Patents by Inventor Yeongtae CHOI

Yeongtae 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: 11476426
    Abstract: Disclosed is an organic light emitting device including a first electrode, a second electrode opposite to the first electrode, and at least one organic layer interposed between the first and second electrodes. The organic layer includes first and second compounds represented by Formulae A and B, respectively: The organic light emitting device exhibits low driving voltage, high efficiency, and long life. Due to these advantages, the organic light emitting device is useful in a variety of industrial applications, including displays and lighting systems.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: October 18, 2022
    Assignee: SFC CO., LTD.
    Inventors: Se-jin Lee, Taejung Yu, Seok-bae Park, Byung-sun Yang, Su-Jin Lee, Bong-Hyang Lee, Yeongtae Choi
  • Publication number: 20210376241
    Abstract: Disclosed are amine-substituted naphthalene derivatives and organic light emitting diodes including the same. In the organic light emitting diodes, at least one of the amine-substituted naphthalene derivatives is employed in a hole auxiliary layer interposed between a hole transport layer and a light emitting layer to enable efficient hole transport to the light emitting layer, achieving high luminous efficiency and long lifetime.
    Type: Application
    Filed: August 11, 2021
    Publication date: December 2, 2021
    Applicant: SFC CO., LTD.
    Inventors: Se-jin LEE, Bong-Hyang LEE, Taejung YU, Yeongtae CHOI, Dajung LEE
  • Patent number: 11075343
    Abstract: Disclosed is an organic light emitting compound represented by Formula 1: HAr1—(L)n—HAr2??(1); an organic light emitting device including the organic light emitting compound of Formula 1: and an organic light emitting device including the organic light emitting compound of Formula 1 as a first compound and a second compound represented by Formula 2: HAr3—(L)n—HAr4??(2) .
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: July 27, 2021
    Assignee: SFC CO., LTD.
    Inventors: Se-jin Lee, Taejung Yu, Seok-bae Park, Byung-sun Yang, Su-Jin Lee, Bong-Hyang Lee, Yeongtae Choi
  • Patent number: 10957865
    Abstract: Disclosed is an organic light emitting compound represented by Formula I: HAr1-(L)n-HAr2??(I). Also disclosed is an organic light emitting diode including the organic light emitting compound. Particularly, the organic light emitting diode employs the organic light emitting compound as a material for electron injection and transport. The organic light emitting diode can be driven at a low voltage and has improved life characteristics compared to conventional organic light emitting diodes. Due to these advantages, the organic light emitting diode is useful in a variety of industrial applications, including displays and lighting systems.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: March 23, 2021
    Assignee: SFC CO., LTD.
    Inventors: Yeongtae Choi, Se-jin Lee, Seok-bae Park, Taejung Yu, Byung-sun Yang, Dajung Lee
  • Publication number: 20210057655
    Abstract: Disclosed is an organic light emitting compound represented by Formula I: HAr1-(L)n-HAr2??(I) Also disclosed is an organic light emitting diode including the organic light emitting compound. Particularly, the organic light emitting diode employs the organic light emitting compound as a material for electron injection and transport. The organic light emitting diode can be driven at a low voltage and has improved life characteristics compared to conventional organic light emitting diodes. Due to these advantages, the organic light emitting diode is useful in a variety of industrial applications, including displays and lighting systems.
    Type: Application
    Filed: October 29, 2020
    Publication date: February 25, 2021
    Applicant: SFC CO., LTD.
    Inventors: Yeongtae CHOI, Se-jin LEE, Seok-bae PARK, Taejung YU, Byung-sun YANG, Dajung LEE
  • Publication number: 20190140177
    Abstract: Disclosed are amine-substituted naphthalene derivatives and organic light emitting diodes including the same. In the organic light emitting diodes, at least one of the amine-substituted naphthalene derivatives is employed in a hole auxiliary layer interposed between a hole transport layer and a light emitting layer to enable efficient hole transport to the light emitting layer, achieving high luminous efficiency and long lifetime.
    Type: Application
    Filed: November 8, 2018
    Publication date: May 9, 2019
    Applicant: SFC CO., LTD.
    Inventors: Se-jin LEE, Bong-Hyang LEE, Taejung YU, Yeongtae CHOI, Dajung LEE
  • Publication number: 20180040834
    Abstract: Disclosed is an organic light emitting compound represented by Formula I: HAr1-(L)n-HAr2??(I) Also disclosed is an organic light emitting diode including the organic light emitting compound. Particularly, the organic light emitting diode employs the organic light emitting compound as a material for electron injection and transport. The organic light emitting diode can be driven at a low voltage and has improved life characteristics compared to conventional organic light emitting diodes. Due to these advantages, the organic light emitting diode is useful in a variety of industrial applications, including displays and lighting systems.
    Type: Application
    Filed: July 26, 2017
    Publication date: February 8, 2018
    Applicant: SFC CO., LTD.
    Inventors: Yeongtae CHOI, Se-jin LEE, Seok-bae PARK, Taejung YU, Byung-sun YANG, Dajung LEE
  • Publication number: 20170222160
    Abstract: Disclosed is an organic light emitting device including a first electrode, a second electrode opposite to the first electrode, and at least one organic layer interposed between the first and second electrodes. The organic layer includes first and second compounds represented by Formulae A and B, respectively: The organic light emitting device exhibits low driving voltage, high efficiency, and long life. Due to these advantages, the organic light emitting device is useful in a variety of industrial applications, including displays and lighting systems.
    Type: Application
    Filed: January 26, 2017
    Publication date: August 3, 2017
    Inventors: Se-jin LEE, Taejung YU, Seok-bae PARK, Byung-sun YANG, Su-Jin LEE, Bong-Hyang LEE, Yeongtae CHOI
  • Publication number: 20170207397
    Abstract: Disclosed is an organic light emitting compound represented by Formula 1: HAr1-(L)n-HAr2?? (1) Also disclosed is an organic light emitting device including the organic light emitting compound of Formula 1. Also disclosed is an organic light emitting device including the organic light emitting compound of Formula 1 as a first compound and a second compound represented by Formula 2: HAr3-(L)n-HAr4?? (2) The organic light emitting devices exhibit low driving voltage, high efficiency, and long life. Due to these advantages, the organic light emitting devices are useful in a variety of industrial applications, including displays and lighting systems.
    Type: Application
    Filed: January 13, 2017
    Publication date: July 20, 2017
    Inventors: Se-jin LEE, Taejung YU, Seok-bae PARK, Byung-sun YANG, Su-Jin LEE, Bong-Hyang LEE, Yeongtae CHOI