Patents by Inventor Young Woon Choi

Young Woon Choi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10886783
    Abstract: A wireless power transmission apparatus includes: an alternating current (AC) power output to convert input power into AC power and output the AC power; and a power transmitter including a plurality of resonators. The power transmitter receives the AC power and wirelessly transmits the AC power in a first operating mode in which two of the resonators are connected in series and the two resonators transmit the AC power, and in a second operating mode in which one of the resonators transmits the AC power.
    Type: Grant
    Filed: October 15, 2018
    Date of Patent: January 5, 2021
    Assignee: WITS Co., Ltd.
    Inventors: Se Joo Kim, Tae Seok Ko, Young Woon Choi, Joung Ho Son, Doo Young Song
  • Patent number: 10516446
    Abstract: A wireless power transmitter includes a switch circuit including switches connected to a transmission resonator; a current detector configured to detect a transient current induced in the transmission resonator; and a controller configured to control the switch circuit and adjust an output of the wireless power transmitter based on an amplitude of the transient current.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: December 24, 2019
    Assignee: WITS Co., Ltd.
    Inventors: In Wha Jeong, Young Woon Choi, Se Joo Kim
  • Patent number: 10505098
    Abstract: A drive signal generating apparatus includes a transducer configured to convert electromagnetic energy of a signal received through a first port into a different type of energy, convert the different type of energy into electromagnetic energy, and transfer the converted electromagnetic energy to a second port, and a switching circuit configured to perform a gate switching operation, upon receiving a signal from the second port, to generate a drive signal.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: December 10, 2019
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: In Wha Jeong, Young Woon Choi, Tae Won Heo
  • Patent number: 10410787
    Abstract: A coil module includes a magnetic substance plate, a first coil, and a second coil. The magnetic substance plate includes a first area having a first magnetic permeability and a second area having a second magnetic permeability. The first coil is disposed on a surface of the magnetic substance plate. The second coil is disposed on the surface of the magnetic substance plate and partially overlapping the first coil. A portion of the first coil, not overlapping the second coil, is disposed on a surface of the first area, and a portion of the second coil, not overlapping the first coil, is disposed on a surface of the second area.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: September 10, 2019
    Assignee: WITS Co., Ltd.
    Inventors: In Wha Jeong, Ki Hong Kim, Young Woon Choi, Young Seung Roh
  • Publication number: 20190222065
    Abstract: A wireless power transmission apparatus includes: an alternating current (AC) power output to convert input power into AC power and output the AC power; and a power transmitter including a plurality of resonators. The power transmitter receives the AC power and wirelessly transmits the AC power in a first operating mode in which two of the resonators are connected in series and the two resonators transmit the AC power, and in a second operating mode in which one of the resonators transmits the AC power.
    Type: Application
    Filed: October 15, 2018
    Publication date: July 18, 2019
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Se Joo KIM, Tae Seok KO, Young Woon CHOI, Joung Ho SON, Doo Young SONG
  • Patent number: 10277074
    Abstract: A wireless power transmitter includes a common bridge circuit configured to apply a first alternating current (AC) voltage to a terminal of each of a first resonator and a second resonator of the resonators, a first sub-bridge circuit configured to apply a second alternating current (AC) voltage to another terminal of the first resonator while the first alternating current (AC) voltage is being applied to the terminal of the first resonator, and a second sub-bridge circuit configured to apply a third alternating current (AC) voltage to another terminal of the second resonator while the first alternating current (AC) voltage is being applied to the terminal of the first resonator.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: April 30, 2019
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Se Joo Kim, Sang Ho Cho, Hyo Young Kim, In Wha Jeong, Ki Hong Kim, Young Woon Choi
  • Publication number: 20180254142
    Abstract: A coil module includes a magnetic substance plate, a first coil, and a second coil. The magnetic substance plate includes a first area having a first magnetic permeability and a second area having a second magnetic permeability. The first coil is disposed on a surface of the magnetic substance plate. The second coil is disposed on the surface of the magnetic substance plate and partially overlapping the first coil. A portion of the first coil, not overlapping the second coil, is disposed on a surface of the first area, and a portion of the second coil, not overlapping the first coil, is disposed on a surface of the second area.
    Type: Application
    Filed: November 1, 2017
    Publication date: September 6, 2018
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: In Wha JEONG, Ki Hong KIM, Young Woon CHOI, Young Seung ROH
  • Publication number: 20180155119
    Abstract: A cargo container is provided. The cargo container includes a frame part, a panel part, a plurality of lead screws and a plurality of guide brackets, so that the cargo container may be operated in a fixing mode or a folding mode according to loading or unloading of cargo. Thus, the volume in the folding mode may be reduced, and transport with stacked may be facilitated, so that a highly efficient cargo container may be provided that is easy to store and transport.
