Patents by Inventor Sang-Hee Cho

Sang-Hee Cho 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).

  • PLURALITY OF HOST MATERIALS, ORGANIC ELECTROLUMINESCENT COMPOUND, AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20230117383
    Abstract: The present disclosure relates to a plurality of host materials, an organic electroluminescent compound, and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound according to the present disclosure or by comprising a specific combination of compounds according to the present disclosure as a plurality of host materials, it is possible to produce an organic electroluminescent device having improved driving voltage, luminous efficiency, and/or lifetime properties compared to the conventional organic electroluminescent devices.
    Type: Application
    Filed: May 2, 2022
    Publication date: April 20, 2023
    Inventors: Chi-Sik KIM, Ji-Song JUN, Soo-Yong LEE, Seung-Hoon YOO, Kyoung-Jin PARK, Hyun-Woo KANG, Hyun-Ju KANG, So-Young JUNG, Sang-Hee CHO
  • Organic electroluminescent compound and organic electroluminescent device comprising the same
    Patent number: 11588112
    Abstract: The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent compound according to the present disclosure is contained in an electron transport layer and/or an electron buffer layer, so that an organic electroluminescent device having improved light-emitting efficiency can be manufactured.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: February 21, 2023
    Inventors: Doo-Hyeon Moon, Sang-Hee Cho
  • Plurality of host materials and organic electroluminescent device comprising the same
    Patent number: 11552257
    Abstract: The present disclosure relates to a plurality of host materials comprising a first host material having a compound represented by formula 1, and a second host material having a compound represented by formula 2, and an organic electroluminescent device comprising the same. By comprising a specific combination of compounds of the present disclosure as host materials, it is possible to provide an organic electroluminescent device having long lifetime properties while having an equivalent or improved level of power efficiency compared to conventional organic electroluminescent devices.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: January 10, 2023
    Inventors: Bitnari Kim, Doo-Hyeon Moon, Su-Hyun Lee, Du-Yong Park, So-Young Jung, Hae-Yeon Kim, Sang-Hee Cho
  • PLURALITY OF HOST MATERIALS, ORGANIC ELECTROLUMINESCENT COMPOUND AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20230006147
    Abstract: The present disclosure relates to a plurality of host materials and an organic electroluminescent device comprising the same. By comprising the specific combination of compounds according to the present disclosure as a plurality of host materials according to the present disclosure, it is possible to provide an organic electroluminescent device having improved driving voltage, luminous efficiency, and/or lifetime property compared to the conventional organic electroluminescent devices.
    Type: Application
    Filed: May 26, 2022
    Publication date: January 5, 2023
    Inventors: Sang-Hee Cho, Bitnari Kim, Young-Jae Kim, So-Young Jung, Mi-Ja Lee, Su-Hyun Lee, Tae-Jun Han, HaeYeon Kim
  • ORGANIC ELECTROLUMINESCENT COMPOUND, A PLURALITY OF HOST MATERIALS, AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20230002332
    Abstract: The present disclosure relates to a plurality of host materials comprising a first host material including a compound represented by formula 1 and a second host material including a compound represented by formula 2, and an organic electroluminescent device comprising the same. In addition, the present disclosure relates to an organic electroluminescent compound, and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound and/or a specific combination of compounds according to the present disclosure as host materials, an organic electroluminescent device having high luminous efficiency and long lifespan property can be provided.
    Type: Application
    Filed: May 25, 2022
    Publication date: January 5, 2023
    Inventors: So-Young JUNG, Su-Hyun Lee, Jin-Ri Hong, Jin-Man Kim, Hyo-Nim Shin, Sang-Hee Cho
  • PLURALITY OF HOST MATERIALS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220356193
    Abstract: The present disclosure relates to a plurality of host materials comprising at least one first host compound and at least one second host compound, and an organic electroluminescent device comprising the same. By comprising a specific combination of the compounds wherein the first host compound is represented by formula 1 and the second host compound is represented by formula 2, it is possible to provide an organic electroluminescent device having improved driving voltage, luminous efficiency, power efficiency and/or lifetime property.
