ELECTRONIC DEVICE WITH PROXIMITY-BASED RADIO POWER CONTROL
First Claim
1. An electronic device, comprising:
- a proximity sensor that detects when objects are present within a given distance of the electronic device;
a radio-frequency antenna with which radio-frequency signals are transmitted with a transmit power; and
circuitry that adjusts the transmit power based at least partly on data from the proximity sensor.
1 Assignment
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Accused Products
Abstract
An electronic device such as a portable electronic device may have an antenna and associated wireless communications circuitry. A sensor such as a proximity sensor may be used to detect when the electronic device is in close proximity to a user'"'"'s head. Control circuitry within the electronic device may be used to adjust radio-frequency signal transmit power levels. When it is determined that the electronic device is within a given distance from the user'"'"'s head, the radio-frequency signal transmit power level may be reduced. When it is determined that the electronic device is not within the given distance from the user'"'"'s head, proximity-based limits on the radio-frequency signal transmit power level may be removed. Data may be gathered from a touch sensor, accelerometer, ambient light sensor and other sources for use in determining how to adjust the transmit power level.
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Citations
22 Claims
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1. An electronic device, comprising:
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a proximity sensor that detects when objects are present within a given distance of the electronic device; a radio-frequency antenna with which radio-frequency signals are transmitted with a transmit power; and circuitry that adjusts the transmit power based at least partly on data from the proximity sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A handheld electronic device operated by a user, comprising:
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an antenna with which radio-frequency signals are transmitted at a given transmit power; at least one sensor that generates sensor data that is indicative of whether at least part of the user is present within a given distance from the handheld electronic device; and control circuitry that controls the transmit power based at least partly on the sensor data. - View Dependent Claims (14, 15, 16, 17)
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18. A method of controlling radio-frequency cellular telephone signal transmit power through an antenna in a handheld electronic device that is used by a user having a head, wherein the handheld electronic device includes control circuitry, the method comprising:
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with a sensor in the handheld electronic device, determining whether the head of the user is present within a given distance of the handheld electronic device, when it is determined from the sensor that the head of the user is not present within the given distance of the handheld electronic device, establishing a first maximum allowable level for the transmit power with the control circuitry; and when it is determined from the sensor that the head of the user is present within the given distance of the handheld electronic device, establishing a second maximum allowable level for the transmit power with the control circuitry, wherein the second maximum allowable level for the transmit power is less than the first maximum allowable level for the transmit power. - View Dependent Claims (19, 20, 21, 22)
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Specification