Patents by Inventor Sung ok Cheun

Sung ok Cheun 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).

  • LCOS panel assembly of projection system and image matching method having quarter wave plate holder rotatably supported about panel support by respectively slots and protrusions
    Patent number: 7450193
    Abstract: There is provided a LCOS panel assembly of a projection system comprising: a LCOS panel; a panel support supporting the LCOS panel and coupled to the quad side; a quarter-wave plate provided at the front side of the LCOS panel to polarize light; a quarter-wave plate holder rotatably supported about the panel support at a state where the quarter-wave plate is coupled thereto; and adhesives interposed on a contact surface of the quarter-wave plate holder and the panel support, so that foreign substance is prevented from being injected on a optical path of the LCOS panel assembly of the projection system or image matching is prevented from being deteriorated.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: November 11, 2008
    Assignee: LG Electronics Inc.
    Inventors: Ju Wan Seok, Sung ok Cheun, Moung Youb Lee