Patents by Inventor Hyun Joo Chang

Hyun Joo Chang 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).

  • Publication number: 20240147315
    Abstract: A method of a terminal may comprise: receiving, from a CU of a base station, configuration information of one or more candidate cells and configuration information for measurement; performing L1 measurement on the candidate cells based on the configuration information for measurement; acquiring uplink synchronization for the candidate cells by performing an uplink synchronization management procedure for the candidate cells based on the configuration information of the candidate cells; reporting a result of the L1 measurement to a DU of the base station; receiving, from the DU of the base station, information on a target cell, being the target cell to switch among the candidate cells, based on the result of the L1 measurement; and applying the uplink synchronization acquired through the uplink synchronization management procedure to the target cell.
    Type: Application
    Filed: November 2, 2023
    Publication date: May 2, 2024
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Hyun Seo PARK, Yong Jin KWON, Yun Joo KIM, Han Jun PARK, Jung Bo SON, An Seok LEE, Yu Ro LEE, Sun Cheol CHANG, Heesoo LEE
  • Publication number: 20240107441
    Abstract: A method of a terminal may comprise: receiving a first message including state information of a base station from the base station; identifying preliminary inactive state information included in the first message when the state information of the base station indicates a preliminary inactive state; and performing a cell selection based on the preliminary inactive state information.
    Type: Application
    Filed: September 26, 2023
    Publication date: March 28, 2024
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hyun Seo PARK, Yong Jin KWON, Yun Joo KIM, Han Jun PARK, Jung Bo SON, An Seok LEE, Yu Ro LEE, Heesoo LEE, Sung Cheol CHANG
  • Patent number: 11248960
    Abstract: A high resolution inspection apparatus using a terahertz Bessel beam. The high resolution inspection apparatus comprises a terahertz wave generating unit for generating a terahertz wave; a Bessel beam forming unit for generating a terahertz Bessel beam using the terahertz wave incident from the terahertz wave generating unit; a ring beam forming unit for forming a ring beam using the terahertz Bessel beam and concentrating the formed ring beam to an inspection target object; a scattered light detecting unit for detecting scattered light generated from the inspection target object; and a ring beam detecting unit for detecting a ring beam transmitted through the inspection target object.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: February 15, 2022
    Assignee: KOREA FOOD RESEARCH INSTITUTE
    Inventors: Gyeong-Sik Ok, Sung-Wook Choi, Hyun-Joo Chang
  • Publication number: 20210140823
    Abstract: A high resolution inspection apparatus using a terahertz Bessel beam. The high resolution inspection apparatus comprises a terahertz wave generating unit for generating a terahertz wave; a Bessel beam forming unit for generating a terahertz Bessel beam using the terahertz wave incident from the terahertz wave generating unit; a ring beam forming unit for forming a ring beam using the terahertz Bessel beam and concentrating the formed ring beam to an inspection target object; a scattered light detecting unit for detecting scattered light generated from the inspection target object; and a ring beam detecting unit for detecting a ring beam transmitted through the inspection target object.
    Type: Application
    Filed: December 30, 2020
    Publication date: May 13, 2021
    Inventors: Gyeong-Sik OK, Sung-Wook CHOI, Hyun-Joo CHANG
  • Patent number: 10955293
    Abstract: According to one embodiment of the present invention, a terahertz wave concentrating module can comprise: a first lens for changing a terahertz wave, which is emitted while a terahertz Bessel beam penetrates an object to be inspected, so as to have a small angle; and a second lens for concentrating, on a detector, the terahertz wave having passed through the first lens.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: March 23, 2021
    Assignee: KOREA FOOD RESEARCH INSTITUTE
    Inventors: Gyeong-Sik Ok, Sung-Wook Choi, Hyun-Joo Chang
  • Patent number: 10768049
    Abstract: A high resolution inspection apparatus using a terahertz Bessel beam. The high resolution inspection apparatus comprises a terahertz wave generating unit for generating a terahertz wave; a Bessel beam forming unit for forming a terahertz Bessel beam at an inspection target object using a terahertz wave incident from the terahertz wave generating unit; a first lens for changing an angle of the terahertz wave radiated, when the terahertz Bessel beam is transmitted through the inspection target object, to be smaller; a second lens for concentrating the terahertz wave passing through the first lens and toward a detection unit; and a terahertz wave detection unit for detecting the terahertz wave concentrated by the second lens.
