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Shinji Yamagishi

National Archives and Records Administration

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SID Symposium Digest of Technical Papers | 2010

24.3L: Late-News Paper: In-Cell Capacitance Touch-Panel with Improved Sensitivity

Christopher James Brown; Kazutoshi Kida; Shinji Yamagishi; Hiromi Kato

We present a novel pixel circuit for an in-cell capacitive type force-sensitive touch panel. The TFT based capacitance sensor system comprises an active pixel sensor circuit with novel sensing capacitor structure and in-pixel amplification to achieve a high sensitivity. The observed 8.5x increase in sensitivity over standard methods provides a practical solution to obtain a robust, mechanically compact and low-cost force sensitive multi-touch panel.

international workshop on active matrix flatpanel displays and devices | 2016

High-definition in-cell touch panel with parallel scanning method

Kenshi Tada; Kazutoshi Kida; Shinji Yamagishi; Takenori Maruyama; Jean Mugiraneza; Yasuhiro Sugita; Hidetsugu Kawamori; Takashi Saitoh; Hideki Shioe

We have developed a high-definition in-cell (HDI) touch panel technology that uses a parallel scanning method. This technology can be incorporated into various TFT backplanes including LTPS TFT and IGZO TFT. We have developed 5.7” WQHD LTPS LCD and 4.95” FHD IGZO LCD, both of which are integrated in-cell touch panels. A Nega-type liquid crystal (LC) material for IPS mode was used. The parallel scanning method allows high-definition in-cell touch panel LCDs with good touch panel performance, with SNR over 48.5dB.

Archive | 2012