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,
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