METHOD OF DETECTING TOUCH AND APPARATUS FOR DETECTING TOUCH USING THE SAME
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United States of America Patent
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Issued Date -
Oct 30, 2014
app pub date -
Apr 23, 2014
filing date -
Apr 25, 2013
priority date (Note) -
Abandoned
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Abstract
A touch detecting apparatus includes a signal source configured to generate a variable phase signal including a reference phase signal and an out-of-phase signal that is out of phase with the reference phase signal, a touch panel including a plurality of driving electrodes and a plurality of sensing electrodes, wherein, if the variable phase signal is applied to one of the plurality of driving electrodes, the sensing electrode outputs a touch signal that is modulated using the variable phase signal, a signal conversion circuit unit configured to detect the touch signal modulated using the variable phase signal, and output the touch signal in the form of a voltage signal, a demodulation circuit unit configured to demodulate the signal output from the signal conversion circuit unit using the variable phase signal, and an accumulator configured to accumulatively output the signal output from the demodulation circuit unit.
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