Patents by Inventor Kenichi Yuyama

Kenichi Yuyama 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 element, optical head device, and variable optical modulation element
    Patent number: 8300512
    Abstract: A liquid crystal element includes: a transparent substrate; and a liquid crystal layer including: a liquid crystal material; and a concavo-convex portion including periodic concaves and convexes, wherein the concavo-convex portion is aligned so that a longitudinal direction of liquid crystal molecules that are positioned on a side of the transparent substrate and on a concavo-convex surface that is an interface of the concavo-convex portion substantially becomes a vertical direction with respect to a concavo-convex surface on the side of the transparent substrate, or a longitudinal direction of liquid crystal molecules that are positioned on a side, in which a medium is disposed and which is opposite to the transparent substrate, and on the concavo-convex surface that is the interface of the concavo-convex portion substantially becomes the vertical direction with respect to a concavo-convex surface on the side, in which the medium is disposed, to form a diffraction grating.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: October 30, 2012
    Assignee: Asahi Glass Company, Limited
    Inventors: Yukihiro Tao, Kenichi Yuyama
  • LIQUID CRYSTAL ELEMENT, OPTICAL HEAD DEVICE, AND VARIABLE OPTICAL MODULATION ELEMENT
    Publication number: 20100260030
    Abstract: A liquid crystal element includes: a transparent substrate; and a liquid crystal layer including: a liquid crystal material; and a concavo-convex portion including periodic concaves and convexes, wherein the concavo-convex portion is aligned so that a longitudinal direction of liquid crystal molecules that are positioned on a side of the transparent substrate and on a concavo-convex surface that is an interface of the concavo-convex portion substantially becomes a vertical direction with respect to a concavo-convex surface on the side of the transparent substrate, or a longitudinal direction of liquid crystal molecules that are positioned on a side, in which a medium is disposed and which is opposite to the transparent substrate, and on the concavo-convex surface that is the interface of the concavo-convex portion substantially becomes the vertical direction with respect to a concavo-convex surface on the side, in which the medium is disposed, to form a diffraction grating.
    Type: Application
    Filed: June 25, 2010
    Publication date: October 14, 2010
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Yukihiro TAO, Kenichi Yuyama