Patents by Inventor Ikuo Nakazawa

Ikuo Nakazawa 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).

  • Mesomorphic compound liquid crystal composition containing the compound, liquid crystal device using the composition, display apparatus and display method
    Patent number: 5580488
    Abstract: An optically inactive mesomorphic compound of the formula (I) according to claim 1 characterized by having a terminal group of: --A.sub.3 --C.sub.r F.sub.2r+1, where A.sub.3 is a specific cyclic group and r is 2-18, is suitable as a component for a liquid crystal composition providing improved response characteristics and a high contrast. A liquid crystal device is constituted by disposing the liquid crystal composition between a pair of electrode plates. The liquid crystal device is used as a display panel constituting a display apparatus (or display method) providing good display characteristics.
    Type: Grant
    Filed: May 17, 1994
    Date of Patent: December 3, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinichi Nakamura, Takao Takiguchi, Takashi Iwaki, Takeshi Togano, Yoko Yamada, Ikuo Nakazawa
  • Quinoxaline compound, liquid crystal composition containing the compound, liquid crystal device using the composition, display apparatus and display method
    Patent number: 5512209
    Abstract: A quinoxaline compound of the formula (I) according to claim 1 characterized by having at least one quinoxaline-2,6 (or 2,7)-diyl group is suitable as a component for a liquid crystal composition providing improved response characteristics and a high contrast. A liquid crystal device is constituted by disposing the liquid crystal composition between a pair of electrode plates. The liquid crystal device is used as a display panel constituting a display apparatus providing good display characteristics.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: April 30, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takao Takiguchi, Takashi Iwaki, Takeshi Togano, Yoko Yamada, Shinichi Nakamura, Ikuo Nakazawa
  • Mesomorphic compound, liquid crystal composition containing the compound, liquid crystal device using the composition, liquid crystal apparatus and display method
    Patent number: 5462694
    Abstract: A mesomorphic compound of the formula (I) according to claim 1 characterized by having at least one cyclic group selected from .beta. class including, e.g., thiazole-2,5-diyl, benzoxazole-2,5-diyl, indan-2,5-diyl, and quinoxaline-2,6-diyl and also having a linkage of Y.sup.1 (CH.sub.2).sub.m Y.sup.2, where Y.sup.1 and Y.sup.2 are --CH.sub.2 --, --O--, --COO-- or --OCO-- and m is 1-16, is suitable as a component for a liquid crystal composition providing improved response characteristics. A liquid crystal device is constituted by disposing the liquid crystal composition between a pair of substrates. The liquid crystal device is used as a display panel constituting a liquid crystal apparatus providing good display characteristics.
    Type: Grant
    Filed: August 30, 1994
    Date of Patent: October 31, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoko Kosaka, Takao Takiguchi, Takashi Iwaki, Takeshi Togano, Shinichi Nakamura, Ikuo Nakazawa