Patents by Inventor Tan D. Ngo

Tan D. Ngo 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).

  • Highly stable and efficient OLEDs with a phosphorescent-doped mixed layer architecture
    Patent number: 6803720
    Abstract: A highly stable and efficient organic light emitting device with a phosphorescent-doped mixed layer architecture comprises an anode layer; hole injecting layer over the anode layer; a mixed layer over the hole injecting layer, the mixed layer comprising an organic small molecule hole transporting material, an organic small molecule electron transporting material and a phosphorescent dopant; and a cathode layer over the mixed layer. An electron transporting layer may be present between the mixed layer and the cathode layer and a hole transporting layer may be present between the hole injecting layer and the mixed layer.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: October 12, 2004
    Assignee: Universal Display Corporation
    Inventors: Raymond C. Kwong, Michael G. Hack, Theodore Zhou, Julia J. Brown, Tan D. Ngo
  • Highly stable and efficient OLEDs with a phosphorescent-doped mixed layer architecture
    Publication number: 20020074935
    Abstract: A highly stable and efficient organic light emitting device with a phosphorescent-doped mixed layer architecture comprises an anode layer; hole injecting layer over the anode layer; a mixed layer over the hole injecting layer, the mixed layer comprising an organic small molecule hole transporting material, an organic small molecule electron transporting material and a phosphorescent dopant; and a cathode layer over the mixed layer. An electron transporting layer may be present between the mixed layer and the cathode layer and a hole transporting layer may be present between the hole injecting layer and the mixed layer.
    Type: Application
    Filed: December 15, 2000
    Publication date: June 20, 2002
    Inventors: Raymond C. Kwong, Michael G. Hack, Theodore Zhou, Julia J. Brown, Tan D. Ngo