Liquid crystal display system

Details Liquid crystal display system Liquid crystal display system

1994-12-20

1996-12-31

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Interconnection of plural cells in series

349 72, 349117, G02F 1133, G02F 11335

Patent

active

055899609

ABSTRACT:
A double-layer type super-twisted nematic liquid crystal display system including a liquid crystal display device for displaying characters and/or graphic forms, a compensating liquid crystal device for compensating the optical phase of the liquid crystal display device, a temperature sensor for detecting the ambient temperature of those devices, a light sensor for calculation of the display contrast of the liquid crystal display device, drive voltage control circuits for controlling the drive voltages applied to the liquid crystal display device and the compensating liquid crystal device, and a displaying light source. In the display system, the drive voltages applied to the liquid crystal display device and compensating liquid crystal device are adjusted according to the calculation of contrast, whereby the display is high in contrast at all times independently of the ambient temperature.

REFERENCES:
patent: 4952032 (1990-08-01), Inoue
patent: 5126868 (1992-06-01), Kizaki
patent: 5157525 (1992-10-01), Eaton
patent: 5168382 (1992-12-01), Tsujikawa
patent: 5208688 (1993-05-01), Fergason
patent: 5247378 (1993-09-01), Miller
patent: 5347382 (1994-09-01), Rumbaugh

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