    Type: Application
    Filed: March 26, 2021
    Publication date: November 10, 2022
    Inventors: So-Young Jung, Ji-Song JUN, Su-Hyun LEE, Sang-Hee CHO, Jin-Ri HONG
  • Organic electroluminescent compound and organic electroluminescent device comprising the same
    Patent number: 11495750
    Abstract: The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound of the present disclosure, an organic electroluminescent device having low driving voltage, high luminous efficiency, and/or excellent lifespan characteristics can be provided.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: November 8, 2022
    Inventors: Doo-Hyeon Moon, Bitnari Kim, Sang-Hee Cho
  • ORGANIC ELECTROLUMINESCENT COMPOUNDS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220290042
    Abstract: The present invention relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent compound according to the present invention can be comprised in a light-emitting layer or an electron buffer layer, and is effective to produce an organic electroluminescent device having low driving voltage, excellent current and power efficiencies, and significantly improved operational lifespan.
    Type: Application
    Filed: May 24, 2022
    Publication date: September 15, 2022
    Inventors: Hee-Ryong Kang, Jin-Ri Hong, Bitnari Kim, Sang-Hee Cho
  • ORGANIC ELECTROLUMINESCENT COMPOUND, A PLURALITY OF HOST MATERIALS, AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220281894
    Abstract: The present disclosure relates to an organic electroluminescent compound, a plurality of host materials, and an organic electroluminescent device comprising the same. An organic electroluminescent device having improved driving voltage, luminous efficiency, and/or lifespan properties can be provided by including the organic electroluminescent compound according to the present disclosure as a single host material or by including a specific combination of compounds according to the present disclosure as a plurality of host materials.
    Type: Application
    Filed: February 18, 2022
    Publication date: September 8, 2022
    Inventors: Ji-Song JUN, Kyoung-Jin PARK, Chi-Sik KIM, Sang-Hee CHO, Su-Hyun LEE
  • ORGANIC ELECTROLUMINESCENT COMPOUND, A PLURALITY OF HOST MATERIALS, AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220263031
    Abstract: The present disclosure relates to an organic electroluminescent compound, a plurality of host materials, and an organic electroluminescent device comprising the same. By comprising an organic electroluminescent compound and/or a plurality of host materials according to the present disclosure, an organic electroluminescent device having low driving voltage and/or high luminous efficiency and/or long lifespan can be provided.
    Type: Application
    Filed: January 26, 2022
    Publication date: August 18, 2022
    Inventors: Ji-Won UM, Hong-Se OH, Jeong-Hwan JEON, Mi-Ran SEO, Sang-Hee CHO, Dong-Hyung LEE, Tae-Jun HAN
  • ORGANIC ELECTROLUMINESCENT COMPOUND AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220255017
    Abstract: The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound according to the present disclosure, it is possible to provide an organic electroluminescent device having good thermal stability, low driving voltage, high luminous efficiency and/or improved lifetime properties.
    Type: Application
    Filed: June 16, 2020
    Publication date: August 11, 2022
    Inventors: Hyo-Jung LEE, Jin-Ri HONG, Hyo-Soon PARK, Sang-Hee CHO, Dong-Hyung LEE, Tae-Jun HAN, Ye-Jin JEON
  • ORGANIC ELECTROLUMINESCENT COMPOUND, A PLURALITY OF HOST MATERIALS, AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220231229
    Abstract: The present disclosure relates to an organic electroluminescent compound, a plurality of host materials, and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound according to the present disclosure as a single host material, or a specific combination of compounds according to the present disclosure as a plurality of host materials, it is possible to produce an organic electroluminescent device having improved driving voltage, luminous efficiency, and/or lifetime properties.
