Patents by Inventor Jong-Bok Choi

Jong-Bok Choi 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).

  • Optical film composite for brightness enhancement including a birefringent polymer layer
    Patent number: 8547637
    Abstract: The present invention provides an optical film composite that includes a linear, reflective polarizing film; a first polymeric substrate layer having birefringence, which is placed on the reflective polarizing film; and a second polymeric substrate layer placed beneath the reflective polarizing film, wherein the optical axis of the first polymeric substrate layer is oriented with respect to the transmission axis of the reflective polarizing film to have of 0° to 25° of an angular difference between the axes. The optical film composite can be employed in LCD devices to improve optical performance.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: October 1, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Seo-Hern Lee, Myeong-Kyun Kang, Jong-Bok Choi, Yeon-Shin Kim, Byoung-Kyu Kim, Jong-Seo Lee, Chi-Deuk Kim, Dong-Won Chae, Kang-Il Seo
  • 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