Patents by Inventor Keiji Imoto

Keiji Imoto 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).

  • Vertically-alligned (VA) liquid crystal display device
    Patent number: 6661488
    Abstract: A vertically alignment mode liquid crystal display device having an improved viewing angle characteristic is disclosed. The disclosed liquid crystal display device uses a liquid crystal having a negative anisotropic dielectric constant, and orientations of the liquid crystal are vertical to substrates when no voltage being applied, almost horizontal when a predetermined voltage is applied, and oblique when an intermediate voltage is applied. At least one of the substrates includes a structure as domain regulating means, and inclined surfaces of the structure operate as a trigger to regulate azimuths of the oblique orientations of the liquid crystal when the intermediate voltage is applied.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: December 9, 2003
    Assignee: Fujitsu Limited
    Inventors: Arihiro Takeda, Katsufumi Ohmuro, Yoshio Koike, Shingo Kataoka, Takahiro Sasaki, Takashi Sasabayashi, Hideaki Tsuda, Hideo Chida, Makoto Ohashi, Kenji Okamoto, Hisashi Yamaguchi, Minoru Otani, Makoto Morishige, Noriaki Furukawa, Tsuyoshi Kamada, Yoshinori Tanaka, Atuyuki Hoshino, Shougo Hayashi, Hideaki Takizawa, Takeshi Kinjou, Makoto Tachibanaki, Keiji Imoto, Tadashi Hasegawa, Hidefumi Yoshida, Hiroyasu Inoue, Yoji Taniguchi, Tetsuya Fujikawa, Satoshi Murata, Manabu Sawasaki, Tomonori Tanose, Siro Hirota, Masahiro Ikeda, Kunihiro Tashiro, Kouji Tsukao, Yasutoshi Tasaka, Takatoshi Mayama, Seiji Tanuma, Yohei Nakanishi
  • LIQUID CRYSTAL DISPLAY DEVICE
    Publication number: 20020012089
    Abstract: A liquid crystal display panel comprises first and second substrates and a liquid crystal inserted therebetween. The first substrate has active elements, picture electrodes and a first alignment film, and the second substrate has a common electrode and a second alignment film. The first and second alignment films are treated such that the liquid crystal molecules adjacent to the alignment films are oriented in predetermined directions (by rubbing), and at least one of the first and second alignment films is at least partly treated such that its surface condition is changed in order to restrain movement of the liquid crystal molecules (by UV irradiation).
    Type: Application
    Filed: October 27, 1997
    Publication date: January 31, 2002
    Inventors: HIROYASU INOUE, KEIJI IMOTO