McDermott Will & Emery LLP
Electrostatic capacity type touch sensor for detecting a large number of touch positions with a small number of detection electrodes
There is offered an electrostatic capacity type touch sensor capable of detecting a large number of touch positions with high accuracy. The electrostatic capacity type touch sensor is composed of a touch panel and a signal processing circuit. The touch panel is structured to include first through fourth detection electrodes, first and second common electric potential lines, a common electric potential wiring, a common electric potential terminal and first through fourth output terminals disposed on an insulating substrate. The signal processing circuit is structured to include a clock generator, a selection circuit, a charge amplifier, an A/D converter and an arithmetic unit. The charge amplifier detects a change in capacitance induced by that a finger of an operator touches the first through fourth detection electrodes.
On Semiconductor Trading, Ltd.
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Takayasu Kazuhiro Hiroya Atsuhiro
Otagaki Hasegawa Ito Ichikawa