Induction type power supply device

• US 8,098,043 B2
• Filed: 04/27/2009
• Issued: 01/17/2012
• Est. Priority Date: 04/28/2008
• Status: Active Grant

• Current Assignee: Fu Da Tong Technology Co., Ltd.
• Original Assignee: Fu Da Tong Technology Co., Ltd.
• Inventors: Lin, Jung-Tsung
• Primary Examiner(s): Phan, Huy Q
• Assistant Examiner(s): Allgood, Alesa
• Application Number:
  US12/430,880
• Publication Number:
  US 20090267561A1
• Time in Patent Office: 995 Days
• Field of Search: 320/108
• US Class Current: 320/108
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction

Abstract

An induction type power supply device includes a power supply base unit having a connection interface connectable, an oscillator circuit for producing an AC signal upon connection of the connection interface to an electric outlet, a driver circuit for amplifying the AC signal and a primary inductor for obtaining a resonant frequency and releasing the AC signal, and an attached induction device placed on the power supply base unit and having a secondary inductor for receiving the AC signal from the primary inductor by means of magnetic induction, a rectifier filter circuit for converting the AC signal into a DC power supply, a power management circuit for regulating the DC power supply subject to a predetermined voltage and current value and a connection device for the connection of an external mobile electronic apparatus and for outputting the regulated DC power supply from the power management circuit to the connected external mobile electronic apparatus.

Claims

1. An induction type power supply device, comprising:

a power supply base unit, said power supply base unit comprising a connection interface connectable to an electric outlet to obtain city power supply, an oscillator circuit adapted for producing an AC signal upon connection of said connection interface to an electric outlet, a driver circuit adapted for amplifying said AC signal, and a primary inductor adapted for obtaining a resonant frequency and releasing said AC signal; and

an attached induction device, said attached induction device comprising a secondary inductor adapted for receiving said AC signal from said primary inductor by means of magnetic induction, a rectifier filter circuit adapted for converting said AC signal into a DC power supply, a power management circuit adapted for regulating said DC power supply subject to a predetermined voltage and current value, and a connection device for the connection of an external mobile electronic apparatus and for outputting the regulated DC power supply from said power management circuit to the connected external mobile electronic apparatus;

wherein said primary inductor comprises a primary resonant circuit adapted to obtain resonance, and a primary coil adapted for receiving said AC signal from said primary resonant circuit and transmitting said AC signal to said secondary inductor of said attached induction device; and

wherein said power supply base unit further comprises a feedback circuit and a primary control circuit, said feedback circuit feeding back said AC signal to said primary control circuit for analysis and comparison with a predetermined reference resonance, said primary control circuit outputting a control signal to said oscillator circuit to regulate the resonant frequency subject to the comparison result made.

2. The induction type power supply device as claimed in claim 1, wherein said attached induction device further comprises a charging module electrically connected in series between said rectifier filter circuit and said power management circuit, said charging module comprising a storage battery electrically connected to said power management circuit for power output and a charging circuit adapted for charging said storage battery with the DC power supply outputted by said rectifier filter circuit.

3. The induction type power supply device as claimed in claim 1, wherein said induction device is a universal serial bus.

4. The induction type power supply device as claimed in claim 1, wherein said induction device is a mini universal serial bus.

5. The induction type power supply device as claimed in claim 1, wherein said mobile electronic apparatus is a digital camera.

6. The induction type power supply device as claimed in claim 1, wherein said mobile electronic apparatus is a cellular telephone.

7. The induction type power supply device as claimed in claim 1, wherein said mobile electronic apparatus is a music player.

8. The induction type power supply device as claimed in claim 1, wherein said power supply base unit further comprises a signal processing module, said signal processing module comprising a detection circuit, a signal processing circuit, a code-decode circuit and a frequency mixer circuit connected in series;

when said connection interface transmits an external media signal to said primary control circuit, said primary control circuit converts the media signal into a data signal, and then said code-encode circuit encodes the data signal, and then said frequency signal mixer circuit mixes the encoded data signal with a predetermined radio frequency signal and sends the mixed signal to said primary inductor;

said detection circuit is adapted to receive a modulated data signal from said primary inductor and to remove the radio frequency signal by means of frequency demodulation, and then to send the demodulated data signal to said signal processing circuit, which processes the data signal for enabling the data signal to be decoded by said encode-decode circuit and sent back to said primary control circuit for converting into a media data for output through said connection interface.

9. The induction type power supply device as claimed in claim 1, wherein said attached induction device further comprises a signal processing module, said signal processing module comprising a signal processing circuit adapted to receive a modulated data signal from said secondary inductor and to demodulate the data signal, and a secondary control circuit adapted to convert the data signal into a media signal for output through said connection device.

10. The induction type power supply device as claimed in claim 9, wherein said attached induction device further comprises a memory electrically connected with said secondary control circuit.