P-197: 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

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)1841-1844
Number of pages4
JournalDigest of Technical Papers - SID International Symposium
Volume42 1
DOIs
StatePublished - 1 Jun 2011

Fingerprint Dive into the research topics of 'P-197: Active matrix touch sensor detecting time-constant change implemented by IGZO TFTs'. Together they form a unique fingerprint.

Cite this