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Acoustic Touch Signal Dispersion Mitigation

  • US 20130147768A1
  • Filed: 05/31/2012
  • Published: 06/13/2013
  • Est. Priority Date: 12/12/2011
  • Status: Active Grant
First Claim
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1. A touch input system comprising:

  • a substrate configured to support propagation of acoustic signals;

    a transducer in communication with the substrate and configured to transmit or receive the acoustic signals before or after the propagation; and

    an array of reflectors disposed on the substrate, each reflector being oriented on an angle to redirect the acoustic signals along a path toward or away from the transducer;

    wherein the transducer comprises a stepped interface for the redirected acoustic signals, the stepped interface comprising a set of interface elements distributed across a width of the acoustic signals and offset from one another along the path to compensate for the angle of the reflectors.

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