LED Display Controller System With Color&brightness Calibration Function Basic On FPGA

With the development and popularization of the technology of LED display screen, the driving mode and control system of LED in the display screen are constantly updated and developed.The Full color LED display Generally has the uniformity issue. In this paper,analyzes the causes of light and color consistency by introduce the LED characteristics, principle of realizing full-color and constant current drive mode characteristics etc.Thereby,we analysis the feasibility of the rely on primary colors mixed light principle to modify the pixel color space of the feasibility of point by point correction, it provide the base for brightness and color correction function development on the end control system by program.This paper analyzes the basic characteristics of the control system, combined with the application requirements of high density display, determines the basic structure of the control system which based on FPGA architecture. The device selection of the control system in this paper, Combined with the development trend of high density LED screen and the system function demand; control system program basic on Verilog,and the program written to stable work and to realize fast data fan in and fan out and light color correction function.This paper also briefly introduces the design of the host computer and the characteristics of each function module.After test, control system successfully lit LED display, each functional module are working well, The brightness and color correction function improve the LED display color and brightness uniformatiy.