LED electronic display by the general display units, drive unit, control unit, digital communications unit, video capture modules. In the display unit, three-color LED die as the core device for high-quality electronic LED display must be high-quality selection of LED die, which should be carefully selected wavelengths and luminous intensity of a good consistency of the tube. LED die from the quality point of view, Nichia Corporation (Japan), Toyota (Japan), Guanglei Corporation (Taiwan), HP's excellent product quality. In the drive unit should use low-power, long life, wide scope of work, a large current-driven power devices, TI's U.S. production of power devices have greater advantages of the product. In the control and communications unit, for control logic and timing. At present, in the logic circuit design the most advanced technology for the ISP technology, the United States LATTICE's ISP products have a greater advantage of the product. In the video capture unit, not only to consider the information processing of high-frequency noise, distortion problem, but also VGA signals in the accuracy of sampling and a variety of simultaneous signals synchronized performance in this area of domestic computer Beijing Galaxy's LED video card good quality .
Test the performance of LED display panels, the main study should be the following indicators:

Display resolution (pixels / m)
E-screen visual distance and perspective
And adjustable brightness, contrast and color, consistency and stability
Distribution of pure light, RGB non-linear correction (γ correction)
Gray: 256
Frame rate:> 60 / s
Can play static and dynamic images (including video screen), can meet the requirements of commercial advertising and sports competitions live request
No spots have been free to screen special effects and editing
Whether audio-visual synchronization
Whether a communication network capacity (network management and data exchange center)
Stable and reliable work to ensure the normal broadcast
Simple, easy to modify, easy maintenance 
As a new generation of information media, which has been available since the 1980s, the rapid development, especially in the 1990s, with the electronics, information industry to flourish, large color display is the development by leaps and bounds. High-brightness, the color of color a huge screen will enable tens of thousands of people watching at the same time, a great play up the force. Electronic LED display is based on advanced video display technology at the core, ultra bright LED electroluminescent materials for display, with audio and video systems, audio and video can be simultaneously broadcast by all kinds of information and multimedia information. As the electronic LED display with rich color, brightness and high-adjustable, synchronized audio and video, multimedia player to the screen, and the spots have been free to edit pictures, and other special feature, therefore, LED display panels are widely used in finance, posts and telecommunications, electric power The standardization of the industry, such as windows and advertising, promotional, sports stadiums and other public places by the electronic display, will be widely applied. 

High-resolution true color LED display panels, as a new media show, with its clear picture quality and the ability to broadcast high-performance, more and more attention. At present, domestic and foreign electronics LED display is moving in true color (224 colors), high-resolution (> 4096 pixels / square meter) development, it also requires more advanced video display control technology keep up with international trends. The technology constraints are the main factors: first, high-speed, large-scale FPGA technology ISP has come out of the chip; Secondly, the DC current source LED display mode control chip. LATTICE the United States in 92 years, has launched a high-performance FPGA chip, the United States in 98 years, TI has also introduced a high-performance LED display control chips. Overseas, 7100 pixels / m-resolution display unit has, but because of the domestic video display control technology has not yet fully grasp, so the domestic high-resolution LED display panels can not produce. At present, LED electronic display screen units are ultra-bright, high-resolution, high gray-scale development of its multi-media show to the media (static / dynamic graphic, video, audio and video synchronization) direction, the system Running, operation and maintenance to integration, networking and intelligent direction. The domestic electronics industry and research institutions should keep track of international trends and development to increase the pace of industrialization, and actively explore the domestic and foreign markets, and strive to make big-screen high-tech products in the manufacturing sector play the leading role.

Reference link: http://www.17led.com/LEDdisplay/2008-04/48p8.html