Active matrix touch sensor detecting time-constant change implemented by IGZO TFTs

Lu Sheng Chou*, Hao Lin Chiu, Kuan Ta Lin, Ya-Hsiang Tai

*Corresponding author for this work

研究成果: Conference contribution同行評審

摘要

We propose a novel concept of using the RC time-constant to sense the capacitance change induced by touch and demonstrate it with a sensing circuit implemented by IGZO TFTs. The pixel circuit is consisted of one resistor and two TFTs in series, which are sequentially turned by consecutive gate pulses. By increasing the delay time of the first gate pulse waveform, a large transient ON current can flow through the TFTs while the second pulse comes, and thus become a significant sensing signal. This pixel consumes low power because the transient current only occurs when a pixel is touched.

原文English
主出版物標題49th Annual SID Symposium, Seminar, and Exhibition 2011, Display Week 2011
頁面1841-1844
頁數4
出版狀態Published - 1 十二月 2011
事件49th Annual SID Symposium, Seminar, and Exhibition 2011, Display Week 2011 - Los Angeles, CA, United States
持續時間: 15 五月 201120 五月 2011

出版系列

名字49th Annual SID Symposium, Seminar, and Exhibition 2011, Display Week 2011
3

Conference

Conference49th Annual SID Symposium, Seminar, and Exhibition 2011, Display Week 2011
國家United States
城市Los Angeles, CA
期間15/05/1120/05/11

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