Projection-type liquid crystal display device

Details Projection-type liquid crystal display device Projection-type liquid crystal display device

1997-04-24

2000-06-06

Hjerpe, Richard A.

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

345 1, 345 2, 345 3, 345102, G09G 336, G09G 500

Patent

active

060724587

ABSTRACT:
A projection-type liquid crystal display device having a light source for emitting a luminous flux; a liquid crystal light valve for modulating the luminous flux emitted by the light source means; a liquid crystal drive circuit for applying the common voltage to the common electrode and the video signal to the source electrode; a projection lens for projecting the luminous flux modulated by the liquid crystal light valve onto a screen; a liquid crystal temperature detector for detecting temperature in the vicinity of the liquid crystal light valve; and a controller. The controller controls the common voltage and/or the source voltage on the basis of values detected by the liquid crystal temperature detector in such a way that fluctuation in the light transmittance of the liquid crystal light valve means is reduced.

REFERENCES:
patent: 4745403 (1988-05-01), Tamura
patent: 4763922 (1988-08-01), Takeda et al.
patent: 4923285 (1990-05-01), Ogino et al.
patent: 5033822 (1991-07-01), Ooki et al.
patent: 5041821 (1991-08-01), Onitsuka et al.
patent: 5253074 (1993-10-01), Wortel et al.
patent: 5300942 (1994-04-01), Dolgoff
patent: 5317332 (1994-05-01), Kanno et al.
patent: 5748171 (1998-05-01), Ishizaki et al.

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