Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1995-04-14
1997-12-02
Hjerpe, Richard
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 87, 349 42, 349 72, G09G 336
Patent
active
056941471
ABSTRACT:
An active matrix liquid crystal display includes an arrangement for maintaining the liquid crystal material of the display at a controlled temperature above ambient temperature. The liquid crystal material of the display is disposed over a substrate containing integrated circuitry. The arrangement for maintaining the temperature of the liquid crystal includes (i) an arrangement for heating the liquid crystal material sufficient to maintain the liquid crystal material at the controlled temperature, (ii) an arrangement for sensing the temperature at a location in close proximity to the liquid crystal material and producing an output signal representative of the temperature, and (iii) a servo-circuit responsive to the output signal for causing the heating arrangement to maintain the liquid crystal material at the controlled temperature. In accordance with the present invention, at least some of the elements making up the arrangement for heating the liquid crystal, the arrangement for sensing the temperature, or the servo-circuitry are formed as part of the integrated circuitry contained within the substrate which the liquid crystal is disposed over. In one preferred embodiment of the present invention, all of the elements making up the arrangement for heating the liquid crystal, the arrangement for sensing the temperature, and the servo-circuitry are formed as part of the integrated circuitry contained within the substrate which the liquid crystal is disposed over.
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Gaalema Stephen D.
Handschy Mark A.
Chang Kent
Displaytech, Inc.
Hjerpe Richard
Shear Stephen C.
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