Abstract: Based upon the display standards of IBM-PC CGA and the principle of thin film transistor (TFT) active matrix (AM) liquid crystal display (LCD), a control module including the circuits of LCD controller (LCDC) and encoding circuit et.al. are designed, which operats as CGA model and is able to replace CRT monitor in personal computer.

Key words: liquid crystal display, active matrix LCD, thin film transistor, CGA display

摘要： 为了用TFT AMLCD作为微型计算机的监视器，根据目前TFT AMLCD屏的水平并基于CGA的显示标准，设计了TFTAMLCD控制模块，该模块包括液晶显示控制器（LCDC）、编码电路、显存等几部分，它能够满足CGA的所有标准，正确接收和支持CPU指令，支持ROM-BIOS例程；能够提供液晶显示组件所需的各种控制信号，尤其是与CRT不同的信号。测试结果表明，利用所设计的控制模块能够用TFT AMLCD取代CRT终端，实现CGA方式的显示。

关键词: 液晶显示, 有源矩阵液晶显示, 薄膜晶体管, CGA显示