Patents by Inventor Youngduck Seo

Youngduck Seo 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).

  • CIRCULAR POLARIZER COMPOSITE AND AN OPTICAL SYSTEM COMPRISING THE SAME
    Publication number: 20100002296
    Abstract: A circular polarizer composite including a plane polarizer, a first quarter-wavelength retarder, a cholesteric liquid crystal (CLC) film and a second quarter-wavelength retarder, wherein optical axes of the first quarter-wavelength retarder and the second quarter-wavelength retarder are perpendicularly crossed to each other. Also disclosed is an optical system including the circular polarizer composite and an emissive display module.
    Type: Application
    Filed: May 25, 2007
    Publication date: January 7, 2010
    Inventors: Jong-Bok Choi, Seo-Hem Lee, Yeon-Shin Kim, Youngsoo Park, Yeong-Yeon Seo, Youngduck Seo