Patents by Inventor Hyung Do Choi

Hyung Do 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: 11041895
    Abstract: A probe antenna, a probing system, and a power density measuring method to measure a power density of a near-field electromagnetic field are disposed. The probe antenna includes a board, and a conductor transmitting line formed on the board, having a constant line width, and formed in a polygonal shape or in a closed-curve shape. The conductor transmitting line is divided into a first transmitting line and a second transmitting line that are separated from each other, and includes a first receiving port formed with one end of the first transmitting line and one end of the second transmitting line and a second receiving port formed with another end of the first transmitting line and another end of the second transmitting line.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: June 22, 2021
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jung Hwan Hwang, Duk Soo Kwon, Chang Hee Hyoung, Jong Hwa Kwon, Hyung Do Choi
  • Publication number: 20210181245
    Abstract: A probe antenna, a probing system, and a power density measuring method to measure a power density of a near-field electromagnetic field are disposed. The probe antenna includes a board, and a conductor transmitting line formed on the board, having a constant line width, and formed in a polygonal shape or in a closed-curve shape. The conductor transmitting line is divided into a first transmitting line and a second transmitting line that are separated from each other, and includes a first receiving port formed with one end of the first transmitting line and one end of the second transmitting line and a second receiving port formed with another end of the first transmitting line and another end of the second transmitting line.
    Type: Application
    Filed: April 17, 2020
    Publication date: June 17, 2021
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jung Hwan HWANG, Duk Soo KWON, Chang Hee HYOUNG, JONG HWA KWON, Hyung Do CHOI
  • Patent number: 10727701
    Abstract: Provided is a wireless power reception apparatus which receives a power from a wireless power transmission apparatus. A wireless power reception apparatus which receives a power from a wireless power transmission apparatus, the wireless power reception apparatus comprising a duty controller configured to control a duty cycle; a power converter configured to convert an effective load resistance according to the duty cycle; a reception resonator configured to receive a power from a transmission coil of the wireless power transmission apparatus, wherein the duty cycle and a current of the transmission coil is adjusted based on a load resistance of the wireless power reception apparatus.
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: July 28, 2020
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Duk Ju Ahn, In Kui Cho, Seong Min Kim, Jung Ick Moon, Sang Bong Jeon, Byung Chan Kim, Je Hoon Yun, Dong Won Jang, Hyung Do Choi
  • Patent number: 10673278
    Abstract: Provided is a wireless power transmission device to reduce an electromagnetic wave except for a signal to be transmitted during wireless power transmission, the wireless power transmission device including a transmitter configured to generate a magnetic field by inputting a high-frequency power signal generated by a transmission circuit into a first coil, a receiver configured to generate an induced current by allowing the generated magnetic field to pass through a second coil, and a reducer configured to reduce a harmonic component of the high-frequency power signal using a third coil inserted on a path between the transmitter and the receiver.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: June 2, 2020
    Assignees: Electronics and Telecommunications Research Institute, DONGYANG E&P INC.
    Inventors: Jung Ick Moon, Seong Uk Baek, Byoung In Lee, Woo Chul Lee, Jong Seup Lee, Dong Woo Cheon, Sang Bong Jeon, Seong Min Kim, Duk Ju Ahn, In Kui Cho, Byung Chan Kim, Je Hoon Yun, Dong Won Jang, Hyung Do Choi
  • Patent number: 10627456
    Abstract: Disclosed is a magnetic field shielding apparatus including an energy transmitter configured to generate a magnetic field, an energy receiver configured to receive the magnetic field generated by the energy transmitter, and a magnetic shield configured to shield a leaked magnetic field that is not received by the energy receiver, the magnetic shield including at least one closed region through which the leaked magnetic field passes, and at least one open region including a protrusion through which the leaked magnetic field moves to an inside of the magnetic field shielding apparatus after absorbed into the closed region.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: April 21, 2020
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Byung Chan Kim, Sang-Won Kim, Seong-Min Kim, Jung Ick Moon, Sang Bong Jeon, In Kui Cho, Hyung Do Choi
  • Patent number: 10581277
    Abstract: Provided is an apparatus for reducing an electromagnetic wave in a wireless power transmitter using a reducing coil, the apparatus that may cancel external emission of a magnetic field formed at a transmission coil using the reducing coil based on induced electromotive force.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: March 3, 2020
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sang Bong Jeon, Jung Ick Moon, Sang-Won Kim, Seong-Min Kim, In Kui Cho, Jong Hwa Kwon, Byung Chan Kim, Hyung Do Choi
  • Patent number: 10505384
    Abstract: Disclosed is a wireless charging apparatus and method, the apparatus including a controller configured to control the wireless charging apparatus, and a transmitter configured to form a rotating magnetic field in a three-dimensional (3D) space in response to a first clock signal and a second clock signal generated under a control of the controller, wherein a phase difference between the first clock signal and the second clock signal is 90 degrees.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: December 10, 2019
