LCD projector comprising light sensor and correction circuit

Details LCD projector comprising light sensor and correction circuit LCD projector comprising light sensor and correction circuit

1997-04-10

2000-04-18

Dudek, James A.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

353 97, 358519, G02F 1133, G03B 2114, G03B 300, G03F 308

Patent

active

06052166&

ABSTRACT:
Known LCD projectors, used for example in TV sets, can only be manually adjusted for the compensation of the changing color spectrum of the lamp due to its aging process. An LCD projector according to the invention further comprises an image sensor to measure the light intensity of the lamp. In a color adjusting circuit the image color is compensated as a function of the measured signal by controlling the LCD valve.

REFERENCES:
patent: 5301017 (1994-04-01), Murakami
patent: 5315378 (1994-05-01), Satou et al.
patent: 5483299 (1996-01-01), Minoura
patent: 5488492 (1996-01-01), Abe
patent: 5519518 (1996-05-01), Watanabe et al.
patent: 5592239 (1997-01-01), Hara et al.
patent: 5597223 (1997-01-01), Watanabe et al.
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