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Feedback for grounding independent haptic electrovibration

  • US 9,261,963 B2
  • Filed: 08/22/2013
  • Issued: 02/16/2016
  • Est. Priority Date: 08/22/2013
  • Status: Active Grant
First Claim
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1. A method of providing tactile feedback, comprising:

  • applying a haptic signal to a set of electrodes in a device;

    detecting, at a touch-sensitive screen of the device, a touch input;

    determining a displacement current from the touch input to the set of electrodes, the displacement current being an effect of an amplitude of the haptic signal and being based on a charge and discharge rate between a two parallel-plate capacitor, and the two-parallel plate capacitor being defined by the touch input and the set of electrodes; and

    modifying the haptic signal based on the determined displacement current.

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