Birifringence control type liquid crystal display device and apparatus and method of driving the same

摘要

A color liquid crystal display apparatus comprises an ECB (Electrically Controlled Birifringence) type liquid crystal display device, which has a plurality of dots arranged in a matrix form and displays a plurality of colors in accordance with applied voltages dot by dot, and a driving circuit. The driving circuit includes an image memory, a display controller, a conversion table, a D/A converter and drivers. The display controller reads image data stored in the image memory. This image data defines a display color of a pixel consisting of a plurality of dots and a gradation. The conversion table converts image data to voltage data defining voltages to be applied to a plurality of dots of the liquid crystal display device in order to display the color and gradation defined by the image data. The D/A converter converts this voltage data to an analog voltage and the drivers apply this analog voltage to each dot of the liquid crystal display device. The color and gradation defined by the image data are expressed by the visual combination of the display colors of a plurality of dots constituting each pixel. The thicknesses of the liquid crystal layer at a plurality of dots constituting each pixel in the ECB liquid crystal display device differ from one another.