Patents by Inventor Takemi Akimoto

Takemi Akimoto 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 device having a phase plate and particular dye composition
    Patent number: 5134506
    Abstract: An ingenious STN type liquid crystal device having a layer of phase film and comprising a liquid crystal composition that contains a two-color pigment as additive for compensation of the color of the device per se is disclosed. Such a device has a clear black and white display effect and can be manufactured at a low cost. Moreover, since only a small amount of pigment is used as additive, the original drive characteristics, contrast and brightness of the device is not adversely affected by the pigment.
    Type: Grant
    Filed: November 22, 1989
    Date of Patent: July 28, 1992
    Assignee: Alps Electric Co., Ltd.
    Inventors: Mitsuru Kano, Takemi Akimoto
  • Electroluminescent device having a liquid crystal layer adjacent to the electroluminescent layer without any electrode placed therebetween
    Patent number: 5115329
    Abstract: A electroluminescence device has a light emitting layer composed of a fluorescent powder and a liquid crystal between a transparent substrate formed with a transparent electrode and an insulating substrate formed with an opposed electrode.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: May 19, 1992
    Assignee: Alps Electric Co., Ltd.
    Inventors: Masami Ikarashi, Kenichi Mitsumori, Mitsuru Kano, Yasuhiro Miki, Takemi Akimoto, Masahiko Yamaguchi, Yorihiko Sasaki, Tomoo Kamigaki, Jun Nakanowatari, Yoshinori Kato, Hitoshi Seki