NOISE REDUCTION IN CAPACITIVE TOUCH SENSORS

  • US 20110254802A1
  • Filed: 04/15/2010
  • Published: 10/20/2011
  • Est. Priority Date: 04/15/2010
  • Status: Active Grant
First Claim
Patent Images

1. A touch sensing display device, comprising:

  • a display;

    a display controller circuit including display scanning circuitry and a controller arranged to control a duty cycle of scanning of the display; and

    a capacitive touch sensor comprising at least one electrode in proximity to the display;

    a touch sensor controller circuit arranged to control a sensor acquisition duty cycle with respect to a signal from the capacitive touch sensor,wherein at least one of the controller circuits is configured such that a portion of each of the sensor acquisition duty cycles occurs within a period of reduced noise from a duty cycle of the scanning of the display.

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