Wireless charging apparatus and method
AssigneeSamsung Electronics Co., Ltd.
InventorsSung-Bum Park, Se-Ho Park, Young-Min Lee
Life of this patent
Estimating the term…
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.
Claims14
A wireless power receiver comprising:
- a power receiver for receiving transmission power from a wireless power transmitter;
- a communication unit for transmitting a Charge Status (CS) packet to the wireless power transmitter when a battery of the wireless power receiver is fully charged from the received transmission power, wherein the CS packet comprises a full charge status indicator;
- a Power Management Integrated Circuit (PMIC) for charging the battery with the received transmission power, and, when the battery is fully charged, providing a full charge message and performing an auxiliary charge of the battery with strength-reduced transmission power;
- and
- a controller for controlling the communication unit to transmit the CS packet upon receiving the full charge message from the PMIC.
A wireless charging method of a wireless power receiver comprising the steps of:
- receiving transmission power transmitted from a wireless power transmitter at a power receiver of the wireless power receiver;
- charging a battery of the wireless power receiver with the received transmission power;
- determining whether the battery is fully charged;
- transmitting a Charge Status (CS) packet from a communication unit of the wireless power receiver to the wireless power transmitter when the battery is fully charged;
- and
- performing an auxiliary charge of the battery by receiving strength-reduced transmission power from the wireless power transmitter.
A wireless power transmitter comprising:
- a power converter for converting supplied power into wireless power and transmitting the wireless power;
- a communication unit for receiving a Charge Status (CS) packet from a wireless power receiver, wherein the CS packet comprises a full charge status indicator for a battery of the wireless power receiver;
- a controller for reducing a strength of the wireless power transmitted from the power converter to a predetermined strength when the CS packet is received from the wireless power receiver;
- and
- a display for displaying a fully charged status of the wireless power receiver.
A wireless charging method of a wireless power transmitter, comprising the steps of:
- converting supplied power into wireless power at a power converter of the wireless power transmitter;
- transmitting the wireless power from the power converter to a wireless power receiver;
- receiving a Charge Status (CS) packet from the wireless power receiver at a communication unit of the wireless power transmitter, wherein the CS packet comprises a full charge status indicator for a batter of the wireless power receiver;
- reducing a strength of the wireless power transmitted from the power converter to a predetermined strength when the CS packet is received from the wireless power receiver;
- and
- displaying a fully charged status of the wireless power receiver on a display of the wireless power transmitter.
Dependencies are inferred from the claim text.