Patents by Inventor Hironori HASHIGUCHI

Hironori HASHIGUCHI 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, AREA LIGHT SOURCE DEVICE, DISPLAY DEVICE, MANUFACTURING METHOD FOR LIGHT GUIDE PLATE
    Publication number: 20240077665
    Abstract: Provided are a light guide plate, an area light source device, a display device, and manufacturing method for the light guide plate such that the occurrence of uneven luminance is suppressed. The light guide plate is characterized in that the light guide plate has a light entrance surface through which light enters, a light exit surface intersecting with the light entrance surface and through which light is output, and an opposite surface facing the light entrance surface, wherein the light entering through the light entrance surface is guided to the opposite surface side and output from the light exit surface, and the refractive index Nx in a direction perpendicular to the light entrance surface is higher than the refractive index Ny in a direction parallel to the light exit surface and parallel to the light entrance surface.
    Type: Application
    Filed: November 8, 2023
    Publication date: March 7, 2024
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Kohei KOMIZO, Tetsuya SADAHIRO, Hironori HASHIGUCHI, Koujiro OHKAWA
  • LIGHT-GUIDE PLATE, AREA LIGHT SOURCE DEVICE, DISPLAY DEVICE, MANUFACTURING METHOD FOR LIGHT GUIDE PLATE
    Publication number: 20230055455
    Abstract: Provided are a light guide plate, an area light source device, a display device, and manufacturing method for the light guide plate such that the occurrence of uneven luminance is suppressed. The light guide plate is characterized in that the light guide plate has a light entrance surface through which light enters, a light exit surface intersecting with the light entrance surface and through which light is output, and an opposite surface facing the light entrance surface, wherein the light entering through the light entrance surface is guided to the opposite surface side and output from the light exit surface, and the refractive index Nx in a direction perpendicular to the light entrance surface is higher than the refractive index Ny in a direction parallel to the light exit surface and parallel to the light entrance surface.
    Type: Application
    Filed: October 13, 2022
    Publication date: February 23, 2023
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Kohei KOMIZO, Tetsuya SADAHIRO, Hironori HASHIGUCHI, Koujiro OHKAWA
  • Light-guide plate, area light source device, display device, manufacturing method for light guide plate
    Patent number: 11513276
    Abstract: Provided are a light guide plate, an area light source device, a display device, and manufacturing method for the light guide plate such that the occurrence of uneven luminance is suppressed. The light guide plate (12) is characterized in that the light guide plate has a light entrance surface (12a) through which light enters, a light exit surface (12c) intersecting with the light entrance surface (12a) and through which light is output, and an opposite surface (12b) facing the light entrance surface (12a), wherein the light entering through the light entrance surface (12a) is guided to the opposite surface (12b) side and output from the light exit surface (12c), and the refractive index Nx in a direction perpendicular to the light entrance surface (12a) is higher than the refractive index Ny in a direction parallel to the light exit surface (12c) and parallel to the light entrance surface (12a).
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: November 29, 2022
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Kohei Komizo, Tetsuya Sadahiro, Hironori Hashiguchi, Koujiro Ohkawa
  • LIGHT-GUIDE PLATE, AREA LIGHT SOURCE DEVICE, DISPLAY DEVICE, MANUFACTURING METHOD FOR LIGHT GUIDE PLATE
    Publication number: 20210088710
    Abstract: Provided are a light guide plate, an area light source device, a display device, and manufacturing method for the light guide plate such that the occurrence of uneven luminance is suppressed. The light guide plate (12) is characterized in that the light guide plate has a light entrance surface (12a) through which light enters, a light exit surface (12c) intersecting with the light entrance surface (12a) and through which light is output, and an opposite surface (12b) facing the light entrance surface (12a), wherein the light entering through the light entrance surface (12a) is guided to the opposite surface (12b) side and output from the light exit surface (12c), and the refractive index Nx in a direction perpendicular to the light entrance surface (12a) is higher than the refractive index Ny in a direction parallel to the light exit surface (12c) and parallel to the light entrance surface (12a).
    Type: Application
    Filed: April 16, 2018
    Publication date: March 25, 2021
    Applicant: Dai Nippon Printing Co., Ltd.
    Inventors: Kohei KOMIZO, Tetsuya SADAHIRO, Hironori HASHIGUCHI, Koujiro OHKAWA