Wireless power transmission device

Patent metadata

Field	Value
Publication number	US-11979032-B2
Application number	US-202017597500-A
Country	US
Kind code	B2
Filing date	May 15, 2020
Priority date	Jul 8, 2019
Publication date	May 7, 2024
Grant date	May 7, 2024

Abstract

A wireless power transmission device according to an embodiment of the present specification comprises: a power conversion circuit for transmitting wireless power to a wireless power reception device by means of magnetic coupling with the wireless power reception device at an operating frequency; and a communication/control circuit for communicating with the wireless power reception device by using in-band communication that uses the operating frequency and/or out-band communication that uses a frequency other than the operating frequency, and for communicating with at least one other wireless power transmission device by using the out-band communication, wherein the communication/control circuit measures the distance to the wireless power reception device and transmits the information about the measured first distance to the other wireless power transmission device.

First claim

What is claimed is:

1. A wireless power transmitter comprising:
a power conversion circuit configured to transmit wireless power to a wireless power receiver by magnetic coupling with the wireless power receiver at an operating frequency; and
a communication/control circuit configured to communicate with the wireless power receiver using in-band communication using the operating frequency and out-band communication using a frequency other than the operating frequency, and communicate with at least one other wireless power transmitter using the out-band communication,
wherein the communication/control circuit is configured to:
receive, from a wireless power receiver via the in-band communication, a configuration packet including a out-band flag which informs whether the wireless power receiver supports the out-band communication,
transmit, to the wireless power receiver via the in-band communication, the wireless power,
measure, via the out-band communication, a distance between the wireless power transmitter and the wireless power receiver based on a specific criteria,
transmit, to another wireless power transmitter via the out-band communication, first distance information when the distance between the wireless power transmitter and the wireless power receiver is changed,
receive, from the another wireless power transmitter via the out-band communication, second distance information including a distance between the another wireless power transmitter and the wireless power receiver,
wherein, based on the first distance information informing that the wireless power receiver is moving further away from the wireless power transmitter and the second distance information informing that the wireless power receiver is getting closer to the another wireless power transmitter, the wireless power transmitter determines that the wireless power receiver moves from the wireless power transmitter to the another wireless power transmitter, and
wherein, based on the wireless power transmitter determining that the wireless power receiver moves from the wireless power transmitter to the another wireless power transmitter and, based on the wireless power transmitter transmitting the wireless power to the wireless power receiver, the wireless power transmitter stops transmitting the wireless power to the wireless power receiver.

Assignees

• Lg Electronics Inc

Inventors

• Choi Jingu
• Lim Jinkwon
• Lee Minsoo
• Park Joonho
• Kim Jaehyu
• Park Yongcheol

Classifications

• H02J50/40 Primary

  using two or more transmitting or receiving devices (H02J50/50 takes precedence) · CPC title

• H02J50/12 Primary

  of the resonant type · CPC title

• H02J50/80

  involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title

• H02J50/90

  involving detection or optimisation of position, e.g. alignment · CPC title

• H02J50/60

  responsive to the presence of foreign objects, e.g. detection of living beings · CPC title