POWER TRANSMITTING METHOD AND POWER TRANSMITTER FOR COMMUNICATION WITH POWER RECEIVER
First Claim
1. A method of controlling power transmission of a wireless power transmitter, the method comprising:
- transmitting, by a resonator, first power for detecting a change of impedance;
in response to the change of impedance being detected, transmitting, by the resonator, second power for communicating with a wireless power receiver;
increasing the second power from a first magnitude to a second magnitude, wherein the second magnitude is greater than the first magnitude;
receiving, by a wireless communication unit, a search signal from the wireless power receiver while transmitting the second power;
in response to receiving the search signal, transmitting, by the wireless communication unit, a connection request signal to the wireless power receiver; and
transmitting, by the resonator, third power to the wireless power receiver for charging the wireless power receiver.
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Accused Products
Abstract
A method and power transmitter for efficiently controlling power transmission to one or more power receivers in a wireless multi-power transmission system are provided. The method includes performing, when a predetermined measurement cycle arrives, a load measurement; comparing a current load measurement value with a previous load measurement value; determining whether the current load measurement value is increased over the previous load measurement value by at least as much as a first predetermined threshold; gradually increasing, when the load measurement value is increased over the previous load measurement value by at least as much as the first threshold, a transmission power value until a request for a subscription to a wireless multi-power transmission network from a power reception target within a predetermined time limit; and stopping, when the request for the subscription is not received before the time limit is exceeded, power transmission to the power reception target.
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14 Claims
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1. A method of controlling power transmission of a wireless power transmitter, the method comprising:
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transmitting, by a resonator, first power for detecting a change of impedance; in response to the change of impedance being detected, transmitting, by the resonator, second power for communicating with a wireless power receiver; increasing the second power from a first magnitude to a second magnitude, wherein the second magnitude is greater than the first magnitude; receiving, by a wireless communication unit, a search signal from the wireless power receiver while transmitting the second power; in response to receiving the search signal, transmitting, by the wireless communication unit, a connection request signal to the wireless power receiver; and transmitting, by the resonator, third power to the wireless power receiver for charging the wireless power receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless power transmitter for controlling power transmission comprising:
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a resonator; a wireless communication unit configured to perform wireless communication, and a controller configured to; control the resonator to transmit first power for detecting a change of impedance; control the resonator to, in response to the change of impedance being detected, transmit second power for communicating with a wireless power receiver; control the resonator to increase the second power from a first magnitude to a second magnitude, wherein the second magnitude is greater than the first magnitude; control the wireless communication unit to receive a search signal from the wireless power receiver; control the wireless communication unit to, in response to receiving the search signal, transmit a connection request signal to the wireless power receiver; and control the resonator to transmit third power to the wireless power receiver for charging the wireless power receiver. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification