Touch sensor circuit and touch display device
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United States of America Patent
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Nov 24, 2015
Grant Date -
Mar 27, 2014
app pub date -
Nov 22, 2012
filing date -
Sep 27, 2012
priority date (Note) -
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Abstract
A touch sensor circuit and a touch device are provided. The touch sensor circuit includes a charging capacitor, a first current supplying unit, a second current supplying unit, and a switch unit. Wherein, the charging capacitor is serially connected between a detecting terminal and a reference voltage. The first current supplying unit is coupled to the detecting terminal, and receives a first bias voltage signal, and generates a first charging current at the detecting terminal according to the first bias voltage signal. A second current supplying unit is coupled to the detecting terminal, and receives a second bias voltage signal, and generates a second charging current at the detecting terminal according to the second bias voltage signal. The second terminal and the third terminal of the switch respectively supply the first and the second bias voltage signal.
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