Patents by Inventor Ji-hyeon Choi

Ji-hyeon 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).

  • Publication number: 20240164206
    Abstract: The present invention relates to: a pyrene derivative compound having a specific structure; and a high efficiency organic light-emitting device employing the pyrene derivative compound in a light emitting layer and thus having excellent light-emitting characteristics. The organic light-emitting device according to the present invention can be configured as a high efficiency organic light-emitting device having excellent light-emitting characteristics by employing the pyrene derivative compound having the specific structure as a host in the light emitting layer, and thus can be usefully applied industrially in lighting devices, as well as various display devices such as flat, flexible, and wearable displays.
    Type: Application
    Filed: February 15, 2022
    Publication date: May 16, 2024
    Inventors: Se-jin LEE, Si-in KIM, Seok-bae PARK, Hee-dae KIM, Yeong-tae CHOI, Seung-soo LEE, Ji-yung KIM, Kyeong-hyeon KIM, Kyung-tae KIM, Myeong-jun KIM, Tae-gyun LEE, Joon-ho KIM
  • Publication number: 20240155938
    Abstract: An organic light-emitting device according to the present invention uses a pyrene derivative compound having a characteristic structure as a host in a light-emitting layer to realize a long-lifespan and high-efficiency organic light-emitting device having excellent light-emitting characteristics in terms of lifespan and luminescence efficiency. Accordingly, the organic light-emitting device can be usefully applied, in the industrial aspect, for various display devices such as flat panel, flexible, and wearable displays, as well as lighting devices.
    Type: Application
    Filed: February 15, 2022
    Publication date: May 9, 2024
    Inventors: Se-jin LEE, Si-in KIM, Seok-bae PARK, Hee-dae KIM, Yeong-tae CHOI, Seung-soo LEE, Ji-yung KIM, Kyeong-hyeon KIM, Kyung-tae KIM, Myeong-jun KIM, Tae-gyun LEE, Joon-ho KIM
  • Publication number: 20240147854
    Abstract: The present disclosure relates to a boron compound useful in an organic light-emitting diode and an organic light-emitting diode comprising same and, more particularly, to a boron compound represented by any one of [Chemical Formula A], wherein [Chemical Formula A] is as defined in the description.
    Type: Application
    Filed: March 19, 2021
    Publication date: May 2, 2024
    Inventors: Yeong-Tae CHOI, Se-Jin Lee, Ji-Yung KIM, Kyungtae KIM, Myeong-Jun Kim, Kyeong-Hyeon Kim
  • Patent number: 11932993
    Abstract: A paper coating composition, methods for making the same, and a coated paper. The paper coating composition comprises a solvent, an ethylene-(meth)acrylic acid copolymer, a basic compound, and a polycarbodiimide-based curing agent, wherein the polycarbodiimide-based curing agent has a carbodiimide group equivalent of about 150 to about 350. The coating of the coated paper likewise comprises an ethylene-(meth)acrylic acid copolymer crosslinked by N-acylurea groups.
    Type: Grant
    Filed: May 26, 2023
    Date of Patent: March 19, 2024
    Assignees: SK Innovation Co., Ltd., SK Geo Centric Co., Ltd.
    Inventors: Dong Hyun Woo, Sang Ha Son, Ji Hyeon Choi, Bu Yeon Hwang
  • Publication number: 20240090318
    Abstract: The present invention relates to a novel heterocyclic compound usable in an organic light-emitting device and to an organic light-emitting device comprising same, wherein [chemical formula A] is as described in the detailed description of the invention.
    Type: Application
    Filed: December 28, 2021
    Publication date: March 14, 2024
    Inventors: Se-Jin LEE, Seok-Bae PARK, Si-In KIM, Hee-Dae KIM, Yeong-Tae CHOI, Ji-Yung KIM, Kyung-Tae KIM, Myeong-Jun KIM, Kyeong-hyeon KIM, Seung-soo LEE, Tae Gyun LEE, Joon-Ho KIM
  • Publication number: 20240075318
    Abstract: The present disclosure relates to a method for carrying out dose delivery quality assurance for high-precision radiation treatment, in which parameters affecting a pass rate of dose delivery quality assurance can be derived through regression analysis, which is a known statistical analysis method, and a pass rate prediction model capable of predicting each parameter and the pass rate of dose delivery quality assurance can be derived, and accordingly, it can be predicted in advance whether dose delivery quality assurance will be passed according to the parameters through the above prediction model, without repeatedly carrying out dose delivery quality assurance according to a patient's treatment plan, and as a result, the efficiency of dose delivery quality assurance can be enhanced, and the time or capacity required for such quality assurance is reduced, such that radiation treatment for an actual patient can be quickly and precisely carried out.
