Patents Assigned to Hitachi, Ltd., and Hitachi Video and Information Systems, Inc.
  • Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same
    Patent number: 7152978
    Abstract: A liquid crystal projector comprises an illuminating optical system including a light source, a color separating optical system for separating illuminating light rays emitted by the illuminating optical system into light rays of three colors, a projection lens unit comprising a projection lens, a cross dichroic prism disposed near a light receiving end of the projection lens, and a plurality of liquid crystal panels arranged around the cross dichroic prism, and a light source power supply for supplying power to the light source. The projection lens unit, the color separating optical system, the illuminating optical system and the light source power supply are arranged in that order. The liquid crystal projector has an outside size in a horizontal plane of 263 mm by 318 mm or below. The liquid crystal panels have a display screen size of 0.9 in. A cooling fan for cooling the plurality of liquid crystal panels is disposed beside the projection lens.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: December 26, 2006
    Assignee: Hitachi, Ltd., and Hitachi Video and Information Systems, Inc.
    Inventors: Nobuhiko Konuma, Hidetomo Yoshimura, Seiichi Sekiguchi, Mikiharu Kuwata, Masaharu Deguchi, Takashi Kakuda, Yutaka Matsuda, Takuya Shiaki, Futoshi Yamasaki, Atsushi Ishibashi, Koichi Umezawa, Takeshi Hoshino, Shigehisa Hagura, Makoto Fukatsu, Nobuyuki Kaku, Kenji Fuse, Satoshi Ohuchi, Tomohiro Miyoshi, Naohiro Ozawa, Masahiko Yatsu, Yasuo Otsuka, Takesuke Maruyama
  • Magnetic recording/reproducing apparatus and the same equiped with an image sensor
    Publication number: 20010002945
    Abstract: A magnetic recording/reproducing apparatus equipped with an image sensor, comprising:
    Type: Application
    Filed: February 1, 2001
    Publication date: June 7, 2001
    Applicant: Hitachi Ltd. and Hitachi Video and Information System, Inc.
    Inventors: Katsuyuki Watanabe, Hideo Nishijima, Koichi Ono, Akihito Nishizawa, Kazuaki Hori