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).

  • Organic electroluminescent compound and organic electroluminescent device comprising the same
    Patent number: 11316114
    Abstract: The present invention relates to an organic EL device comprising an electron buffer material, and a first electrode, a second electrode opposing the first electrode, a light-emitting layer disposed between the two electrodes, and an electron transport zone and an electron buffer layer disposed between the light-emitting layer and the second electrode. By using an electron buffer material according to the present invention, the organic EL device having low driving voltage, high luminous efficiency, and excellent lifespan can be provided.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: April 26, 2022
    Assignees: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Sang Hee Cho, Hong Yeop Na, Zhengming Tang, Shaoguang Feng, Doo-Hyeon Moon
  • ORGANIC ELECTROLUMINESCENT COMPOUND AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220123230
    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 in a light-emitting layer, it is possible to produce an organic electroluminescent device having an improved driving voltage, luminous efficiency and/or lifetime properties.
    Type: Application
    Filed: October 12, 2021
    Publication date: April 21, 2022
    Inventors: Hee-Ryong KANG, So-Young JUNG, Jeong-Hwan JEON, Sang-Hee CHO
  • ORGANIC ELECTROLUMINESCENT COMPOUND, A PLURALITY OF HOST MATERIALS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220123223
    Abstract: The present disclosure relates to an organic electroluminescent compound represented by formula 2?, 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 the organic electroluminescent compound or a specific combination of compounds of the present disclosure, it is possible to provide an organic electroluminescent device having improved driving voltage, luminous efficiency, power efficiency, and/or lifespan characteristics.
    Type: Application
    Filed: September 28, 2021
    Publication date: April 21, 2022
    Inventors: Hee-Ryong KANG, Sang-Hee CHO, So-Young JUNG, Jin-Ri HONG, So-Mi PARK
  • Organic electroluminescent compound and organic electroluminescent device comprising the same
    Patent number: 11302874
    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, it is possible to provide an organic electroluminescent device having excellent thermal stability, low driving voltage, high luminous efficiency, and/or improved lifespan properties.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: April 12, 2022
    Inventors: Jeong-Eun Yang, Hong-Se Oh, Hee-Ryong Kang, Young-Gil Kim, Sang-Hee Cho
  • ORGANIC ELECTROLUMINESCENT COMPOUND AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220109110
    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 driving voltage, luminous efficiency, lifetime properties, and/or power efficiency.
    Type: Application
    Filed: March 16, 2021
    Publication date: April 7, 2022
    Inventors: Hyo-Soon Park, Jeong-Hwan Jeon, Sang-Hee Cho, Eun-Joung Choi, Dong-Gil Kim
  • PLURALITY OF HOST MATERIALS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220102645
    Abstract: The present disclosure relates to a plurality of host materials comprising at least one of a first host compound represented by formula 1 and at least one of a second host compound represented by formula 2 and an organic electroluminescent device comprising the same. By comprising the host materials, an organic electroluminescent device having low driving voltage and/or a high luminous efficiency and/or long lifespan can be provided.
    Type: Application
    Filed: June 28, 2019
    Publication date: March 31, 2022
    Inventors: Bitnari Kim, Su-Hyun LEE, So-Young JUNG, Tae-Jun HAN, Hyo-Soon PARK, Sang-Hee CHO, Jeong-Eun YANG
  • ORGANIC ELECTROLUMINESCENT COMPOUND, A PLURALITY OF HOST MATERIALS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220069228
    Abstract: The present disclosure relates to an organic electroluminescent compound represented by formula 1, a plurality of host materials comprising a combination of specific compounds, and an organic electroluminescent device comprising the same. The organic electroluminescent device having improved driving voltage, luminous efficiency and/or lifespan properties can be provided by including the organic electroluminescent compound or a specific combination of compounds according to the present disclosure as a host material(s).
