Videotex terminal system using CRT display and binary-type LCD d

Details Videotex terminal system using CRT display and binary-type LCD d Videotex terminal system using CRT display and binary-type LCD d

1994-12-30

1995-12-26

Hjerpe, Richard

Computer graphics processing and selective visual display system

Plural display systems

Diverse systems

345 98, G09G 302

Patent

active

054791847

ABSTRACT:
In a videotex terminal system, image data has a code frame and a photo frame, and each of these frames includes dot pattern data, foreground color data, background color data, and flashing data. This type of image data can be simultaneously displayed on both a cathode ray tube display (CRT) and a liquid crystal display (LCD). These two displays are not controlled independently of each other; rather, they are controlled in association with each other by a display control unit to eliminate the need to use a complicated software program in a central processing unit (CPU) and to reduce the number of hardware components required by the system. The display control unit is particularly advantageous in that is can easily discriminate the code frame and the photo frame from each other, and it enables the system to execute a reliable display operation.

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