Active-matrix sensor in AMLCD detecting liquid-crystal capacitance with LTPS-TFT technology

Active-matrix sensor in AMLCD detecting liquid-crystal capacitance with LTPS-TFT technology

— 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...

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Veröffentlicht in:Journal of the Society for Information Display 2009-02, Vol.17 (2), p.79-85
Hauptverfasser: Kanda, Eiji, Eguchi, Tsukasa, Hiyoshi, Yasunori, Chino, Taketo, Tsuchiya, Yasushi, Iwashita, Takahiro, Ozawa, Tokuro, Miyazawa, Takao, Matsumoto, Tomotaka
Format: Artikel
Sprache:eng
Schlagworte:
capacitive sensor
fringe-field switching
Low-temperature poly-Si TFT
touch panel
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Zusammenfassung:— 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.
ISSN:1071-0922
1938-3657
DOI:10.1889/JSID17.2.79