Design and implement the readout circuit of an in-cell high-resolution capacitive touch panel

Tsung Yen Ku, Chang-Po Chao*, Chin Hai Huang, En Chih Liu, Ming Hua Yeh, Han Chang Chen, Tong Wen Wang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper proposes a high resolution capacitive touch panel readout circuit to sense the Variation by self-capacitance method. This AM display of in-cell structure includes an active architecture for improved resolution, that controlling the TFT (Thin-film transistor) to make the accuracy better. In addition, the panel has 60 sensing point per 0.88 inches and the proposed readout circuit used switched capacitor charge amplifier(SCCA) to sensing the charge change and enhances the SNR (Signal-to-noise) by eliminating the baseline. The experimental results show that the proposed readout circuit SNR achieves 38dB and the frame rate is 200Hz.

Original languageEnglish
Title of host publicationASME 2017 Conference on Information Storage and Processing Systems, ISPS 2017
PublisherAmerican Society of Mechanical Engineers
ISBN (Electronic)9780791858103
DOIs
StatePublished - 1 Jan 2017
EventASME 2017 Conference on Information Storage and Processing Systems, ISPS 2017 - San Francisco, United States
Duration: 29 Aug 201730 Aug 2017

Publication series

NameASME 2017 Conference on Information Storage and Processing Systems, ISPS 2017

Conference

ConferenceASME 2017 Conference on Information Storage and Processing Systems, ISPS 2017
CountryUnited States
CitySan Francisco
Period29/08/1730/08/17

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    Ku, T. Y., Chao, C-P., Huang, C. H., Liu, E. C., Yeh, M. H., Chen, H. C., & Wang, T. W. (2017). Design and implement the readout circuit of an in-cell high-resolution capacitive touch panel. In ASME 2017 Conference on Information Storage and Processing Systems, ISPS 2017 (ASME 2017 Conference on Information Storage and Processing Systems, ISPS 2017). American Society of Mechanical Engineers. https://doi.org/10.1115/ISPS2017-5436