Patents by Inventor Yoon-Kyoo Lee

Yoon-Kyoo 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).

  • Organic light emitting device having stacked electron transport layers
    Patent number: 9184407
    Abstract: An organic light emitting device including: a first electrode, a hole injection layer on the first electrode, a hole transport layer on the hole injection layer, an organic light emitting layer on the hole transport layer, a first electron transport layer on the organic light emitting layer, a second electron transport layer on the organic light emitting layer, an electron injection layer on the second electron transport layer and a second electrode on the electron injection layer, where the first electron transport layer includes a first material for improving a thermal stability, a second material for improving a luminous efficiency and a third material for reducing a driving voltage, and the second electron transport layer is laminated with the first electron transport layer, and the second electrode faces the first electrode.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: November 10, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sun-Hye Lee, Jae-Bok Kim, Won-Jun Song, Myung-Hwan Kim, Ji-Young Kim, Hye-Lim Shin, Tae-Kyu Shim, Yoon-Kyoo Lee
  • ORGANIC LIGHT EMITTING DEVICE, ORGANIC LIGHT EMITTING DISPLAY APPARATUS HAVING THE ORGANIC LIGHT EMITTING DEVICE AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20150028308
    Abstract: An organic light emitting device including: a first electrode, a hole injection layer on the first electrode, a hole transport layer on the hole injection layer, an organic light emitting layer on the hole transport layer, a first electron transport layer on the organic light emitting layer, a second electron transport layer on the organic light emitting layer, an electron injection layer on the second electron transport layer and a second electrode on the electron injection layer, where the first electron transport layer includes a first material for improving a thermal stability, a second material for improving a luminous efficiency and a third material for reducing a driving voltage, and the second electron transport layer is laminated with the first electron transport layer, and the second electrode faces the first electrode.
    Type: Application
    Filed: July 17, 2014
    Publication date: January 29, 2015
    Inventors: Sun-Hye Lee, Jae-Bok Kim, Won-Jun Song, Myung-Hwan Kim, Ji-Young Kim, Hye-Lim Shin, Tae-Kyu Shim, Yoon-Kyoo Lee