Patents by Inventor Koji Ianiguchi

Koji Ianiguchi 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).

  • Thin film electroluminescence device
    Patent number: 4717858
    Abstract: A thin film electroluminescence device comprising an electrode layer, an emitting layer and an electrode layer formed on a substrate one over another, and an insulating layer optionally interposed between the three layers, the emitting layer being made of CaS serving as a host material and doped with Eu.sup.2+ providing luminescent centers.The emitting layer comprising a novel combination of host material and luminescent center produces a red electroluminescence with a high brightness.
    Type: Grant
    Filed: January 15, 1986
    Date of Patent: January 5, 1988
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koichi Tanaka, Takashi Ogura, Koji Ianiguchi, Akiyoshi Mikami, Masaru Yoshida