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Multi-touch input discrimination

  • US 9,778,807 B2
  • Filed: 12/30/2015
  • Issued: 10/03/2017
  • Est. Priority Date: 01/03/2007
  • Status: Active Grant
First Claim
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1. A method to identify an input to a touch-surface device, comprising:

  • obtaining a proximity image from an array of sensing elements;

    segmenting the proximity image to identify one or more patches;

    generating a proximity sensor signal when an object is proximate a proximity sensor, the proximity sensor distinct from the array of sensing elements;

    determining a signal density value for at least one of the one or more patches; and

    using the signal density value and the proximity sensor signal to determine an object adjacent to or in contact with the touch-surface device; and

    wherein each patch has a plurality of pixels and each pixel has a pixel value and the signal density value is determined by dividing the sum of all pixel values in a patch by a radius of the patch.

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