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Vibrating substrate for haptic interface

  • US 8,780,053 B2
  • Filed: 03/19/2009
  • Issued: 07/15/2014
  • Est. Priority Date: 03/21/2007
  • Status: Active Grant
First Claim
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1. A haptic device having a substrate with a touch surface and one or more actuators that vibrate the substrate in a multiplicity of higher resonant modes, each of which has a high enough frequency to be inaudible and high enough amplitude to create a friction reduction effect at a plurality of vibrating regions on the substrate touch surface, wherein each of the one or more actuators provides vibration to more than one vibrating region, and wherein at least one of the higher resonant modes forms nodal lines that define vibrating regions on the substrate surface wherein the positions of the nodal lines are dependent upon the frequency of the respective higher resonant mode.

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