Patents by Inventor Mihoko Aoyama

Mihoko Aoyama 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).

  • Organic dispersion-type electroluminescence element having reflective insulating layer eliminating bad effects of impurities from inorganic high dielectric powder
    Patent number: 6007927
    Abstract: This invention provides an organic dispersion-type electroluminescence (abbreviated as "EL") element comprising a backing electrode, a reflective insulating layer, a luminescent layer, and a transparent electrode, wherein said reflective insulating layer comprises a high dielectric binder resin, an inorganic high dielectric material (i.e. powdery barium titanate), an impurity ion killer, and/or a hydrophobic hydrocarbon group-containing alkoxysilane compound, which is effective for inhibiting or preventing undesirable deterioration of dielectric properties and shortening of durability induced by the impurity ions present in the powdery barium titanate, and further a high dielectric graft polymer composition which is useful as a high dielectric binder resin used in the preparation of the reflective insulating layer and luminescent layer in said EL element.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: December 28, 1999
    Assignee: Sunstar Giken Kabushiki Kaisha
    Inventors: Satoshi Nishikawa, Mihoko Aoyama
  • High dielectric graft copolymer
    Patent number: 5777038
    Abstract: This invention provides an organic dispersion-type electroluminescence (abbreviated as "EL") element comprising a backing electrode, a reflective insulating layer, a luminescent layer, and a transparent electrode, wherein said reflective insulating layer comprises a high dielectric binder resin, an inorganic high dielectric material (i.e. powdery barium titanate), an impurity ion killer, and/or a hydrophobic hydrocarbon group-containing alkoxysilane compound, which is effective for inhibiting or preventing undesirable deterioration of dielectric properties and shortening of durability induced by the impurity ions present in the powdery barium titanate, and further a high dielectric graft polymer composition which is useful as a high dielectric binder resin used in the preparation of the reflective insulating layer and luminescent layer in said EL element.
    Type: Grant
    Filed: November 15, 1995
    Date of Patent: July 7, 1998
    Assignee: Sunstar Giken Kabushiki Kaisha
    Inventors: Satoshi Nishikawa, Mihoko Aoyama