Wireless power transmission with selective range

  • US 10,148,133 B2
  • Filed: 07/20/2015
  • Issued: 12/04/2018
  • Est. Priority Date: 07/06/2012
  • Status: Active Grant
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First Claim
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1. A method of wirelessly delivering power to an electronic device, the method comprising:

  • at a wireless power transmitter that includes at least two wireless-power-transmitting antennas and at least one data-receiving antenna;

    defining a wireless charging area at a range of distance away from the wireless power transmitter;

    obtaining, via the at least one data-receiving antenna, data included in a signal received from a wireless power receiver coupled with the electronic device;

    determining a location of the wireless power receiver based upon the data included in the signal received from the wireless power receiver; and

    in response to determining that the location of the wireless power receiver is within the wireless charging area, transmitting, via the at least two wireless-power-transmitting antennas, a set of radio frequency (RF) power waves that;

    constructively interfere within the wireless charging area at the location of the wireless power receiver; and

    destructively interfere to form a null-space outside of the wireless charging area.

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