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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Mar 1, 2016
Grant Date -
Oct 30, 2014
app pub date -
Apr 23, 2014
filing date -
Apr 25, 2013
priority date (Note) -
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Abstract
Disclosed are an apparatus for detecting touch and a method for detecting touch with reduced effect of noise. The apparatus includes a signal source configured to generate a variable frequency signal changed from a starting frequency to an ending frequency, a touch panel including a plurality of driving electrodes and a plurality of sensing electrodes, wherein the variable phase signal is applied to one of the plurality of driving electrodes, and the sensing electrode outputs a touch signal that is modulated by the variable frequency signal, a demodulation unit configured to demodulate the touch signal using the variable frequency signal, and an accumulation unit configured to accumulate the demodulated touch signal to detect the touch.
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