Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1995-09-07
1997-10-07
Hjerpe, Richard
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 52, G09G 300
Patent
active
056753527
ABSTRACT:
In accordance with one aspect of the invention, a liquid crystal display driver for driving liquid crystal display electrodes, comprises: a voltage signal generator adapted to provide a predetermined voltage signal to the liquid crystal display electrodes, the voltage signal generator being further adapted to be activated when the voltage signal level of said electrodes is outside a predetermined dead zone region, the voltage signal generator being deactivated when the voltage signal level of the electrodes is substantially within the predetermined dead zone region; and a switch adapted to couple the voltage signal generator to at least one of said liquid crystal display electrodes. In accordance with another aspect of the invention, a method for providing voltage signals to electrodes of a liquid crystal display, comprising the steps of activating a first voltage signal generator to provide a voltage signal for the electrodes when the voltage signal level of the ectrodes falls outside a dead zone region; and deactivating the first voltage signal generator when the voltage signal level of the electrodes falls within the dead zone region.
REFERENCES:
patent: 4356483 (1982-10-01), Fujita et al.
patent: 5061920 (1991-10-01), Nelson
Multiplexing Liquid-Crystal Displays By: Paul Smith May 25, 1978.
Rich David Arthur
Wilson Harold Joseph
Hjerpe Richard
Lucent Technologies - Inc.
Osorio Ricardo
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