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System and method for interference avoidance for a display device comprising an integrated sensing device

  • US 10,073,568 B2
  • Filed: 09/27/2012
  • Issued: 09/11/2018
  • Est. Priority Date: 08/15/2012
  • Status: Active Grant
First Claim
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1. A processing system for a display device having an integrated capacitive sensing device, the processing system comprising:

  • a driver module comprising driver circuitry coupled to a plurality of common electrodes configured to be driven for display updating and capacitive sensing, wherein the driver module is configured to;

    drive a first common electrode for display updating a first display line during a first display line update period of a first display frame, the first display frame occurring at a pre-determined display frame rate,drive a second common electrode for display updating a second display line during a second display line update period of the first display frame,drive a first common electrode set comprising at least one of the plurality of common electrodes for capacitive sensing at a capacitive frame rate during a first non-display update period of the first display frame, the first non-display update period occurring after the first display line update period and before the second display line update period, and the first non-display update period being at least as long as the first display line update period, wherein display updating is paused during the first non-display update period;

    operate a second common electrode set comprising at least one of the plurality of common electrodes for interference detection during a second non-display update period;

    a receiver module coupled to a plurality of receiver electrodes and configured to receive first resulting signals with the plurality of receiver electrodes during the first non-display update period and second resulting signals during the second non-display update period; and

    a determination module configured to determine an interference measurement based at least in part on the second resulting signals, wherein an amount of the first non-display update period which is used for capacitive sensing is adjusted based on the interference measurement.

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