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Method of protecting power receiver and related wireless charging device

  • US 9,507,969 B2
  • Filed: 02/24/2014
  • Issued: 11/29/2016
  • Est. Priority Date: 02/22/2013
  • Status: Active Grant
First Claim
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1. A method for a power transmitter for protecting a power receiver from being taken without permission while charged wirelessly, the method comprising:

  • the power transmitter transmitting wireless power to the power receiver for wireless charging;

    the power transmitter constantly receiving a feedback from the power receiver, wherein the feedback is included in a control error packet (CEP) for sending to the power transmitter during wireless charging, and the feedback is sent periodically or non-periodically;

    the power transmitter detecting whether the wireless charging is interrupted by determining that the wireless charging is interrupted when the power transmitter does not receive the feedback for more than a specific time; and

    the power transmitter starting a protection function if the power transmitter detects that the wireless charging is interrupted and an authorized remove notification signal has not been received from the power receiver;

    wherein the authorized remove notification signal is received via an end power transfer packet with a message code indicating that the power receiver is removed with authorization.

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