基于FPGA的单色点阵液晶显示器灰度算法

A Grayscale Arithmetic of Single-color Dot Matrix Liquid Crystal Display Based on FPGA

LCD(液晶显示器)作为一种显示器件,希望电路结构尽可能简单,功耗小并能实现集成化;作为图形显示,希望其有足够多的灰度级且稳定无闪烁现象,灰度级越多,图像层次越分明,图像越柔和,所以灰度的表达对于显示器来说是极其重要的。文中基于FPGA(现场可编程门阵列)的单色点阵LCD分析了目前国内外所采用的灰度算法及其控制电路,特别是对相位分布规律进行了研究,并在此基础上提出了一种新型的公式算法,该算法利用对像素数据的实时处理,解决了存储器法中面积大、功耗高的缺点,同时对该算法进行了详细的分析。

Liquid crystal display regarded as a type of display is desired to have its electrocircuit as simple as possible and its power consumption low, and to be integrated; also as a picture displayer, it is hoped to have adequate gray grade and stable with no glinting. More gray grade could make picture layer more clear and picture more subdued, so it is important to have gray grade expression of display. This article analyzes the grayscale algorithm and control circuit already employed for single-color dot matrix liquid crystal display based on FPGA at home and abroad, especially studies phase distribution law. A new formula algorithm was developed on basis of that it uses real time picture data processing power consumption, at the same time the to remove the disadvantage of large area and high algorithm is analyzed carefully and detailedly.