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.

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.

Abstract: A system and method for interaction between an electronic writing device (102) and a wireless device (104) includes the electronic device (102) being capable of generating a keystroke signal (106). The system and method further includes the wireless device (102) receiving the keystroke signal (106) and executing an operation (168) in response thereto. The electronic writing device (102) includes a motion sensor (110) that generates a motion displacement signal (116), a toggle switch (112) that generates an engagement signal (118), a pressure sensor (114) that generates a depression signal (120) and an optical sensor (128). The wireless device (102) includes a receiver (162) that receives the keystroke signal (106) and a processor (164) that executes an operation in response thereto or may provide for operating in a bar code mode, such that a bar code may be scanned and the keystroke signal including a bar code signal.