Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1995-03-21
1998-08-18
Powell, Mark R.
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345152, 348752, 349 78, 349102, 349103, 349118, 349181, G09G 336, G09G 502, G02F 11347, G02F 11335
Patent
active
057963789
ABSTRACT:
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.
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Kikuchi Zenta
Sato Soichi
Yoshida Tetsushi
Casio Computer Co. Ltd.
Miller John W.
Powell Mark R.
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