Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1996-10-22
1999-03-16
Zimmerman, Mark K.
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345508, 345511, 345512, 345509, 345521, G09G 302
Patent
active
058836101
ABSTRACT:
There is disclosed a graphics overlay device for overlaying a video signal and a graphics signal and outputting the overlayed signal, the graphics overlay device including a frame memory for storing video data, a video address generator for generating a video address which designates an area of the frame memory to read therefrom or store therein, at least two graphics overlay memories for reading and writing graphics data alternatively by a predetermined period wherein the writing is performed on an area designated by a graphics address and the reading is performed on an area designated by the video address, a multiplexer for selecting and outputting graphics data output from one of graphics overlay memories, a look up table for overlaying the video data output from the frame memory and the graphics data output from the multiplexer and outputting the overlayed data, and a central processing unit for generating the graphics data which designates an area of the graphics overlay memories on which the graphics data is to be stored, and a select controlling signal which controls recording and reading operations of the graphics overlay memories, and a switching operation of the multiplexer.
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Kovalick Vincent E.
Samsung Electronics Co,. Ltd.
Zimmerman Mark K.
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