Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1994-05-25
1996-09-24
Hjerpe, Richard
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 95, 345100, G09G 336
Patent
active
055595260
ABSTRACT:
An active-matrix liquid crystal display has a drive circuit for driving thin-film transistors. The drive circuit comprises a shift register transmitting a sequence of image data for a single scanning line, latch circuits, tristate output circuits, pixel electrodes, and switching devices each turning on and off a pixel electrode. Each tristate output circuit has an control terminal and an input terminal. When the level of a image data received by the control terminal is high, the tristate output circuit, in response to a high or low potential of a frame signal received by the input terminal, outputs a high or low potential respectively different from those of the frame signal. The switching devices enable the output potential of each tristate output circuit to be charged in the pixel electrodes. During the charge time, the shift register transmits a next sequence of image data.
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Casio Computer Co. Ltd.
Hjerpe Richard
Wu Xiao M.
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