Mobile terminal including wireless charging module and battery pack

Patent metadata

Field	Value
Publication number	US-9935481-B2
Application number	US-201314376574-A
Country	US
Kind code	B2
Filing date	Feb 1, 2013
Priority date	Feb 17, 2012
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

A mobile terminal is provided, which includes a wireless charging module, a battery pack, and a circuit board substrate. The wireless charging module includes a charging coil formed of a wound conducting wire and a communication coil placed adjacent to the charging coil. The wireless charging module has a substantially planar shape. The battery pack has a substantially planar shape and is configured to store power from the wireless charging module. The circuit board substrate is configured to control operation of the mobile terminal. The wireless charging module overlaps with each of the circuit board substrate and the battery pack.

First claim

The invention claimed is:

1. A mobile terminal comprising:
a wireless charging module including a charging coil formed of a wound conducting wire and a communication coil placed adjacent to the charging coil, the wireless charging module having a substantially planar shape, wherein a distance between the communication coil and the charging coil is non-uniform;
a battery pack having a substantially planar shape and configured to store power from the wireless charging module; and
a circuit board substrate configured to control operation of the mobile terminal, wherein the wireless charging module overlaps with at least one of the circuit board substrate and the battery pack, and the circuit board substrate does not overlap with the battery pack.

2. The mobile terminal according to claim 1 , wherein a number of turns of the charging coil is greater than a number of turns of the communication coil.

3. The mobile terminal according to claim 1 , wherein the charging coil is formed in a substantially polygonal shape.

4. The mobile terminal according to claim 3 , wherein the charging coil is formed in a substantially rectangular shape.

5. The mobile terminal according to claim 4 , wherein the charging coil is formed in a substantially square shape.

6. The mobile terminal according to claim 1 , wherein the charging coil is formed in an oval shape or a circular shape.

7. The mobile terminal according to claim 1 , wherein the charging coil is formed of the conducting wire that is a Litz wire.

8. The mobile terminal according to claim 1 , wherein the charging coil is formed to define a hollow portion surrounded by the wound conducting wire.

9. The mobile terminal according to claim 8 , wherein the hollow portion has a substantially polygonal shape.

10. The mobile terminal according to claim 9 , wherein the hollow portion has a substantially rectangular shape.

11. The mobile terminal according to claim 10 , wherein the hollow portion has a substantially square shape.

12. The mobile terminal according to claim 8 , wherein the hollow portion has an oval shape or a circular shape.

13. The mobile terminal according to claim 8 , wherein the largest linear dimension of the hollow portion is greater than 15.5 mm.

14. The mobile terminal according to claim 8 , further comprising a magnetic sheet on which the charging coil is mounted.

15. The mobile terminal according to claim 14 , wherein the magnetic sheet has a raised portion that faces the hollow portion of the charging coil.

16. The mobile terminal according to claim 14 , wherein the magnetic sheet includes a slit in which two end portions of the conducting wire are received.

17. The mobile terminal according to claim 14 , wherein a combined thickness of the charging coil and the magnetic sheet is between 0.6 mm and 1.0 mm.

18. The mobile terminal according to claim 1 , wherein the communication coil is configured to perform near field communication.

19. The mobile terminal according to claim 1 , wherein the communication coil is configured to perform communication by electromagnetic induction.

20. The mobile terminal according to claim 1 , wherein the wireless charging module overlaps with the circuit board substrate.

21. The mobile terminal according to claim 1 , wherein the wireless charging module overlaps with the battery pack.

22. The mobile terminal according to claim 1 , wherein the wireless charging module overlaps with both the circuit board substrate and the battery pack.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Yamaguchi Shuichiro
• Tabata Kenichiro
• Fujimura Munenori
• Hidaka Akio
• Naruse Takumi

Classifications

• H02J50/005

  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 title

• H02J50/90

  involving detection or optimisation of position, e.g. alignment · CPC title

• H02J7/731

  specially adapted for holding portable devices containing batteries (H02J7/751 takes precedence) · CPC title

• H02J7/42

  with electronic devices having internal batteries, e.g. mobile phones · CPC title

• H02J7/00

  Circuit arrangements for charging or discharging batteries or for supplying loads from batteries · CPC title