Wireless power receiving device

• US 8,339,096 B2
• Filed: 11/13/2007
• Issued: 12/25/2012
• Est. Priority Date: 11/20/2006
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Osada, Takeshi
• Primary Examiner(s): Assouad, Patrick
• Assistant Examiner(s): Chung, Steve T
• Application Number:
  US11/979,994
• Publication Number:
  US 20090308933A1
• Time in Patent Office: 1,869 Days
• Field of Search: 307/104, 343/702, 370/339, 375/267, 455/437, 379/443, 320/108
• US Class Current: 320/108
• CPC Class Codes: G06K 19/0701 at least one of the integrated circuit chips comprising an arrangement for power management
• CPC Class Codes: G06K 19/0702 the arrangement including a battery
• CPC Class Codes: G06K 19/0715 the arrangement including means to regulate power transfer to the integrated circuit
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• CPC Class Codes: G06K 19/0724 the arrangement being a circuit for communicating at a plurality of frequencies, e.g. for managing time multiplexed communication over at least two antennas of different types
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• CPC Class Codes: G06K 19/07767 the first and second communication means being two different antennas types, e.g. dipole and coil type, or two antennas of the same kind but operating at different frequencies
• CPC Class Codes: H01Q 1/2225 used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
• CPC Class Codes: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence
• CPC Class Codes: H01Q 9/27 Spiral antennas
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/27 characterised by the type of receiving antennas, e.g. rectennas
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

To provide a wireless power receiving device and an electronic device having the wireless power receiving device whose production costs do not increase even when frequency of electromagnetic waves received for power supply varies. Further, to provide a wireless power receiving device capable of power transmission without disconnection or poor connection when a load supplied with electricity and a battery connected to an antenna are manufactured in different steps. A power transmitter and receiver portion having first and second antenna circuits and a battery portion and a load portion having a third antenna circuit are provided to charge a battery of the battery portion with a first radio signal received at the first antenna circuit and transmit electricity stored in the battery portion as a second radio signal from the second antenna circuit to the third antenna circuit so that the third antenna circuit supplies electricity to the load.

Claims

1. A wireless power receiving device comprising:

a power transmitter and receiver portion including;

a first antenna circuit configured to receive a first wireless signal wirelessly;

a battery portion configured to be charged with electricity generated upon reception of the first wireless signal at the first antenna circuit, and

a second antenna circuit configured to transmit electricity stored in the battery portion as a second wireless signal, and

a load portion including;

a third antenna circuit configured to receive the second wireless signal, and

a load configured to be supplied with the second wireless signal received at the third antenna circuit.

2. A wireless power receiving device according to claim 1,

wherein the battery portion includes a rectifier circuit, a charging control circuit, a battery, and a discharging control circuit,

wherein the charging control circuit is configured to control charging of the battery with electricity generated upon input of the first wireless signal to the rectifier circuit, and

wherein the discharging control circuit is configured to control discharging of the electricity stored in the battery into the second antenna circuit.

3. A wireless power receiving device according to claim 1, wherein antennas of the first antenna circuit and the second antenna circuit are different in shape.

4. A wireless power receiving device according to claim 1, wherein the battery portion comprises one of a secondary battery and a capacitor.

5. A wireless power receiving device according to claim 1, wherein the battery portion is one of a lithium battery, a lithium polymer battery, a lithium ion battery, a nickel metal hydride battery, a nickel cadmium battery, an organic radical battery, a lead-acid battery, an air secondary battery, a nickel-zinc battery, a silver-zinc battery, and an electric double layer capacitor.

6. A wireless power receiving device according to claim 1, wherein the first wireless signal is a commercial radio wave in exterior space.

7. A wireless power receiving device according to claim 1, wherein the first wireless signal is an electromagnetic wave transmitted from a feeder.

8. A wireless power receiving device according to claim 1, wherein the second antenna circuit is configured to transmit the second wireless signal to the third antenna circuit by one of an electromagnetic coupling method and an electromagnetic induction method.

9. A wireless power receiving device according to claim 1, wherein the first antenna circuit includes a plurality of antennas, and

wherein the plurality of the antennas are different from each other in shape.

10. A wireless power receiving device according to claim 1, wherein the second antenna circuit includes an amplifier configured to amplify an amplitude of the second wireless signal by using electricity supplied from the battery portion.

11. A wireless power receiving device according to claim 1, wherein the second antenna circuit includes an oscillator configured to control a frequency of the second wireless signal.

12. A wireless power receiving device according to claim 1, wherein the load is an RF tag including a rectifier circuit, a power supply circuit, a signal processing circuit, and a fourth antenna circuit,

wherein a signal received at the fourth antenna circuit is processed by the signal processing circuit, and

wherein electricity for driving the signal processing circuit is generated from the second wireless signal input from the third antenna circuit to the power supply circuit through the rectifier circuit.

13. A wireless power receiving device according to claim 1, wherein the load portion includes a load connected to the third antenna circuit, and

wherein the load is an electronic device configured to be driven with intermittent power supply.

