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Method of detecting touch and apparatus for detecting touch using the same

  • US 9,274,663 B2
  • Filed: 04/23/2014
  • Issued: 03/01/2016
  • Est. Priority Date: 04/25/2013
  • Status: Active Grant
First Claim
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1. An apparatus for detecting touch comprising:

  • 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 frequency 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,wherein a frequency of the variable frequency signal is increased or reduced from the starting frequency to the ending frequency.

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