Data driving circuit for LCD display

Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix

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345208, 345 94, G09G 336

Patent

active

054264472

ABSTRACT:
A data driver circuit and system driving scheme that can be integrated directly onto an LCD display substrate to eliminate the cost of the peripheral integrated circuits and the hybrid assembly needed by unscanned active matrix liquid crystal displays to connect them to the array. A demultiplexer circuit is deposited on the display for demultiplexing a group of Y columns of multiplexed video data input signals to X groups of Y pixel capacitors that are also deposited on the substrate in Z rows. In addition, a precharging circuit is deposited on the substrate to precharge the pixel capacitors to a first voltage level such that the video data input signals coupled thereto in a demultiplexed fashion causes the pixels to discharge to a second predetermined voltage level to provide a video display as the rows of pixels are sequentially scanned.

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