38.1: Embedded Liquid Crystal Capacitive Touch Screen Technology for Large Size LCD Applications

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<jats:title>Abstract</jats:title><jats:p>A new embedded touch screen panel (TSP) incorporated with liquid crystal capacitive (LCC) sensors and a‐Si:H TFT amplifiers has been developed. The size of sensor pixels and capacitance values have been optimized for improved sensitivity. The readout current from a sensor pixel is converted to readout voltage data, and a digital calibration process is conducted. A sensing voltage larger than 1V is obtained with 50gf finger touch, and a highly sensitive multi‐finger touch operation has been demonstrated with aproto‐type 16 inch qHD panel.</jats:p>

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