    Type: Application
    Filed: November 30, 2017
    Publication date: June 7, 2018
    Applicant: SEOUL NATIONAL UNIVERSITY OF TECHNOLOGY CENTER FOR INDUSTRY COLLABORATION
    Inventors: Jong Bong KIM, Eun Young LIM, Young Woon CHOI
  • Publication number: 20180083669
    Abstract: A wireless power transmitter includes a switch circuit including switches connected to a transmission resonator; a current detector configured to detect a transient current induced in the transmission resonator; and a controller configured to control the switch circuit and adjust an output of the wireless power transmitter based on an amplitude of the transient current.
    Type: Application
    Filed: August 25, 2017
    Publication date: March 22, 2018
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: In Wha JEONG, Young Woon CHOI, Se Joo KIM
  • Patent number: 9899881
    Abstract: A wireless power transmitting device includes: a rectifier configured to rectify alternating current (AC) power; a capacitor configured to store the rectified AC power as direct current (DC) power; a voltage divider configured to divide a voltage of the DC power; and a wireless power transmitter configured to wirelessly transmit power using the voltage divided by the voltage divider.
    Type: Grant
    Filed: April 15, 2016
    Date of Patent: February 20, 2018
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: In Wha Jeong, Young Woon Choi, Tae Won Heo
  • Publication number: 20170271923
    Abstract: A wireless power transmitter includes a common bridge circuit configured to apply a first alternating current (AC) voltage to a terminal of each of a first resonator and a second resonator of the resonators, a first sub-bridge circuit configured to apply a second alternating current (AC) voltage to another terminal of the first resonator while the first alternating current (AC) voltage is being applied to the terminal of the first resonator, and a second sub-bridge circuit configured to apply a third alternating current (AC) voltage to another terminal of the second resonator while the first alternating current (AC) voltage is being applied to the terminal of the first resonator.
    Type: Application
    Filed: December 29, 2016
    Publication date: September 21, 2017
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Se Joo KIM, Sang Ho CHO, Hyo Young KIM, In Wha JEONG, Ki Hong KIM, Young Woon CHOI
  • Publication number: 20170077384
    Abstract: A drive signal generating apparatus includes a transducer configured to convert electromagnetic energy of a signal received through a first port into a different type of energy, convert the different type of energy into electromagnetic energy, and transfer the converted electromagnetic energy to a second port, and a switching circuit configured to perform a gate switching operation, upon receiving a signal from the second port, to generate a drive signal.
    Type: Application
    Filed: April 6, 2016
    Publication date: March 16, 2017
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: In Wha JEONG, Young Woon CHOI, Tae Won HEO
  • Publication number: 20160359369
    Abstract: A wireless power transmitting device includes: a rectifier configured to rectify alternating current (AC) power; a capacitor configured to store the rectified AC power as direct current (DC) power; a voltage divider configured to divide a voltage of the DC power; and a wireless power transmitter configured to wirelessly transmit power using the voltage divided by the voltage divider.
    Type: Application
    Filed: April 15, 2016
    Publication date: December 8, 2016
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: In Wha JEONG, Young Woon CHOI, Tae Won HEO
  • Patent number: 8699241
    Abstract: There is provided a switching mode power supply including: a direct current (DC)/DC converting unit converting a DC power level; an auxiliary power supply unit discharged in a no load mode in which a load is not connected to an output terminal of the DC/DC converting unit; and a controlling unit sensing a change in impedance according to whether or not the load is connected to the output terminal to thereby determine whether or not the switching mode power supply is in the no load mode, and driving a pulse width modulation integrated chip (PWM IC) when a voltage level of the auxiliary power supply unit is at a preset level or less in the no load mode.
    Type: Grant
    Filed: September 27, 2011
    Date of Patent: April 15, 2014
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Byoung Woo Ryu, Young Woon Choi, Seong Wook Choi
  • Publication number: 20120256491
    Abstract: There is provided a switching mode power supply including: a direct current (DC)/DC converting unit converting a DC power level; an auxiliary power supply unit discharged in a no load mode in which a load is not connected to an output terminal of the DC/DC converting unit; and a controlling unit sensing a change in impedance according to whether or not the load is connected to the output terminal to thereby determine whether or not the switching mode power supply is in the no load mode, and driving a pulse width modulation integrated chip (PWM IC) when a voltage level of the auxiliary power supply unit is at a preset level or less in the no load mode.
    Type: Application
    Filed: September 27, 2011
    Publication date: October 11, 2012
    Inventors: Byoung Woo RYU, Young Woon Choi, Seong Wook Choi