With the rapid development of large-scale integrated circuits and computer technology, LED display technology has also been improved as an emerging display technology, especially the high gray level display with its modern attitude, widely used in various corporate images. Promotion and public place information display. Throughout the development of LED display screens, in the early 1990s, all-weather indoor and outdoor dual-primary grayscale screens were gradually developed, and they were called the fifth-generation LED display screens abroad, accompanied by the development of computers, three-dimensional animation, various special effects display. The way to inject new vitality into the fifth-generation display. 
First, LED digital display overview
LED display : Also called electronic display or mobile display. It consists of LED dot matrix, which displays text, pictures, animations and videos through the red, blue, yellow, white and green lights. The content can be changed at any time as long as it is what you think of it. Displayed in the display, each component is a modular display device.
The composition of the LED digital display: usually consists of a display module, a control system and a power supply system. The display module is composed of a dot matrix composed of LED lights. It is mainly responsible for the light-emitting display. The control system can display the text, picture, video and other content you want by controlling the corresponding area to be turned off. The constant dance card is mainly played. Animated; the power system is responsible for converting the input voltage and current into the voltage and current required by the display.
LED display performance is superior: the brightness is strong. When the sunlight is directly on the screen surface within the visible distance, the display content is clearly visible. The super gray control has 1024-4096 gray scale control, the display color is 16.7M or more, the color is clear and vivid, and the stereoscopic effect is strong. The static scanning technology adopts a static latch scanning method and is driven by a large power to fully ensure the luminance of the light. Automatic brightness adjustment with automatic brightness adjustment for optimal playback in different brightness environments.
LED digital display classification
(1) Classification by display device:
LED digital display: The display device is a 7-segment Digital Tube, which is suitable for making clock screens, interest rate screens, etc., and displaying digital electronic displays.
LED dot matrix graphic display: The display device is a dot matrix display module composed of a plurality of uniformly arranged light emitting diodes, suitable for playing text and image information.
LED video display: The display device is composed of many light-emitting diodes, which can display various video files such as video and animation.
(2) According to the series classification, it can be divided into: LED curtain wall screen, LED soft screen, LED floor screen, LED stripe screen, LED strip screen display, LED ultra-thin screen, LED curved screen.
Second, the design of LED digital display
Take a hotel as an example to talk about the design and maintenance of LED digital display.
The size of the hotel's hangable LED display is: 55CM*1700CM
The size of the single primary color unit board is as follows: P10 is 160*160MM; P16 is 256*128MM; P20 is 320*160
The hotel chooses P16LED unit board, the actual area of ​​LED screen is: 51.2CM*16.9CM=865.28CM2
A total of 264 blocks of P16 LED unit board are selected.
Hardware requirements:
The basic configuration of the computer is required to be:
Host CPU Celeron CIV 1.8G (with ISA interface) Above memory 128M hard disk 20G optical drive 48-speed CDROM color display 15" floppy drive 3.5" floppy drive keyboard 101 key WIN98 keyboard mouse PS/2
Twisted pair; VGA connector;
System software list: windows system; JLL-LED ANIMATORPRO3DMAX ULEAD 3D COOL MDK 5.0 LEDSHOW 3.0 Microsoft Powerpoint.
Power: 220W/2A power supply.
Video control card
Third, LED digital display common fault repair
From the fault, it can be divided into two types of faults, one is the fault on the drive, and the other is the fault on the control system.
1, the fault on the drive:
2. Control system:
LED module failure and solution control system
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