发明名称 |
Touch sensor-equipped display device |
摘要 |
In order to provide a touch sensor-equipped display device that is not susceptible to the effect of noise caused by a polarity reversal in a common voltage of a display device without using special circuitry, the disclosed touch sensor-equipped display device is provided with: a sensor output read circuit 21 that is sequentially connected to a plurality of sensor electrodes of a touch sensor part 7 and that outputs a signal voltage according to the electrical properties of each electrode; a sensor control circuit 23 that supplies a control signal to the sensor output read circuit 21; and a coordinate calculation circuit 22 that detects a contact position on the basis of the signal voltage. The coordinate calculation circuit 22 is provided with: an averaging circuit 221 that calculates the average values of signal voltage values obtained during a scan that was started in synchronization with a horizontal synchronization signal when the common voltage is reversed from positive polarity to negative polarity, and the signal voltage values obtained during a scan that was started in synchronization with a horizontal synchronization signal when the common voltage is reversed from negative polarity to positive polarity; and a contact position detection circuit 222 that detects the contact position on the basis of the average values. |
申请公布号 |
US8723829(B2) |
申请公布日期 |
2014.05.13 |
申请号 |
US201113634516 |
申请日期 |
2011.03.03 |
申请人 |
NISHIMURA TOMOHIKO;MIYAZAWA JIN;SHARP KABUSHIKI KAISHA |
发明人 |
NISHIMURA TOMOHIKO;MIYAZAWA JIN |
分类号 |
G06F3/041 |
主分类号 |
G06F3/041 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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