发明名称 |
Electronic device with proximity-based radio power control |
摘要 |
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. |
申请公布号 |
US8818450(B2) |
申请公布日期 |
2014.08.26 |
申请号 |
US201313777955 |
申请日期 |
2013.02.26 |
申请人 |
Apple Inc. |
发明人 |
Caballero Ruben;Schlub Robert W. |
分类号 |
H04W52/24 |
主分类号 |
H04W52/24 |
代理机构 |
Treyz Law Group |
代理人 |
Treyz Law Group ;Treyz G. Victor;Wu Chih-Yun |
主权项 |
1. An electronic device, comprising:
a capacitive 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 capacitive proximity sensor, wherein the circuitry comprise transmitter circuitry that handles radio-frequency wireless transmissions in at least a first wireless communications band and a second wireless communications band and wherein the circuitry is configured to make radio-frequency wireless transmit power adjustments in the first wireless communications band at least partly based on changes that occur in radio-frequency wireless transmit power levels in the second wireless communications band. |
地址 |
Cupertino CA US |