Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1998-04-21
2000-11-28
Nguyen, Chanh
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345100, G09G 336
Patent
active
061541923
ABSTRACT:
A liquid crystal display device and a data line drive circuit of the same capable of individually reducing offsets between a video signal input and outputs, reducing a difference of offsets among outputs, and accordingly obtaining a good image quality, provided with a plurality of output blocks provided with sample-and-hold circuits connected in series for sampling the input video signal and holding the sampled data for a constant period; a drive circuit for outputting the held data of the sample-and-hold circuit as a signal of a predetermined level; and an output level adjustment circuit for comparing voltages V1 and V2 set in the switching period of the horizontal synchronization signal in the input video signal and an output signal voltage of the drive circuit and adjusting the level of the output signal of the drive circuit to a constant level.
REFERENCES:
patent: 5574474 (1996-11-01), Tamanoi
patent: 5623279 (1997-04-01), Itakura et al.
patent: 5798747 (1998-08-01), Moraneji
patent: 5874934 (1999-02-01), Ito
Katakura Masayuki
Ohga Genichiro
Takagi Yuichi
Kananen Ronald P.
Nguyen Chanh
Sony Corporation
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