Apparatus and method for transmitting wireless power
First Claim
1. A method for wirelessly transmitting power by a wireless power transmitter, the method comprising:
- outputting detection power through a resonator of the wireless power transmitter;
detecting a change in impedance of the wireless power transmitter caused by a placement of a wireless power receiver;
in response to detecting the change, outputting, through the resonator of the wireless power transmitter, driving power for communicating with the wireless power receiver;
receiving a search signal from the wireless power receiver, wherein the search signal is, based on the driving power, generated by the wireless power receiver;
based on the search signal from the wireless power receiver, transmitting, to the wireless power receiver, a first response signal corresponding to the search signal to establish a communication connection with the wireless power receiver;
receiving, from the wireless power receiver over the communication connection established based on the first response signal, a join signal including both a maximum voltage value for the wireless power receiver and a minimum voltage value for the wireless power receiver;
based on the join signal, transmitting, over the communication connection to the wireless power receiver, a second response signal including permission information; and
outputting, through the resonator, charging power to charge the wireless power receiver.
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Accused Products
Abstract
A method and apparatus are provided for determining, by a wireless power transmitter, whether a wireless power receiver is removed from a wireless power network managed by the wireless power transmitter. The method includes transmitting a command signal to report power information of the wireless power receiver at stated periods; determining whether a report signal corresponding to the command signal is received from the wireless power receiver; and determining that the wireless power receiver is removed from the wireless power network, if the report signal is not received after transmitting the command signal a predetermined number of times at the stated periods.
73 Citations
22 Claims
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1. A method for wirelessly transmitting power by a wireless power transmitter, the method comprising:
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outputting detection power through a resonator of the wireless power transmitter; detecting a change in impedance of the wireless power transmitter caused by a placement of a wireless power receiver; in response to detecting the change, outputting, through the resonator of the wireless power transmitter, driving power for communicating with the wireless power receiver; receiving a search signal from the wireless power receiver, wherein the search signal is, based on the driving power, generated by the wireless power receiver; based on the search signal from the wireless power receiver, transmitting, to the wireless power receiver, a first response signal corresponding to the search signal to establish a communication connection with the wireless power receiver; receiving, from the wireless power receiver over the communication connection established based on the first response signal, a join signal including both a maximum voltage value for the wireless power receiver and a minimum voltage value for the wireless power receiver; based on the join signal, transmitting, over the communication connection to the wireless power receiver, a second response signal including permission information; and outputting, through the resonator, charging power to charge the wireless power receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A wireless power transmitter comprising:
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a resonator; a communication unit; and a controller configured to; output detection power through the resonator, detect a change in impedance of the wireless power transmitter caused by a placement of a wireless power receiver, in response to detecting the change, output, through the resonator, driving power for communicating with the wireless power receiver, receive a search signal from the wireless power receiver, wherein the search signal is, based on the driving power, generated by the wireless power receiver by using the communication unit, based on the search signal from the wireless power receiver, transmit, to the wireless power receiver, a first response signal corresponding to the search signal to establish a communication connection with the wireless power receiver by using the communication unit, receive, from the wireless power receiver over the communication connection established based on the first response signal, a join signal including both a maximum voltage value for the wireless power receiver and a minimum voltage value for the wireless power receiver by using the communication unit, based on the join signal, transmit, over the communication connection to the wireless power receiver, a second response signal including permission information by using the communication unit, and output, through the resonator, charging power to charge the wireless power receiver. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification