Design Of Driving Board For Color Lcd Based On FPGA

Due to its advantages of small size,no electromagnetism radiation, and low driving voltage etc., LCD has been widely used in measurement instruments as an important tool for man-machine interaction. in the industry. In spite of low cost, the monochrome LCD can not meet the requirement of ever increasing demand for better machine-user interface. To meet the requirement of competiveness of products in the market, it is a trend for monochrome LCD to be replaced by color LCD in the test and measurement industry.There exist two kinds of LCD screens, i.e., analog and digital screens. The digital screen has a much higher price than analog screen. The reason is that the higher resolution of digital screen requires a denser circuit, better workmanship, and therefore a higher cost in the production. Thus, in the production of test and measurement equipments, the low cost color analog screen is preferred.The driving circuit for analog screen has a complicated structure for the input to screen is analog signal. Although the riving control can be implanted by the ASIC IC, such as the HX8817A, designed by TAIWAN Himax Technologies Inc, the design needs a high speed MCU, making a high price of the equipment.In this thesis, a driving board based on FPGA for analog screen is designed. The design employs the XC3S50 FPGA of Xilinx Co. and low cost C8051 to drive the TFT analog screen module AT056TN04. It implements the AT056TN04 driving, the refresh of LCD, and external user interface. Simulations and system test results show that the design works well in the display of 8 kinds of basic colors. The designed driving overcomes both the monotony of monochrome LCD module and the high price of the Real Color digital LCD module. By appropriate adjustment, it can be easily applied to other LCD module and can be widely used in the industrial instrumentations.