Portable wireless charging pad

  • US 9,800,080 B2
  • Filed: 07/21/2015
  • Issued: 10/24/2017
  • Est. Priority Date: 05/10/2013
  • Status: Active Grant
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First Claim
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1. A method for wireless charging comprising:

  • providing a cordless charging pad that includes a wireless power receiver and a wireless power transmitter;

    receiving, at the wireless power receiver of the cordless charging pad, energy from a constructive interference pattern formed by convergence of a plurality of radio frequency (RF) waves that are transmitted by a far-field wireless power transmitter, wherein the far-field wireless power transmitter is distinct and separate from the cordless charging pad;

    providing power, using the received energy, to the wireless power transmitter of the cordless charging pad; and

    wirelessly transmitting power, from the wireless power transmitter of the cordless charging pad, near a surface of the cordless charging pad when a receiver for an electronic device is positioned on top of the surface of the cordless charging pad.

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