Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1996-11-06
1999-11-09
Hjerpe, Richard A.
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345211, G09G 336
Patent
active
059823496
ABSTRACT:
A multiple voltage generator for driving a liquid crystal display (LCD) panel by a video data is provided. The video data has a first part and a second part. The voltage generator comprises: a voltage selector receiving a first part of the video data, and outputting first and second voltage levels according to the first part of the video data, where the first and second voltage levels define a first voltage interval; a weight voltage generator receiving a second part of the video data, and outputting a second voltage interval; a multiplier connected to the voltage selector and the weight voltage generator so as to receive the first and second voltage levels and the second voltage interval, the multiplier multiplying the first voltage interval by the second voltage interval with a multiplication factor to output a multiplication voltage; and an adder connected to the voltage selector and the multiplier so as to receive the first voltage level and the multiplication voltage, and the adder adding the first voltage level to the multiplication voltage to output a driving voltage.
REFERENCES:
patent: 5581210 (1996-12-01), Kimura
patent: 5583530 (1996-12-01), Mano et al.
Saito, S. et al., "A 6-bit Digital Data Driver for Color TFT-LCDs", Society for Information Display International Symposium Digest of Technical Papers, vol. XXVI pp. 257-260, 1995.
Joseph N. Babanezhad et al., "A 20-V Four-Quadrant CMOS Analog Multiplier", IEEE Journal of Solid-State Circuits, sc-20(6): 1158-1168 (1985).
Hjerpe Richard A.
LG Electronics Inc.
Nguyen Francis
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