    Type: Application
    Filed: August 2, 2021
    Publication date: March 3, 2022
    Inventors: Hyo-Soon PARK, Kyoung-Jin PARK, Sang-Hee CHO, So-Mi PARK, Dong-Hyung LEE
  • ORGANIC ELECTROLUMINESCENT COMPOUND AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220064179
    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 in a hole transport zone, it is possible to produce an organic electroluminescent device having improved luminous efficiency and/or lifespan characteristics.
    Type: Application
    Filed: August 19, 2021
    Publication date: March 3, 2022
    Inventors: Ji-Song JUN, Su-Hyun LEE, Sang-Hee CHO, Dong-Hyung LEE
  • PLURALITY OF HOST MATERIALS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220059777
    Abstract: The present disclosure relates to a plurality of host materials comprising a first host material comprising a compound represented by formula 1 and a second host material comprising a compound represented by formula 2 and an organic electroluminescent device comprising the same. By comprising the 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: August 18, 2021
    Publication date: February 24, 2022
    Inventors: Hyo-Jung Lee, So-Young JUNG, Sang-Hee CHO, Jin-Ri HONG
  • A PLURALITY OF HOST MATERIALS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220052271
    Abstract: The present disclosure relates to a plurality of host materials and an organic electroluminescent device comprising the same. By comprising the host materials according to the present disclosure, an organic electroluminescent device having low driving voltage and/or a high efficiency and/or long lifespan can be provided.
    Type: Application
    Filed: August 7, 2019
    Publication date: February 17, 2022
    Inventors: Bitnari KIM, Su-Hyun LEE, Hong-Se OH, So-Young JUNG, Sang-Hee CHO
  • ORGANIC ELECTROLUMINESCENT COMPOUND, A PLURALITY OF HOST MATERIALS, AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220048886
    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 an improved luminous efficiency.
    Type: Application
    Filed: August 2, 2021
    Publication date: February 17, 2022
    Inventors: Eun-Joung CHOI, Hyun-Ju KANG, Hong-Yeop NA, Su-Hyun LEE, Sang-Hee CHO
  • ORGANIC ELECTROLUMINESCENT COMPOUND, A PLURALITY OF HOST MATERIALS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220033414
    Abstract: The present disclosure relates to an organic electroluminescent compound represented by formula 2? or formula 2?, 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. An organic electroluminescent device having improved driving voltage, luminous efficiency, power efficiency and/or lifespan properties can be provided by including the organic electroluminescent compound or a specific combination of compounds according to the present disclosure as a host material(s).
    Type: Application
    Filed: July 23, 2021
    Publication date: February 3, 2022
    Inventors: So-Young JUNG, Jin-Ri HONG, Doo-Hyeon MOON, Sang-Hee CHO, Su-Hyun LEE, Du-Yong PARK, Mi-Ja LEE
  • PLURALITY OF HOST MATERIALS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20220020931
    Abstract: The present disclosure relates to a plurality of host materials comprising at least one first host compound represented by formula 1 and at least one second host compound represented by formula 2, and an organic electroluminescent device comprising the same. By comprising the 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: July 13, 2021
    Publication date: January 20, 2022
    Inventors: Hyun-Ju KANG, So-Young JUNG, Eun-Joung CHOI, Hong-Yeop NA, Sang-Hee CHO, Su-Hyun LEE, Jin-Ri HONG
  • Organic electroluminescent device comprising electrontransport layer and electron buffer layer
    Patent number: 11183640
    Abstract: The present disclosure relates to 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 layer and an electron buffer layer between the light-emitting layer and the second electrode. An organic electroluminescent device having low driving voltage, high luminous efficiency and/or long lifespan can be provided by comprising the compound of the present disclosure in an electron buffer layer and an electron transport layer.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: November 23, 2021
    Inventors: Sang-Hee Cho, Doo-Hyeon Moon
  • A PLURALITY OF HOST MATERIALS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20210359216
    Abstract: The present disclosure relates to a plurality of host materials comprising a first host material comprising a compound represented by formula 1, and a second host material comprising a compound represented by formula 2, and an organic electroluminescent device comprising the same. By comprising a specific combination of compounds as a host material, it is possible to provide an organic electroluminescent device having higher luminous efficiency and/or improved lifespan characteristics compared to conventional organic electroluminescent devices.
