die more expensive, so far, a relatively small color screen.
Sixth: led display market outlook
Status: led display due expensive now, mainly used in more upscale places, mainly in the bustling city sites as part of multi-media advertising. Single color led display are mainly used in transport, highways, banks, securities trading and other financial establishments.
After: With the improvement of living standard, outdoor led display will gradually be used in various industries.
VII of the advantages of LED display technology
(1) imported LED die production of high-quality full-color display: a large angle, low power consumption, uniform color, thickness of ultra-thin screen, screen light weight, low failure rate, easy maintenance advantage.
(2) The PCTV card: The card 10.4 Inch Touch screen Monitoris an excellent set of performance show, acquisition, video capture features such as multimedia video card, the card comes with a Studio editing software. Studio is a company Pinnacle Systems award-winning software common with existing ordinary compared Multimedia Card
It has the following advantages:
① enables the user to their PC, making digital movies, capture video, edit and add the style of the title change, or even their own music and digital video production of narrative.
② Studio allows users to choose to MPEG or AVI file format to store the output video and CD disc, or Web site display, or create video email. As Pinnacle Systems Studio can capture the company's range of devices to work Video capture has become not easy before.
③ Studio applications are from like a VCR is easy to use with good, better, best quality format, and calculate how much the computer can store the video. Studio automatically find and record the scene changes so that editing becomes easy
④ use Studio to create a fast and interactive process. Use instant preview window can be edited at any time preview of the film, that is, one can see that income.
⑤ If you do not like the title or effect, you can make a change and you can immediately see this change, video editing has never been this fast and fun. Enough freedom and enough individual, also has background music, voice-over and other effects.
(3) using the latest DVI interface technology: DVI Interface (Digital Visual Interface) is a PC, and digital flat panel displays (including) the industry standard interface, we all know, 10.4 Inch Touch Screen LCD
the computer is digital, that it dealt with all digital information , but so far the most widely used CRT monitors (such as TV) is analog. So in dealing with good data sent to the computer display, you must be a D / A converter (D / A), such treatment caused the loss of information and display the results of the defect. LCD, PDP, HDTV and other Xinyi Dai Xian Shiqi Ben Shen of the digital, the traditional approach, computer graphics output from the card (analog) still have further analog-digital conversion (A / D) can be sent to the display, which in turn resulted in new losses and troubles. using DVI interface, the development of LED display systems directly from the PC, the DVI interface to obtain the number of cards like the Galaxy do not need a dedicated graphics card, do not need special the collection card, PC, the limit can not, because there is no D / A conversion process and the MD, to avoid the image detail is lost, thus ensuring the computer image10.4 Inch Touch screen VGA Monitor on the screen in a perfect reproduction. same time, because DVI is an industry standard Suoyisuiran Bandwidth up to 83MHZ, also work well. now DVI supports VGA (640 × 480) to HDTV (1920 × 1080) and QXGA (2048 × 1536) of all the display modes. In addition to using DVI interface, the development of LED display system, stable and reliable display data based on a number of important functions can be integrated
For example: ① no data loss, ② is not limited by the PC machine, ③ easy to upgrade, general graphics card memory 8M, and the card memory for the 128-256M, ④ window position and size of the adjustment; ⑤ frame rate up to 60HZ; ⑥ non- linear adjustment of the output is more suitable for the human eye viewing; ⑦ 100 级 Screen brightness control; ⑧ constant current drive; ⑨ unit board red, green and blue light were adjusted to eliminate the mosaic.
(4) with indoor full color system: the chip display data in addition to the completion of the allocation of tasks, their identity is to receive the 8-bit (8 bit) display data into 12-bit PWM output pulse that allows the display to achieve 4096 ( 12bit) level gray scale control, nonlinear 256 to ensure the realization of visual gray scale, to all true color of the visual effects, can be a fundamental solution to the digital display system as data transmission system caused by excessive complexity.
Has the following characteristics:
① simplicity as the most complex data conversion system parts in order to achieve the form of internal logic chip, the system becomes very simple.
② easy maintenance and simplicity of the system directly related to ease of maintenance, eliminating the need for complex control as part of system maintenance into one by a junior technician can complete the work, which not only reduces the overall maintenance costs , but also improves customer satisfaction.
③ high reliability control system will bring some of the simpler system of high reliability, which was mainly due to separation compared to integrated chip technology has several times the stability of the device technology.
④ cost-effective system to achieve the most reliable performance of 4096 gray screen color control, image display vivid, natural and effective to achieve the same display control.
⑤ unit, structural design and direction of the current development of the industry consistent with a large screen display system in the body of the structure of modular design, the system is simple to connect directly, not only ensure the physical screen size can be adjusted according to8 Inch Touch Screen LCD Panel need stitching, And the system's installation, commissioning and maintenance becomes very easy to minimize the display system failure rate is not visible.
⑥ industrial design system reliability, modular design, replacing the traditional design of a large number of separation devices, the system greatly improved the reliability and stability.
⑦ complete program that contains the data source component systems, transmission equipment, data processing, data distribution and software management tools to enable the construction of LED display into a simple standard. In practical applications, the technology continued to develop and perfect, has become a the most mature, stable, easy to implement system solutions.
⑧ equivalent CRT display LED display most of the core indicators of performance for each primary color (red, green, blue) realized that the brightness level of gray, the display of the current international standard is that each color to achieve Vision 256 gray. special grayscale control chip processing logic can be built out to 4096's gray, and from selection and fitting of CRT display with 256 gray scale output, the overall picture was more clear, vivid, full of infectious .
⑨ high resolution and high refresh rate in addition to gray level, the display of the other two performance indicators are the resolution and refresh rate. As the LED display their own characteristics and requirements, the traditional solution to the loss of which often one or two criteria as another indicator of the price increase. As chips per second per pin data output reached 1 trillion, far beyond the traditional program data output capability8 Inch VGA Monitor
, so that the problem is fundamentally be resolved. The full-color system can simultaneously support 1024 × 768 screen resolution and screen refresh rate up to 300Hz, far beyond the traditional performance solutions to enable the display stable, no flash, no tail.
(5) constant current drive: This circuit technology is mature and reliable, full-color display has been widely used, high cost performance, many companies now commonly used for the constant current driver chip, a better solution of discrete LED tube pressure drop good performance of the defect and eliminate the mosaic.
(6) optical fiber transmission, no attenuation of the fiber-optic transmission technology:
① optical transmission frequency bandwidth, large capacity communication. Fiber available bandwidth is about 1.25G, frequency bandwidth, increase the scanning frequency and the refresh rate, the company designed LED full color screen refresh frequency ≥ 200Hz / s.
② low loss optical fiber transmission, long distance relay. The maximum repeater distance is up to 15,000 meters, improved reliability and stability.
③ optical transmission against electromagnetic interference. Fiber is an insulator material, it is not natural lightning interference, ionosphere interference changes and sunspot activity, but also from high-voltage electrified railway feeder and industrial electrical equipment interference.
④ fiber diameter thin, light weight, soft. Fiber core diameter is very small, about 0.1mm, it is only one per cent of single-tube coaxial cable; cable diameter is small, 8-core optical fiber cross-sectional diameter about 10mm, while the standard coaxial cable to 47mm. use this feature fiber8 Inch TFT LCD Monitor, so little space occupied transmission system. so convenient and fast construction cabling.
⑤ optical fiber transmission has more than obvious advantages but also has strong corrosion resistance, anti-nuclear radiation, the advantages of small energy consumption
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