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Wireless charging system and method

  • US 8,847,547 B2
  • Filed: 04/26/2013
  • Issued: 09/30/2014
  • Est. Priority Date: 12/24/2008
  • Status: Active Grant
First Claim
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1. A terminal comprising:

  • a first coil configured to charge a battery using an induction current induced to the first coil by a magnetic field generated by an external device adjacent to the terminal;

    a communication unit configured to transmit a control signal to the external device, the control signal being a command requesting the external device to move a location of a second coil formed in the external device; and

    a control unit configured to check a charging efficiency and to control the communication unit to transmit the control signal to the external device when the charging efficiency is less than a threshold.

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