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Wireless power receiver

  • US 9,812,893 B2
  • Filed: 08/19/2016
  • Issued: 11/07/2017
  • Est. Priority Date: 07/14/2011
  • Status: Active Grant
First Claim
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1. A wireless power receiver configured to wirelessly receive charging power from a wireless power transmitter, the wireless power receiver comprising:

  • a power reception unit configured to wirelessly receive the charging power from the wireless power transmitter;

    a rectifier configured to rectify the charging power from the power reception unit;

    a load unit configured to store the rectified charging power from the rectifier;

    an impedance adjuster connected to the power reception unit, wherein the impedance adjuster and the rectifier are connected to each other in parallel;

    a switch configured to selectively connect the impedance adjuster to the power reception unit; and

    a controller configured to;

    control the switch not to connect the impedance adjuster to the power reception unit,detect a change of a charging mode for the load unit while the impedance adjuster is not connected to the power reception unit, andcontrol the switch to connect the impedance adjuster to the power reception unit for adjusting an impedance in the power reception unit according to the change of the charging mode.

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