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NOISE DETECTION IN MULTI-TOUCH SENSORS

  • US 20080158169A1
  • Filed: 01/03/2007
  • Published: 07/03/2008
  • Est. Priority Date: 01/03/2007
  • Status: Active Grant
First Claim
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1. A method of detecting noise in one of at least three touch images, each touch image comprising a plurality of touch sample values obtained by stimulating a touch sensor at a unique frequency, the method comprising:

  • determining a mismatch of sample values obtained at each pair of frequencies;

    comparing the mismatches to identify one or more noisy frequencies; and

    if one or more noisy frequencies are identified, computing a touch value as a function of sample values obtained at frequencies other than the identified noisy frequencies.

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