Patents by Inventor Wook Cha

Wook Cha 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: 20250157760
    Abstract: The present disclosure discloses an arc chute in which firing from the outside can be blocked and a load break switch including the same, the arc chute including: an arc grid part; two side cover parts spaced apart from each other and overlapping in one direction, and respectively coupled to both sides of the arc grid part; and a top cover part that is disposed between the two side cover parts and coupled to each of the two side cover parts, and is formed in a plate shape extending across both ends of the two side cover parts.
    Type: Application
    Filed: February 2, 2023
    Publication date: May 15, 2025
    Inventor: Sang Wook CHA
  • Publication number: 20250140868
    Abstract: A current collector for rechargeable lithium batteries and a rechargeable lithium battery including the same are disclosed. The current collector includes: a polymer support layer; a conductive layer on at least one surface of the polymer support layer; and a carbon-containing layer on at least one surface of the polymer support layer, and the carbon-containing layer includes at least one of carbon nanotubes or carbon nanofibers extending from the polymer support layer or the conductive layer.
    Type: Application
    Filed: October 29, 2024
    Publication date: May 1, 2025
    Inventors: Da Young KANG, Su Hyun KIM, Kyu Seo LEE, Jung Wook CHA, Jung Min LEE, Jung Hyun NAM
  • Patent number: 12284914
    Abstract: Disclosed herein are a compound represented by Chemical Formula A or Chemical Formula B and an organic light-emitting diode comprising the same.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: April 22, 2025
    Assignee: SFC CO., LTD.
    Inventors: Soon-Wook Cha, Yoona Shin, Jea-Geon Lim, Sang-Woo Park, Ji-Hwan Kim, Jung-Ho Yoo, Young-Hwan Park
  • Patent number: 12281650
    Abstract: Disclosed is an oil pump including: a pump module provided with a rotary shaft, an inner rotor coupling with the rotary shaft, an outer rotor rotated engaging with the inner rotor, an inlet for sucking fluid, and an outlet for pressing and discharging the sucked fluid; housings supporting the pump module; and a direction switching unit coupled between the housings and the outer rotor to keep an eccentric distance between the rotary shaft or a central axis line of the inner rotor and a central axis line of the outer rotor. According to the disclosure, there is provided an oil pump used for both forward rotation and reverse rotation, which does not require changing a suction area and a discharge area and direction switching is stably performed even when a power source rotates forwardly and reversely.
    Type: Grant
    Filed: August 5, 2022
    Date of Patent: April 22, 2025
    Assignee: YOUNGSHIN PRECISION CO., LTD
    Inventors: Do Jae Joo, Seong Wook Cha, Gahyeon Yi, Hui Do Ryu
  • Publication number: 20250109116
    Abstract: An object of the present invention is to provide an organic compound having excellent characteristics such as excellent hole injection and transport abilities, electron blocking ability, and high thin-film stability as material for an organic electroluminescence device having high efficiency and high durability, and also to provide an organic electroluminescence device using the compound and having high efficiency and high durability.
    Type: Application
    Filed: November 24, 2022
    Publication date: April 3, 2025
    Applicant: Hodogaya Chemical Co., Ltd.
    Inventors: Kouki Kase, Jae-Geon Lim, Heung-Seob Shin, Hyun-Wook Cha, Junichi Izumida, Shuichi Hayashi
  • Publication number: 20240352933
    Abstract: Disclosed is an oil pump including: a pump module provided with a rotary shaft, an inner rotor coupling with the rotary shaft, an outer rotor rotated engaging with the inner rotor, an inlet for sucking fluid, and an outlet for pressing and discharging the sucked fluid; housings supporting the pump module; and a direction switching unit coupled between the housings and the outer rotor to keep an eccentric distance between the rotary shaft or a central axis line of the inner rotor and a central axis line of the outer rotor. According to the disclosure, there is provided an oil pump used for both forward rotation and reverse rotation, which does not require changing a suction area and a discharge area and direction switching is stably performed even when a power source rotates forwardly and reversely.
    Type: Application
    Filed: August 5, 2022
    Publication date: October 24, 2024
    Applicant: YOUNGSHIN PRECISION CO., LTD
    Inventors: DO JAE JOO, SEONG WOOK CHA, GAHYEON YI, HUI DO RYU
  • Patent number: 12114562
    Abstract: Disclosed herein are an anthracene derivative represented by [Chemical Formula A] and an organic light-emitting diode comprising same. In [Chemical Formula A], the substituents R1 to R5, R, R11 to R18, L1, and n are as defined in the description.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: October 8, 2024
    Assignee: SFC CO., LTD.
