SELECTIVE SPECIFIC ABSORPTION RATE ADJUSTMENT
First Claim
1. An electronic device comprising:
- an RF transmitter;
a proximity sensor that generates a proximity signal dependent on a capacitance measurement influenced by one or more ambient environmental conditions of the proximity sensor and dependent on proximity of an object in a proximity field of the proximity sensor;
a proximity detection subsystem communicatively coupled to the proximity sensor and the RF transmitter, the proximity detection subsystem adjusting the proximity signal by filtering out effects of the one or more ambient environmental conditions from the proximity signal, the adjusted proximity signal signaling the RF transmitter with one or more object identification signals to adjust transmission power of the RF transmitter.
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Accused Products
Abstract
An electronic device provides a capability of distinguishing between human tissue and a non-human object in proximity of a transmission source. In this manner, transmission power adjustments to the transmission source can be made selectively, depending on whether human tissue or a non-human object is detected in the proximity of the RF transmitter. Distinguishing between human tissue and other non-human-tissue objects in proximity of the transmission source provides for selective control of SAR adjustments. Accordingly, an electronic device can avoid certain communication performance reductions introduced by decreases in transmission power effected to comply with SAR standards by reducing transmission power when human tissue is detected in the proximity but not reducing transmission power when a non-human object (but no human tissue) is detected in the proximity.
285 Citations
20 Claims
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1. An electronic device comprising:
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an RF transmitter; a proximity sensor that generates a proximity signal dependent on a capacitance measurement influenced by one or more ambient environmental conditions of the proximity sensor and dependent on proximity of an object in a proximity field of the proximity sensor; a proximity detection subsystem communicatively coupled to the proximity sensor and the RF transmitter, the proximity detection subsystem adjusting the proximity signal by filtering out effects of the one or more ambient environmental conditions from the proximity signal, the adjusted proximity signal signaling the RF transmitter with one or more object identification signals to adjust transmission power of the RF transmitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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generating a proximity signal from a proximity sensor of an electronic device, the proximity signal of the proximity sensor being dependent on a capacitance measurement influenced by one or more ambient environmental conditions of the proximity sensor and dependent on a presence of an object in a field of the proximity sensor; adjusting the proximity signal by filtering out effects of the one or more ambient environmental conditions from the proximity signal based on a reference signal generated from an environmental conditions sensor positioned in proximity of an RF transmitter and the proximity sensor, the reference signal being independent of an object in the field of the proximity sensor; and signaling the RF transmitter with one or more object identification signals to adjust transmission power of the RF transmitter based on the adjusted proximity signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An electronic device comprising:
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a proximity sensor that generates a proximity signal, the proximity signal of the proximity sensor being dependent on a capacitance measurement influenced by one or more ambient environmental conditions on the proximity sensor and detection of an object in a proximity field of the proximity sensor; an ambient environmental conditions sensor positioned in proximity of the proximity sensor, the ambient environmental conditions sensor generating a reference signal, the reference signal being independent of an object in the proximity field of the ambient environmental conditions sensor; a proximity detection subsystem communicatively coupled to the proximity sensor and the ambient environmental conditions sensor, the proximity detection subsystem adjusting the proximity signal by filtering out effects of the one or more ambient environmental conditions from the proximity signal; and an RF transmitter communicatively coupled to the proximity sensor, the ambient environmental sensor, and the proximity detection subsystem, the RF transmitter adjusting transmission power based on the adjusted proximity signal. - View Dependent Claims (19, 20)
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Specification