Patents by Inventor Yosihide Nagata

Yosihide Nagata 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).

  • Light guide plate, surface-emitting apparatus, liquid crystal display apparatus, and method of producing a light guide plate
    Patent number: 8749729
    Abstract: A light guide plate includes a light-emitting surface, a light-reflecting surface opposed to the light-emitting surface, and a light-incident surface including a protrusion formed continuously along an edge portion of the light-emitting surface. Accordingly, light that has entered the protrusion is transmitted through the protrusion and totally reflected on an inner surface of the light-emitting surface to thus propagate inside the light guide plate. As described above, since incident light components emitted toward an upper portion of the light-incident surface can be effectively blocked by the protrusion, luminance distribution characteristics as well as a light use efficiency can be improved. The light guide plate is produced by a punching press process.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: June 10, 2014
    Assignee: Sony Corporation
    Inventors: Jun Sasaki, Yasuyuki Kudo, Makoto Aoki, Yosihide Nagata, Mariko Fukuda, Masahiro Ochiai
  • LIGHT GUIDE PLATE, SURFACE-EMITTING APPARATUS, LIQUID CRYSTAL DISPLAY APPARATUS, AND METHOD OF PRODUCING A LIGHT GUIDE PLATE
    Publication number: 20100214509
    Abstract: A light guide plate includes a light-emitting surface, a light-reflecting surface opposed to the light-emitting surface, and a light-incident surface including a protrusion formed continuously along an edge portion of the light-emitting surface. Accordingly, light that has entered the protrusion is transmitted through the protrusion and totally reflected on an inner surface of the light-emitting surface to thus propagate inside the light guide plate. As described above, since incident light components emitted toward an upper portion of the light-incident surface can be effectively blocked by the protrusion, luminance distribution characteristics as well as a light use efficiency can be improved. The light guide plate is produced by a punching press process.
    Type: Application
    Filed: February 6, 2009
    Publication date: August 26, 2010
    Applicant: SONY CORPORATION
    Inventors: Jun Sasaki, Yasuyuki Kudo, Makoto Aoki, Yosihide Nagata, Mariko Fukuda, Masahiro Ochiai