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Dynamic touch sensor scanning for false border touch input detection

  • US 9,489,097 B2
  • Filed: 01/23/2015
  • Issued: 11/08/2016
  • Est. Priority Date: 01/23/2015
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • performing, at a device having a touch screen display, a mutual capacitance scan of rows and columns of an array of capacitive touch sensors associated with the touch screen display;

    detecting, by analysis of results from the performance of the mutual capacitance scan, presence of touch input adjacent a border of the touch screen display during receipt of additional touch input by a user to control the device;

    in response to detecting the presence of the touch input adjacent the border of the touch screen display, performing a self capacitance scan with a subset of the rows and with a subset of the columns that correspond to an area of the touch screen display adjacent the border;

    analyzing results of the self capacitance scan to identify that the touch input adjacent the border of the touch screen display is an accidental or false touch input on the touch screen display corresponding to the user grasping the device; and

    ignoring the detected touch input made with the mutual capacitance scan adjacent the border of the touch screen display.

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