    Type: Application
    Filed: December 14, 2021
    Publication date: July 21, 2022
    Inventors: Jeong-Eun Yang, Sang-Hee CHO, Hyo-Nim SHIN, Hyun KIM, Jeong-Hwan JEON, Jin-Ri HONG, Kyoung-Jin PARK
  • Electron buffering materials, electron transport materials and organic electroluminescent device comprising the same
    Patent number: 11394000
    Abstract: The present disclosure relates to an electron buffering material, and an organic electroluminescent device comprising a first electrode, a second electrode facing the first electrode, a light-emitting layer between the first electrode and the second electrode, and an electron transport zone and an electron buffering layer between the light-emitting layer and the second electrode. The organic electroluminescent device comprising the electron buffering material of the present disclosure has low driving voltage, excellent luminous efficiency, and long lifespan.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: July 19, 2022
    Inventors: Hee-Choon Ahn, Sang-Hee Cho
  • Organic electroluminescent device
    Patent number: 11387417
    Abstract: The present disclosure relates to an organic electroluminescent device comprising a light-emitting layer and a hole transport zone. By comprising a specific combination of a light-emitting layer and a hole transport zone, it is possible to provide an organic electroluminescent device having low driving voltage, high luminous efficiency and/or long lifespan properties.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: July 12, 2022
    Inventors: Tae-Jin Lee, Jeong-Eun Yang, Dong-Hyung Lee, Sang-Hee Cho
  • ORGANIC ELECTROLUMINESCENT COMPOUND, A PLURALITY OF HOST MATERIALS COMPRISING THE SAME, AND ORGANIC ELECTROLUMINESCENT DEVICE
    Publication number: 20220173322
    Abstract: The present disclosure relates to an organic electroluminescent compound, a plurality of host materials comprising the same, and an organic electroluminescent device. By comprising the organic electroluminescent compound and/or a plurality of host materials comprising the same according to the present disclosure, an organic electroluminescent device having low driving voltage and/or high luminous efficiency and/or long lifespan property can be provided.
    Type: Application
    Filed: November 17, 2021
    Publication date: June 2, 2022
    Inventors: Hyo-Soon PARK, Young-Jae KIM, Sang-Hee CHO, Su-Hyun LEE
  • ORGANIC ELECTROLUMINESCENT COMPOUND AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220173330
    Abstract: The present disclosure relates to an organic electroluminescent compound represented by formula 1 and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound of the present disclosure, it is possible to provide an organic electroluminescent device having improved operating voltage, luminous efficiency, lifetime, and/or power efficiency.
    Type: Application
    Filed: January 16, 2020
    Publication date: June 2, 2022
    Inventors: So-Young JUNG, Ji-Song JUN, Su-Hyun LEE, Sang-Hee CHO
  • PLURALITY OF HOST MATERIALS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220165956
    Abstract: The present disclosure relates to a plurality of host materials and an organic electroluminescent device comprising the same. The organic electroluminescent device of the present disclosure can exhibit excellent lifespan characteristics while maintaining high luminous efficiency by including a specific combination of a plurality of host compounds.
    Type: Application
    Filed: February 14, 2022
    Publication date: May 26, 2022
    Inventors: Sang-Hee CHO, Doo-Hyeon MOON, Bitnari KIM
  • ORGANIC ELECTROLUMINESCENT COMPOUND AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220162210
    Abstract: The present disclosure relates to an organic electroluminescent compound, and an organic electroluminescent device comprising the same. It is possible to provide an organic electroluminescent device which can be deposited at a low deposition temperature and/or in which clogging is reduced.
    Type: Application
    Filed: March 24, 2020
    Publication date: May 26, 2022
    Inventors: Hong-Se OH, Sung-Woo JANG, Joon-Hyung KIL, Seon-Jin HWANG, Seung-Ae KIM, Hee-Ryong KANG, Sang-Hee CHO, Hyo-Soon PARK
  • ORGANIC ELECTROLUMINESCENT COMPOUND, A PLURALITY OF HOST MATERIALS, AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220144856
    Abstract: The present disclosure relates to an organic electroluminescent compound, a plurality of host materials, and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound according to the present disclosure as a single host material, or the specific combination of compounds according to the present disclosure as a plurality of host materials, it is possible to provide an organic electroluminescent device having improved luminous efficiency.
    Type: Application
    Filed: November 2, 2021
    Publication date: May 12, 2022
    Inventors: Hyun-Ju KANG, Eun-Joung CHOI, Hyo-Jung LEE, Su-Hyun LEE, Kyoung-Jin PARK, Sang-Hee CHO, Hong-Yeop NA
  • ORGANIC ELECTROLUMINESCENT COMPOUND AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220131081
    Abstract: The present disclosure relates to an organic electroluminescent compound represented by formula 1 and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound of the present disclosure, it is possible to provide an organic electroluminescent device having long lifetime and/or high luminous efficiency properties.
    Type: Application
    Filed: January 22, 2020
    Publication date: April 28, 2022
    Inventors: Doo-Hyeon MOON, Su-Hyun LEE, Du-Yong PARK, Sang-Hee CHO, Dong-Hyung LEE