標題: Design and Implementation of Readout Circuit on Glass Substrate for Touch Panel Applications
作者: Wang, Tzu-Ming
Ker, Ming-Dou
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: Low temperature poly-silicon (LTPS);readout circuit;system-on-panel (SOP);touch panel
公開日期: 1-Aug-2010
摘要: A readout circuit on glass substrate for touch panel application has been designed and fabricated in a 3-mu m low temperature poly-silicon (LTPS) technology. In this work, the switch-capacitor (SC) technique is applied to amplify the small voltage difference from capacitance change due to the touch event on panel. In addition, the corrected double-sampling (CDS) technique is also employed to reduce the offset originated from LTPS process variation. The minimum detectable voltage difference of the proposed circuit is 40 mV. To further identify the different touch area during touch events, a 4-bit analog-to-digital converter is used to converter the output of readout circuit into 4-bit digital codes.
URI: http://dx.doi.org/10.1109/JDT.2010.2050577
http://hdl.handle.net/11536/32328
ISSN: 1551-319X
DOI: 10.1109/JDT.2010.2050577
期刊: JOURNAL OF DISPLAY TECHNOLOGY
Volume: 6
Issue: 8
起始頁: 290
結束頁: 297
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