Patents by Inventor Yoshitomo Kumai

Yoshitomo Kumai 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).

  • Publication number: 20080303987
    Abstract: A polarizing device includes: a polarizing device unit composed of a metallic film formed on a base, the metallic film having a plurality of slit-shaped openings; and an etching sacrifice layer provided between the base and the polarizing device unit, so that the etching sacrifice layer is partly etched together with the metallic film during the etching of the polarizing device unit; wherein the etching sacrifice layer is composed of a material that has an etching rate equal to or greater than that of the metallic film.
    Type: Application
    Filed: June 4, 2008
    Publication date: December 11, 2008
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Yoshitomo KUMAI
  • Publication number: 20080218670
    Abstract: A liquid crystal device of semi-transmissive reflective type includes a first substrate and a second substrate opposed to each other, a liquid crystal layer interposed therebetween, a pixel region having a reflection display region and a transmission display region, a first electrode having a plurality of strip electrode portions electrically connected to each other, a second electrode provided in the first substrate and facing the first electrode to produce an electric field between the first and the second electrodes, an electrode insulating film interposed between the first and the second electrodes, the electrodes and the electrode insulating film being arranged in a side of the first substrate toward the liquid crystal layer, a reflective polarizing layer for selectively reflecting a predetermined polarized light component of incident light, a light scatterer for scattering reflected light, and a layer for adjusting a thickness of the liquid crystal layer to make the thickness thereof in a light-scattere
    Type: Application
    Filed: December 4, 2007
    Publication date: September 11, 2008
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Yoshitomo KUMAI
  • Publication number: 20080218665
    Abstract: A polarizing element manufacturing method includes (a) forming a plurality of fine metal wires by forming a metal film on a substrate and patterning the metal film, (b) applying, onto a base material, a glass precursor solution for forming a protective layer for protecting the fine metal wires, (c) placing the substrate on the base material so that ends of the fine metal wires are immersed in the glass precursor solution, and (d) forming the protective layer by drying the glass precursor solution, and bonding together the base material and the substrate with the protective layer therebetween.
    Type: Application
    Filed: February 19, 2008
    Publication date: September 11, 2008
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Huiping ZHANG, Yoshitomo KUMAI
  • Publication number: 20080137010
    Abstract: A polarizing element includes a polarizing element member formed on a substrate and composed of a metal film that has a slit-shaped opening, the opening being provided in a plural number, a coating film formed on the polarizing element member and a space surrounded by the coating film, the substrate and the metal film.
    Type: Application
    Filed: December 5, 2007
    Publication date: June 12, 2008
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Yoshitomo KUMAI
  • Publication number: 20060185983
    Abstract: A method for manufacturing an optical element having a metal wire grid containing a plurality of metal wires on a substrate includes forming the metal wire grid using an electrolytic plating process.
    Type: Application
    Filed: February 14, 2006
    Publication date: August 24, 2006
    Inventors: Yoshitomo Kumai, Daisuke Sawaki
  • Publication number: 20060177571
    Abstract: A method for manufacturing an optical element having a metal wire grid containing a plurality of metal wires on a substrate includes forming the metal wire grid with an LSP (Liquid Self-patterning Process).
    Type: Application
    Filed: February 6, 2006
    Publication date: August 10, 2006
    Inventors: Yoshitomo Kumai, Daisuke Sawaki