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sang Won Kim, Seong Min Kim, Jung Ick Moon, Sang Bong Jeon, In Kui Cho, Je Hoon Yun, Dong Won Jang, Hyung Do Choi
  • Patent number: 10492731
    Abstract: An exemplary embodiment of the present invention discloses a microwave signal processing method and apparatus which precisely focus a microwave onto a specific part of a biological tissue and rapidly images a temperature distribution in the biological tissue generated thereby.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: December 3, 2019
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Seong Ho Son, Jong Hwa Kwon, Soon Ik Jeon, Hyung Do Choi
  • Patent number: 10483787
    Abstract: Provided is a wireless charging apparatus for performing wireless charging of an electronic device including a receiving coil located in a three-dimensional (3D) wireless charging zone using a plurality of transmitting coils arranged in the 3D wireless charging zone and at least one power source configured to supply a current to the plurality of transmitting coils.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: November 19, 2019
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: In Kui Cho, Seong Min Kim, Jung Ick Moon, Duk Ju Ahn, Je Hoon Yun, Hyung Do Choi, Dong Won Jang
  • Publication number: 20190273400
    Abstract: Provided is a wireless power reception apparatus which receives a power from a wireless power transmission apparatus. A wireless power reception apparatus which receives a power from a wireless power transmission apparatus, the wireless power reception apparatus comprising a duty controller configured to control a duty cycle; a power converter configured to convert an effective load resistance according to the duty cycle; a reception resonator configured to receive a power from a transmission coil of the wireless power transmission apparatus, wherein the duty cycle and a current of the transmission coil is adjusted based on a load resistance of the wireless power reception apparatus.
    Type: Application
    Filed: May 17, 2019
    Publication date: September 5, 2019
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Duk Ju AHN, In Kui CHO, Seong Min KIM, Jung Ick MOON, Sang Bong JEON, Byung Chan KIM, Je Hoon YUN, Dong Won JANG, Hyung Do CHOI
  • Publication number: 20190165600
    Abstract: Provided is a wireless charging apparatus for performing wireless charging of an electronic device including a receiving coil located in a three-dimensional (3D) wireless charging zone using a plurality of transmitting coils arranged in the 3D wireless charging zone and at least one power source configured to supply a current to the plurality of transmitting coils.
    Type: Application
    Filed: February 1, 2019
    Publication date: May 30, 2019
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: In Kui CHO, Seong Min KIM, Jung Ick MOON, Duk Ju AHN, Je Hoon YUN, Hyung Do CHOI, Dong Won JANG
  • Patent number: 10298066
    Abstract: The wireless power reception apparatus includes: a duty controller configured to calculate an amount of current of a transmission coil required for the wireless power transmission apparatus and control a duty cycle by using at least one of distance information between the wireless power transmission apparatus and the wireless power reception apparatus or load current information; a power converter configured to convert an effective load resistance according to the duty cycle; a wireless data transmitter configured to transmit a signal that requires a control of the calculated amount of current of the transmission coil to the wireless power transmission apparatus; and a reception resonator configured to receive a power according to the amount of current of the transmission coil controlled by the signal that requires a control of the amount of current of the transmission coil from the wireless power transmission apparatus.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: May 21, 2019
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Duk Ju Ahn, In Kui Cho, Seong Min Kim, Jung Ick Moon, Sang Bong Jeon, Byung Chan Kim, Je Hoon Yun, Dong Won Jang, Hyung Do Choi
  • Patent number: 10199853
    Abstract: Provided is a wireless charging apparatus for performing wireless charging of an electronic device including a receiving coil located in a three-dimensional (3D) wireless charging zone using a plurality of transmitting coils arranged in the 3D wireless charging zone and at least one power source configured to supply a current to the plurality of transmitting coils.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: February 5, 2019
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: In Kui Cho, Seong Min Kim, Jung Ick Moon, Duk Ju Ahn, Je Hoon Yun, Hyung Do Choi, Dong Won Jang
  • Patent number: 10122202
    Abstract: Provided is an energy charging apparatus including a transponder configured to transmit and receive radio energy, and a resonator configured to transmit the radio energy transmitted from the transponder to at least one external device and transmit the radio energy received from the at least one external device to the transponder, wherein each of the transponder and the resonator is provided in a form of a single module.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: November 6, 2018
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: In Kui Cho, Seong Min Kim, Jung Ick Moon, Je Hoon Yun, Woo Jin Byun, Hyung Do Choi
  • Publication number: 20180235112
    Abstract: Disclosed is a magnetic field shielding apparatus including an energy transmitter configured to generate a magnetic field, an energy receiver configured to receive the magnetic field generated by the energy transmitter, and a magnetic shield configured to shield a leaked magnetic field that is not received by the energy receiver, the magnetic shield including at least one closed region through which the leaked magnetic field passes, and at least one open region including a protrusion through which the leaked magnetic field moves to an inside of the magnetic field shielding apparatus after absorbed into the closed region.
