Temperature compensated color LCD projector

Details Temperature compensated color LCD projector Temperature compensated color LCD projector

1991-12-18

1993-10-12

Powell, Mark R.

Facsimile and static presentation processing

Facsimile

Recording apparatus

359 86, 345101, H04N 574

Patent

active

052530744

ABSTRACT:
In a projection display device based on one or more (twisted nematic) LCDs (4), simple temperature compensation is possible by optimizing the d..DELTA.n value (n) at the maximal operating temperature. The associated transmission/voltage characteristics at different temperatures then extend substantially parallel so that it is possible to compensate for temperature changes by means of a simple voltage compensation.

REFERENCES:
patent: 4031529 (1977-06-01), Borel et al.
patent: 4045791 (1977-08-01), Fukai et al.
patent: 4328493 (1982-05-01), Shanks et al.
patent: 4639722 (1987-01-01), Urabe et al.
patent: 5012274 (1991-04-01), Dolgoff
patent: 5029982 (1991-07-01), Nash

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