Patents by Inventor Seok-Joon Oh

Seok-Joon Oh 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: 11005061
    Abstract: An organic light emitting display device includes a first electrode and a second electrode disposed on a substrate opposite to each other, a first stack including a hole injection layer, a first hole transport layer, a first light emitting layer, and a first electron transport layer sequentially stacked on the first electrode, a second stack including a second hole transport layer, a second light emitting layer, and a second electron transport layer sequentially stacked between the first stack and the second electrode, and a charge generation layer disposed between the first stack and the second stack and including an N-type charge generation layer and a P-type charge generation layer to control charge balance between the first and second stacks. The P-type charge generation layer is doped with 1% to 20% of a hole transport material based on a volume of the P-type charge generation layer.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: May 11, 2021
    Assignee: LG Display Co., Ltd.
    Inventors: Ki-Woog Song, Chang-Wook Han, Hong-Seok Choi, Sung-Hoon Pieh, Jeong-Dae Seo, Seok-Joon Oh, Youn-Seok Kam
  • Patent number: 10157966
    Abstract: An organic light emitting display device includes first and second electrodes facing each other on a substrate, a charge generation layer formed between the first and second electrodes, a first light emitting stack formed between the charge generation layer and the first electrode, and a second light emitting stack formed between the charge generation layer and the second electrode, wherein a hole injection layer of a light emitting stack to realize blue color of the first and second light emitting stacks is formed by doping a host formed of hexaazatriphenylene (HAT-CN) with 0.5% to less than 10% of a dopant formed of a hole transporting material based on a volume of the hole injection layer.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: December 18, 2018
    Assignee: LG Display Co., Ltd.
    Inventors: Youn-Seok Kam, Chang-Wook Han, Hong-Seok Choi, Sung-Hoon Pieh, Seok-Joon Oh, Ki-Woog Song
  • Publication number: 20160307970
    Abstract: An organic light emitting display device includes first and second electrodes facing each other on a substrate, a charge generation layer formed between the first and second electrodes, a first light emitting stack formed between the charge generation layer and the first electrode, and a second light emitting stack formed between the charge generation layer and the second electrode, wherein a hole injection layer of a light emitting stack to realize blue color of the first and second light emitting stacks is formed by doping a host formed of hexaazatriphenylene (HAT-CN) with 0.5% to less than 10% of a dopant formed of a hole transporting material based on a volume of the hole injection layer.
    Type: Application
    Filed: June 28, 2016
    Publication date: October 20, 2016
    Inventors: Youn-Seok KAM, Chang-Wook HAN, Hong-Seok CHOI, Sung-Hoon PIEH, Seok-Joon OH, Ki-Woog SONG
  • Patent number: 9431626
    Abstract: An organic light emitting display device includes first and second electrodes facing each other on a substrate, a charge generation layer formed between the first and second electrodes, a first light emitting stack formed between the charge generation layer and the first electrode, and a second light emitting stack formed between the charge generation layer and the second electrode, wherein a hole injection layer of a light emitting stack to realize blue color of the first and second light emitting stacks is formed by doping a host formed of hexaazatriphenylene (HAT-CN) with 0.5% to less than 10% of a dopant formed of a hole transporting material based on a volume of the hole injection layer.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: August 30, 2016
    Assignee: LG Display Co., Ltd.
    Inventors: Youn-Seok Kam, Chang-Wook Han, Hong-Seok Choi, Sung-Hoon Pieh, Seok-Joon Oh, Ki-Woog Song
  • Patent number: 9184405
    Abstract: An organic light emitting display device includes first and second electrodes facing each other on a substrate, at least one emission layer formed between the first and second electrodes, a hole transport layer formed between the first electrode and the emission layer, and an electron transport layer formed between the second electrode and the emission layer, wherein the emission layer includes a first emission mixed layer formed on the hole transport layer, the first emission mixed layer including a first hole-type host and a first phosphorescent dopant, and a second emission mixed layer formed between the first emission mixed layer and the electron transport layer, the second emission mixed layer including a first electron-type host and a second phosphorescent dopant.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: November 10, 2015
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Ki-Woog Song, Sung-Hoon Pieh, Seok-Joon Oh, Youn-Seok Kam, Dong-Hyuk Kim, Seon-Keun Yoo, Tae-Shick Kim
  • Publication number: 20150155513
    Abstract: An organic light emitting device containing a multilayer stack structure including n stacks between an anode and a cathode is described, wherein the respective stacks comprise a hole transport layer, a light emitting layer and an electron transport layer, an n-type charge generation layer and a p-type charge generation layer respectively provided between the different adjacent stacks, wherein the p-type charge generation layer comprises an indenofluorenedione derivative represented by Formula 1 or an imine derivative represented by Formula 2 or 3.
