Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1994-02-01
1995-07-18
Weldon, Ulysses
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 87, 345185, G09G 336
Patent
active
054345898
ABSTRACT:
An electronic apparatus having a TFT LCD includes a detector for detecting whether or not display data in a video RAM is rewritten. When the rewrite operation of display data is detected, a display controller reads out display data from the video RAM, and supplies the readout display data to the TFT LCD. When data on a memory plane for storing display data, which is being displayed on the TFT LCD, is rewritten, the display controller reads out display data from the video RAM, and supplies the readout display data to the TFT LCD. When display data to be written in the Video RAM is the same as the already stored display data, the display controller does not supply the display data from the video RAM to the TFT LCD.
REFERENCES:
patent: 4727363 (1988-02-01), Ishii
patent: 4796203 (1989-01-01), Roberts
patent: 4942389 (1990-07-01), Hinami
patent: 5059961 (1991-10-01), Cheng
patent: 5247286 (1993-09-01), Ishikawa
Japanese Video Catalog document, "A New Image World", published Jan. 31, 1983 (four pages), with translation.
Nakamura Nobutaka
Zenda Hiroki
Kabushiki Kaisha Toshiba
Luu Matthew
Weldon Ulysses
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