As a high-tech product, LED display screen is attracting people\'s attention. It is becoming a leader in display media with its wide dynamic range, high brightness, long life and stable working performance. It is now widely used in advertising, securities, transportation, information release and other aspects. With the continuous improvement of full-color screen display technology, LED display screen has a broad market prospect. The main object of this paper is the full-color LED synchronous display screen control system. A system implementation scheme is proposed. The whole system is divided into three parts: DVI decoding circuit, sending system and receiving system. The DVI decoding module is used to obtain video source data from the DVI port of the graphics card, and restore the 24-bit pixel data of red, green and blue and some control signals for LED screen display after TDMS decoding. The sending system is used to cache the received data stream and send it to the Ethernet chip for Ethernet transmission after processing. The receiving system receives the video data stream uploaded on the Ethernet, stores it in SRAM for cache after bit separation operation, and then serially inputs it to the LED display screen for scanning and display. Then, the feasibility of the scheme is discussed from many aspects, and the connection and constraint relationship between the technical parameters of the LED display screen are carefully derived. This project uses programmable logic devices to complete system functions. Programmable logic devices have the characteristics of high integration, high speed, and online programmability. They can not only meet the speed requirements of high-speed image data processing, but also increase the flexibility of the design. There is no need to modify the circuit hardware design, shorten the design cycle, and can also be upgraded online.
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