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Near field communication and wireless charging device and switching method using the same

  • US 9,608,473 B2
  • Filed: 07/07/2014
  • Issued: 03/28/2017
  • Est. Priority Date: 07/07/2014
  • Status: Active Grant
First Claim
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1. A near field communication and wireless charging device comprising:

  • a coil configured to receive electromagnetic waves;

    a tuning module electrically connected to the coil, wherein the tuning module comprises;

    a first tuning element electrically connected to the near field communication module and the coil; and

    a second tuning element electrically connected to the wireless charging module and the coil, wherein a capacitance of the first tuning element is smaller than a capacitance of the second tuning element;

    a near field communication module comprising;

    an attenuator configured to attenuate the energy of the electromagnetic waves transmitted from the tuning module; and

    a near field communication control circuit electrically connected to the attenuator to process near field communication information of the electromagnetic waves attenuated by the attenuator;

    a wireless charging module; and

    a power storage device electrically connected to the wireless charging module,wherein the electromagnetic waves are capable of magnetically coupling to the coil, such that the coil transmits signals of the electromagnetic waves to the near field communication module through the tuning module, or transmits the energy of the electromagnetic waves to the power storage device through the tuning module and the wireless charging module.

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