Power feeding device, power feeding method, and power feeding system
First Claim
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1. A power feeding device, comprising:
- a plurality of electrodes within an antenna pattern layer;
a power supply configured to apply a voltage between a first of the plurality of electrodes and a second of the plurality of electrodes;
a detector configured to measure the voltage, the measurement detecting an amount of change in a parameter based on the voltage applied between the first electrode and the second electrode, wherein the amount of change in the parameter is compared with a threshold value;
a coil within the antenna pattern layer, an electromagnetic wave being emissible from the coil;
a control circuit configured to adjust an amount of electric power based on whether the amount of change in the parameter is equal to or greater than the threshold value, the coil is configured to transform the electric power into the electromagnetic wave; and
a magnetic layer between a substrate and the antenna pattern layer, the magnetic layer is in contact with the substrate and the antenna pattern layer at opposite surfaces of the magnetic layer respectively;
wherein the plurality of electrodes extend into the magnetic layer,wherein a portion of the antenna pattern layer is between the first of the plurality of electrodes and the second of the plurality of electrodes, a portion of the magnetic layer being between the first of the plurality of electrodes and the second of the plurality of electrodes.
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Abstract
Disclosed herein is a power feeding device including: power transmitting section which transmits electric power by way of a magnetic field; a set of first and second electrodes which are spaced from each other; a power supply which applies a voltage between the first and second electrodes; and a detector which detects whether foreign matter is present on the power transmitting section or not based on the voltage applied by the power supply.
27 Citations
25 Claims
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1. A power feeding device, comprising:
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a plurality of electrodes within an antenna pattern layer; a power supply configured to apply a voltage between a first of the plurality of electrodes and a second of the plurality of electrodes; a detector configured to measure the voltage, the measurement detecting an amount of change in a parameter based on the voltage applied between the first electrode and the second electrode, wherein the amount of change in the parameter is compared with a threshold value; a coil within the antenna pattern layer, an electromagnetic wave being emissible from the coil; a control circuit configured to adjust an amount of electric power based on whether the amount of change in the parameter is equal to or greater than the threshold value, the coil is configured to transform the electric power into the electromagnetic wave; and a magnetic layer between a substrate and the antenna pattern layer, the magnetic layer is in contact with the substrate and the antenna pattern layer at opposite surfaces of the magnetic layer respectively; wherein the plurality of electrodes extend into the magnetic layer, wherein a portion of the antenna pattern layer is between the first of the plurality of electrodes and the second of the plurality of electrodes, a portion of the magnetic layer being between the first of the plurality of electrodes and the second of the plurality of electrodes.
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2. A power feeding device, comprising:
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a magnetic layer between a substrate and an antenna pattern layer in a cross-sectional view of the power feeding device; an electrode in the magnetic layer, the electrode extends into the antenna pattern layer; and a coil in the antenna pattern layer, the coil surrounds the electrode in a plan view of the power feeding device, wherein a portion of the antenna pattern layer, that is disposed between the electrode and a portion of the coil, is a resin layer. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification