Wireless Charging Device

• US 20160211696A1
• Filed: 01/21/2016
• Published: 07/21/2016
• Est. Priority Date: 01/21/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: PARK, Sung-Bum, KIM, Do-Won
• Granted Patent: US 10,355,500 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 7/0042 characterised by the mechanical construction

Abstract

A wireless charging device for wirelessly transmitting electric power to an electronic device includes a housing, a system board within the housing and including a power amplifier, a shield-can within the housing with a separation distance between a top of the housing and a top of the shield can, a transmission resonator between the top of the housing and the top of the shield-can for simultaneously generating a vertical magnetic field and a horizontal magnetic field, and a sheet provided between the shield-can and the transmission resonator for shielding the system board and the transmission resonator from each other'"'"'s electromagnetic fields, wherein the electromagnetic fields comprise the vertical magnetic field and the horizontal magnetic field generated by the transmission resonator and an electromagnetic field generated by the system board.

Claims

1. A wireless charging device for wirelessly transmitting electric power to an electronic device, the wireless charging device comprising:

a housing;

a shield-can within the housing, with a separation distance between a top of the housing and a top of the shield-can;

a system board within the housing and comprising a power amplifier;

a transmission resonator between the top of the housing and the top of the shield-can configured to simultaneously generate a vertical magnetic field and a horizontal magnetic field; and

a sheet provided between the shield-can and the transmission resonator configured to shield the system board from a first electromagnetic field from the transmission resonator and the transmission resonator from a second electromagnetic field from the system board, wherein the first electromagnetic field comprises the vertical magnetic field and the horizontal magnetic field generated by the transmission resonator.

2. The wireless charging device of claim 1, wherein the housing is a rectangular or cylindrical housing.

3. The wireless charging device of claim 1, wherein the separation distance comprises a first separation distance, a second separation distance, and a third separation distance, and the first separation distance is between the top of the shield-can and the sheet, the second separation distance is between the sheet and the transmission resonator, and the third separation distance is between the transmission resonator and the top of the housing.

4. The wireless charging device of claim 3, wherein at least one of an intensity and direction of at least one of the vertical magnetic field and the horizontal magnetic field are changed by varying the first separation distance, the second separation distance, and/or the third separation distance.

5. The wireless charging device of claim 1, wherein the electronic device is positioned on the top of the housing to be charged.

6. The wireless charging device of claim 1, wherein the electronic device is positioned near a side surface of the housing to be charged.

7. The wireless charging device of claim 1, wherein a first electronic device is positioned on the top of the housing to be charged, and a second electronic device is positioned near a side surface of the housing to be charged.

8. The wireless charging device of claim 1, wherein the electronic device is a wearable device.

9. The wireless charging device of claim 8, wherein the wearable device is any one of a Head-Mounted Device (HMD), electronic clothes, an electronic bracelet, an electronic necklace, an electronic appcessory, an electronic tattoo, and a smart watch.

10. The wireless charging device of claim 1, wherein the top of the housing is an inclined surface.

11. The wireless charging device of claim 10, wherein the electronic device is positioned on the inclined surface to be charged.

12. The wireless charging device of claim 1, wherein a groove in one of V shape and U shape is formed on the top of the housing.

13. The wireless charging device of claim 12, wherein the electronic device is a wearable device, and the wearable device is positioned in the groove to be charged.

14. The wireless charging device of claim 1, wherein a shield member is provided around an outer circumference of the transmission resonator.

15. The wireless charging device of claim 1, wherein the sheet is a metal sheet.

16. The wireless charging device of claim 1, wherein, when the sheet is removed, the shield-can is configured to shield the system board from the first electromagnetic field from the transmission resonator and the transmission resonator from the second electromagnetic field from the system board.

17. The wireless charging device of claim 1, wherein the transmission resonator comprises a printed circuit board having a coiled or a patterned current path.

18. The wireless charging device of claim 1, wherein the system board comprises a double layer arrangement with one layer of the system board inside the shield-can and a second layer of the system board outside the shield-can.

19. The wireless charging device of claim 1, wherein the power amplifier is a switching power amplifier of Class-E or Class-D type.

20. A wireless charging device for wirelessly transmitting electric power to an electronic device, the wireless charging device comprising:

a housing;

a shield-can within the housing, with a separation distance between a top of the housing and a top of the shield-can;

a system board within the housing and comprising a power amplifier; and

a transmission resonator between the top of the housing and the top of the shield-can configured to simultaneously generate a vertical magnetic field and a horizontal magnetic field.

21. The wireless charging device of claim 20, wherein the housing has a cylindrical shape or a rectangular shape.

22. The wireless charging device of claim 20, wherein the separation distance comprises a first separation distance and a second separation distance, wherein the first separation distance is between the top of the shield-can and the transmission resonator, and the second separation distance is between the top of the housing and the transmission resonator.

23. The wireless charging device of claim 22, wherein at least one of an intensity and direction of at least one of the vertical magnetic field and the horizontal magnetic field are changed by varying the first separation distance and/or the second separation distance.

24. The wireless charging device of claim 20, wherein the shield-can is configured to shield the system board from the vertical magnetic field and the horizontal magnetic field generated by the transmission resonator and shield the transmission resonator from an electromagnetic field generated by the system board.

25. The wireless charging device of claim 20, wherein the electronic device is positioned on the top of the housing to be charged.

26. The wireless charging device of claim 20, wherein the electronic device is positioned near a side surface of the housing to be charged.

27. The wireless charging device of claim 20, wherein a first electronic device is positioned on the top of the housing to be charged, and a second electronic device is positioned near a side surface of the housing to be charged.

28. The wireless charging device of claim 20, wherein the electronic device is a wearable device.

29. The wireless charging device of claim 20, wherein a shield member is provided around an outer circumference of the transmission resonator.

30. The wireless charging device of claim 20, wherein the system board comprises a double layer arrangement with one layer of the system board inside the shield-can and a second layer of the system board outside the shield-can.

31. The wireless charging device of claim 20, wherein the power amplifier is a switching power amplifier of Class-E or Class-D type.