    Type: Application
    Filed: December 2, 2014
    Publication date: June 4, 2015
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Sung-Hoon Pieh, Chang-Wook Han, Seok-Joon Oh, Ki-Woog Song, Tae-Shick Kim, Hee-Dong Choi, Seung-Hyun Kim, Seong-Su Jeon, Chi-Yul Song
  • Publication number: 20140183475
    Abstract: An organic light emitting display device includes a first electrode and a second electrode disposed on a substrate opposite to each other, a first stack including a hole injection layer, a first hole transport layer, a first light emitting layer, and a first electron transport layer sequentially stacked on the first electrode, a second stack including a second hole transport layer, a second light emitting layer, and a second electron transport layer sequentially stacked between the first stack and the second electrode, and a charge generation layer disposed between the first stack and the second stack and including an N-type charge generation layer and a P-type charge generation layer to control charge balance between the first and second stacks. The P-type charge generation layer is doped with 1% to 20% of a hole transport material based on a volume of the P-type charge generation layer.
    Type: Application
    Filed: December 5, 2013
    Publication date: July 3, 2014
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Ki-Woog Song, Chang-Wook Han, Hong-Seok Choi, Sung-Hoon Pieh, Jeong-Dae Seo, Seok-Joon Oh, Youn-Seok Kam
  • Publication number: 20140183494
    Abstract: An organic light emitting display device includes first and second electrodes facing each other on a substrate, a charge generation layer formed between the first and second electrodes, a first light emitting stack formed between the charge generation layer and the first electrode, and a second light emitting stack formed between the charge generation layer and the second electrode, wherein a hole injection layer of a light emitting stack to realize blue color of the first and second light emitting stacks is formed by doping a host formed of hexaazatriphenylene (HAT-CN) with 0.5% to less than 10% of a dopant formed of a hole transporting material based on a volume of the hole injection layer.
    Type: Application
    Filed: December 19, 2013
    Publication date: July 3, 2014
    Applicant: LG Display Co., Ltd.
    Inventors: Youn-Seok KAM, Chang-Wook HAN, Hong-Seok CHOI, Sung-Hoon PIEH, Seok-Joon OH, Ki-Woog SONG
  • Publication number: 20140124766
    Abstract: An organic light emitting display device includes first and second electrodes facing each other on a substrate, at least one emission layer formed between the first and second electrodes, a hole transport layer formed between the first electrode and the emission layer, and an electron transport layer formed between the second electrode and the emission layer, wherein the emission layer includes a first emission mixed layer formed on the hole transport layer, the first emission mixed layer including a first hole-type host and a first phosphorescent dopant, and a second emission mixed layer formed between the first emission mixed layer and the electron transport layer, the second emission mixed layer including a first electron-type host and a second phosphorescent dopant.
    Type: Application
    Filed: November 6, 2013
    Publication date: May 8, 2014
    Applicant: LG DISPLAY CO., LTD.
    Inventors: Ki-Woog SONG, Sung-Hoon PIEH, Seok-Joon OH, Youn-Seok KAM, Dong-Hyuk KIM, Seon-Keun YOO, Tae-Shick KIM
  • Publication number: 20100167489
    Abstract: A method of fabricating an MIM capacitor may include a first electrode formed on and/or over a semiconductor substrate, a dielectric layer composed of an oxygen material formed on and/or over the first electrode under an oxygen atmosphere. A second electrode is formed on and/or over the dielectric layer. Because the dielectric layer is formed under an oxygen atmosphere, an oxygen composition ratio of the dielectric layer is increased.
    Type: Application
    Filed: June 26, 2009
    Publication date: July 1, 2010
    Inventor: Seok-Joon Oh