    Type: Grant
    Filed: February 25, 2020
    Date of Patent: September 8, 2020
    Assignee: KOREA RESEARCH INSTITUTE
    Inventors: Gyeong-Sik Ok, Sung-Wook Choi, Hyun-Joo Chang
  • Publication number: 20200240844
    Abstract: According to one embodiment of the present invention, a terahertz wave concentrating module can comprise: a first lens for changing a terahertz wave, which is emitted while a terahertz Bessel beam penetrates an object to be inspected, so as to have a small angle; and a second lens for concentrating, on a detector, the terahertz wave having passed through the first lens.
    Type: Application
    Filed: February 25, 2020
    Publication date: July 30, 2020
    Inventors: Gyeong-Sik OK, Sung-Wook CHOI, Hyun-Joo CHANG
  • Publication number: 20200191656
    Abstract: A high resolution inspection apparatus using a terahertz Bessel beam. The high resolution inspection apparatus comprises a terahertz wave generating unit for generating a terahertz wave; a Bessel beam forming unit for forming a terahertz Bessel beam at an inspection target object using a terahertz wave incident from the terahertz wave generating unit; a first lens for changing an angle of the terahertz wave radiated, when the terahertz Bessel beam is transmitted through the inspection target object, to be smaller; a second lens for concentrating the terahertz wave passing through the first lens and toward a detection unit; and a terahertz wave detection unit for detecting the terahertz wave concentrated by the second lens.
    Type: Application
    Filed: February 25, 2020
    Publication date: June 18, 2020
    Inventors: Gyeong-Sik OK, Sung-Wook CHOI, Hyun-Joo CHANG
  • Patent number: 10648864
    Abstract: According to one embodiment of the present invention, a terahertz wave concentrating module can comprise: a first lens for changing a terahertz wave, which is emitted while a terahertz Bessel beam penetrates an object to be inspected, so as to have a small angle; and a second lens for concentrating, on a detector, the terahertz wave having passed through the first lens.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: May 12, 2020
    Assignee: KOREA FOOD RESEARCH INSTITUTE
    Inventors: Gyeong-Sik Ok, Sung-Wook Choi, Hyun-Joo Chang
  • Publication number: 20190250037
    Abstract: According to one embodiment of the present invention, a terahertz wave concentrating module can comprise: a first lens for changing a terahertz wave, which is emitted while a terahertz Bessel beam penetrates an object to be inspected, so as to have a small angle; and a second lens for concentrating, on a detector, the terahertz wave having passed through the first lens.
    Type: Application
    Filed: November 23, 2016
    Publication date: August 15, 2019
    Inventors: Gyeong-Sik OK, Sung-Wook CHOI, Hyun-Joo CHANG
  • Patent number: 10262175
    Abstract: A wrapper for a terahertz wave according to an embodiment of the present invention includes: a terahertz wave transmission layer that is made of a material that transmits a terahertz wave; and an electric field enhancement structure that enhances an electric field by reacting with a predetermined frequency band of terahertz waves passing through the terahertz wave transmission layer. An optical identification device for a terahertz wave according to an embodiment of the present invention includes m identification units composed of: a terahertz wave transmission layer that is made of a material that transmits a terahertz wave; and a waveguide grating that resonates at a natural resonant frequency when receiving the transmitted terahertz wave, in which the natural resonant frequency is any one of a first natural resonant frequency to an n-th natural resonant frequency.