    Type: Application
    Filed: December 22, 2021
    Publication date: March 7, 2024
    Inventors: Young Nam KANG, Ji Na KIM, Hong Seok JANG, Byung Ock CHOI, Yun Ji SEOL, Tae Geon OH, Na Young AN, Jae Hyeon LEE, Kyu Min HAN, Ye Rim SHIN
  • Patent number: 11925110
    Abstract: Disclosed is a polycyclic aromatic compound that can be employed in an organic layer of an organic electroluminescent device. Also disclosed is a highly efficient organic electroluminescent device including the polycyclic aromatic compound. The use of the polycyclic aromatic compound significantly improves the luminous efficiency of the device.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: March 5, 2024
    Assignee: SFC CO., LTD.
    Inventors: Kyeong-hyeon Kim, Se-jin Lee, Yeong-tae Choi, Ji-yung Kim, Kyung-tae Kim, Myeong-jun Kim
  • Publication number: 20230189650
    Abstract: Provided is a preparation method for a thermoelectric composite. The preparation method for a thermoelectric composite comprises the steps of: preparing a base substrate containing a first binary metal oxide; and providing a metal precursor and a reaction material containing oxygen (O) onto the base substrate to form a material film containing a second biliary metal oxide resulting from the reaction of the metal precursor and the reaction material, wherein in the step of forming the material film, a 2-dimensional electron gas is generated between the base substrate and the material film as the material film is formed on the base substrate.
    Type: Application
    Filed: February 2, 2023
    Publication date: June 15, 2023
    Applicants: Industry-University Cooperation Foundation Hanyang University Erica Campus, Ajou University Industry-Academic Cooperation Foundation
    Inventors: Tae Joo Park, Sang Woon Lee, Dae Woong Kim, Tae Jun Seok, Jae Hyun Yoon, Ji Hyeon Choi
  • Publication number: 20230101276
    Abstract: Provided is an electronic device including a first lower material film, a first upper material film on the first lower material film, a first two-dimensional electron gas between the first lower material film and the first upper material film, a second lower material film on the first upper material film, a second upper material film on the second lower material film, a second two-dimensional electron gas between the second lower material film and the second upper material film, a source electrode on the second upper material film, a drain electrode on the second upper material film, a gate insulating film on the second upper material film, and a gate electrode on the gate insulating film.
    Type: Application
    Filed: September 26, 2022
    Publication date: March 30, 2023
    Applicants: INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY ERICA CAMPUS, AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION
    Inventors: Tae Joo PARK, Sang Woon LEE, Tae Jun SEOK, Ji Hyeon CHOI
  • Publication number: 20230097366
    Abstract: Provided is an electronic device including a lower material film, an upper material film on the lower material film, a two-dimensional electron gas between the lower material film and the upper material film, a source electrode on the upper material film, a drain electrode on the upper material film, and a gate electrode on the upper material film, wherein the upper material film includes a first portion in contact with the source electrode, a second portion in contact with the gate electrode, and a third portion in contact with the drain electrode, wherein a thickness of the second portion of the upper material film is greater than a thickness of the first portion of the upper material film and a thickness of the third portion of the upper material film, wherein the voltage drop and the threshold voltage are adjusted by adjusting the thicknesses of the first to third portions of the upper material film.
    Type: Application
    Filed: September 26, 2022
    Publication date: March 30, 2023
    Applicants: INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY ERICA CAMPUS, AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION
    Inventors: Tae Joo PARK, Sang Woon LEE, Tae Jun SEOK, Ji Hyeon CHOI
  • Patent number: 10237876
    Abstract: Embodiments of the present disclosure provide terminal connection control method and apparatus in a base station of a mobile communication system which supports a Carrier Aggregation (CA) function.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: March 19, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nam-Ryul Jeon, Ki-Back Kim, Han-Seok Kim, Hyun-Ho Im, Ji-Hyeon Choi
  • Patent number: 9831543
    Abstract: An adaptable antenna apparatus for a base station is provided. The adaptable antenna apparatus includes a first antenna having a first antenna array, a second antenna rotatably coupled to the first antenna and having a second antenna array, and a main controller provided in one of the first antenna and the second antenna, wherein the main controller is configured to apply a control signal to the first antenna and the second antenna.
    Type: Grant
    Filed: February 3, 2015
    Date of Patent: November 28, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji-Hyeon Choi, Han-Seok Kim, Kyu-II Yeon, Byung-Tae Yoon, Jun-Sung Lee, Nam-Ryul Jeon
  • Publication number: 20170137164
    Abstract: A disposable paper container comprises a bottom part and a side part erectly extending from the bottom part, and together with the bottom part, forming a space for accommodating or storing an object. The side part includes a first sub-side part, a second sub-side part, a third sub-side part facing the first sub-side part, a fourth sub-side part facing the second sub-side part, a first connecting sub-side part connecting the first sub-side part with the second sub-side part, a second connecting sub-side part connecting the second sub-side part with the third sub-side part, a third connecting sub-side part connecting the third sub-side part with the fourth sub-side part, and a fourth connecting sub-side part connecting the fourth sub-side part with the first sub-side part, wherein the bottom part and the side part are formed of a piece of paper.
