Design of FPGA-based large screen scan control system

This paper presents a scan display control system of large screen based on programmable logic devices(FPGA).First according to the requirement of the system general design,the structure and principle of the system are analyzed.FPGA serves as the scan controller of the LED display screen in this system.It is responsible for receiving and refreshing display datas from ARM.After analyzing the functions of the system,the FPGA chip's internal functions are designed by using modularization method.Then the LED display function is achieved.It resolves the problem that LED display screen can't be satisfied with the large display area and the frequently switched display data.This system can support the stability of larger viewable display area and store more display contents.