MAGNETIC SHIELD FOR USE IN A LOCATION SENSING SYSTEM
First Claim
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1. An apparatus, comprising:
- a location sensing surface;
a drive coil arranged in relation to a periphery of the location sensing surface; and
a magnetic shield plate disposed below the location sensing surface and the drive coil, the shield plate comprising a plurality of radially oriented slots originating at, and distributed about, a periphery of the shield plate.
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Abstract
An energy transfer apparatus with a magnetic shield is configured to magnetically couple energy from a fixed location to a mobile or moveable device within a field-activated space of the energy transfer apparatus. Apparatuses include a location sensing surface and a drive coil arranged in relation to a periphery of the location sensing surface. A magnetic shield plate is disposed below the location sensing surface and the drive coil. The shield plate includes a number of radially oriented slots originating at, and distributed about, a periphery of the shield plate.
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Citations
25 Claims
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1. An apparatus, comprising:
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a location sensing surface; a drive coil arranged in relation to a periphery of the location sensing surface; and a magnetic shield plate disposed below the location sensing surface and the drive coil, the shield plate comprising a plurality of radially oriented slots originating at, and distributed about, a periphery of the shield plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus, comprising:
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a location sensing surface; a drive coil disposed relative to a periphery of the location sensing surface; and a magnetic shield plate disposed below the location sensing surface and the drive coil, the shield plate formed to provide a relatively low reluctance and electrical resistance in a first direction, and a relatively high reluctance and electrical resistance in a second direction, the second direction differing from the first direction. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification