Portable wireless charging pad

  • US 9,812,890 B1
  • Filed: 12/30/2014
  • Issued: 11/07/2017
  • Est. Priority Date: 07/11/2013
  • Status: Active Grant
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First Claim
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1. A method for wireless charging, the method comprising:

  • receiving, by at least one receiver antenna of a near-field cordless charging pad, energy from a first pocket of energy formed from constructive interference of a first plurality of power waves emitted from a first plurality of transmitter antennas of a far-field wireless power transmitter that is distinct from the near-field cordless charging pad;

    charging, using the energy received by the at least one receiver antenna from the first pocket of energy, a first battery of the near-field cordless charging pad; and

    transmitting, by a second plurality of transmitter antennas of the near-field cordless charging pad that is powered by the first battery, a second plurality of power waves to constructively interfere to form a second pocket of energy at a receiver, wherein the receiver is configured to convert energy of the second pocket of energy to charge a second battery of an electronic device that is coupled with the receiver, wherein the near-field cordless charging pad is in proximity of the electronic device.

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