Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1996-12-04
1997-09-23
Hjerpe, Richard
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345 92, G09G 336
Patent
active
056709790
ABSTRACT:
A video display driver applies a video signal to column electrodes of a liquid crystal display. The display driver includes a reference ramp generator and column data line drivers. Each data line driver includes a switching arrangement coupled to a first capacitance for storing a portion of the video signal in the first capacitance. A first terminal of the first capacitance is coupled to the reference ramp generator for combining a reference ramp signal with the stored video signal and for applying the combined signal to an input of a comparator. The comparator controls a transistor that couples a data ramp signal to a given column of the pixels. The reference ramp generator is coupled to the input of the comparator in a non-switched manner such that no switching transistor is interposed in a signal path between the reference ramp generator and the input of the comparator.
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Huq Ruquiya Ismat Ara
Plus Dora
Henig Sammy S.
Hjerpe Richard
Laks Joseph J.
Nguyen Chanh
Thomson Consumer Electronics S.A.
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