    Type: Application
    Filed: November 14, 2016
    Publication date: May 18, 2017
    Inventor: Ji Hyeon CHOI
  • Patent number: 9565617
    Abstract: A method and apparatus for configuring a routing path in a wireless communication system are provided. The method includes measuring a first distance between the terminal and a target terminal, transmitting information of the measured first distance to at least one neighboring terminal, receiving a second distance measured for the target terminal with respect to the terminal from the at least one neighboring terminal, and determining a neighboring terminal of which the second distance is the longest as a next terminal of the routing path.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: February 7, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji-Hyeon Choi, Kyu-II Yeon, Han-Seok Kim, Jun-Sung Lee
  • Publication number: 20160323889
    Abstract: Embodiments of the present disclosure provide terminal connection control method and apparatus in a base station of a mobile communication system which supports a Carrier Aggregation (CA) function.
    Type: Application
    Filed: December 19, 2014
    Publication date: November 3, 2016
    Inventors: Nam-Ryul JEON, Ki-Back KIM, Han-Seok KIM, Hyun-Ho IM, Ji-Hyeon CHOI
  • Patent number: 9148340
    Abstract: An apparatus and a method for configuring a network in a terminal of a wireless communication system are provided. The network configuring method includes sending a reference message in a communication radius of the terminal; when receiving at least one ACKnowledge (ACK) message for the reference message, checking a node degree of each adjacent terminal which sends the ACK message, the node degree indicating the number of neighboring terminals of each adjacent terminal; forming an inner region and an outer region of the terminal based on an adjacent terminal of the greatest node degree among the adjacent terminals; determining a transmit power in the inner region and a transmit power in the outer region; and determining a final transmit power for configuring a network using the transmit power of the inner region and the transmit power of the outer region.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: September 29, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji-Hyeon Choi, Sun-Wook Kim, Seong-Yong Park, Jun-Sung Lee
  • Publication number: 20150222013
    Abstract: An adaptable antenna apparatus for a base station is provided. The adaptable antenna apparatus includes a first antenna having a first antenna array, a second antenna rotatably coupled to the first antenna and having a second antenna array, and a main controller provided in one of the first antenna and the second antenna, wherein the main controller is configured to apply a control signal to the first antenna and the second antenna.
    Type: Application
    Filed: February 3, 2015
    Publication date: August 6, 2015
    Inventors: Ji-Hyeon CHOI, Han-Seok KIM, Kyu-Il YEON, Byung-Tae YOON, Jun-Sung LEE, Nam-Ryul JEON
  • Patent number: 8986087
    Abstract: A structure is provided for protecting a Radio Frequency Remote Head (RRH). The structure includes a solar head and a solar body. An upper side of the solar head is sloped to prevent an inflow of rainwater and has at least one solar panel, and a lower side thereof has at least one round cable hole surrounded by a rubber material. The solar body is situated on a lower end of the solar head and includes a plurality of solar panels, a side of each of which is sloped to prevent an inflow of rainwater and is openable upward. An upper end of the solar body has an air outlet formed to exhaust air, and a lower end thereof has an air inlet formed to receive air. The air outlet and the air inlet each have a plurality of supports arranged at specific intervals and connected by a protection net.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: March 24, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ji-Hyeon Choi, Seong-Yong Park, Han-Seok Kim, Jun-Sung Lee
  • Publication number: 20140133311
    Abstract: A method and apparatus for configuring a routing path in a wireless communication system are provided. The method includes measuring a first distance between the terminal and a target terminal, transmitting information of the measured first distance to at least one neighboring terminal, receiving a second distance measured for the target terminal with respect to the terminal from the at least one neighboring terminal, and determining a neighboring terminal of which the second distance is the longest as a next terminal of the routing path.
    Type: Application
    Filed: November 5, 2013
    Publication date: May 15, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Ji-Hyeon CHOI, Kyu-Il YEON, Han-Seok KIM, Jun-Sung LEE
  • Publication number: 20130250814
    Abstract: An apparatus and a method for configuring a network in a terminal of a wireless communication system are provided. The network configuring method includes sending a reference message in a communication radius of the terminal; when receiving at least one ACKnowledge (ACK) message for the reference message, checking a node degree of each adjacent terminal which sends the ACK message, the node degree indicating the number of neighboring terminals of each adjacent terminal; forming an inner region and an outer region of the terminal based on an adjacent terminal of the greatest node degree among the adjacent terminals; determining a transmit power in the inner region and a transmit power in the outer region; and determining a final transmit power for configuring a network using the transmit power of the inner region and the transmit power of the outer region.
    Type: Application
    Filed: November 30, 2011
    Publication date: September 26, 2013
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ji-Hyeon Choi, Sun-Wook Kim, Seong-Yong Park, Jun-Sung Lee