| 主权项 |
1. A wireless power transmitter comprising:
a transmitting coil configured to wirelessly transmit power to a receiving coil; anda shield residing on a given side of a substrate spaced apart from the transmitting coil, the shield being configured to filter an electric field induced by the transmitting coil, wherein the shield includes a trace forming a planar pattern of a conductive material that extends across a perimeter of a footprint of the transmitting coil, wherein the trace has a first end coupled to a base region of the shield and extends from the base region to terminate in a second end that is distal from the base region of the shield, wherein the trace of the shield comprises a plurality of spaced apart traces, wherein each trace has a first end coupled to the base region of the shield and extends from the base region to terminate in a second end thereof that is distal the base region of the shield, wherein the shield is a first shield and the wireless power transmitter further comprises:
a second shield disposed on another side of the substrate, wherein the another side of the substrate opposes the given side of the substrate, the second shield having a plurality of traces of conductive material, wherein each trace of the second shield extends from a base region of the second shield in a pattern that interleaves with corresponding traces of the first shield; a third shield having the transmitting coil disposed thereon, the third shield comprising a disc of ferrite; and a fourth shield having the third shield disposed thereon, the fourth shield comprising a plate, screen or film of a conductive material. |