    Inventors: Soon-Wook Cha, Yoona Shin, Jung-Ho Yoo, Sung Woo Kim, Jiwon Lee, Seok-Bae Park, Hee-Dae Kim, Yu-Rim Lee, Dong Myung Park, Seongeun Woo
  • Publication number: 20240260468
    Abstract: An organic electroluminescent device including a first electrode, a second electrode, and an organic layer formed between the first electrode and the second electrode. The organic layer includes a light emitting layer formed using a solution containing an organic electroluminescent material and a solvent. The organic electroluminescent material includes a host and a dopant, and the host is one or more compounds represented by [Formula A] below.
    Type: Application
    Filed: December 19, 2023
    Publication date: August 1, 2024
    Inventors: Soon Wook Cha, Ji Won Lee, Tae Jung Yu, Yong Woon Yang
  • Publication number: 20240237383
    Abstract: An organic electroluminescent device including a first electrode, a second electrode, and an organic layer formed between the first electrode and the second electrode. The organic layer includes a light emitting layer formed using a solution containing an organic electroluminescent material and a solvent. The organic electroluminescent material includes a host and a dopant, and the host is one or more compounds represented by [Formula A] below.
    Type: Application
    Filed: December 19, 2023
    Publication date: July 11, 2024
    Inventors: Soon Wook Cha, Ji Won Lee, Tae Jung Yu, Yong Woon Yang
  • Publication number: 20240237384
    Abstract: An organic electroluminescent device including a first electrode, a second electrode, and an organic layer formed between the first electrode and the second electrode. The organic layer includes a light emitting layer formed using a solution containing an organic electroluminescent material and a solvent. The organic electroluminescent material includes a host and a dopant, and the host is one or more compounds represented by [Formula A] below.
    Type: Application
    Filed: December 19, 2023
    Publication date: July 11, 2024
    Inventors: Soon Wook Cha, Ji Won Lee, Tae Jung Yu, Yong Woon Yang
  • Patent number: 12010915
    Abstract: The present disclosure relates to an organic light-emitting diode and, more particularly, to an organic-light-emitting diode comprising: a first electrode; a second electrode facing the first electrode; and a light-emitting layer intercalated between the first electrode and the second electrode, wherein the light-emitting layer comprises at least one of the amine compounds represented by the following Chemical Formula A and at least one of the anthracene compounds represented by the following Chemical Formula B or C. The structures of Chemical Formulas A to C are the same as in the specification.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: June 11, 2024
    Assignee: SFC CO., LTD.
    Inventors: Soon-Wook Cha, Sang-Woo Park, Jung-Ho Yoo, Ji-Hwan Kim, Sung Woo Kim, Hyeon Jun Jo, Young-Hwan Park
  • Publication number: 20240114772
    Abstract: An organic electroluminescent device according to the present invention is an organic electroluminescent device comprising a first electrode, a second electrode, and an organic material layer formed between the first electrode and the second electrode, wherein the organic material layer is formed using a composition having an organic electroluminescence material and a solvent, the organic electroluminescence material has a host, and the organic electroluminescence device has excellent operation properties such as luminous efficiency and driving voltage by using an organic electroluminescence material having high solubility in a solvent.
    Type: Application
    Filed: January 28, 2022
    Publication date: April 4, 2024
    Inventors: Soon Wook Cha, Ji Won Lee
  • Publication number: 20240114771
    Abstract: An organic electroluminescent device according to the present invention is an organic electroluminescent device comprising a first electrode, a second electrode, and an organic material layer formed between the first electrode and the second electrode, wherein the organic material layer is formed using a composition having an organic electroluminescence material and a solvent, the organic electroluminescence material has a host, and the organic electroluminescence device has excellent operation properties such as luminous efficiency and driving voltage by using an organic electroluminescence material having high solubility in a solvent.
    Type: Application
    Filed: January 28, 2022
    Publication date: April 4, 2024
    Inventors: Soon Wook Cha, Ji Won Lee
  • Publication number: 20240032321
    Abstract: The present invention relates to an organic electroluminescent element (organic EL element) including at least an anode, a first hole transport layer, a second hole transport layer, a blue light-emitting layer, an electron transport layer, and a cathode in this order, in which the second hole transport layer contains an arylamine compound represented by the following general formula (1).
    Type: Application
    Filed: October 29, 2021
    Publication date: January 25, 2024
    Applicants: HODOGAYA CHEMICAL CO., LTD., SFC CO., LTD.
    Inventors: Kazuyuki SURUGA, Sang-Won KO, Bong-Hyang LEE, Jung-Ho RYU, Takeshi YAMAMOTO, Junichi IZUMIDA, Soon-Wook CHA, Sung-Hoon JOO, Byung-Sun YANG, Ji-Hwan KIM, Bong-Ki SHIN
  • Publication number: 20230345817
    Abstract: An object is to provide a material for an organic EL device having excellent hole injection and transport performance, electron blocking ability, stability in a thin film state, and durability, and further to provide an organic EL device having high efficiency, a low driving voltage, and a long lifetime by combining the material with various materials for an organic EL device having excellent hole and electron injection and transport performance, electron blocking ability, stability in a thin film state, and durability in such a manner that the characteristics of each of the materials can be effectively exhibited. An organic EL device was fabricated by focusing on the fact that a triarylamine compound having a specific structure has excellent hole injection and transport ability, thin film stability, and durability, and selecting a specific arylamine compound as a material for forming a second hole transport layer, and the invention was completed.
    Type: Application
    Filed: August 13, 2021
    Publication date: October 26, 2023
    Applicants: HODOGAYA CHEMICAL CO., LTD., SFC CO., LTD.
    Inventors: Junichi IZUMIDA, Sang-Won KO, Bong-Hyang LEE, Jung-Ho RYU, Takeshi YAMAMOTO, Kazuyuki SURUGA, Soon-Wook CHA, Sung-Hoon JOO, Byung-Sun YANG, Ji-Hwan KIM
  • Publication number: 20230276706
    Abstract: Disclosed herein are pyrene heterocyclic compounds useful for an organic light-emitting diode and an organic light-emitting diode including same. More specifically, compound represented by [Chemical Formula A] or [Chemical Formula B] and an organic light-emitting diode are provided. [Chemical Formula A] and [Chemical Formula B] are as defined in the Description.
    Type: Application
    Filed: July 20, 2021
    Publication date: August 31, 2023
    Inventors: Soon-wook CHA, Sung-woo KIM, Ji-won LEE, 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
  • Patent number: 11723265
    Abstract: Disclosed herein is an organic light emitting diode, comprising: a first electrode; a second electrode facing the first electrode; and a light emitting layer interposed between the first electrode and the second electrode, wherein the light-emitting layer contains at least one of the anthracene derivatives represented by the following Chemical Formula A and having an orbital energy level of TTA phenomenon-based singlet generation in which the second triplet excited orbital energy level (T2) is higher than two times the lowest triplet excited orbital energy level (T1) (T2>2T1).
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: August 8, 2023
    Assignee: SFC CO., LTD.
    Inventors: Young-Hwan Park, Soon-Wook Cha, Yoona Shin, Sungeun Choi
  • Publication number: 20230247850
    Abstract: An objective of the present invention is to provide an organic EL device having high efficiency, low driving voltage and long lifetime by using a material for organic EL devices offering excellent hole injectability and transportability, electron blockability, stability in a thin-film state, and durability, and also by employing, in combination, the aforementioned material and various other materials for organic EL devices offering excellent hole/electron injectability and transportability, electron blockability, stability in a thin-film state, and durability, in a manner that the properties of each material can be brought out effectively. The present invention relates to an organic electroluminescence device having, between an anode and a cathode, at least a hole transport layer, a light-emitting layer, and an electron transport layer in this order from the anode side, wherein the hole transport layer contains a triarylamine compound having a specific structure.
    Type: Application
    Filed: August 2, 2021
    Publication date: August 3, 2023
    Applicants: HODOGAYA CHEMICAL CO., LTD., SFC CO., LTD.
    Inventors: Yuta HIRAYAMA, Takeshi YAMAMOTO, Kouki KASE, Shuichi HAYASHI, Soon-Wook CHA, Sung-Hoon JOO, Byung-Sun YANG, Ji-Hwan KIM
  • Patent number: 11683980
    Abstract: The present invention relates to a condensed fluorene derivative comprising a hetero ring, and, more specifically, relates to an intermediate for producing a hetero-ring compound able to exhibit the outstanding element characteristic of a long life and outstanding luminance and light-emission efficiency when used as an organic light-emitting material.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: June 20, 2023
    Assignee: SFC CO., LTD.
    Inventors: Soon-Wook Cha, Ju-man Song, Yu-rim Lee, Sang-Woo Park, Hee-Dae Kim, Seok-Bae Park
  • Publication number: 20230180598
    Abstract: An objective of the present invention is to provide a material for organic EL devices offering excellent hole injectability and transportability, electron blockability, stability in a thin-film state, and durability, and also to provide an organic EL device having high efficiency, low driving voltage and long lifetime by employing, in combination, the aforementioned material and various materials for organic EL devices offering excellent hole/electron injectability and transportability, electron blockability, stability in a thin-film state, and durability, in a manner that the properties of each of the materials can be brought out effectively. The present invention relates to an organic EL device containing a specific arylamine compound as a material constituting a second hole transport layer, wherein the difference between the HOMO level of the second hole transport layer and the HOMO level of a first hole transport layer is 0.15 eV or less.
    Type: Application
    Filed: June 16, 2021
    Publication date: June 8, 2023
    Applicants: HODOGAYA CHEMICAL CO., LTD., SFC CO., LTD.
    Inventors: Yuta HIRAYAMA, Takeshi YAMAMOTO, Kouki KASE, Kazuyuki SURUGA, Shuichi HAYASHI, Soon-Wook CHA, Sung-Hoon JOO, Byung-Sun YANG, Ji-Hwan KIM