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ESD detection on a touch input device

  • US 10,203,783 B2
  • Filed: 06/11/2015
  • Issued: 02/12/2019
  • Est. Priority Date: 09/10/2012
  • Status: Active Grant
First Claim
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1. A method for detecting an occurrence of an ESD event on a touch input device, the method comprising:

  • applying stimulation signals to a plurality of drive lines of a touch sensor panel;

    acquiring a touch image of the touch sensor panel wherein the touch image comprises a plurality of sensed values based on the stimulation signals, the plurality of sensed values including at least one of an ESD value corresponding to an ESD event and one or more touch values corresponding to one or more touch or proximity events;

    for each of the plurality of sensed values in the touch image, categorizing the sensed value as being an ESD event when the sensed value is greater than a pre-determined threshold and categorizing the sensed value as being one or more touch events when the sensed value does not exceed the pre-determined threshold; and

    when the sensed value is categorized as being an ESD event, ignoring the touch or proximity event acquired during the occurrence of the ESD event.

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