Wireless charging systems and methods
First Claim
1. A wrist-worn charge-receiving device, comprising:
- an antenna coil adapted to receive radio frequency (RF) charging energy, the antenna coil comprising non-uniform windings, wherein the non-uniform windings comprise a first area and a second, different area, wherein a spacing of the windings in the first area is narrower than a spacing of the windings in the second area, wherein the first area is located in a plane that is different than a plane in which the second area is located, wherein the non-uniform windings are spaced so as to create tilts in a plurality of charging planes with respect to the planes formed by the major axes of a Cartesian coordinate system, and wherein the planes formed by the major axes of the Cartesian coordinate system comprise an x-y plane, an x-z plane, and a y-z plane; and
a rechargeable power source coupled to the antenna coil, the antenna coil adapted to provide the RF charging energy to the rechargeable power source.
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Accused Products
Abstract
An embodiment of a system for wirelessly charging a wrist-worn device may include a radio frequency (RF) charging energy generating element, and an antenna configured to radiate the RF charging energy, the antenna comprising a first coil and a second coil, the first coil and the second coil each comprising a plurality of windings, the windings of the first coil being wound in a direction opposite the direction of the windings of the second coil. An embodiment of a wrist-worn charge-receiving device may include an antenna coil adapted to receive radio frequency (RF) charging energy, the antenna coil comprising non-uniform windings; and a rechargeable power source coupled to the antenna coil, the antenna coil adapted to provide the RF charging energy to the rechargeable power source.
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Citations
24 Claims
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1. A wrist-worn charge-receiving device, comprising:
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an antenna coil adapted to receive radio frequency (RF) charging energy, the antenna coil comprising non-uniform windings, wherein the non-uniform windings comprise a first area and a second, different area, wherein a spacing of the windings in the first area is narrower than a spacing of the windings in the second area, wherein the first area is located in a plane that is different than a plane in which the second area is located, wherein the non-uniform windings are spaced so as to create tilts in a plurality of charging planes with respect to the planes formed by the major axes of a Cartesian coordinate system, and wherein the planes formed by the major axes of the Cartesian coordinate system comprise an x-y plane, an x-z plane, and a y-z plane; and a rechargeable power source coupled to the antenna coil, the antenna coil adapted to provide the RF charging energy to the rechargeable power source. - View Dependent Claims (2, 3, 4, 5)
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6. A system for wirelessly charging a wrist-worn device, comprising:
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a radio frequency (RF) charging energy generating element; a transmit antenna configured to radiate the RF charging energy, the transmit antenna comprising a first coil and a second coil, the first coil and the second coil each comprising a plurality of windings, the windings of the first coil being wound in a direction opposite the direction of the windings of the second coil, and wherein the second coil is located within a periphery of the first coil and the first and second coils are configured to produce a magnetic field that is focused in an area between the first coil and the second coil; and a charge receiving device located between the first coil and the second coil, the charge receiving device comprising a receive antenna coil and a rechargeable power source coupled to the receive antenna coil, the receive antenna coil comprising non-uniform windings adapted to receive the RF charging energy and provide the RF charging energy to the rechargeable power source, wherein the non-uniform windings comprise a first area and a second, different area, wherein a spacing of the windings in the first area is narrower than a spacing of the windings in the second area, wherein the first area is located in a plane that is different than a plane in which the second area is located, wherein the non-uniform windings are spaced so as to create tilts in a plurality of charging planes with respect to the planes formed by the major axes of a Cartesian coordinate system, and wherein the planes formed by the major axes of the Cartesian coordinate system comprise an x-y plane, an x-z plane, and a y-z plane. - View Dependent Claims (7, 8, 9, 10)
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11. A wireless charging system, comprising:
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a wireless rechargeable device configured to rest on at least two of its surfaces, the wireless rechargeable device comprising a first inductive receiver coil positioned on or near a first of the at least two surfaces, and a second inductive receiver coil positioned on or near a second of the at least two surfaces; and a wireless charger comprising one or more inductive transmit coils configured to wirelessly transmit power to the wireless rechargeable device, wherein to wirelessly transmit power, the wireless charger is configured to generate an alternating magnetic field, in the one or more inductive transmit coils, that induces an alternating current in at least one of the first inductive receiver coil or the second inductive receiver coil when the one or more inductive transmit coils are aligned with at least one of the first inductive receiver coil or the second inductive receiver coil. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification