WIRELESS POWER TRANSMITTER
A wireless power transmitter includes: a case; a power transmission coil disposed in the case and configured to wirelessly transmit power; and a coupling antenna coil disposed in the case, wherein an outer diameter of the coupling antenna coil is greater than an outer diameter of the power transmission coil.
1 . A wireless power transmitter, comprising:
a case;
a power transmission coil disposed in the case and configured to wirelessly transmit power; and
a coupling antenna coil disposed in the case,
wherein an outer diameter of the coupling antenna coil is greater than an outer diameter of the power transmission coil.
2 . The wireless power transmitter of claim 1 , wherein
the case comprises
an upper case formed of a non-metal material, and
a lower case formed of a metal material, and
the coupling antenna coil is embedded in the upper case.
3 . The wireless power transmitter of claim 2 , wherein
the lower case is electrically connected to a ground, and
the coupling antenna coil is electrically connected to the lower case, and is connected to the ground.
4 . The wireless power transmitter of claim 1 , wherein the coupling antenna coil is disposed on a plane parallel to a plane of the power transmission coil.
5 . The wireless power transmitter of claim 1 , further comprising:
a substrate embedded in the case, wherein the coupling antenna coil is printed on the substrate.
6 . The wireless power transmitter of claim 1 , wherein a center of the coupling antenna coil and a center of the power transmission coil are in a same position or spaced apart within a predetermined range.
7 . The wireless power transmitter of claim 6 , wherein the power transmission coil is disposed inside the outer diameter of the coupling antenna coil.
8 . The wireless power transmitter of claim 1 , further comprising:
a circuit board; and
a magnetic body plate disposed on a top surface of the circuit board,
wherein the power transmission coil is disposed on a top surface of the magnetic body plate.
9 . The wireless power transmitter of claim 8 , wherein the coupling antenna coil is configured to block a part of a magnetic field generated by the power transmission coil to prevent the magnetic field from affecting the circuit board.
10 . The wireless power transmitter of claim 1 , wherein an inner diameter of the coupling antenna coil is less than an inner diameter of the power transmission coil.
11 . A wireless power transmitter, comprising:
a case;
a circuit board disposed in the case;
a power transmission coil formed on a surface of the circuit board and configured to wirelessly transmit power; and
a coupling antenna coil disposed on the circuit board,
wherein an outer diameter of the coupling antenna coil is greater than an outer diameter of the power transmission coil.
12 . The wireless power transmitter of claim 11 , further comprising:
a magnetic body plate disposed on a top surface of the circuit board and included inside the coupling antenna coil,
wherein the power transmission coil is disposed on a top surface of the magnetic body plate.
13 . The wireless power transmitter of claim 11 , wherein the coupling antenna coil is disposed along an outer portion of the circuit board.
14 . The wireless power transmitter of claim 11 , wherein
the case comprises
an upper case formed of a non-metal material, and
a lower case formed of a metal material, and
the coupling antenna coil is embedded in the upper case.
15 . The wireless power transmitter of claim 14 , wherein
the lower case is electrically connected to a ground, and
the coupling antenna coil is electrically connected to the lower case, and is connected to the ground.
16 . The wireless power transmitter of claim 11 , wherein a center of the coupling antenna coil and a center of the power transmission coil are in a same position or spaced apart within a predetermined range.
17 . The wireless power transmitter of claim 11 , wherein the coupling antenna coil is printed on the circuit board.