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Wireless power system with capacitive proximity sensing

  • US 9,583,951 B2
  • Filed: 10/05/2015
  • Issued: 02/28/2017
  • Est. Priority Date: 08/17/2012
  • Status: Active Grant
First Claim
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1. A method of wireless power transmission comprising:

  • generating an electromagnetic field to wirelessly transfer power to a receive antenna, via a transmit antenna of a wireless power transmission system,exciting a first non-transmitting part of the wireless power transmission system, which is coupled to the transmit antenna; and

    detecting, in the presence of a non-charging object, a first change in a parameter indicative of a coupling between the non-charging object and the first non-transmitting part.

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