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TOUCHLESS INTERACTION

  • US 20140176467A1
  • Filed: 06/12/2012
  • Published: 06/26/2014
  • Est. Priority Date: 06/13/2011
  • Status: Active Grant
First Claim
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1. A portable electronic device comprising a transmitter for transmitting ultrasonic signals, a receiver for receiving ultrasonic signals reflected from an input object, and a processor for processing received ultrasonic signals to determine an input to the device, wherein the device is configured to reduce a transmission power of the ultrasonic signals transmitted by the transmitter in the event that the device determines that a reflection from an object other than the input object meets a predetermined criterion.

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