Design and implementation of capacitive sensor readout circuit on glass substrate for touch panel applications

Tzu Ming Wang; Ming-Dou Ker

doi:10.1109/VDAT.2011.5783627

Design and implementation of capacitive sensor readout circuit on glass substrate for touch panel applications

Tzu Ming Wang^*, Ming-Dou Ker

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

3 Scopus citations

Abstract

A capacitive sensor readout circuit on glass substrate for touch panel applications has been designed and fabricated in a 3-μm low temperature poly-silicon (LTPS) technology. In this work, the small voltage difference from capacitance change due to the touch event on panel is amplified by the switch-capacitor (SC) technique. In order to reduce the effect from device characteristic variation in LTPS process, the proposed readout circuit applies the corrected double-sampling (CDS) technique to reduce the offset originated from LTPS process variation. To enhance the resolution of touch panel, a 4-bit analog-to-digital converter is utilized to identify the different touch area conditions.

Original language	English
Title of host publication	Proceedings of 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011
Pages	269-272
Number of pages	4
DOIs	https://doi.org/10.1109/VDAT.2011.5783627
State	Published - 28 Jun 2011
Event	2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011 - Hsinchu, Taiwan Duration: 25 Apr 2011 → 28 Apr 2011

Publication series

Name	Proceedings of 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011

Conference

Conference	2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011
Country/Territory	Taiwan
City	Hsinchu
Period	25/04/11 → 28/04/11

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10.1109/VDAT.2011.5783627

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Wang, T. M., & Ker, M-D. (2011). Design and implementation of capacitive sensor readout circuit on glass substrate for touch panel applications. In Proceedings of 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011 (pp. 269-272). [5783627] (Proceedings of 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011). https://doi.org/10.1109/VDAT.2011.5783627

@inproceedings{cfb91ab0374a4eb3bd26aefc87405f3d,

title = "Design and implementation of capacitive sensor readout circuit on glass substrate for touch panel applications",

abstract = "A capacitive sensor readout circuit on glass substrate for touch panel applications has been designed and fabricated in a 3-μm low temperature poly-silicon (LTPS) technology. In this work, the small voltage difference from capacitance change due to the touch event on panel is amplified by the switch-capacitor (SC) technique. In order to reduce the effect from device characteristic variation in LTPS process, the proposed readout circuit applies the corrected double-sampling (CDS) technique to reduce the offset originated from LTPS process variation. To enhance the resolution of touch panel, a 4-bit analog-to-digital converter is utilized to identify the different touch area conditions.",

author = "Wang, {Tzu Ming} and Ming-Dou Ker",

year = "2011",

month = jun,

day = "28",

doi = "10.1109/VDAT.2011.5783627",

language = "English",

isbn = "9781424484997",

series = "Proceedings of 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011",

pages = "269--272",

booktitle = "Proceedings of 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011",

note = "2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011 ; Conference date: 25-04-2011 Through 28-04-2011",

}

Wang, TM & Ker, M-D 2011, Design and implementation of capacitive sensor readout circuit on glass substrate for touch panel applications. in Proceedings of 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011., 5783627, Proceedings of 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011, pp. 269-272, 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011, Hsinchu, Taiwan, 25/04/11. https://doi.org/10.1109/VDAT.2011.5783627

Design and implementation of capacitive sensor readout circuit on glass substrate for touch panel applications. / Wang, Tzu Ming; Ker, Ming-Dou.
Proceedings of 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011. 2011. p. 269-272 5783627 (Proceedings of 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - A capacitive sensor readout circuit on glass substrate for touch panel applications has been designed and fabricated in a 3-μm low temperature poly-silicon (LTPS) technology. In this work, the small voltage difference from capacitance change due to the touch event on panel is amplified by the switch-capacitor (SC) technique. In order to reduce the effect from device characteristic variation in LTPS process, the proposed readout circuit applies the corrected double-sampling (CDS) technique to reduce the offset originated from LTPS process variation. To enhance the resolution of touch panel, a 4-bit analog-to-digital converter is utilized to identify the different touch area conditions.

AB - A capacitive sensor readout circuit on glass substrate for touch panel applications has been designed and fabricated in a 3-μm low temperature poly-silicon (LTPS) technology. In this work, the small voltage difference from capacitance change due to the touch event on panel is amplified by the switch-capacitor (SC) technique. In order to reduce the effect from device characteristic variation in LTPS process, the proposed readout circuit applies the corrected double-sampling (CDS) technique to reduce the offset originated from LTPS process variation. To enhance the resolution of touch panel, a 4-bit analog-to-digital converter is utilized to identify the different touch area conditions.

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BT - Proceedings of 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011

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Wang TM, Ker M-D. Design and implementation of capacitive sensor readout circuit on glass substrate for touch panel applications. In Proceedings of 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011. 2011. p. 269-272. 5783627. (Proceedings of 2011 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2011). doi: 10.1109/VDAT.2011.5783627

Design and implementation of capacitive sensor readout circuit on glass substrate for touch panel applications

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