Electronics and Telecommunications Research Institute

Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

Lg Electronics Inc.

Yonsei University

Postech Academy-industry Foundation

Sk Corporation

Sang-Won Kim

Seong-Min Kim

In Kui Cho

Jung Ick Moon

Je Hoon Yun

Dong Won Jang

Ho Jin Lee

Gwangzeen Ko

Jaewoo Lee

Jang Yeol Kim

Hyunjoon Lee

Jong-Jin Park

Jung-kyun Im

Woo Cheon Park

Myung-Sun Song

Sang Bong Jeon

Seungyoung Ahn

Sunmin Lim

Changhyun Park

Chang-Joo Kim

Myung Sun Song

Hyung Do Choi

Jae-hyun Hur

Byung Chan Kim

Un-yong Jeong

Kyu-hyun Im

No-kyoung Park

Kibeom Kim

Yong-Seok Choi

Jin-hwan Park

Woo Jin Byun

Sun Woong Choi

Sang-hun Jeon

Geum-Jong Bae

Cha-Jea Jo

Jong Hwa Kwon

Hyun-Jung Song

In-Wook Cho

Hong-Seok Kim

Sung-Hyun Hwang

Sung-woo Hwang

Kwang-Chul Choi

Jung-Sun Um

Chung Sup Kim

Sang Han Lee

Myung-Yoon Um

Ji-Seok Hong

Ki Cheol Tae

Kanghee Kim

Hoiyoon Jung

Hoi-Yoon Jung

Byoung-jin Lee

Jun-Kun Choi

Eun-Kyoung Choi

Jin-hee Kim

Duk Ju Ahn

Seok-Jun Park

Ji-hyun Bae

Jeong-Un Choi

Sung-Jee Kim

Heung Yong Kang

Myoung-Kyu Seo

Geon-Woo Park

Min-Sik Ku

Seong-Geun Kim

Chwee Lin Choong

Hyung-wook Ha

Chwee Iin Choong

Saidul Alam Chowdhury

Seunghun Ryu

Sun-Min Lim

Shahid Ali Khan

Byoung-Mu Chang

Ahn-Seop Choi

Sin-Chul Kang

Sung-Joon Lee

Seuk-Hwan Chung

Jang-wook Choi

Jung-Kyun Im

Hyung-Wook Ha

Provided is a wireless power reception apparatus. The wireless power reception apparatus includes a resonant circuit including a first path and a second path, the first path including a first capacitor and a first gate connected in series, and the second path being connected in parallel with the first path and including a second capacitor and a second gate connected in series and a reception coil connected to the resonant circuit, configured to wirelessly receive power based on a capacitance of the resonant circuit, and to generate power according to the wirelessly received power, wherein the resonant circuit is configured to determine a gate driving signal to operate the first gate and the second gate and wherein the capacitance of the resonant circuit is determined according to the gate driving signal.

Wireless power reception apparatus

The present disclosure relates to a reduction coil and an electromagnetic wave reduction apparatus including the reduction coil, and more particularly, an electromagnetic wave reduction apparatus including a reduction coil between a transmission coil and a reception coil to reduce, through the reduction coil, unnecessary electromagnetic waves generated in a process of transmitting electromagnetic waves generated by the transmission coil to the reception coil.

Reduction coil for wireless charging and electromagnetic wave reduction apparatus including reduction coil

An image processing-based foreign substance detection method in a wireless charging system and a device performing the method are disclosed. A method for detecting a foreign substance includes an operation of acquiring an image of a charging area of a wireless charging system, an operation of detecting, based on an RGB value of a frame of the image, a foreign substance in the charging area, an operation of discriminating a type of the foreign substance, and an operation of performing power control of the wireless charging system according to the type of the foreign substance.

Image processing-based foreign substance detection method in wireless charging system and device performing method

Provided is a robot charging apparatus to wirelessly charge a robot capable of walking, which includes a plurality of receiving coils fixed to legs of a robot and a transmitting coil moved and provided according to a position of the robot and wirelessly charges the robot in such a manner that the transmitting coil is provided between the plurality of receiving coils and coupled to the receiving coils by a magnetic field output from the transmitting coil.

Robot charging apparatus

A wireless power transmission resonator using a conducting wire with a vertical rectangular cross-section is disclosed. The wireless power transmission resonator may include a first element including a first element upper part arranged in an upper end of a resonator and a first element lower part arranged in a lower end of the resonator, wherein the first element upper part and the first element lower part each may include a spiral layer having a spiral structure that is wound to face a wide surface of a conducting wire including a vertical rectangular cross-section and a second element arranged in a center of the resonator and between the first element upper part and the first element lower part and including a spiral layer having a spiral structure that is wound to face the wide surface of the conducting wire including the vertical rectangular cross-section.

