FEED UNIT, FEED SYSTEM, AND ELECTRONIC DEVICE
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Accused Products
Abstract
A feed unit includes: a power transmission section configured to perform power transmission using a magnetic field or an electric field, to a device to be fed including a secondary battery; and a power-transmission control section configured to control power transmission operation in the power transmission section. In a charging period in which charging to the secondary battery is performed based on transmitted power in the power transmission, when the device to be fed including the secondary battery is activated, the power-transmission control section controls the power transmission operation, to increase the transmitted power.
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Citations
21 Claims
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1. (canceled)
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2. An electronic device, comprising:
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a power receiving coil configured to receive power that is wirelessly supplied from a feed device; a voltage converting circuit configured to generate a predetermined voltage based on the power; a battery configured to receive the power from the voltage converting circuit, and a control circuit configured to control charging of the battery; and transmit a request to the feed device, wherein when the electronic device is in an activated state, the request transmitted by the control circuit indicates to increase the power to keep the predetermined voltage, the feed device determines whether to increase or decrease the power wirelessly supplied to the power receiving coil based on the request transmitted by the control circuit, and when the electronic device is in a non-activated state, the power receiving coil is configured to; receive a first power level when the battery stores a first charge, receive a second power level that is less than the first power level when the battery stores a second charge that is greater than the first charge, and receive a third power level that is less than the second power level when charging of the battery is complete. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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9. An electronic device, comprising:
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processing circuitry configured to control charging of a battery with power that is wirelessly supplied from a feed device and wirelessly received by a coil; determine whether the electronic device is in an activated state or in a non-activated state; and transmit a request to the feed device, wherein when the electronic device is in an activated state, the request transmitted by the processing circuitry indicates to increase the power supplied from the feed device to keep the predetermined voltage, the feed device determines whether to increase or decrease the power wirelessly supplied to the coil based on the request transmitted by the processing circuitry, and when the electronic device is in a non-activated state, the processing circuitry is configured to control the charging of the battery to; a first level of power received by the coil when the battery stores a first charge, a second level of power received by the coil when the battery stores a second charge, and a third level of power received by the coil when the charging of the battery is complete, the first charge is less than the second charge, the second charge is less than a predetermined threshold, the second level of power is less than the first level of power, and the third level of power is less than the second level of power. - View Dependent Claims (10, 11, 12, 13, 14)
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15. An electronic device, comprising:
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a power receiving coil configured to receive power that is wirelessly supplied from a feed device; a battery configured to be charged by the power received by the power receiving coil; and a control circuit configured to control charging of the battery; and transmit a request to the feed device, wherein when the electronic device is in an activated state, the request transmitted by the control circuit indicates to increase the power supplied from the feed device to keep the predetermined voltage, the feed device determines whether to increase or decrease the power wirelessly supplied to the power receiving coil based on the request transmitted by the processing circuitry, and when the load indicates that the electronic device is in the non-activated state battery stores a charge greater than a predetermined threshold and the charging of the battery is not complete, the power receiving coil receives power that is reduced until the charging of the battery is complete. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification