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METHOD AND APPARATUS FOR DETECTING HOLD CONDITION ON AN ACOUSTIC TOUCH SURFACE

  • US 20110025649A1
  • Filed: 05/14/2010
  • Published: 02/03/2011
  • Est. Priority Date: 05/22/2009
  • Status: Active Grant
First Claim
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1. A bending wave touch system, comprising:

  • at least one sensor coupled to a substrate and responsive to vibrations in the substrate, the at least one sensor outputting signals; and

    a controller configured to receive the signals from the at least one sensor, the controller further configured to identify touch coordinates based on high frequency components of the signals when a touch on the substrate comprises at least one of a tap, a drag and a lift-off, the controller further configured to identify a status of a hold condition of the touch based on at least two different time averages of low frequency components of the signals.

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