Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1997-11-26
1999-08-31
Brier, Jeffery
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345211, 345214, G09G 336, G09G 500
Patent
active
059459700
ABSTRACT:
Liquid crystal display devices include an array of liquid crystal display cells arranged as a plurality of columns of display cells electrically coupled to respective data lines and a plurality of rows of display cells electrically coupled to respective gate lines. A gate line on/off voltage generator and gate line driving circuit are provided to drive at least a first gate line with a turn-on voltage of first polarity (e.g., positive voltage) and simultaneously driving at least a second gate line with a turn-off voltage of second polarity (e.g., negative voltage). First and second screen clearing circuits are also provided to improve the screen clearing capability of the liquid crystal display device. The first screen clearing circuit can be electrically coupled to the first gate line to perform the function of driving the first gate line from the turn-on voltage (e.g., positive voltage) to a ground reference voltage upon termination of a power supply signal; and the second screen clearing circuit of different design can be electrically coupled to the second gate line to perform the function of driving the second gate line from the turn-off voltage (e.g., negative voltage) to the ground reference voltage upon termination of the power supply signal. These driving functions may act to increase the conductivity of the TFTs in the "off" display cells and thereby improve the rate of charge leakage from the storage capacitors and the liquid crystal capacitors therein.
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European Search Report, Mar. 18, 1997.
Kwon Sun-Yung
Lee Hyong-Gon
Lee Ju-Man
Moon Seung-Hwan
Brier Jeffery
Lewis David L
Samsung Electronics Co,. Ltd.
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