Data driving circuit for lcd display

Details Data driving circuit for lcd display Data driving circuit for lcd display

G - Physics

09

G

G09G 3/36 (2006.01)

Patent

CA 2148351

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 con- nect 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 precharg- ing circuit is deposited on the substrate to precharge the pixel capa- citors to a first voltage level such that the video data input signals coupled thereto in a demultiplexed fashion causes the pixels to dis- charge to a second predetermined voltage level to provide a video display as the rows of pixels are sequentially scanned.

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