Wireless power transmission resonator using conducting wire with vertical rectangular cross-section

A radio frequency (RF) weak magnetic field detection sensor includes a ferromagnetic core, a pickup coil disposed to surround the ferromagnetic core, a substrate that includes an opening, a core pad connected to the ferromagnetic core and a coil pad connected to the pickup coil, and an insulating tube interposed between the ferromagnetic core and the pickup coil. The insulating tube includes a bobbin around which the pickup coil is wound, and a core hole formed to pass through the bobbin and configured to accommodate the ferromagnetic core.

Radio frequency weak magnetic field detection sensor and method of manufacturing the same

An apparatus and method for transmitting and receiving magnetic field signals in a magnetic field communication system are provided. The apparatus includes a controller configured to generate a communication signal, matching units that are configured to receive the communication signal and that respectively correspond to different matching frequencies, and loop antennas that are connected to the matching units, respectively, and that are configured to convert communication signals according to the different matching frequencies into magnetic transmission signals in the form of magnetic field energy and to transmit the magnetic transmission signals.

Apparatus and method for transmitting and receiving magnetic field signals in magnetic field communication system

Provided is a spiral coil and wireless power transmission and reception circuit including the spiral coil. The spiral coil includes a conducting wire forming one or more coil turns, and a height of one side of the conducting wire in a direction of a central portion of the spiral coil and a height of another side of the conducting wire in an opposite direction to the central portion of the spiral coil in each of the coil turns are different from each other and the conducting wire includes at least one slot formed by an empty space between the one side and the other side, and an upper surface positioned above the one side and the other side and connecting the one side and the other side.

Spiral coil and wireless power transmission and reception circuit including the same

A magnetic field communication method and apparatus using a giant magnetoimpedance (GMI) magnetometer are disclosed. The magnetic field communication apparatus includes a GMI magnetometer configured to detect a first communication signal based on a received magnetic field signal, a first signal extractor configured to extract a second communication signal comprising a message signal from the first communication signal, a second signal extractor configured to extract a third communication signal by removing a magnetization frequency signal from the second communication signal, and a third signal extractor configured to extract the message signal by removing a carrier wave frequency signal from the third communication signal.

Magnetic field communication method and apparatus using GMI magnetometer

A wireless power receiving apparatus, according to an example embodiment, may include a receiving coil in which a first wire including a copper core and a second wire not including a copper core are wound around a same axis. The second wire may be located at a pitch of the first wire, and a diameter of the second wire may correspond to the pitch of the first wire.

Wireless power transmission system comprising reception coil having constant pitch

A wireless power transmission system and method are disclosed. The wireless power transmission system includes a plurality of wireless power transmitters configured to provide power to a plurality of wireless power receivers, and a controller configured to control the wireless power transmitters based on information of the wireless power receivers. The controller is configured to receive information of a wireless power receiver from the wireless power receiver, calculate a transmission parameter associated with a transmission efficiency of power to be provided to the wireless power receiver using the information of the wireless power receiver, and provide power to the wireless power receiver through the wireless power transmitters based on the transmission parameter.

System and method for wireless power transmission

Disclosed is a resonator for expanding a transfer distance. A conical resonator includes a metal layer configured to operate according to a resonant frequency, and a dielectric layer coupled to the top or bottom of the metal layer to space the metal layer apart from another metal layer without overlap, wherein the metal layer and the dielectric layer have a Swiss-roll structure, and include an input face to which power is supplied on the bottom and an open face on the top.

Conical resonator formed by winding a tape-shaped band in an overlapping manner into a truncated cone shape

The atomic magnetometer includes a light source device configured to output a linearly polarized irradiation light and a circularly polarized pump light, a first vapor cell including an alkali metal atom, receiving the linearly polarized irradiation light, and outputting a first transmitted light, a second vapor cell including an alkali metal atom, receiving the linearly polarized irradiation light, and outputting a second transmitted light, a magnetic field application device configured to apply a bias magnetic field in opposite directions to the first vapor cell and the second vapor cell, and a measuring device configured to obtain the magnetic field signal based on a differentiation of a first polarization rotation signal corresponding to a polarization state of the first transmitted light and a second polarization rotation signal corresponding to a polarization state of the second transmitted light.

Radio frequency atomic magnetometer through differential magnetic field polarization selection and operation method thereof

Disclosed is a wireless power transmitting device and method, the wireless power transmitting device including, in response to detection of a power receiver within a predetermined separation distance from a charging pad, a controller configured to generate a magnetic field through a transmission coil with a multilayer structure in which a plurality of coil layers of different sizes are stacked, and a power transmitter configured to wirelessly transmit, to a reception coil of the power receiver, a power signal generated using magnetic fields generated by the plurality of coil layers.

Wireless power transmitting device and method

Growing community of inventors

Daejeon, South Korea

Sang-Won Kim