Portable electronic device having self-calibrating proximity sensors
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United States of America Patent
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Oct 4, 2011
Grant Date -
Jul 1, 2010
app pub date -
Dec 29, 2008
filing date -
Dec 29, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A method of a portable electronic device for self-calibration of a proximity sensor. A background measurement is obtained by the proximity sensor and a detection threshold of the proximity sensor is adjusted based on the background measurement. The background measurement is a measure of a received signal when no signal is transmitted by the proximity sensor, and the detection threshold is associated with a sensitivity of the proximity sensor to environmental conditions. A source signal is emitted by the proximity sensor based on the adjusted detection threshold of the proximity sensor, and a return signal is received by the proximity sensor corresponding to the source signal. A function of the portable electronic device may be performed base don the received return signal.
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