SIGNALING CHARGING IN WIRELESS POWER ENVIRONMENT

  • US 20090286475A1
  • Filed: 10/10/2008
  • Published: 11/19/2009
  • Est. Priority Date: 05/13/2008
  • Status: Active Grant
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First Claim
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1. A method of wireless power transfer, comprising:

  • generating an electromagnetic field at a resonant frequency of a transmitter to create a coupling-mode region within a near field of the transmitter during a synchronization portion of a time-multiplexed recurring period; and

    during a power transmission portion of the time-multiplexed recurring period;

    continuing the generating the electromagnetic field when there is at least one receiver within the coupling-mode region designated to accept power from the electromagnetic field; and

    disabling the generating the electromagnetic field when there are no receivers within the coupling-mode region designated to accept power from the electromagnetic field.

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