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ADAPTIVE DIGITAL FILTERING METHOD AND APPARATUS IN TOUCH SENSING SYSTEM

  • US 20110285654A1
  • Filed: 05/09/2011
  • Published: 11/24/2011
  • Est. Priority Date: 05/20/2010
  • Status: Active Grant
First Claim
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1. An adaptive digital filtering method for touch data acquired in a touch display device including a plurality of sense channels, the method comprising:

  • storing the touch data in a buffer;

    estimating a signal-to-noise ratio (SNR) for the stored touch data;

    selecting a digital filter tap for a digital filter having plurality of filter taps based on the estimated SNR; and

    filtering on the touch data using the digital filter after selecting the digital filter tap.

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