公开(公告)号：US11277038B2

公开(公告)日：2022-03-15

申请号：US16713035

申请日：2019-12-13

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Yongju Park ,  Yongseong Kim ,  Yongseok Lim

IPC: H02J50/80 ,  H02J50/50

Abstract: A power transmitting unit (PTU) for wireless power transmission (WPT) includes a communication transceiver and a power controller. The communication transceiver connects a communication link with at least one power receiving unit (PRU) through legacy communication and exchanges parameters necessary for the WPT through the connected communication link. The power controller is configured to transmit, to the PRU, a PTU beacon containing information about a dedicated power slot (DPS) allocated to the PRU in a super frame including a plurality of DPSs, to receive a PRU beacon from the PRU, to extract a phase difference between a plurality of antennas by analyzing a continuous wave (CW) of the PRU beacon, and to transmit power to the PRU in the allocated DPS in consideration of the phase difference.

公开(公告)号：US11264843B1

公开(公告)日：2022-03-01

申请号：US17127419

申请日：2020-12-18

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Yong Seok Lim ,  Hae Yong Jung ,  Tai Gil Kwon ,  Yong Seong Kim ,  Yongju Park

IPC: H02J50/60 ,  H02J50/12 ,  H02J50/40 ,  B60L53/55 ,  B60L53/30 ,  B60L53/124

Abstract: The present invention provides a system tar wireless power transmission, wherein the system is a system for wireless power transmission detecting a foreign object, including a power transmitting coil for transmitting AC power, a power receiving coil for receiving the AC power transmitted from the power transmitting coil wherein the power receiving coil is spaced apart from the power transmitting coil, and a detection circuit for detecting a foreign object located between the power transmitting coil and the power receiving coil wherein a first resistor and a first detection coil connected in series, and a second resistor and a second detection coil connected in series are connected in parallel, and wherein at least one of the first detection coil and the second detection coil is disposed between the power transmitting coil and the power receiving coil.

公开(公告)号：US11246096B2

公开(公告)日：2022-02-08

申请号：US16727339

申请日：2019-12-26

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Yongju Park ,  Younghan Kim ,  Hyunseuk Ahn ,  Changseok Yun ,  Seungok Lim ,  Yongseok Lim

IPC: H04L12/28 ,  H04W52/02 ,  H04L27/04 ,  H04W84/18

Abstract: The present disclosure provides communications apparatus and method using an On-off keying (OOK) modulation based low power wake-up protocol suitable for use in IoT devices. The communication method according to an exemplary embodiment includes: transmitting, by a main radio module of a master device, an OOK modulated wake-up radio signal by using a narrow frequency band between an ISM band and a guard band in the ISM band; receiving, by a low power wake-up radio module of a slave device, the wake-up radio signal and to demodulate according to an OOK modulation scheme and awaken a controller of the slave device in a sleep mode; and after the controller wakes up from the sleep mode, transmitting data to be transmitted to the master device, by the controller of the slave device, through the main radio module.