Electronic device including non-contact charging module and near field communication antenna

• US 10,204,734 B2
• Filed: 02/15/2018
• Issued: 02/12/2019
• Est. Priority Date: 11/02/2011
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Hirobe, Takanori, Uejima, Hiroyuki, Koyanagi, Yoshio
• Primary Examiner(s): Jeanglaude, Jean B
• Application Number:
  US15/898,045
• Publication Number:
  US 20180174747A1
• Time in Patent Office: 362 Days
• Field of Search: 343720
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01Q 1/2208 associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems methods or arrangements for sensing record carriers, e.g. for reading patterns G06K7/00; record carrier for use with machines and with at least a part designed to carry digital markings G06K19/00
• 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 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/248 provided with an AC/DC converting device, e.g. rectennas
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 1/521 reducing the coupling between adjacent antennas
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 5/40 Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H01Q 7/06 with core of ferromagnetic material H01Q7/02 takes precedence
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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 5/24 Inductive coupling
• CPC Class Codes: H04B 5/263 Multiple coils at either side
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 : for data transfer in combination with power transfer

Abstract

An electronic device having a communication capability is provided. The electronic device includes a housing having a generally rectangular shape in a plan view of the housing, and a non-contact charging module included in the housing. The non-contact charging module includes (i) a wireless charging coil having a substantially planar shape and formed of a wound electrical wire, and (ii) a magnetic sheet that overlaps with the wireless charging coil in the plan view of the housing. The electronic device further includes a Near Field Communication (NFC) antenna included in the housing and including an NFC coil formed of a wound electrical wire, and a guide having a generally rectangular outer shape in the plan view of the housing. The guide has a hole and the wireless charging coil is arranged in the hole of the guide.

Claims

1. An electronic device having a communication capability, the electronic device comprising:

a housing having a generally rectangular shape in a plan view of the housing;

a non-contact charging module included in the housing and including;

(i) a wireless charging coil having a substantially planar shape and formed of a wound electrical wire, and

(ii) a magnetic sheet that overlaps with the wireless charging coil in the plan view of the housing;

a Near Field Communication (NFC) antenna included in the housing and including an NFC coil formed of a wound electrical wire; and

a guide having a generally rectangular outer shape in the plan view of the housing, the guide having a first thickness along a thickness direction that is perpendicular to the substantially planar shape of the wireless charging coil;

wherein the guide has a hole having a second thickness less than the first thickness along the thickness direction and being defined by an inner periphery of the guide, in which the wireless charging coil is received.

2. The electronic device of claim 1, wherein the hole is shaped to generally follow an outer shape of the wireless charging coil.

3. The electronic device of claim 2, wherein the outer shape of the wireless charging coil has a generally circular shape, and the hole is shaped to follow the generally circular shape of the wireless charging coil.

4. The electronic device of claim 1, wherein the hole has a generally circular shape.

5. The electronic device of claim 1, wherein the NFC antenna is arranged adjacent to and outside of the wireless charging coil.

6. The electronic device of claim 1, wherein the wireless charging coil has a first resonant frequency and the NFC coil has a second resonant frequency different from the first resonant frequency.

7. The electronic device of claim 6, wherein the first resonant frequency of the wireless charging coil is lower than the second resonant frequency of the NFC coil.

8. The electronic device of claim 1, wherein a number of windings included in the wireless charging coil is greater than a number of windings included in the NFC coil.

9. The electronic device of claim 1, wherein a power transfer frequency of the wireless charging coil is different from a communication frequency of the NFC coil.

10. The electronic device of claim 1, wherein the NFC coil is formed of the wound electrical wire and including a substrate.

11. The electronic device of claim 1, wherein at least a portion of the NFC coil is disposed outside of the magnetic sheet.

12. The electronic device of claim 1, wherein at least a portion of the NFC coil is disposed on a second magnetic sheet different from the magnetic sheet of the non-contact charging module.

13. The electronic device of claim 1, wherein the NFC coil is configured to perform communication by electromagnetic induction.

14. The electronic device of claim 1, wherein an outer shape of the wireless charging coil is different from an outer shape of the NFC coil.

15. The electronic device of claim 1, wherein terminal ends of the wireless charging coil and terminal ends of the NFC coil extend in the same direction.