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Wireless power transmitter and receiver

  • US 10,103,553 B2
  • Filed: 10/19/2015
  • Issued: 10/16/2018
  • Est. Priority Date: 10/22/2014
  • Status: Active Grant
First Claim
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1. A method of wireless power transfer, by a power transmitter transmitting power to a plurality of power receivers, the method comprising:

  • a selection phase for detecting each of the plurality of power receivers and sending a digital ping to each of the plurality of power receivers;

    an introduction phase for receiving a request from each of the plurality of power receivers for a free slot to send a control information (CI) packet,wherein each of the plurality of power receivers is allocated free slots at a specific location,wherein free slots allocated to different power receivers do not overlap with each other;

    a configuration phase for providing a series of locked slots to each of the plurality of power receivers;

    a negotiation phase for receiving at least one negotiation data packet from each of the plurality of power receivers using the series of locked slots provided to each of the plurality of power receivers;

    a power transfer phase for transmitting power to each of the plurality of power receivers; and

    a renegotiation phase for returning to the negotiation phase,wherein the renegotiation phase includes a phase for detecting a change of a charge status of a specific power receiver among the plurality of power receivers when any CI packet is not consecutively received during a predetermined number of free slots allocated to the specific power receiver.

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