Patent ID: 9634731
Date: 2017-04-25
CPC Classifications: H04B

Claim:
1. A wireless power transmitter for transmitting power to a wireless power receiver, the wireless power transmitter comprising: a first substrate; a support member disposed on an upper surface of the first substrate; a receiving unit having a cylindrical structure and vertically connected with the upper surface of the first substrate through the support member; a second substrate disposed on a shielding unit, wherein the shielding unit is disposed on an upper surface of an inner side of the second substrate and a side surface of the inner side of the second substrate; a transmission circuit unit converting power supplied by a power supply unit into power having a frequency of resonance and disposed on the second substrate; a transmission induction coil coupling the converted power and disposed on the upper surface of the first substrate; a transmission resonance coil disposed adjacent to the transmission induction coil to transfer the coupled power from the transmission induction coil to the wireless power receiver; and a power connecting unit receiving the power supplied by the power supply unit and transferring the power to the transmission circuit unit; wherein the shielding unit protects the transmission circuit unit by changing a direction of magnetic field formed in the transmission resonance coil, wherein the power connecting unit is disposed on the first substrate, wherein the power connecting unit is disposed inside the transmission resonance coil, wherein the transmission circuit unit is vertically spaced apart from the transmission resonance coil, wherein the transmission induction coil and the transmission resonance coil are disposed between the first substrate and the second substrate, wherein a ratio of a diameter of the second substrate to a diameter of the transmission resonance coil is 3:8, and wherein a vertical distance between the transmission circuit unit and the transmission resonance coil is in a range of 10 mm to 20 mm.