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Capacitive sensing during non-display update times

  • US 9,324,301 B2
  • Filed: 06/30/2015
  • Issued: 04/26/2016
  • Est. Priority Date: 09/07/2011
  • Status: Active Grant
First Claim
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1. A processing system for a display device comprising an integrated capacitive sensing device, the processing system comprising:

  • a driver module comprising driver circuitry, the driver module configured to drive a plurality of sensor electrodes for capacitive sensing, wherein each of the plurality of sensor electrodes comprises at least one common electrode of a plurality of common electrodes, the plurality of common electrodes configured to be driven for display updating and capacitive sensing during a display frame, wherein the display frame comprises a plurality of display line update periods, a first blanking period, a second blanking period and a third blanking period, wherein the first blanking period and the second blanking period occur before a last one of the plurality of display line update periods and the third blanking period occurs after the last one of the plurality of display line update periods and before a first display line update period of a second display frame and wherein a duration of the second blanking period is at least as long as one of the plurality of display line updates and is longer than the first blanking period.

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