Wireless power transmitters for transmitting wireless power and tracking whether wireless power receivers are within authorized locations

  • US 10,224,982 B1
  • Filed: 12/30/2014
  • Issued: 03/05/2019
  • Est. Priority Date: 07/11/2013
  • Status: Active Grant
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First Claim
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1. A method for wireless power transmission, the method comprising:

  • transmitting, by a set of a plurality of antennas of a transmitter, a plurality of power waves, such that at least a portion of the plurality of power waves is phase shifted by the transmitter to converge and constructively interfere with other power waves of the plurality of power waves to form a first constructive interference pattern at a first location of a receiver that is coupled with an electronic device;

    receiving, by a communications device of the transmitter, a signal from the receiver, the signal indicating a second location of the receiver;

    storing, by the transmitter, into a database configured to store device data associated with one or more electronic devices, the second location of the receiver, wherein the database is associated with a server that is remote from the transmitter;

    in accordance with a determination that the second location of the receiver is an authorized location for the receiver;

    determining, by the transmitter and based on the second location, phase adjustments for transmitting power waves that constructively interfere at the second location of the receiver;

    adjusting, by the transmitter, an additional portion of the plurality of power waves to have the phase adjustments that were determined by the transmitter such that the additional portion of the plurality of power waves is transmitted by the set of the plurality of antennas to converge and constructively interfere with other power waves of the plurality to form a second constructive interference pattern, distinct from the first constructive interference pattern, at the second location of the receiver indicated by the signal received from the receiver, wherein the receiver is configured to harvest energy from the first and second constructive interference patterns to at least partially power the electronic device; and

    in accordance with a determination that the second location of the receiver is not an authorized location for the receiver, providing by the transmitter a notification that the receiver is not in an authorized location.

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