Apparatus and method for measuring capacitance in touch sensor
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United States of America Patent
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Sep 9, 2014
Grant Date -
Apr 25, 2013
app pub date -
Oct 24, 2011
filing date -
Oct 24, 2011
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Abstract
An apparatus and method are provided to rapidly and accurately measure the variation of capacitance in a panel load of a touch sensor and thus increase touch sensitivity and noise resistance. The apparatus includes a panel driver configured to drive a panel load in the touch sensor according to a reference voltage, and a capacitive load detector configured to measure capacitance of the panel load by sensing a panel load driving current that is applied to the panel load by the panel driver.
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