Wireless power transmitter and wireless power receiver

• US 9,419,477 B2
• Filed: 11/08/2013
• Issued: 08/16/2016
• Est. Priority Date: 11/08/2012
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Joon-Il, Kim, Hong-Kweun, Park, Se-Ho
• Primary Examiner(s): Garbowski, Leigh
• Application Number:
  US14/075,440
• Publication Number:
  US 20140125278A1
• Time in Patent Office: 1,012 Days
• Field of Search: None
• US Class Current: 1/1
• 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 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• 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

Abstract

Disclosed is a wireless power transmitter that includes a resonator that provides charging electric power to a wireless power receiver and a metal layer spaced apart from the resonator by a preset interval, with a line width of the resonator being smaller than the preset interval between the resonator and the metal layer.

Claims

1. A wireless power transmitter comprising:

a resonator that includes conductive lines configured to provide electric power to a wireless power receiver; and

a metal layer that includes an upper surface spaced apart from the resonator by a preset interval,

wherein a line width of conductive lines of the resonator is smaller than the preset interval.

2. The wireless power transmitter of claim 1, wherein the line width of the conductive lines of the resonator is less than or equal to 4.0 mm, and an interval between the conductive lines of the resonator is less than or equal to 4.0 mm.

3. The wireless power transmitter of claim 1, further comprising a mechanism having an upper surface on which the resonator is formed,

wherein the mechanism is formed of a dielectric material.

4. The wireless power transmitter of claim 1, wherein an air layer is provided between the resonator and the metal layer.

5. The wireless power transmitter of claim 1, wherein the metal layer is formed of one of gold, silver, copper, aluminum, iron, titanium, platinum and an alloy of one of gold, silver, copper, aluminum, iron, titanium and platinum.

6. The wireless power transmitter of claim 1, wherein the metal layer has electrical conductivity greater than or equal to 2.38×

10⁶ S/m at 20°

C.

7. The wireless power transmitter of claim 1, wherein the metal layer has electrical conductivity greater than or equal to 3.5×

10⁷ S/m at 20°

C.

8. The wireless power transmitter of claim 1, wherein the preset interval between the resonator and the upper surface of the metal layer is within a range of 0.1 mm to 4.0 mm.

9. The wireless power transmitter of claim 1, wherein the line width of each of the conductive lines is within a range of 0.1 mm to 4.0 mm, an interval between the conductive lines is within a range of 0.1 mm to 4.0 mm, and the preset interval between the resonator and the upper surface of the metal layer is within a range of 0.1 mm to 4.0 mm.

10. A wireless power receiver comprising:

a resonator that includes conductive lines configured to receive electric power from a wireless power transmitter; and

a metal layer that includes an upper surface spaced apart from the resonator by a preset interval,

wherein a line width of conductive lines of the resonator is smaller than the preset interval.

11. The wireless power receiver of claim 10, wherein the line width of the conductive lines of the resonator is less than or equal to 4.0 mm, and an interval between the conductive lines of the resonator is less than or equal to 4.0 mm.

12. The wireless power receiver of claim 10, further comprising a mechanism having an upper surface on which the resonator is formed,

wherein the mechanism is formed of a dielectric material.

13. The wireless power receiver of claim 10, wherein an air layer is provided between the resonator and the metal layer.

14. The wireless power receiver of claim 10, wherein the metal layer is formed of one of gold, silver, copper, aluminum, iron, titanium, platinum and an alloy of one of gold, silver, copper, aluminum, iron, titanium and platinum.

15. The wireless power receiver of claim 10, wherein the metal layer has electrical conductivity greater than or equal to 2.38×

10⁶ S/m at 20°

C.

16. The wireless power receiver of claim 10, wherein the metal layer has electrical conductivity greater than or equal to 3.5×

10⁷ S/m at 20°

C.

17. The wireless power receiver of claim 10, wherein the preset interval between the resonator and the upper surface of the metal layer is within a range of 0.1 mm to 4.0 mm.

18. The wireless power receiver of claim 10, wherein the line width of each of the conductive lines is within a range of 0.1 mm to 4.0 mm, an interval between the conductive lines is within a range of 0.1 mm to 4.0 mm, and the preset interval between the resonator and the upper surface of the metal layer is within a range of 0.1 mm to 4.0 mm.