Wireless charging method, and apparatus and system therefor
First Claim
1. A wireless charging method of a wireless power transmitter, the wireless charging method comprising:
- controlling transmitted power from the wireless power transmitter based on a feedback signal periodically received from a wireless power receiver during power transmission while the wireless power receiver is present in a charging area of the wireless power transmitter;
determining whether the wireless power receiver is present in the charging area of the wireless power transmitter during the power transmission of the transmitted power; and
in response to determining that the wireless power receiver is no longer present in the charging area, constantly maintaining a strength of the transmitted power while the wireless power receiver is absent from the charging area of the wireless power transmitter,wherein, in the constantly maintaining the strength of the transmitted power, the strength of the transmitted power which is constantly maintained is determined by any one of a strength of transmitted power adjusted based on a last received feedback information, a strength of an initially transmitted power when the power transmission starts, and a power strength corresponding to a category or class of the wireless power receiver.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to a wireless charging method, and an apparatus and a system therefor. A wireless charging method in a wireless power transmitter, according to an embodiment of the present invention, may comprise the steps of: controlling transmission power on the basis feedback signal periodically received from wireless power receiver during power transmission; determining whether or not the wireless power receiver is present in a charging area during the power transmission; and maintaining the intensity of the transmission power constant if the result of the determination shows that the wireless power receiver is not present in the charging area. Therefore, the present invention is advantageous that it is possible to prevent, in advance, the power transmission from being unnecessarily stopped against a user'"'"'s intention.
9 Citations
18 Claims
-
1. A wireless charging method of a wireless power transmitter, the wireless charging method comprising:
-
controlling transmitted power from the wireless power transmitter based on a feedback signal periodically received from a wireless power receiver during power transmission while the wireless power receiver is present in a charging area of the wireless power transmitter; determining whether the wireless power receiver is present in the charging area of the wireless power transmitter during the power transmission of the transmitted power; and in response to determining that the wireless power receiver is no longer present in the charging area, constantly maintaining a strength of the transmitted power while the wireless power receiver is absent from the charging area of the wireless power transmitter, wherein, in the constantly maintaining the strength of the transmitted power, the strength of the transmitted power which is constantly maintained is determined by any one of a strength of transmitted power adjusted based on a last received feedback information, a strength of an initially transmitted power when the power transmission starts, and a power strength corresponding to a category or class of the wireless power receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A wireless charging method of a wireless power transmitter, the wireless charging method comprising:
-
controlling transmitted power from the wireless power transmitter based on a feedback signal periodically received from a wireless power receiver during power transmission while the wireless power receiver is present in a charging area of the wireless power transmitter; determining whether the wireless power receiver is present in the charging area of the wireless power transmitter during the power transmission of the transmitted power; in response to determining that the wireless power receiver is no longer present in the charging area, decreasing a strength of the transmitted power by a predetermined level stepwise to a decreased level and transmitting the transmitted power at the decreased level while the wireless power receiver is not present in the charging area; and in response to the strength of the transmitted power being decreased to a predetermined threshold or less, stopping the power transmission of the transmitted power and entering an initial phase.
-
-
12. A wireless power transmitter comprising:
-
a communication unit configured to receive a periodic feedback signal transmitted by a wireless power receiver during power transmission of transmitted power by the wireless power transmitter while the wireless power receiver is present in a charging area of the wireless power transmitter; a power converter configured to control the transmitted power to the wireless power receiver based on the feedback signal; a receiver presence confirmation unit configured to determine whether the wireless power receiver is present in the charging area of the wireless power transmitter during the power transmission of the transmitter power; and a controller configured to; in response to determining that the wireless power receiver is no longer present in the charging area, control the power converter to constantly maintain a strength of the transmitted power, wherein the strength of the transmitted power which is constantly maintained is determined by any one of a strength of transmitted power adjusted based on a last received feedback information, a strength of an initially transmitted power when the power transmission starts, and a power strength corresponding to a category or class of the wireless power receiver. - View Dependent Claims (13, 14, 15, 16, 17, 18)
-
Specification