Patents by Inventor Etsuo Nakazato

Etsuo Nakazato 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).

  • Liquid crystal display and light guide plate
    Patent number: 8130340
    Abstract: A large liquid crystal display (100) comprises a light guide plate (3) arranged on the back side of a liquid crystal panel (1). The front surface of the light guide plate (3) is flat, while the back surface thereof is concave. The upper and lower end faces of the light guide plate (3) respectively facing hot cathode fluorescent lamps (2a, 2b) have a convex shape projecting toward the respective lamps. White light from the fluorescent lamps is incident on the upper and lower end faces of the light guide plate directly or by being reflected by reflectors (4a, 4b), and propagates within the light guide plate while being reflected by the front and back surfaces of the light guide plate. At the front surface of the light guide plate, a part of the white light is directed toward the back side of the liquid crystal panel (1) by a light guide portion (5).
    Type: Grant
    Filed: August 14, 2006
    Date of Patent: March 6, 2012
    Assignees: Tohoku University, Kuraray Co., Ltd., Sharp Corporation
    Inventors: Tadahiro Ohmi, Yasuyuki Shirai, Kiwamu Takehisa, Mitsuo Matsumoto, Tokuo Ikari, Toshiaki Sato, Ikuo Onishi, Etsuo Nakazato, Yuichiro Yamada, Tokihiko Shinomiya, Takashi Ishizumi, Yuhsaku Ajichi
  • Method for producing optical sheet
    Patent number: 7919021
    Abstract: The present invention aims at providing a manufacturing method for an optical sheet capable of manufacturing a thin optical sheet of a uniform thickness distribution with a high thickness accuracy, and high shaping/transferring performances, and an optical sheet manufactured by using the manufacturing method. A manufacturing method for an optical sheet according to the present invention includes passing a resin discharged from a die between a touch roll and a shaping roll under pressure.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: April 5, 2011
    Assignee: Kuraray Co., Ltd.
    Inventors: Kazuo Baba, Kazunori Hirose, Yoshihiro Oda, Etsuo Nakazato, Ichiro Matsuzaki
  • Liquid crystal display and light guide plate
    Publication number: 20090103009
    Abstract: A large liquid crystal display (100) comprises a light guide plate (3) arranged on the back side of a liquid crystal panel (1). The front surface of the light guide plate (3) is flat, while the back surface thereof is concave. The upper and lower end faces of the light guide plate (3) respectively facing hot cathode fluorescent lamps (2a, 2b) have a convex shape projecting toward the respective lamps. White light from the fluorescent lamps is incident on the upper and lower end faces of the light guide plate directly or by being reflected by reflectors (4a, 4b), and propagates within the light guide plate while being reflected by the front and back surfaces of the light guide plate. At the front surface of the light guide plate, a part of the white light is directed toward the back side of the liquid crystal panel (1) by a light guide portion (5).
    Type: Application
    Filed: August 14, 2006
    Publication date: April 23, 2009
    Inventors: Tadahiro Ohmi, Yasuyuki Shirai, Kiwamu Takehisa, Mitsuo Matsumoto, Tokuo Ikari, Toshiaki Sato, Ikuo Onishi, Etsuo Nakazato, Yuichiro Yamada, Tokihiko Shinomiya, Takashi Ishizumi, Yuhsaku Ajichi
  • Method for producing optical sheet, optical sheet, and method for producing lenticular lens sheet
    Publication number: 20060145374
    Abstract: The present invention aims at providing a manufacturing method for an optical sheet capable of manufacturing a thin optical sheet of a uniform thickness distribution with a high thickness accuracy, and high shaping/transferring performances, and an optical sheet manufactured by using the manufacturing method. A manufacturing method for an optical sheet according to the present invention includes passing a resin discharged from a die between a touch roll and a shaping roll under pressure.
    Type: Application
    Filed: March 3, 2004
    Publication date: July 6, 2006
    Applicant: Kuraray Co., Ltd.
    Inventors: Kazuo Baba, Kazunori Hirose, Etsuo Nakazato, Ichiro Matsuzaki
  • Method for manufacturing ethylene-vinyl acetate copolymer and apparatus for manufacturing the same
    Patent number: 6777505
    Abstract: The present invention provides a method for manufacturing an ethylene-vinyl acetate that includes: (a) introducing an ethylene containing gas and a vinyl acetate containing liquid into a heat exchanger, said gas including ethylene vaporized from a polymerization solution; (b) bringing said gas into contact with said liquid in the heat exchanger so as to dissolve at least a portion of the ethylene in said gas into said liquid; and (c) introducing said liquid from the heat exchanger into the polymerization solution. In this method, the ethylene containing gas and the vinyl acetate containing liquid flow in parallel with each other in the heat exchanger.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: August 17, 2004
    Assignee: Kuraray Co., Ltd.
    Inventors: Masato Takai, Etsuo Nakazato, Kouichi Takahashi, Yoichi Matsumoto, Masahiro Igaki, Takaharu Kawahara, Nobutoshi Wada
  • Method for manufacturing ethylene-vinyl acetate copolymer and apparatus for manufacturing the same
    Publication number: 20020176812
    Abstract: The present invention provides a method for manufacturing an ethylene-vinyl acetate that includes:
    Type: Application
    Filed: March 15, 2002
    Publication date: November 28, 2002
    Applicant: KURARAY CO., LTD.
    Inventors: Masato Takai, Etsuo Nakazato, Kouichi Takahashi, Yoichi Matsumoto, Masahiro Igaki, Takaharu Kawahara, Nobutoshi Wada