Wireless charging apparatus and method
First Claim
Patent Images
1. An electronic device comprising:
- a battery;
a communication circuit;
a power receiving circuit for generating a current based on an electromagnetic field provided from a wireless power transmitting device; and
controlling circuitry configured to at least;
control to charge the battery using a first current generated at the power receiving circuit based on an electromagnetic field with a first strength provided from the wireless power transmitting device,based on a full charge condition for the battery being satisfied, control to transmit, through the communication circuit, first information towards the wireless power transmitting device, the first information comprising a charging status of the battery of the electronic device, andafter the first information is transmitted, control to charge the battery using a second current generated at the power receiving circuit based on the electromagnetic field with the second strength provided from the wireless power transmitting device, 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
21 Claims
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1. An electronic device comprising:
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a battery; a communication circuit; a power receiving circuit for generating a current based on an electromagnetic field provided from a wireless power transmitting device; and controlling circuitry configured to at least; control to charge the battery using a first current generated at the power receiving circuit based on an electromagnetic field with a first strength provided from the wireless power transmitting device, based on a full charge condition for the battery being satisfied, control to transmit, through the communication circuit, first information towards the wireless power transmitting device, the first information comprising a charging status of the battery of the electronic device, and after the first information is transmitted, control to charge the battery using a second current generated at the power receiving circuit based on the electromagnetic field with the second strength provided from the wireless power transmitting device, 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 at a power receiving circuit of the electronic device based on an electromagnetic field with a first strength provided from a wireless power transmitting device; based on a full charge condition for the battery being satisfied, transmitting, through a communication circuit of the electronic device, first information towards the wireless power transmitting device, the first information comprising a charging status of the battery of the electronic device; and after the first information is transmitted, charging the battery using a second current generated at the power receiving circuit based on an electromagnetic field with a second strength provided from the wireless power transmitting device, to maintain the full charge condition for the battery. - View Dependent Claims (10, 11, 12, 13)
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14. A mobile terminal comprising:
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a coil; a battery; a display; a communication unit; a power receiver configured to; receive first power from a wireless power transmitter through the coil to provide the received first power to a power management integrated circuit (PMIC), and receive second power from the wireless power transmitter through the coil to provide the received second power to the PMIC while the battery is in a fully charged state, wherein the second power is lower than the first power and the second power is continuously transmitted from the wireless power transmitter without being interrupted; wherein the PMIC is configured to; perform charging of the battery based on the provided first power, and while the battery is in the fully charged state, perform an auxiliary charging of the battery based on the provided second power having a predetermined voltage, the predetermined voltage being controlled to be maintained to a fixed value during the fully charged state, wherein the auxiliary charging is performed to supplement power that is self-discharged, and a controller configured to at least; control the communication unit to send a message to the wireless power transmitter, and upon receiving a full charge message from the PMIC, control to display a full charge status on the display while the battery is in the fully charged state. - View Dependent Claims (15, 16, 17)
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18. A method for operating a mobile terminal comprising a coil;
- a battery;
a display;
a communication unit;
a power receiver for receiving transmission power from a wireless power transmitter through the coil;
a power integrated management circuit (PMIC) configured to charge the battery with the received transmission power; and
a controller, the method including;by the PMIC, while the power receiver receives first power from a wireless power transmitter through the coil to provide the received first power to the PMIC, performing, by the PMIC, a charge of the battery based on the provided first power, and while the battery is in a fully charged state; while power receiver receives second power from the wireless power transmitter through the coil to provide the received second power to the PMIC, performing an auxiliary charge of the battery based on the provided second power having a predetermined voltage, the predetermined voltage being controlled to be maintained to a fixed value during the fully charged state, wherein the auxiliary charging is performed to supplement power that is self-discharged, wherein the second power is lower than the first power and the second power is continuously transmitted from the wireless power transmitter without being interrupted; and by the controller, controlling the communication unit to send a message to the wireless power transmitter, and upon receiving a full charge message from the PMIC, controlling to display a full charge status on the display while the battery is in the fully charged state. - View Dependent Claims (19, 20, 21)
- a battery;
Specification