    Type: Application
    Filed: May 19, 2017
    Publication date: August 16, 2018
    Applicant: Electronics and Telecommunications Research Instit Institute
    Inventors: Byung Chan KIM, Sang-Won KIM, Seong-Min KIM, Jung Ick MOON, Sang Bong JEON, In Kui CHO, Hyung Do CHOI
  • Publication number: 20180152049
    Abstract: Provided is an apparatus for reducing an electromagnetic wave in a wireless power transmitter using a reducing coil, the apparatus that may cancel external emission of a magnetic field formed at a transmission coil using the reducing coil based on induced electromotive force.
    Type: Application
    Filed: February 9, 2017
    Publication date: May 31, 2018
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Sang Bong JEON, Jung Ick MOON, Sang-Won KIM, Seong-Min KIM, In Kui CHO, Jong Hwa KWON, Byung Chan KIM, Hyung Do CHOI
  • Publication number: 20180138995
    Abstract: Disclosed herein are an apparatus and method for measuring a broadband Passive Intermodulation Distortion (PIMD) signal. The apparatus for measuring a broadband PIMD signal includes a Radio Frequency (RF) processing unit for combining one or more transmission signals into a single output signal and transmitting the output signal to a feeder so as to measure a PIMD signal and for generating a beat frequency signal using the PIMD signal received from the feeder, and a digital processing unit for transferring a control signal required so as to control the RF processing unit, receiving the beat frequency signal, and then measuring a location of a passive element in the feeder in which the PIMD signal has been generated by performing digital signal processing on the beat frequency signal.
    Type: Application
    Filed: November 13, 2017
    Publication date: May 17, 2018
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Kyu-Min KANG, Jae-Cheol PARK, Seung-Keun PARK, Sung-Jin YOO, Hye-Yeon KWON, Yun-Bae KIM, Igor KIM, Jung-Sun UM, Young-Hwan LEE, Hoi-Yoon JUNG, Su-Na CHOI, Hyung-Do CHOI, Sung-Hyun HWANG
  • Publication number: 20180131219
    Abstract: Disclosed is a wireless charging apparatus and method, the apparatus including a controller configured to control the wireless charging apparatus, and a transmitter configured to form a rotating magnetic field in a three-dimensional (3D) space in response to a first clock signal and a second clock signal generated under a control of the controller, wherein a phase difference between the first clock signal and the second clock signal is 90 degrees.
    Type: Application
    Filed: February 9, 2017
    Publication date: May 10, 2018
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Sang Won KIM, Seong Min Kim, Jung Ick MOON, Sang Bong JEON, In Kui Cho, Je Hoon Yun, Dong Won Jang, Hyung Do Choi
  • Patent number: 9961647
    Abstract: A device for controlling exposure of electromagnetic waves from a base station collects a power value received from at least one base station together with position information using a plurality of terminals in a controlled area; maps the received power value collected from the terminals on a plurality of subareas in the controlled area based on position information collected from the terminals; calculates a power density for respective frequency bandwidths in the respective subareas by using the received power value of the terminals provided in the respective subareas; and calculates a specific absorption rate of electromagnetic waves in a human body in the respective subareas by using a power density value for respective frequency bandwidths in the respective subareas.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: May 1, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Ae Kyoung Lee, Jong Hwa Kwon, Hyung Do Choi
  • Patent number: 9900889
    Abstract: Disclosed is a method for allocating a resource of a terminal. The method includes: receiving downlink data from a base station; and allocating a resource for a device-to-device communication to a sub-frame by considering a hybrid ARQ (HARQ) transmission delay with respect to the received downlink data.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: February 20, 2018
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hoi Yoon Jung, Jung Sun Um, Byung Jang Jeong, Hyung Do Choi