Active Matrix Touch Sensor Perceiving Liquid Crystal Capacitance with Amorphous Silicon Thin Film Transistors

被引：21

作者：

Kim, Cheol-Se ^{[1
]}

Kang, Byung Koo ^{[1
]}

Jung, Ji Hyun ^{[1
]}

Lee, Min Jae ^{[1
]}

Kim, Hun Bae ^{[1
]}

Oh, Seung Seok ^{[1
]}

Jang, Su Hyuk ^{[1
]}

Lee, Hwan Joo ^{[1
]}

Kastuyoshi, Hiraki ^{[1
]}

Shin, Jong Keun ^{[1
]}

机构：

[1] LG Display, Dept Appl Technol, Gumi 730726, Gyungbuk, South Korea

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2010年 / 49卷 / 03期

关键词：

D O I：

10.1143/JJAP.49.03CC03

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An active matrix touch sensor is integrated into a liquid crystal display (LCD) panel. The sensor is composed of a liquid crystal capacitor and a sensing circuit with amorphous silicon thin film transistors (a-Si TFTs). The change in sensor capacitance when the sensor is touched is converted into current change by the sensing circuit in the pixel. The proposed touch sensor is pressure-sensitive enough to work at an external push force of 10 gf. The simplified sensing circuit also gives an improved aperture ratio over that in previous work. (C) 2010 The Japan Society of Applied Physics

引用

页数：4

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