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Ground detection for touch sensitive device

  • US 10,359,884 B2
  • Filed: 03/27/2017
  • Issued: 07/23/2019
  • Est. Priority Date: 07/16/2009
  • Status: Active Grant
First Claim
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1. A touch sensitive device comprising:

  • a touch sensor panel configured to sense one or more touch signals associated with a sensed touch; and

    a processor configured to;

    determine one or more characteristics of a touch of a touch image based on the one or more touch signals associated with the sensed touch, wherein the one or more characteristics are a location or an orientation of the touch of the touch image;

    determine whether the location or orientation of the touch of the touch image is indicative of at least one of a first grounding condition or a second grounding condition, wherein the first grounding condition is indicative of negative capacitance introduced into the device, and wherein the second grounding condition is not indicative of negative capacitance introduced into the device; and

    in accordance with a determination that the location or orientation of the touch of the touch image is indicative of the first grounding condition, apply compensation to one or more touch signals having one or more negative touch output values; and

    in accordance with a determination that the location or orientation of the touch of the touch image is indicative of the second grounding condition, forgo the compensation.

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