公开(公告)号：US10454303B2

公开(公告)日：2019-10-22

申请号：US14547449

申请日：2014-11-19

Applicant: WITS Co., Ltd.

Inventor： Si Hyung Kim ,  Soon Tack Oh ,  Hyun Keun Lim ,  Sung Uk Lee ,  Ki Won Chang ,  Chul Gyun Park ,  Jae Suk Sung ,  Chang Soo Kang

IPC: H02J50/10 ,  H02J5/00 ,  H02J50/90 ,  H02J17/00 ,  H04B5/00 ,  H02J7/02 ,  H02J9/00

Abstract: There are provided a non-contact power supply device and a non-contact power supply method, in which a short beacon is transmitted to recognize a power receiving device, a long beacon is transmitted to wake-up a communications circuit of the power receiving device, and charging power is transmitted in a contactless manner, wherein at least one of signal levels of the short beacon and signal levels of the long beacon is varied.

公开(公告)号：US10673131B2

公开(公告)日：2020-06-02

申请号：US15994021

申请日：2018-05-31

Applicant: WITS Co., Ltd.

Inventor： Dae Ung Ahn ,  Jae Hyoung Cho ,  Dae Seong Jeon ,  Sung Uk Lee ,  Ki Won Chang

IPC: H01Q1/38 ,  H01Q7/00 ,  G06K19/077 ,  H04B5/00 ,  G06K19/07 ,  H01F27/38 ,  H01Q1/22 ,  H01F27/00 ,  H01Q1/40 ,  H01F27/28 ,  H01Q21/28 ,  H01F38/14 ,  H01F5/00 ,  H02J7/02 ,  H02J50/10

Abstract: A coil assembly includes: a substrate; and a coil wiring coupled to the substrate and including a spiral wiring and a lead wiring, wherein the spiral wiring includes a first section forming an outer portion of the spiral wiring and a second section, disposed inside the first section, and having a line width narrower than a line width of the first section.

公开(公告)号：US10404090B2

公开(公告)日：2019-09-03

申请号：US15045774

申请日：2016-02-17

Applicant: WITS Co., Ltd.

Inventor： Sung Uk Lee ,  Tae Sung Kim ,  Si Hyung Kim ,  Hee Sun Han

IPC: H02J5/00 ,  H02J7/02 ,  H02J50/12 ,  H02J50/80

Abstract: A wireless power transmitting method performed in a wireless power transmitting apparatus includes transmitting a long beacon signal via a transmitting coil; determining whether or not a response signal to the long beacon signal has been received at a wireless communicator; determining whether or not a degree of change in a level of impedance of the transmitting coil is within a reference range responsive to the determination that the response signal is not received; and wirelessly transmitting the power responsive to the determination: that the response signal has been received or that the degree of change is within the reference range.