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 wireless power receiving coil on the first layer;
a second layer on the wireless power receiving coil;
a first region in which at least one of the first layer and the second layer overlaps the wireless power receiving coil in a vertical direction perpendicular to an upper surface of the shielding unit; and
a second region in which at least one of the first layer and the second layer does not overlap the 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.
2. The wireless power receiver of claim 1 , wherein the second distance is smaller than a thickness, measured in the vertical direction, of the wireless power receiving coil.
3. 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.
4. The wireless power receiver of claim 3 , 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.
5. The wireless power receiver of claim 1 , wherein a portion of the first layer is disposed on a side surface of the wireless power receiving coil.
6. The wireless power receiver of claim 5 , wherein a portion of the second layer is disposed on the side surface of the wireless power receiving coil.
7. The wireless power receiver of claim 1 , comprising: a short range communication antenna on the first layer.
8. The wireless power receiver of claim 7 , comprising:
a third region in which at least one of the first layer and the second layer overlaps the short range communication antenna in the vertical direction; and
a fourth region in which at least one of the first layer and the second layer does not overlap the short range communication antenna in the vertical direction,
wherein a third distance, measured in the vertical direction, between the first layer and the second layer in the third region is greater than a fourth distance, measured in the vertical direction, between the first layer and the second layer in the fourth region.
9. The wireless power receiver of claim 8 , wherein the fourth distance is smaller than a thickness, measured in the vertical direction, of the short range communication antenna.
10. The wireless power receiver of claim 9 , wherein a thickness, measured in the vertical direction, of the first layer in the third region is smaller than a thickness, measured in the vertical direction, of the first layer in the fourth region.
11. The wireless power receiver of claim 8 , wherein a thickness, measured in the vertical direction, of the second layer in the third region is smaller than a thickness, measured in the vertical direction, of the second layer in the fourth region.
12. The wireless power receiver of claim 11 , wherein a portion of the first layer is disposed on a side surface of the short range communication antenna.
13. The wireless power receiver of claim 8 , wherein a portion of the second layer is disposed on the side surface of the short range communication antenna.
14. The wireless power receiver of claim 1 , comprising: an adhesive between the shielding unit and the first layer.
15. The wireless power receiver of claim 1 , wherein the shielding unit has a reception space in a predetermined area.
16. The wireless power receiver of claim 1 , wherein the second region is positioned at an outer side of the wireless power receiving coil.
17. 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 the second layer overlaps the first wireless power receiving coil and the second wireless power receiving coil in a vertical direction perpendicular to an upper surface of the shielding unit; and
a second region in which the second layer does not vertically overlap the first wireless power receiving coil or the second wireless power receiving coil in the vertical direction;
wherein at least one of the following two conditions is met:
i) 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; and
ii) a third distance, measured in the vertical direction, between the second layer and the third layer in the first region is greater than a fourth distance, measured in the vertical direction, between the second layer and the third layer in the second region.
18. The wireless power receiver of claim 17 , wherein the second region is positioned at an outer side of the first wireless power receiving coil, at an outer side of the second wireless power receiving coil, or both.
19. A wireless power receiver, comprising:
a shielding unit;
a first layer on the shielding unit;
a wireless power receiving coil on the first layer;
a second layer on the wireless power receiving coil;
a first region in which at least one of the first layer and the second layer overlaps the wireless power receiving coil in a vertical direction perpendicular to an upper surface of the shielding unit; and
a second region in which at least one of the first layer and the second layer does not overlap the wireless power receiving coil in the vertical direction,
wherein a first gap between the first layer and the second layer in the first region is larger than a second gap between the first layer and the second layer in the second region.
20. The wireless power receiver of claim 19 , wherein the second gap is smaller than a thickness, measured in the vertical direction, of the wireless power receiving coil.