    Type: Grant
    Filed: March 9, 2016
    Date of Patent: April 16, 2019
    Assignee: KOREA FOOD RESEARCH INSTITUTE
    Inventors: Sung Wook Choi, Hyun Jung Kim, Na Ri Lee, Hyun Joo Chang, Gyeong Sik Ok
  • Publication number: 20180143131
    Abstract: A package damage inspection device according to an exemplary embodiment of the present invention may include: a sensor recognizing internal environmental change information of a sealed container; an identification element including an identification code of the sealed container; a recognizing unit recognizing the identification code included in the identification element to recognize identification information of the sealed container; and a determining unit comparing the internal environmental change information recognized by the sensor and reference change information with each other to determine whether or not the sealed container is maintained in a sealed state.
    Type: Application
    Filed: June 7, 2016
    Publication date: May 24, 2018
    Inventors: Sung-Wook CHOI, Na-Ri LEE, Hyun-Joo CHANG, Gyeong-Sik OK, Ki-Sang PARK
  • Publication number: 20180059409
    Abstract: A polygon mirror assembly includes: a body including a coupled unit coupled to a shaft that is rotated; a plurality of first frames extended in a direction distant from the coupled unit; a plurality of reflection surfaces disposed between the first frames to form a polygon and rotatably coupled to the first frames; and driving units tilting the reflection surfaces.
    Type: Application
    Filed: August 30, 2016
    Publication date: March 1, 2018
    Applicant: KOREA FOOD RESEARCH INSTITUTE
    Inventors: Sung Wook CHOI, Min Ah WOO, Na Ri LEE, Hyun Joo CHANG, Gyeong Sik OK
  • Patent number: 9898636
    Abstract: A wrapper for a terahertz wave according to an embodiment of the present invention includes: a terahertz wave transmission layer that is made of a material that transmits a terahertz wave; and an electric field enhancement structure that enhances an electric field by reacting with a predetermined frequency band of terahertz waves passing through the terahertz wave transmission layer. An optical identification device for a terahertz wave according to an embodiment of the present invention includes m identification units composed of: a terahertz wave transmission layer that is made of a material that transmits a terahertz wave; and a waveguide grating that resonates at a natural resonant frequency when receiving the transmitted terahertz wave, in which the natural resonant frequency is any one of a first natural resonant frequency to an n-th natural resonant frequency.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: February 20, 2018
    Assignee: KOREA FOOD RESEARCH INSTITUTE
    Inventors: Sung Wook Choi, Hyun Jung Kim, Na Ri Lee, Hyun Joo Chang, Gyeong Sik Ok
  • Patent number: 9752926
    Abstract: A scanning module including first path shifting unit changing a path of an incident electromagnetic wave from a light source; a first driving unit adjusting the path of the electromagnetic wave by moving the first path shifting unit; and a Bessel beam generating unit making a Bessel beam on a portion of an object, using the electromagnetic wave with the path changed by the path shifting unit. A detection probe which includes a light source generating an electromagnetic wave; a path shifting unit changing a path of an electromagnetic wave from a light source; a Bessel beam generating unit making a Bessel beam on a portion of an object, using the electromagnetic wave with the path changed by the path shifting unit; a detecting unit detecting intensity of a wave from the object, and a housing accommodating the light source, path shifting unit, Bessel beam generating unit, and detecting unit.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: September 5, 2017
    Assignee: Korea Food Research Institute
    Inventors: Sung Wook Choi, Hyun Jung Kim, Na Ri Lee, Hyun Joo Chang, Gyeong Sik Ok
  • Publication number: 20160259959
    Abstract: A wrapper for a terahertz wave according to an embodiment of the present invention includes: a terahertz wave transmission layer that is made of a material that transmits a terahertz wave; and an electric field enhancement structure that enhances an electric field by reacting with a predetermined frequency band of terahertz waves passing through the terahertz wave transmission layer. An optical identification device for a terahertz wave according to an embodiment of the present invention includes m identification units composed of: a terahertz wave transmission layer that is made of a material that transmits a terahertz wave; and a waveguide grating that resonates at a natural resonant frequency when receiving the transmitted terahertz wave, in which the natural resonant frequency is any one of a first natural resonant frequency to an n-th natural resonant frequency.
