Wireless charging apparatus and method
First Claim
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1. An electronic device comprising:
- a display;
a battery;
a power receiver for generating a current based on an electromagnetic field provided from a wireless power transmitter; and
controlling circuitry configured to at least;
control to charge the battery using a first current generated by the power receiver based on an electromagnetic field with a first strength provided from the wireless power transmitter,based on determining that a full charge condition for the battery is satisfied, control to transmit first information towards the wireless power transmitter for causing the wireless power transmitter to provide an electromagnetic field with a second strength which is smaller than the first strength, andcontrol to charge the battery, after the first information is transmitted, using a second current generated by the power receiver based on the electromagnetic field with the second strength provided from the wireless power transmitter, to maintain the full charge condition for the battery.
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Abstract
Methods and apparatus for wireless charging are provided. Transmission power transmitted from a wireless power transmitter is received at a power receiver of a wireless power receiver. A battery of the wireless power receiver is charged with the received transmission power. It is determined whether the battery is fully charged. A packet from a communication unit of the wireless power receiver is transmitted to the wireless power transmitter when the battery is fully charged. An auxiliary charge of the battery is performed by receiving strength-reduced transmission power from the wireless power transmitter.
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Citations
18 Claims
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1. An electronic device comprising:
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a display; a battery; a power receiver for generating a current based on an electromagnetic field provided from a wireless power transmitter; and controlling circuitry configured to at least; control to charge the battery using a first current generated by the power receiver based on an electromagnetic field with a first strength provided from the wireless power transmitter, based on determining that a full charge condition for the battery is satisfied, control to transmit first information towards the wireless power transmitter for causing the wireless power transmitter to provide an electromagnetic field with a second strength which is smaller than the first strength, and control to charge the battery, after the first information is transmitted, using a second current generated by the power receiver based on the electromagnetic field with the second strength provided from the wireless power transmitter, to maintain the full charge condition for the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of charging a battery for an electronic device, comprising:
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charging the battery using a first current generated by a power receiver of the electronic device based on an electromagnetic field with a first strength provided from a wireless power transmitter; based on determining that a full charge condition for the battery is satisfied, transmitting first information towards the wireless power transmitter for causing the wireless power transmitter to provide an electromagnetic field with a second strength which is smaller than the first strength; and charging the battery, after the first information is transmitted, using a second current generated by the power receiver based on the electromagnetic field with the second strength provided from the wireless power transmitter, to maintain the full charge condition for the battery. - View Dependent Claims (10, 11, 12, 13)
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14. A method of charging a battery for an electronic device, comprising:
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controlling to charge the battery using a first current generated by a power receiver of the electronic device based on an electromagnetic field with a first strength provided from a wireless power transmitter; based on determining that a full charge condition for the battery is satisfied, controlling to transmit first information towards the wireless power transmitter for causing the wireless power transmitter to provide an electromagnetic field with a second strength which is smaller than the first strength; and controlling to charge the battery, after the first information is transmitted, using a second current generated by the power receiver based on the electromagnetic field with the second strength provided from the wireless power transmitter, to maintain the full charge condition for the battery. - View Dependent Claims (15, 16, 17, 18)
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Specification