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Active‐matrix sensor in AMLCD detecting liquid‐crystal capacitance with LTPS‐TFT technology
Author(s) -
Kanda Eiji,
Eguchi Tsukasa,
Hiyoshi Yasunori,
Chino Taketo,
Tsuchiya Yasushi,
Iwashita Takahiro,
Ozawa Tokuro,
Miyazawa Takao,
Matsumoto Tomotaka
Publication year - 2009
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/jsid17.2.79
Subject(s) - active matrix , thin film transistor , capacitance , capacitive sensing , materials science , liquid crystal display , optoelectronics , pixel , parasitic capacitance , computer science , electrical engineering , nanotechnology , computer vision , electrode , chemistry , engineering , layer (electronics)
— An active‐matrix capacitive sensor for use in AMLCDs as an in‐cell touch screen has been developed. Pixel sensor circuits are embedded in each pixel by using low‐temperature polycrystalline‐silicon (LTPS) TFT technology. It detects a change in the liquid‐crystal capacitance when it is touched. It is thin, light weight, highly sensitive, and detects three or more touch events simultaneously.