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Detecting touch input and generating perceptible touch stimulus

  • US 8,791,800 B2
  • Filed: 05/12/2010
  • Issued: 07/29/2014
  • Est. Priority Date: 05/12/2010
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a body portion having a surface;

    at least one feedback electrode configured to provide a time varying feedback stimulus to a digit of a user that is traced across the feedback electrode;

    and a touch sensor arrangement for discriminating different user contacts on the surface;

    wherein the time varying feedback stimulus is provided by an applied time varying potential difference by modulating a frictional force applied to the digit of the user when the digit, contacting the surface, is traced across the surface.

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