EMI suppression with wireless charging
First Claim
1. A computing device, comprising:
- a charging coil for emitting a charging current when placed in a magnetic field produced by a wireless power transmitter, a wireless charging operating frequency being associated with wireless charging of a battery of the computing device by the charging coil and the wireless power transmitter;
an electrically conductive substrate having a plurality of gaps for reducing eddy currents when the electrically conductive substrate is disposed between the charging coil and the wireless power transmitter during charging of the battery; and
a plurality of filters each electrically bridging a respective one of the gaps, each filter attenuating signals within a range of frequencies including the wireless charging operating frequency.
1 Assignment
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Accused Products
Abstract
A computing device includes a charging coil for producing a charging current when placed in a magnetic field of a wireless power transmitter. A wireless charging operating frequency is associated with wireless charging of a battery of the computing device by the charging coil and the wireless power transmitter. An electrically conductive substrate has a plurality of gaps for reducing eddy currents when the electrically conductive substrate is disposed between the charging coil and the wireless power transmitter during charging of the battery. A plurality of filters each electrically bridge a respective one of the gaps. Each filter attenuates signals within a range of frequencies including the wireless charging operating frequency.
14 Citations
25 Claims
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1. A computing device, comprising:
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a charging coil for emitting a charging current when placed in a magnetic field produced by a wireless power transmitter, a wireless charging operating frequency being associated with wireless charging of a battery of the computing device by the charging coil and the wireless power transmitter; an electrically conductive substrate having a plurality of gaps for reducing eddy currents when the electrically conductive substrate is disposed between the charging coil and the wireless power transmitter during charging of the battery; and a plurality of filters each electrically bridging a respective one of the gaps, each filter attenuating signals within a range of frequencies including the wireless charging operating frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A computing device, comprising:
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a charging coil for emitting a charging current when placed in a magnetic field produced by a wireless power transmitter, a wireless charging operating frequency being associated with wireless charging of a battery of the computing device by the charging coil and the wireless power transmitter; an electrically conductive substrate having a plurality of slits for reducing eddy currents when the electrically conductive substrate is disposed between the charging coil and the wireless power transmitter during charging of the battery; and a plurality of filters each electrically coupled to the substrate, each filter having substantially no electrical effect on an impedance of a respective one of the slits at frequencies within a range of the wireless charging operating frequency, and electrically shorting across the respective one of the slits at frequencies outside the range of the wireless charging operating frequency. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of manufacturing a computing device, the method comprising:
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providing an electrically conductive substrate with a plurality of gaps; coupling a plurality of filters to the electrically conductive substrate such that each filter electrically bridges a respective one of the gaps; and disposing a charging coil adjacent to the substrate within a frame of the computing device. - View Dependent Claims (22, 23, 24, 25)
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Specification