A 5*9 inch polysilicon gray-scale colour head down display chip

A 320000-pixel self-scanned display with CMOS-TFT (thin-film-transistor) gray-scale generators is described. Integration of the scanning-circuitry needed to drive the 400*800-pixel active-matrix liquid-crystal display was achieved by fabricating both data-line and select-line driver circuits on the 127*228.6-mm rectangular glass substrate, along with the same polysilicon thin-film pixel transistors used to improve the optical performance of the display. The scanner circuits are implemented in dynamic CMOS circuitry. The fully redundant data scanners are located at the top of the array. The select scanners are on the left and right. The circuitry is divided into 54 independent blocks to increase the effectiveness of the redundancy and laser repair procedures. The chop ramp scanning technique used to handle the 32-gray-level color display requirement is discussed.<
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