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,

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

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

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

LED display protection levels mean?

LED display relates to box, frame, the IP number of the number of frequent words, where the IP is what does that mean? The so-called IP is the acronym for International Protection, in the Chinese language,)8 Inch Touch Screen LCD Monitor called the protection level. IP system is IEC (International Eletrontechnical Commission) drafted, will prevent moisture lamps according to the characteristics of dust to grade. Read the IP number which represents the meaning of a better understanding of our LED cabinet, LED display and the frame is of great significance.

IP protection class is composed of two digital:
Figure 1 is I: that light from the dust, to prevent the intrusion of foreign objects hierarchy
No. 2 figure, that is P: that light anti-moisture, water penetrated the closed level, with higher numbers indicated higher levels of their protection

The first number indicated the definition of (I):
0 no protection: the person or thing on the outside without special protection
1 is greater than 50mm to prevent the intrusion of solid objects: to prevent the body (eg palm) accidentally come into contact with the parts inside the lamp. To prevent the large size (diameter greater than 50mm
8 Inch TFT LCD Touch Screen Monitor


intrusion of foreign objects.
2 greater than 12mm to prevent the intrusion of solid objects: prevent people to touch the components inside the lamp to prevent middle-size (large diameter 12mm) intrusion of foreign objects.
3 to prevent solid objects greater than 2.5mm invasion: to prevent the diameter or thickness greater than 2.5mm of tools, wires or similar details of the small foreign object intrusion exposed to light the internal parts.
4 to prevent solid objects greater than 1.0mm invasion: to prevent the diameter or thickness greater than 1.0mm of tools, wires or similar small details of the invasion of foreign material exposed to 8 Inch LCD Touch Screen Monitorthe parts inside the lamp.
5 Dust: to completely prevent the intrusion of foreign matter, though not completely prevent dust from entering, but the amount of intrusion of dust and will not affect the normal operation of lamps.
6 Dust: to completely prevent the intrusion of foreign objects, and can completely prevent dust from entering the

The second number indicated the definition of (P):
0 No Protection: No Protection
A drop of water intrusion prevention: vertical drops of water droplets (such as condensation of water) on the lamp will not cause harmful effects.
2 can tilt 15 degrees to prevent dripping alien: When light from a vertical tilt to 15 degrees, the water dripping on the lamp will not cause adverse effects
3 to prevent the spraying of water intrusion: rain, or to prevent the vertical angle between the direction of less than 60 degrees of water sprayed into the light damage.
4 to prevent the splash of water intrusion: to prevent the water from all directions into the light splash damage.
5 to prevent the jet of water intrusion: from all directions to prevent the water from the injection nozzle into the light damage.
6 to prevent the intrusion of big waves: the installation of lighting on the deck to prevent the attack because of the waves into the damage.
7 to prevent the f8 Inch LCD Touch Screen Monitorslooding of water intrusion: lamps immersed in water pressure at a certain time or a certain standard the following to ensure that no damage caused by water.
8 sank when the water to prevent the invasion: the sinking of the indefinite light water pressure in the specified circumstances, to ensure that no damage caused by water.