Design and Implementation of Readout Circuit with Threshold Voltage Compensation on Glass Substrate for Touch Panel Applications
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概要
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A new on-panel readout circuit with threshold voltage compensation for capacitive sensor in low temperature polycrystalline silicon (poly-Si) thin-film transistor (LTPS-TFT) process has been proposed. In order to compensate the threshold voltage variation from LTPS process variation, the proposed readout circuit applies a novel compensation approach with switch capacitor technique. In addition, a 4-bit analog-to-digital converter (ADC) is added to identify different sensed capacitor values and further enhances the overall resolution of touch panel.
- 2011-03-25
著者
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Ker Ming-dou
Nanoelectronics And Gigascale Systems Laboratory Institute Of Electronics National Chiao-tung Univer
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Lin Yu-Ta
Nanoelectronics and Gigascale Systems Laboratory, Institute of Electronics, National Chiao-Tung University, 1001 Ta-Hsueh Road, Hsinchu, Taiwan 300, R.O.C.
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Ker Ming-Dou
Nanoelectronics and Gigascale Systems Laboratory, Institute of Electronics, National Chiao-Tung University, 1001 Ta-Hsueh Road, Hsinchu, Taiwan 300, R.O.C.
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Wang Tzu-Ming
Nanoelectronics and Gigascale Systems Laboratory, Institute of Electronics, National Chiao-Tung University, 1001 Ta-Hsueh Road, Hsinchu, Taiwan 300, R.O.C.
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