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Wireless power transmission apparatus and wireless power transmission method

  • US 9,559,553 B2
  • Filed: 02/16/2016
  • Issued: 01/31/2017
  • Est. Priority Date: 02/16/2015
  • Status: Expired due to Fees
First Claim
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1. A wireless power transmission apparatus comprising:

  • a first power converting unit to generate high-frequency AC signals;

    a second power converting unit to generate low-frequency AC signals;

    a first coil receiving the high-frequency AC signals and transmitting a wireless power through a first power transmission scheme;

    a second coil receiving the low-frequency AC signals and transmitting the wireless power through a second power transmission scheme; and

    a control unit to control the first and second coils,wherein the control unit is configured to;

    activate the first power converting unit and transmit a detection signal for the first power transmission scheme to a wireless power reception apparatus through the first coil,detect a reception of a first response signal corresponding to the first detection signal during a first predetermined time period,determine a power transmission scheme of the wireless power reception apparatus as the first power transmission scheme, in response to a detection of the first response signal during the first predetermined time period,deactivate the first power converting unit, activate the second power converting unit, and transmit a second detection signal to the wireless power reception apparatus through the second coil, in response to no detection of the first response signal during the first predetermined time period,detect a reception of a second response signal corresponding to the second detection signal during a second predetermined time period, anddetermine the power transmission scheme of the wireless power reception apparatus as a second power transmission scheme, in response to a detection of the second response signal during the second predetermined time period.

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