Wireless charging system

Patent metadata

Field	Value
Publication number	US-2016276864-A1
Application number	US-201615074932-A
Country	US
Kind code	A1
Filing date	Mar 18, 2016
Priority date	Mar 20, 2015
Publication date	Sep 22, 2016
Grant date	—

Abstract

Various embodiments of the present disclosure relate to a wireless charging system. The wireless charging system may include: a system body mounted with a power transmission part including a cavity shielded by a conductive material, a power feeding radiator configured to feed power within the cavity to form a resonance mode, and a slot formed at a location with a maximum E-field by the power feeding radiator to form a power transmission route with E-field coupling; and an electronic device including a power reception part mounted on the system body to receive power from the slot through H-field coupling. Various embodiments may be made.

First claim

What is claimed is:

1 . A wireless charging system comprising:
a system body comprising: a power transmission part including a cavity shielded by a conductive material, a power feeding radiator configured to feed power within the cavity to form a resonance mode, and a slot formed at a location with a maximum E-field by the power feeding radiator to form a power transmission route through E-field coupling; and an electronic device including a power reception part mounted on the system body to receive power from the slot through H-field coupling.

2 . The system of claim 1 , wherein the electronic device includes an external metal frame on at least a portion thereof.

3 . The system of claim 2 , wherein the power reception part is disposed on at least a portion of the external metal frame.

4 . The system of claim 1 , wherein power is fed to a position where E-fields are concentrated within the cavity by using a power feeding radiator.

5 . The system of claim 4 , wherein maximum power is formed in the slot by using the power feeding radiator.

6 . The system of claim 1 , wherein the power reception part includes:
a dielectric board disposed on the external metal frame; and a transmission line formed on the dielectric board.

7 . The system of claim 6 , wherein, when the electronic device is mounted on the system body, the slot and the power reception part are disposed to face each other and to overlap with each other.

8 . The system of claim 6 , wherein one end of the transmission line is connected to a charging circuit, and a length between another end and the slot is determined to be impedance-matched with the charging circuit.

9 . The system of claim 1 , wherein, when the electronic device is mounted on the charging system, the external metal frame of the electronic device is disposed to be in contact with the conductive material, thereby grounding the external metal frame.

10 . The system of claim 2 , wherein further comprising:
a waveguide disposed on a wall face of the cavity to form a resonance mode within the cavity.

11 . The system of claim 10 , wherein an aperture is provided in a side wall of the cavity, to which the waveguide is connected.

12 . The system of claim 2 , wherein
the external metal frame is configured to form a portion of an external appearance of the electronic device

13 . A wireless charging system of an electronic device, comprising:
a charging system comprising:
a power transmission part including a cavity shielded by a conductive material,
a radiator disposed in the cavity,
a slot configured to feed power, and
an aperture configured to receive the power,
wherein the slot and the aperture are respectively formed at two locations with a maximum E-field on a side wall of the conductive material and are H-field coupled by feeding power from the radiator to form a power transmission route; and an electronic device including a power reception part mounted on the charging system to receive power from the aperture through H-field coupling.

14 . The system of claim 13 , wherein the radiator includes a loop antenna or a patch antenna.

15 . A wireless charging system comprising:
a system body comprising:
a power transmission part including a cavity shielded by a conductive material,
a power feeding radiator configured to feed power to the inside of the cavity, and
a slot formed at a location that with a maximum E-field by the power feeding radiator to form a power transmission route through E-field coupling; and
an electronic device including a power reception part mounted on the system body to receive power from the slot with E-field coupling.

16 . The wireless charging system of claim 15 , wherein the power reception part is opened at one side thereof.

17 . The system of claim 16 , wherein a charging circuit is connected to the opened portion.

18 . The system of claim 15 , wherein further comprising:
a waveguide disposed on the metallic material to feed power to the cavity.

19 . The system of claim 15 , wherein the external metal frame configured is to form a portion of an external appearance of the electronic device; and
wherein the power reception part includes a waveguide portion disposed on at least a portion of the external metal frame.

20 . The system of claim 19 , wherein the waveguide portion is configured to receive power through E-field coupling, and
an aperture is formed in a portion where the E-fields are concentrated.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Ha Dohyuk
• Lee Jung Yub
• KUM Junsig
• Lee Youngju

Classifications

• H02J7/731 Primary

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

• H02J7/025 Primary

  Electricity · mapped topic

• H02J50/20

  using microwaves or radio frequency waves · CPC title

• H02J50/70 Primary

  involving the reduction of electric, magnetic or electromagnetic leakage fields · CPC title

• H01F27/288

  Shielding · CPC title