38.1: Embedded Liquid Crystal Capacitive Touch Screen Technology for Large Size LCD Applications
S Takahashi, BJ Lee, JH Koh, S Saito… - … Symposium Digest of …, 2009 - Wiley Online Library
S Takahashi, BJ Lee, JH Koh, S Saito, BH You, ND Kim, SS Kim
SID Symposium Digest of Technical Papers, 2009•Wiley Online LibraryA 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 …
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 …
Abstract
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.
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