Portable terminal apparatus

• US 10,264,528 B2
• Filed: 11/29/2016
• Issued: 04/16/2019
• Est. Priority Date: 12/16/2015
• Status: Active Grant

• Current Assignee: Toshiba Tec Corporation (Toshiba Corporation)
• Original Assignee: Toshiba Tec Corporation (Toshiba Corporation)
• Inventors: Kato, Masakazu, Kanagawa, Masahiro
• Primary Examiner(s): Parihar, Suchin
• Application Number:
  US15/363,239
• Publication Number:
  US 20170181087A1
• Time in Patent Office: 868 Days
• Field of Search: 320108
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal

Abstract

A portable terminal apparatus according to an embodiment includes a power supply and a power receiving circuit that wirelessly receives electric power for charging the power supply. A first communication circuit transmits and receives information relating to receiving the electric power. A second communication circuit includes a communication antenna, a near field radio communication circuit and a switch arranged between the communication antenna and the near field radio communication circuit. The second communication circuit is selectively configured to communicate with a separate terminal device via near field radio communication. A controller controls the switch to disconnect the communication antenna from the near field radio communication circuit in response to the first communication circuit receiving the information relating to receiving the electric power.

Claims

1. A portable terminal apparatus, comprising:

a power supply;

a power receiving circuit configured to wirelessly receive electric power for charging the power supply;

a first communication circuit configured to transmit and receive information relating to receiving the electric power;

a second communication circuit including a communication antenna, a near field radio communication circuit and a switch arranged between the communication antenna and the near field radio communication circuit; and

a controller configured to control the switch to disconnect the communication antenna from the near field radio communication circuit in response to the first communication circuit receiving the information relating to receiving the electric power.

2. The portable terminal apparatus according to claim 1, wherein the first communication circuit transmits and receives the information relating to receiving the electric power during an authentication operation.

3. The portable terminal apparatus according to claim 2, wherein the power receiving circuit wirelessly receives the electric power at a first magnitude before the authentication operation is complete, and wirelessly receives the electric power at a second magnitude greater than the first magnitude after the authentication operation is complete.

4. The portable terminal apparatus according to claim 3, wherein the controller is further configured to control the switch to disconnect the communication antenna from the near field radio communication circuit after the authentication operation is complete and before the power receiving circuit wirelessly receives the electric power at the second magnitude.

5. The portable terminal apparatus according to claim 1, wherein the first communication circuit transmits and receives the information relating to receiving the electric power through the power receiving circuit.

6. The portable terminal apparatus according to claim 1, wherein:

the power receiving circuit includes a receiving coil and the first communication circuit, and

the first communication circuit transmits and receives the information relating to receiving the electric power through the receiving coil via load modulation.

7. A portable terminal apparatus, comprising:

a power supply;

a power receiving circuit configured to wirelessly receive electric power for charging the power supply;

a first communication circuit configured to transmit and receive information relating to receiving the electric power;

a second communication circuit including a communication antenna, a near field radio communication circuit and a switch arranged between the communication antenna and the near field radio communication circuit; and

a controller configured to control the switch to substantially prevent the near field radio communication circuit from wirelessly receiving the electric power in response to the first communication circuit receiving the information relating to receiving the electric power.

8. The portable terminal apparatus according to claim 7, wherein the first communication circuit transmits and receives the information relating to receiving the electric power during an authentication operation.

9. The portable terminal apparatus according to claim 8, wherein the power receiving circuit wirelessly receives the electric power at a first magnitude before the authentication operation is complete, and wirelessly receives the electric power at a second magnitude greater than the first magnitude after the authentication operation is complete.

10. The portable terminal apparatus according to claim 9, wherein the controller is further configured to control the switch to substantially prevent the near field radio communication circuit from wirelessly receiving the electric power after the authentication operation is complete and before the power receiving circuit wirelessly receives the electric power at the second magnitude.

11. The portable terminal apparatus according to claim 7, wherein the first communication circuit transmits and receives the information relating to receiving the electric power through the power receiving circuit.

12. The portable terminal apparatus according to claim 7, wherein:

the power receiving circuit includes a receiving coil and the first communication circuit, and

the first communication circuit transmits and receives the information relating to receiving the electric power through the receiving coil via load modulation.

13. The portable terminal apparatus according to claim 7, wherein the switch is controlled to change a resonant frequency of the second communication circuit.

14. The portable terminal apparatus according to claim 13, wherein:

when the second communication circuit communicates with a separate terminal device via near field radio communication, the second communication circuit resonates at a harmonic of the resonant frequency of the power receiving circuit, and

when the switch is controlled to substantially prevent the near field radio communication circuit from wirelessly receiving the electric power, the second communication circuit does not resonate at a harmonic of the resonant frequency of the power receiving circuit.

15. A portable terminal apparatus, comprising:

a power supply;

a power receiving circuit configured to wirelessly receive electric power for charging the power supply;

a first communication circuit configured to transmit and receive information relating to receiving the electric power;

a second communication circuit including a communication antenna, a near field radio communication circuit and an impedance variable circuit that changes impedance, wherein the impedance variable circuit is arranged between the communication antenna and the near field radio communication circuit; and

a controller configured to change impedance of the impedance variable circuit in response to the first communication circuit receiving the information relating to receiving the electric power.

16. The portable terminal apparatus according to claim 15, wherein

the impedance variable circuit includes a switch arranged in parallel with the communication antenna, and

the controller is configured to cause the impedance variable circuit to have a low impedance if the power receiving circuit starts wirelessly receiving the electric power.

17. The portable terminal apparatus according to claim 15, wherein

the impedance variable circuit includes a capacitor arranged in series with the communication antenna, and a switch arranged in parallel with the capacitor, and

the controller is configured to cause the impedance variable circuit to have a low impedance if the power receiving circuit starts wirelessly receiving the electric power.

18. The portable terminal apparatus according to claim 17, wherein the controller controls the impedance variable circuit to resonate at a harmonic of the frequency used in the near field radio communication when the power receiving circuit is not wirelessly receiving the electric power, and controls the impedance variable circuit to not resonate at a harmonic of the frequency of the communication antenna from resonance frequency when the power receiving circuit is wirelessly receiving the electric power.

19. The portable terminal apparatus according to claim 15, wherein the first communication circuit transmits and receives the information relating to receiving the electric power through the power receiving circuit.

20. The portable terminal apparatus according to claim 15, wherein:

the power receiving circuit includes a receiving coil and the first communication circuit, and

the first communication circuit transmits and receives the information relating to receiving the electric power through the receiving coil via load modulation.