Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1996-12-31
1999-07-20
Hjerpe, Richard A.
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 94, 345 90, G09G 336
Patent
active
059261625
ABSTRACT:
A control circuit for providing a common electrode voltage for a liquid crystal display dynamically controls the voltage applied to the common electrode according to various factors that affect the capacitance across the liquid crystal layer. The common electrode control circuit dynamically adjusts the common electrode voltage according to the current maximum and minimum display voltages. In addition, the common electrode control circuit adjusts the common electrode voltage according to the gate-to-source parasitic capacitance, as well as temperature fluctuations. Thus, the control circuit compensates for the most significant factors which may cause he inadvertent accumulation of a charge across the liquid crystal layer.
REFERENCES:
patent: 5159326 (1992-10-01), Yamazaki et al.
patent: 5537129 (1996-07-01), Okada et al.
patent: 5686932 (1997-11-01), Tomita
Dickey Bill A.
Wood Teddy J.
Abeyta Andrew A.
Hjerpe Richard A.
Honeywell Inc.
Johnson Kenneth J.
Nguyen Francis N.
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