32.2: Touch-Panel Controller Implemented with LTPS TFTs
2009
A touch panel controller has been implemented with LTPS TFTs on a glass substrate. It induces voltage gradient across either plate of a 4-wire resistive touch panel and senses the intermediate potential at the touch position via the other plate. Then it converts the acquired analog voltage into digital signal and outputs 3-bit digital data for the horizontal and vertical positions respectively.
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