    Type: Application
    Filed: March 9, 2016
    Publication date: September 8, 2016
    Applicant: KOREA FOOD RESEARCH INSTITUTE
    Inventors: Sung Wook CHOI, Hyun Jung KIM, Na Ri LEE, Hyun Joo CHANG, Gyeong Sik OK
  • Publication number: 20160167861
    Abstract: A wrapper for a terahertz wave according to an embodiment of the present invention includes: a terahertz wave transmission layer that is made of a material that transmits a terahertz wave; and an electric field enhancement structure that enhances an electric field by reacting with a predetermined frequency band of terahertz waves passing through the terahertz wave transmission layer. An optical identification device for a terahertz wave according to an embodiment of the present invention includes m identification units composed of: a terahertz wave transmission layer that is made of a material that transmits a terahertz wave; and a waveguide grating that resonates at a natural resonant frequency when receiving the transmitted terahertz wave, in which the natural resonant frequency is any one of a first natural resonant frequency to an n-th natural resonant frequency.
    Type: Application
    Filed: November 6, 2013
    Publication date: June 16, 2016
    Applicant: KOREA FOOD RESEARCH INSTITUTE
    Inventors: Sung Wook CHOI, Hyun Jung KIM, Na Ri LEE, Hyun Joo CHANG, Gyeong Sik OK
  • Patent number: 9346054
    Abstract: Disclosed is a non-contact heating type gene amplification system. The non-contact heating type gene amplification system includes separate light sources for each step of a polymerase chain reaction in order to perform a high-speed temperature cycle by moving a rotation unit, in which a plurality of sample chambers are formed, to places at which the sample chambers are controlled at the temperatures corresponding to each step.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: May 24, 2016
    Assignee: KOREA FOOD RESEARCH INSTITUTE
    Inventors: Hyang Sook Chun, Sung Wook Choi, Na Ri Lee, Hyun Joo Chang
  • Publication number: 20160084701
    Abstract: A scanning module including first path shifting unit changing a path of an incident electromagnetic wave from a light source; a first driving unit adjusting the path of the electromagnetic wave by moving the first path shifting unit; and a Bessel beam generating unit making a Bessel beam on a portion of an object, using the electromagnetic wave with the path changed by the path shifting unit. A detection probe which includes a light source generating an electromagnetic wave; a path shifting unit changing a path of an electromagnetic wave from a light source; a Bessel beam generating unit making a Bessel beam on a portion of an object, using the electromagnetic wave with the path changed by the path shifting unit; a detecting unit detecting intensity of a wave from the object, and a housing accommodating the light source, path shifting unit, Bessel beam generating unit, and detecting unit.
    Type: Application
    Filed: December 18, 2013
    Publication date: March 24, 2016
    Inventors: Sung Wook CHOI, Hyun Jung KIM, Na Ri LEE, Hyun Joo CHANG, Gyeong Sik OK
  • Patent number: 9239287
    Abstract: An object inspection apparatus includes a terahertz wave supplying unit for generating a terahertz wave and moving a path of the terahertz wave according to time so that the terahertz wave is supplied to an object to be inspected, a focusing lens located between the terahertz wave supplying unit and the object to be inspected to focus the terahertz wave supplied by the terahertz wave supplying unit, a rotating plate having a plate shape and including a plurality of the focusing lenses with different distances from the center thereof, the rotating plate rotating in the circumferential direction so that one of the focusing lenses is located at a path of the terahertz wave according to the path movement of the terahertz wave, and a terahertz wave detecting unit for collecting and detecting a terahertz wave incident to the object to be inspected.
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: January 19, 2016
    Assignee: KOREA FOOD RESEARCH INSTITUTE
    Inventors: Hyang-Sook Chun, Sung-Wook Choi, Hyun-Joo Chang, Na-Ri Lee, Gyeong-Sik Ok