Patents by Inventor Seung Wook Chang

Seung Wook Chang 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: 20080231178
    Abstract: An organic light emitting diode (OLED) may include a first electrode, a hole injection layer on the first electrode, an emission layer on the hole injection layer, an electron injection layer on the emission layer, and a second electrode on the electron injection layer, wherein an absolute value of a difference between a work function of the first electrode and a work function of the second electrode is less than 0.5 eV, and at least one of the hole injection layer and the electron injection layer is a multilayer.
    Type: Application
    Filed: March 21, 2008
    Publication date: September 25, 2008
    Inventors: Soon-Ryong Park, Il-Soo Park, Jun-Sik Oh, Dae-Yup Shin, Mu-Hyun Kim, Won-Jun Song, Seung-Wook Chang, Yeun-Joo Sung
  • Publication number: 20070285010
    Abstract: Provided are an organic light emitting device (OLED) comprising: a first electrode; a second electrode; a hole injection layer (HIL), a hole transporting layer (HTL), and an emitting layer sequentially formed between the first electrode and the second electrode, wherein the work function, the IP or the absolute value of the highest occupied molecular orbital (HOMO) level of the HIL is greater than or equal to the absolute value of HOMO level of the HTL. In the OLED, the energy relationships between organic layers are controlled to facilitate hole injection and optimize the charge balance. Thus the efficiency of the OLED improves and the lifetime of the OLED increases.
    Type: Application
    Filed: April 13, 2007
    Publication date: December 13, 2007
    Inventors: Tae-Woo Lee, Jong-Jin Park, Mu-Hyun Kim, Seung-Wook Chang
  • Publication number: 20070262299
    Abstract: An organic light emitting device which has an anode, i.e. a lower electrode, made of a single metal layer in a top emission structure, and a method of fabricating the same are provided. The organic light emitting device is constructed with a substrate, an anode disposed on the substrate and including a metal, a metal fluoride layer disposed on the anode, an organic layer disposed on the metal fluoride layer and including at least an organic emission layer, and a cathode disposed on the organic layer.
    Type: Application
    Filed: December 14, 2006
    Publication date: November 15, 2007
    Inventors: Sam-Il Kho, Byeong-Wook Yoo, Yeun-Joo Sung, Jae-Ho Lee, Seung-Hyun Lee, Seung-Wook Chang, Nam-Choul Yang, Myung-Won Song