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Method and device for detecting a device in a wireless power transmission system

  • US 10,312,750 B2
  • Filed: 05/14/2010
  • Issued: 06/04/2019
  • Est. Priority Date: 05/25/2009
  • Status: Active Grant
First Claim
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1. A method of detecting a receiver by a transmitter via a capacitance change, the method comprising:

  • providing, in the transmitter, a first transmission coil as a first electrode;

    providing, in the transmitter, a second electrode;

    forming a capacitor by the first electrode and the second electrode of the transmitter;

    applying a voltage to any one of the electrodes;

    determining a position of the receiver with respect to the transmitter when the capacitance change of the capacitor is detected based on a current flowing through the capacitor.

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