TRANSMISSION POWER CONTROL METHODS AND DEVICES

    公开(公告)号:US20180288709A1

    公开(公告)日:2018-10-04

    申请号:US15476061

    申请日:2017-03-31

    CPC classification number: H04W52/18 H04M2250/12

    Abstract: Transmission power control methods and devices are described. In a transmission power control method, a specific absorption rate (SAR) is calculated based on a transmission power of the communication device and a proximity distance of the communication device with an external object. A time average specific absorption rate can be calculated based on the SAR. A power absorption budget value can be calculated based on the time average specific absorption rate and a time average specific absorption rate threshold value. Further, the transmission power of the communication device can be adjusted based on the power absorption budget value.

    COLLISION PREVENTION FOR VIRTUAL REALITY SYSTEMS

    公开(公告)号:US20180190027A1

    公开(公告)日:2018-07-05

    申请号:US15396463

    申请日:2016-12-31

    CPC classification number: G06T19/006 G06F3/011 G06F3/0346 G06T2215/16

    Abstract: Technology for virtual reality device for avoiding collisions during a virtual reality experience. The virtual reality device comprises an accelerometer configured to sense an acceleration of the virtual reality device and a gyroscope configured to sense an angular velocity and orientation of the virtual reality device. Further comprising one or more proximity sensors configured to detect an object. A processor may be configured to receive data from the one or more proximity sensors and predict a potential collision between a user of the virtual reality device and the object detected by the one or more proximity sensors. An alarm may generate an alert regarding the potential collision.

    WIRELESS CHARGING COIL PLACEMENT FOR REDUCED FIELD EXPOSURE

    公开(公告)号:US20170179731A1

    公开(公告)日:2017-06-22

    申请号:US14978386

    申请日:2015-12-22

    Abstract: An apparatus is described herein. The apparatus includes a power transmit unit coil and an active shielding coil. The power transmit unit coil includes a set of main windings, positioned at a first location on a structure, to carry a first current in a first direction, wherein the first current is to cause an electromagnetic field to emanate from the power transmit unit coil. The active shielding coil is positioned at a second location on the structure and is to carry a second current in a direction substantially opposite the first direction wherein the second current is to cause a reduction of the size of the electromagnetic field.

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