Patents by Inventor Yuuichi Nishikouji

Yuuichi Nishikouji 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).

  • Patent number: 6330108
    Abstract: A composite retarder plate is a laminate including (A) at least one retarder layer made of a high-molecular film satisfying the relation nx>ny>nz, (B) at least one retarder layer satisfying the relation nx≧ny>nz and having an optical axis inclined relative to a direction of a normal line with respect to a plane of the layer, and (C) at least one retarder layer satisfying the relation nx>nz≧ny or nx>ny>nz when nx and ny are in-plane refractive indices and nz is a refractive index in a direction of thickness, wherein &Dgr;Nxy and Rth given by Nx≧Ny, (Nx−Ny)·D=&Dgr;Nxy and {(Nx+Ny)/2−Nz}·D=Rth and based on monochromatic light with a wavelength of 590 nm are in a range of from 25 to 100 nm and in a range of from 100 to 300 nm respectively when Nx and Ny are in-plane refractive indices in the laminate, Nz is a refractive index in a direction of thickness of the laminate and D is the thickness of the laminate.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: December 11, 2001
    Assignee: Nitto Denko Corporation
    Inventors: Yuuichi Nishikouji, Hiroyuki Yoshimi