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Portable Electronic Device Having Self-Calibrating Proximity Sensors

  • US 20100164479A1
  • Filed: 12/29/2008
  • Published: 07/01/2010
  • Est. Priority Date: 12/29/2008
  • Status: Active Grant
First Claim
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1. A method of a portable electronic device for self-calibration of a proximity sensor, the method comprising:

  • obtaining a background measurement by the proximity sensor, wherein the background measurement is a measure of a received signal when no signal is transmitted by the proximity sensor;

    adjusting a detection threshold of the proximity sensor based on the background measurement, the detection threshold associated with a sensitivity of the proximity sensor to environmental conditions;

    emitting a source signal by the proximity sensor based on the adjusted detection threshold of the proximity sensor; and

    receiving a return signal by the proximity sensor corresponding to the source signal.

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