Patents by Inventor Mi-Ja Lee

Mi-Ja Lee 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: 20230157168
    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 a specific combination of compounds according to the present disclosure as a plurality of host materials, or by comprising the compound according to the present disclosure, 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 device.
    Type: Application
    Filed: October 28, 2022
    Publication date: May 18, 2023
    Inventors: So-Young JUNG, Su-Hyun LEE, Jin-Ri HONG, Sang-Hee CHO, Mi-Ja LEE, Seung-Hyun YOON
  • Publication number: 20230139032
    Abstract: The present disclosure relates to three different types of host materials, and an organic electroluminescent device comprising the same, and it is possible to provide an organic electroluminescent device having higher luminous efficiency and/or improved lifetime properties compared to a conventional organic electroluminescent device.
    Type: Application
    Filed: August 18, 2022
    Publication date: May 4, 2023
    Inventors: Sang-Hee CHO, Young-Jae Kim, HaeYeon Kim, Young-Jun Cho, Kyung-Hoon Choi, So-Young Jung, Su-Hyun Lee, Mi-Ja Lee
  • Publication number: 20230096621
    Abstract: The present disclosure relates to an organic electroluminescent compound comprising a ligand 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 higher luminous efficiency and/or longer lifetime properties compared to a conventional organic electroluminescent device.
    Type: Application
    Filed: June 24, 2022
    Publication date: March 30, 2023
    Inventors: Hyo-Soon PARK, Mi-Ja LEE, Kyung-Hoon CHOI, Kyoung-Jin PARK, Jin-Ri HONG, So-Mi PARK, Hyun KIM
  • 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
  • Publication number: 20220384744
    Abstract: The present disclosure relates to a plurality of host materials comprising a first host compound represented by formula 1 and a second host compound represented by formula 2 and an organic electroluminescent device comprising the same. By comprising the specific combination of the compound as host materials, an organic electroluminescent device having low driving voltage, high luminous efficiency and/or long lifespan can be provided compared with a conventional organic electroluminescent device.
    Type: Application
    Filed: August 28, 2019
    Publication date: December 1, 2022
    Inventors: Su-Hyun LEE, Bitnari KIM, So-Young JUNG, Hyo-Nim SHIN, Mi-Ja LEE
  • Publication number: 20220109109
    Abstract: The present disclosure relates to an organic electroluminescent compound represented by formula 1? or 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 the specific combination of compounds according to the present disclosure as a host material(s), it is possible to provide an organic electroluminescent device having improved driving voltage, luminous efficiency, power efficiency and/or lifetime properties.
    Type: Application
    Filed: August 18, 2021
    Publication date: April 7, 2022
    Inventors: Chi-Sik KIM, Kyung-Hoon CHOI, Hyo-Nim SHIN, Kyoung-Jin PARK, Hyun-Woo KANG, Soo-Yong LEE, Seung-Hoon YOO, Mi-Ja LEE, Samuel KIM
  • 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
  • Publication number: 20210296595
    Abstract: The present disclosure relates to an organic electroluminescent compound represented by formula 2-1, 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 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 lower driving voltage, higher luminous efficiency, and/or improved lifetime properties, compared to conventional organic electroluminescent devices.
    Type: Application
    Filed: February 26, 2021
    Publication date: September 23, 2021
    Inventors: Sang-Hee CHO, So-Young JUNG, Mi-Ja LEE, Su-Hyun LEE, Jin-Ri HONG
  • Publication number: 20210269405
    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 improved driving voltage, lifetime properties, and/or power efficiency.
    Type: Application
    Filed: February 12, 2021
    Publication date: September 2, 2021
    Inventors: Hyo-Jung LEE, Mi-Ja Lee, Dong-Hyung Lee, Jin-Ri Hong
  • Publication number: 20210202849
    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 host materials, it is possible to provide an organic electroluminescent device having lower driving voltage, higher luminous efficiency, higher power efficiency, and/or better lifetime properties, compared to conventional organic electroluminescent devices.
    Type: Application
    Filed: December 11, 2020
    Publication date: July 1, 2021
    Inventors: So-Young Jung, Su-Hyun Lee, Mi-Ja Lee, Doo-Hyeon Moon, Sang-Hee Cho
  • Publication number: 20210175433
    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 improved driving voltage, luminous efficiency, lifetime and/or power efficiency properties.
    Type: Application
    Filed: December 3, 2020
    Publication date: June 10, 2021
    Inventors: Hyun Kim, Ji-Won Um, Kyoung-Jin Park, Mi-Ja Lee, Chi-Sik Kim
  • Publication number: 20210175432
    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 host materials, it is possible to provide an organic electroluminescent device having higher luminous efficiency, higher power efficiency, and/or better lifetime properties, compared to conventional organic electroluminescent devices.
