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Negative pixel compensation

  • US 8,754,874 B2
  • Filed: 10/08/2013
  • Issued: 06/17/2014
  • Est. Priority Date: 01/21/2010
  • Status: Active Grant
First Claim
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1. A method for compensating a touch image for a negative pixel effect, the method comprising:

  • acquiring a touch image from a touch sensor panel;

    analyzing negative pixel values, indicative of a grounding condition of an object touching or in close proximity to the touch sensor panel, of the touch image to determine a compensation factor;

    applying the determined compensation factor to the touch image to produce a compensated image absent substantially all the negative pixel values, wherein the compensation factor is based on the acquired touch image and the grounding condition; and

    selectively scaling the compensated image or the touch image to provide image display consistency.

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