14. A wireless power receiving device comprising:

a power transmitter and receiver portion including;

a first antenna circuit configured to receive a communication signal wirelessly;

a battery portion configured to be charged with electricity generated upon reception of the communication signal at the first antenna circuit;

a signal transmitter and receiver portion configured to amplify an amplitude of the communication signal by using the electricity stored in the battery portion; and

a second antenna circuit configured to transmit the communication signal amplified by the signal transmitter and receiver portion as a wireless signal, and

a load portion including;

a third antenna circuit configured to receive the wireless signal;

a rectifier circuit configured to be supplied with the wireless signal received at the third antenna circuit;

a power supply circuit configured to generate electricity by using an output signal from the rectifier circuit; and

a signal processing circuit configured to be supplied with the wireless signal received at the third antenna circuit and the electricity from the power supply circuit.

15. A wireless power receiving device according to claim 14,

wherein the battery portion includes a rectifier circuit, a charging control circuit, a battery, and a discharging control circuit,

wherein the charging control circuit is configured to control charging of the battery with electricity generated upon input of the communication signal to the rectifier circuit, and

wherein the discharging control circuit is configured to control discharging of the electricity stored in the battery.

16. A wireless power receiving device according to claim 14, wherein antennas of the first antenna circuit and the second antenna circuit are different in shape.

17. A wireless power receiving device according to claim 14, wherein the signal transmitter and receiver portion includes a switch configured to control input or output of the communication signal to or from the signal transmitter and receiver portion, and an amplifier configured to amplify an amplitude of the communication signal.

18. A wireless power receiving device according to claim 14, wherein the battery portion comprises a secondary battery or a capacitor.

19. A wireless power receiving device according to claim 14, wherein the battery portion comprises one of a lithium battery, a lithium polymer battery, a lithium ion battery, a nickel metal hydride battery, a nickel cadmium battery, an organic radical battery, a lead-acid battery, an air secondary battery, a nickel-zinc battery, a silver-zinc battery, and an electric double layer capacitor.

20. A wireless power receiving device according to claim 14, wherein the communication signal is a signal transmitted from a reader/writer.

21. A wireless power receiving device according to claim 14, wherein the second antenna circuit is configured to transmit the wireless signal to the third antenna circuit by using one of an electromagnetic coupling method and an electromagnetic induction method.

22. A wireless power receiving device according to claim 14, wherein the first antenna circuit includes a plurality of antennas, and

wherein the plurality of the antennas are different from each other in shape.

23. A wireless power receiving device comprising:

a power transmitter and receiver portion comprising a battery portion and configured to receive a first wireless signal wirelessly for charging the battery portion with electricity of the first wireless signal; and

a plurality of electronic devices, each of the electronic devices provided adjacent to the power transmitter and receiver portion and configured to receive a second wireless signal wirelessly from the battery portion to supply an electricity to be consumed in the each of the electronic devices.

24. A wireless power receiving device according to claim 23 wherein each of the electronic devices is selected from the group consisting of a cell phone, a computer, a digital camera, an image reproduction device provided with a recording medium, a digital video camera, and a personal digital assistant.

25. A wireless power receiving device according to claim 23, wherein the battery portion comprises one of a secondary battery and a capacitor.

26. A wireless power receiving device according to claim 23, wherein the first wireless signal is a commercial radio wave in exterior space.

27. A wireless power receiving device according to claim 23, wherein the first wireless signal is an electromagnetic wave transmitted from a feeder.

28. A wireless power receiving device according to claim 23, wherein the battery portion comprises one of a lithium battery, a lithium polymer battery, a lithium ion battery, a nickel metal hydride battery, a nickel cadmium battery, an organic radical battery, a lead-acid battery, an air secondary battery, a nickel-zinc battery, a silver-zinc battery, and an electric double layer capacitor.

29. A cell phone comprising:

a body comprising a battery portion and configured to receive a first wireless signal wirelessly for charging the battery portion with electricity of the first wireless signal;

an audio output portion;

an audio input portion;

a display portion; and

an operating switch,

wherein at least one of the audio output portion, the audio input portion, the display portion, and the operating switch is provided adjacent to the body and configured to receive a second wireless signal wirelessly from the battery portion to supply an electricity to be consumed in the at least one of the audio output portion, the audio input portion, the display portion, and the operating switch.

30. A cell phone according to claim 29, wherein the battery portion comprises one of a secondary battery and a capacitor.

31. A cell phone according to claim 29, wherein the first wireless signal is a commercial radio wave in exterior space.

32. A cell phone according to claim 29, wherein the first wireless signal is an electromagnetic wave transmitted from a feeder.

33. A cell phone according to claim 29, wherein the battery portion comprises one of a lithium battery, a lithium polymer battery, a lithium ion battery, a nickel metal hydride battery, a nickel cadmium battery, an organic radical battery, a lead-acid battery, an air secondary battery, a nickel-zinc battery, a silver-zinc battery, and an electric double layer capacitor.