    Type: Application
    Filed: December 3, 2020
    Publication date: June 10, 2021
    Inventors: So-Young Jung, Su-Hyun Lee, Mi-Ja Lee, Doo-Hyeon Moon, Sang-Hee Cho
  • Publication number: 20210135127
    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 host materials, it is possible to provide an organic electroluminescent device having lower driving voltage, higher luminous efficiency, higher power efficiency, and/or superior lifespan characteristics compared to conventional organic electroluminescent devices.
    Type: Application
    Filed: October 20, 2020
    Publication date: May 6, 2021
    Inventors: So-Young Jung, Su-Hyun LEE, Mi-Ja LEE, Sang-Hee CHO, Doo-Hyeon MOON
  • Publication number: 20210126203
    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: October 20, 2020
    Publication date: April 29, 2021
    Inventors: So-Young Jung, Su-Hyun Lee, Mi-Ja Lee, Doo-Hyeon Moon, Sang-Hee Cho
  • Patent number: 10186669
    Abstract: The present invention relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By using the organic electroluminescent compound according to the present invention, it is possible to produce an organic electroluminescent device having low driving voltage, excellent current and power efficiencies, and noticeably improved driving lifespan.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: January 22, 2019
    Assignee: ROHM AND HAAS ELECTRONIC MATERIALS KOREA LTD
    Inventors: Hee-Ryong Kang, Hyun-Ju Kang, Jin-Ri Hong, Doo-Hyeon Moon, Young-Mook Lim, Bit-Na-Ri Kim, Nam-Kyun Kim, Mi-Ja Lee
  • Patent number: 9997723
    Abstract: The present invention relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By using the organic electroluminescent compound according to the present invention, it is possible to produce an organic electroluminescent device having low driving voltage, excellent current and power efficiencies, and noticeably improved driving lifespan.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: June 12, 2018
    Assignee: Rohm and Haas Electronic Materials Korea Ltd
    Inventors: Hee-Ryong Kang, Hyun-Ju Kang, Jin-Ri Hong, Doo-Hyeon Moon, Young-Mook Lim, Bitnari Kim, Nam-Kyun Kim, Mi-Ja Lee
  • Patent number: 9859507
    Abstract: The present disclosure relates to an organic electroluminescent compound of Formula 1 (variables R1-R10 defined herein), and an organic electroluminescent device comprising the same. By using the organic electroluminescent compound according to the present disclosure, it is possible to produce an organic electroluminescent device which can be operated at a lowered driving voltage, shows excellence in luminous efficiency such as current efficiency and power efficiency, and has high color purity and improved lifespan.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: January 2, 2018
    Assignee: ROHM AND HAAS ELECTRONIC MATERIALS KOREA LTD.
    Inventors: Hee-Ryong Kang, Hyun-Ju Kang, Young-Mook Lim, Mi-Ja Lee, Nam-Kyun Kim, Bitnari Kim, Jin-Ri Hong, Doo-Hyeon Moon, Su-Hyun Lee
  • Patent number: 9806271
    Abstract: The present disclosure relates to an organic electroluminescent compound of Formula 1 (variables Y1, Y2 and R1 to R4 defined herein), and an organic electroluminescent device comprising the same. The organic electroluminescent compound according to the present disclosure can be used for the manufacture of an organic electroluminescent device showing improvement in luminous efficiency, especially in current efficiency.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: October 31, 2017
    Assignee: ROHM AND HAAS ELECTRONIC MATERIALS KOREA LTD.
    Inventors: Mi-Ja Lee, Bitnari Kim, Nam-Kyun Kim, Hee-Ryong Kang
  • Publication number: 20170162797
    Abstract: The present disclosure relates to an organic electroluminescent compound of Formula 1 (variables Y1, Y2 and R1 to R4 defined herein), and an organic electroluminescent device comprising the same. The organic electroluminescent compound according to the present disclosure can be used for the manufacture of an organic electroluminescent device showing improvement in luminous efficiency, especially in current efficiency.
    Type: Application
    Filed: July 10, 2015
    Publication date: June 8, 2017
    Inventors: Mi-Ja LEE, Bitnari KIM, Nam-Kyun KIM, Hee-Ryong KANG
  • Publication number: 20170047528
    Abstract: The present disclosure relates to an organic electroluminescent compound of Formula 1 (variables R1-R10 defined herein), and an organic electroluminescent device comprising the same. By using the organic electroluminescent compound according to the present disclosure, it is possible to produce an organic electroluminescent device which can be operated at a lowered driving voltage, shows excellence in luminous efficiency such as current efficiency and power efficiency, and has high color purity and improved lifespan.
    Type: Application
    Filed: April 30, 2015
    Publication date: February 16, 2017
    Inventors: Hee-Ryong Kang, Hyun-Ju Kang, Young-Mook Lim, Mi-Ja Lee, Nam-Kyun Kim, Bitnari Kim, Jin-Ri Hong, Doo-Hyeon Moon, Su-Hyun Lee