Patents by Inventor Tomo Dobashi

Tomo Dobashi 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 film and surface light source using it
    Patent number: 7672051
    Abstract: An optical film 10 has a transparent base film 11 made of polyethylene terephthalate (PET), a prism made of photo-curing resin such as acryl modified epoxy on an incident surface 12 that is one face of the base film 11, and a hologram similarly made of photo-curing resin on an exit surface 13 opposing the incident surface 12. The prism has grooves or ridges each having a substantially triangular cross section to totally reflect incident light so as to bend the light into a direction perpendicular to the exit surface 13. The hologram anisotropically diffuses light exiting from the exit surface 13, to improve brightness.
    Type: Grant
    Filed: May 21, 2004
    Date of Patent: March 2, 2010
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Tetsuya Hoshino, Yasushi Sugimoto, Teruo Teshima, Tomo Dobashi
  • Optical film and surface light source using it
    Publication number: 20070064294
    Abstract: An optical film 10 has a transparent base film 11 made of polyethylene terephthalate (PET), a prism made of photo-curing resin such as acryl modified epoxy on an incident surface 12 that is one face of the base film 11, and a hologram similarly made of photo-curing resin on an exit surface 13 opposing the incident surface 12. The prism has grooves or ridges each having a substantially triangular cross section to totally reflect incident light so as to bend the light into a direction perpendicular to the exit surface 13. The hologram anisotropically diffuses light exiting from the exit surface 13, to improve brightness.
    Type: Application
    Filed: May 21, 2004
    Publication date: March 22, 2007
    Inventors: Tetsuya Hoshino, Yasushi Sugimoto, Teruo Teshima, Tomo Dobashi