Wireless power receiver and control method thereof
A wireless power receiver according to an embodiment wirelessly receives power from a wireless power transmitter. The wireless power receiver includes a printed circuit board having a reception space in a predetermined area, a receiving coil disposed in the reception space of the printed circuit board for receiving power from the wireless power transmitter, and a short-range communication antenna disposed on the printed circuit board while surrounding the receiving coil.
1. A wireless power receiver, comprising:
a shielding unit;
a first layer on the shielding unit;
a first wireless power receiving coil on the first layer;
a second layer on the first wireless power receiving coil;
a second wireless power receiving coil on the second layer;
a third layer on the second wireless power receiving coil;
a first region in which at least one of the first layer and the second layer overlaps the first wireless power receiving coil in a vertical direction perpendicular to an upper surface of the shielding unit;
a second region in which at least one of the first layer and the second layer does not overlap the first wireless power receiving coil in the vertical direction;
a third region in which at least one of the second layer and the third layer overlaps the second wireless power receiving coil in the vertical direction; and
a fourth region in which at least one of the second layer and the third layer does not overlap the second wireless power receiving coil in the vertical direction;
wherein a first distance, measured in the vertical direction, between the first layer and the second layer in the first region is greater than a second distance, measured in the vertical direction, between the first layer and the second layer in the second region,
wherein a third distance, measured in the vertical direction, between the second layer and the third layer in the third region is greater than a fourth distance, measured in the vertical direction, between the second layer and the third layer in the fourth region, and
wherein the second wireless power receiving coil is spaced farther away from the shielding unit, in the vertical direction, than is the first wireless power receiving coil.
2. The wireless power receiver of claim 1 , wherein the first distance is identical to the third distance.
3. The wireless power receiver of claim 1 , wherein a thickness of the first layer is the same as that of the second layer and that of the third layer.
4. The wireless power receiver of claim 1 , wherein a thickness of the first wireless power receiving coil is the same as that of the second wireless power receiving coil.
5. The wireless power receiver of claim 1 , wherein each of the second region and the fourth region has a space.
6. The wireless power receiver of claim 1 , wherein the second distance is smaller than a thickness, measured in the vertical direction, of the first wireless power receiving coil.
7. The wireless power receiver of claim 1 , wherein the fourth distance is smaller than a thickness, measured in the vertical direction, of the second wireless power receiving coil.
8. The wireless power receiver of claim 1 , wherein a thickness, measured in the vertical direction, of the first layer in the first region is smaller than a thickness, measured in the vertical direction, of the first layer in the second region.
9. The wireless power receiver of claim 8 , wherein a thickness, measured in the vertical direction, of the second layer in the first region is smaller than a thickness, measured in the vertical direction, of the second layer in the second region.
10. The wireless power receiver of claim 9 , wherein a thickness, measured in the vertical direction, of the third layer in the third region is smaller than a thickness, measured in the vertical direction, of the third layer in the fourth region.
11. The wireless power receiver of claim 1 , wherein a thickness, measured in the vertical direction, of the second layer in the first region is smaller than a thickness, measured in the vertical direction, of the second layer in the second region.
12. The wireless power receiver of claim 1 , wherein a thickness, measured in the vertical direction, of the third layer in the third region is smaller than a thickness, measured in the vertical direction, of the third layer in the fourth region.
13. The wireless power receiver of claim 1 , wherein a portion of the first layer is disposed on a side surface of the first wireless power receiving coil.
14. The wireless power receiver of claim 1 , wherein a portion of the second layer is disposed on a side surface of the first wireless power receiving coil.
15. The wireless power receiver of claim 1 , wherein a portion of the second layer is disposed on a side surface of the second wireless power receiving coil.
16. The wireless power receiver of claim 1 , wherein a portion of the third layer is disposed on a side surface of the second wireless power receiving coil.
17. The wireless power receiver of claim 1 , comprising:
a first short range communication antenna on the first layer; and
a second short range communication antenna of the second layer.
18. The wireless power receiver of claim 1 , comprising an adhesive between the shielding unit and the first layer.
19. The wireless power receiver of claim 1 , wherein the shielding unit has a reception space in a predetermined area.
20. The wireless power receiver of claim 1 , wherein the second region is positioned at an outer side of the first wireless power receiving coil, and
wherein the fourth region is positioned at an outer side of the second wireless power receiving coil.