Systems and methods for operating a plurality of antennas of a wireless power transmitter

  • US 10,396,604 B2
  • Filed: 12/26/2017
  • Issued: 08/27/2019
  • Est. Priority Date: 05/07/2014
  • Status: Active Grant
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First Claim
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1. A method for transmitting wireless power, comprising:

  • at a wireless power transmitter having a plurality of power-transmission antennas;

    concurrently transmitting, via at least a subset of the power-transmission antennas, respective transmission waves to each of a plurality of wireless power receivers;

    receiving a communication from an additional wireless power receiver;

    determining whether the plurality of antennas includes a sufficient number of antennas to concurrently power the plurality of wireless power receivers and the additional wireless power receiver;

    in accordance with a determination that the plurality of power-transmission antennas does not include a sufficient number of antennas to concurrently power the plurality of wireless power receivers and the additional wireless power receiver, switching from a concurrent power mode to a time division multiplexing mode to transmit respective transmission waves to the additional wireless power receiver and to each of the plurality of wireless power receivers;

    while operating in the time division multiplexing mode;

    determining whether at least one wireless power receiver of the plurality of wireless power receivers and the additional wireless power receiver is receiving less than a predetermined amount of power; and

    in accordance with determining that the at least one wireless power receiver is receiving less than the predetermined amount of power, ceasing to transmit respective transmission waves to the at least one wireless power receiver; and

    in accordance with a determination that the plurality of power-transmission antennas includes a sufficient number of antennas to concurrently power the plurality of wireless power receivers and the additional wireless power receiver, concurrently transmitting respective transmission waves to the additional wireless power receiver and to each of the plurality of wireless power receivers.

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