Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Patent
1997-11-26
2000-08-01
Shankar, Vijay
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
348790, G09G 500
Patent
active
06097379&
ABSTRACT:
A liquid crystal display device is realized which facilitates the automatic display adjustment of moving images, and which effectively detects noise or the like interfering with the video signal. The liquid crystal display device is provided with: PLO circuit one, which generates a standard clock (PCLK) which is synchronized with a horizontal synchronizing signal; a phase adjusting circuit two, which includes a divider circuit 11, a delay circuit 12, a sampling circuit for detection 13, a stable period detecting circuit 14 and a controller 15, and which automatically phase of the standard clock (PCLK), and outputs a N divided sampling clock (SCLK); a pixel data sampling circuit three, into which the video signal is inputted, and which outputs sampling data obtained in accordance with the sampling clock (SCLK); a liquid crystal drive circuit 4, which outputs a liquid crystal drive signal; a video signal processing signal 6, which conducts video processing including gamma correction, polarity inversion, and the like with respect to the sampling data; and a liquid crystal panel five into which the video processed image data are inputted, and which displays these data.
REFERENCES:
patent: 4780759 (1988-10-01), Matsushima et al.
patent: 5654735 (1997-08-01), Nakajima
patent: 5894299 (1999-04-01), Tsuchiya et al.
patent: 5914699 (1999-06-01), Imamura
patent: 5917777 (1999-06-01), Tanigawa
"Automatic Phase Adjustment", IBM Technical Disclosure Bulletin, vol. 37, No. 5, May 1994, pp. 203-204.
Frenel Vanel
NEC Corporation
Shankar Vijay
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