Patents by Inventor Natsuka Sakai

Natsuka Sakai 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).

  • Optical sheet, and backlight unit and display using the same
    Patent number: 7553059
    Abstract: In an optical sheet which is used for light control illumination in a backlight unit for a display, in order from an incident side of an illuminating light, there are provided at least a light scattering layer which scatters the illuminating light toward an outgoing surface side, an adhesion layer or an adhesive layer, a light reflection layer which reflects light scattered by the light scattering layer toward the light scattering layer side, and a lens sheet whose flat rear face is fixed to the other side of the light reflection layer, and in which a plurality of unit lenses are disposed on the surface. Opening portions corresponding to the respective unit lenses one-to-one are provided to the light reflection layer, and thickness of the adhesion layer or the adhesive layer is thinner than that of the light reflection layer.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: June 30, 2009
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Kenjiro Kuroda, Mitsuru Endo, Natsuka Sakai, Godai Fukunaga, Tomohiro Nakagome, Yoshiaki Shiina, Luis Manuel Murillo-Mora
  • Optical sheet, and backlight unit and display using the same
    Patent number: 7374328
    Abstract: In an optical sheet which is used for light control illumination in a backlight unit for a display, in order from an incident side of an illuminating light, there are provided at least a light scattering layer which scatters the illuminating light toward an outgoing surface side, an adhesion layer or an adhesive layer, a light reflection layer which reflects light scattered by the light scattering layer toward the light scattering layer side, and a lens sheet whose flat rear face is fixed to the other side of the light reflection layer, and in which a plurality of unit lenses are disposed on the surface. Opening portions corresponding to the respective unit lenses one-to-one are provided to the light reflection layer, and thickness of the adhesion layer or the adhesive layer is thinner than that of the light reflection layer.
    Type: Grant
    Filed: June 6, 2007
    Date of Patent: May 20, 2008
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Kenjiro Kuroda, Mitsuru Endo, Natsuka Sakai, Godai Fukunaga, Tomohiro Nakagome, Yoshiaki Shiina, Luis Manuel Murillo-Mora
  • Optical Sheet, and Backlight Unit and Display Using the Same
    Publication number: 20080055929
    Abstract: In an optical sheet which is used for light control illumination in a backlight unit for a display, in order from an incident side of an illuminating light, there are provided at least a light scattering layer which scatters the illuminating light toward an outgoing surface side, an adhesion layer or an adhesive layer, a light reflection layer which reflects light scattered by the light scattering layer toward the light scattering layer side, and a lens sheet whose flat rear face is fixed to the other side of the light reflection layer, and in which a plurality of unit lenses are disposed on the surface. Opening portions corresponding to the respective unit lenses one-to-one are provided to the light reflection layer, and thickness of the adhesion layer or the adhesive layer is thinner than that of the light reflection layer.
    Type: Application
    Filed: October 26, 2007
    Publication date: March 6, 2008
    Applicant: Toppan Printing Co., Ltd.
    Inventors: Kenjiro Kuroda, Mitsuru Endo, Natsuka Sakai, Godai Fukunaga, Tomohiro Nakagome, Yoshiaki Shiina, Luis Murillo-Mora
  • Optical sheet, and backlight unit and display using the same
    Publication number: 20070236940
    Abstract: In an optical sheet which is used for light control illumination in a backlight unit for a display, in order from an incident side of an illuminating light, there are provided at least a light scattering layer which scatters the illuminating light toward an outgoing surface side, an adhesion layer or an adhesive layer, a light reflection layer which reflects light scattered by the light scattering layer toward the light scattering layer side, and a lens sheet whose flat rear face is fixed to the other side of the light reflection layer, and in which a plurality of unit lenses are disposed on the surface. Opening portions corresponding to the respective unit lenses one-to-one are provided to the light reflection layer, and thickness of the adhesion layer or the adhesive layer is thinner than that of the light reflection layer.
    Type: Application
    Filed: June 6, 2007
    Publication date: October 11, 2007
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Kenjiro Kuroda, Mitsuru Endo, Natsuka Sakai, Godai Fukunaga, Tomohiro Nakagome, Yoshiaki Shiina, Luis Murillo-Mora