    Type: Application
    Filed: August 28, 2019
    Publication date: November 18, 2021
    Inventors: Bitnari KIM, Su-Hyun LEE, So-Young JUNG, Ji-Won UM, Jeong-Eun YANG, Sang-Hee CHO
  • Organic electroluminescent device
    Patent number: 11171302
    Abstract: The present disclosure relates to an organic electroluminescent device comprising an organic electroluminescent compound of high refractive index. According to the present disclosure, an organic electroluminescent device having decreased thickness while implementing a desired color coordinate, or implementing deeper color coordinate in the same device thickness can be provided. As such, the production efficiency of the device can be increased by decreasing the material amount used in the organic electroluminescent device or a broader light-emitting zone can be obtained due to deeper color characteristic in the same device thickness.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: November 9, 2021
    Inventors: Sung-Woo Jang, Dong-Hyung Lee, Sang-Hee Cho, Nam-Kyun Kim
  • ORGANIC ELECTROLUMINESCENT COMPOUND, A PLURALITY OF HOST MATERIALS, AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20210336153
    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 higher luminous efficiency and/or longer lifespan properties as compared with a conventional organic electroluminescent device.
    Type: Application
    Filed: May 13, 2019
    Publication date: October 28, 2021
    Inventors: BitNari KIM, Su-Hyun LEE, Hyo-Soon PARK, Tae-Jun HAN, Jeong-Eun YANG, Sang-Hee CHO, Doo-Hyeon MOON
  • ELECTRON BUFFERING MATERIAL AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20210328155
    Abstract: The present invention relates to an electron buffering material and an organic electroluminescent device comprising the same in an electron buffer layer. It is possible to provide an organic electroluminescent device having excellent luminous efficiency and lifespan characteristics by using the electron buffering material according to the present invention.
    Type: Application
    Filed: May 24, 2021
    Publication date: October 21, 2021
    Inventors: Sang-Hee CHO, Jeong-Hwan JEON, Hong-Yeop NA, Ji-Song JUN, Jae-Hoon SHIM, Kyung-Hoon CHOI, Chi-Sik KIM, Young-Jun CHO
  • ORGANIC ELECTROLUMINESCENT COMPOUND, ORGANIC ELECTROLUMINESCENT MATERIAL COMPRISING THE SAME, AND ORGANIC ELECTROLUMINESCENT DEVICE
    Publication number: 20210328150
    Abstract: The present disclosure relates to an organic electroluminescent compound, an organic electroluminescent material comprising the same, and an organic electroluminescent device. By comprising an organic electroluminescent compound according to the present disclosure and an organic electroluminescent material comprising the same, an organic electroluminescent device having low driving voltage and/or high luminous efficiency and/or long lifespan can be provided.
    Type: Application
    Filed: March 19, 2021
    Publication date: October 21, 2021
    Inventors: Hyo-Soon PARK, Doo-Hyeon Moon, Du-Yong Park, Hong-Se Oh, Kyoung-Jin Park, Dong-Hyung Lee, Sang-Hee Cho, So-Mi Park, Jin-Man Kim
  • PLURALITY OF HOST MATERIALS AND ORGANIC ELECTROLUMINESCENT DEVICE COMPRISING THE SAME
    Publication number: 20210328154
    Abstract: The present disclosure relates to a plurality of host materials comprising a first host material comprising a compound represented by formula 1, and a second host material comprising 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 higher luminous efficiency and/or longer lifetime properties as compared with a conventional organic electroluminescent device.
    Type: Application
    Filed: July 26, 2019
    Publication date: October 21, 2021
    Inventors: Bitnari KIM, Su-Hyun LEE, Doo-Hyeon MOON, Sang-Hee CHO