Patents by Inventor Nozomu Bitou

Nozomu Bitou 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).

  • Planar lighting device
    Patent number: 6767105
    Abstract: A simple and inexpensive planar lighting device realizing a high luminance is provided, including: a light guide plate having a pair of opposite light entry faces, a light emitting face extending perpendicularly to the light entry faces, a plurality of hemispherical surfaces formed on the light emitting face, and a light non-emitting face opposite to the light emitting face; a light source disposed to extend along each of the light entry faces; a reflector for reflecting light from the light source toward a respective one of the light entry faces; a reflecting plate disposed to extend along the light non-emitting face for reflecting light leaking from the light guide plate toward the light guide plate; and a lens sheet disposed to extend along the light emitting face and formed with a plurality of first ridges extending parallel with the light entry faces on a face thereof opposite to the light emitting face, the first ridges each having a triangular section.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: July 27, 2004
    Assignees: Nissen Chemitec Corporation, Nippon Chemitec Corporation
    Inventors: Sumio Nakahashi, Hirozumi Taguchi, Nozomu Bitou, Masaya Suzuki
  • Planar lighting device
    Publication number: 20030021123
    Abstract: A simple and inexpensive planar lighting device realizing a high luminance is provided, including: a light guide plate having a pair of opposite light entry faces, a light emitting face extending perpendicularly to the light entry faces, a plurality of hemispherical surfaces formed on the light emitting face, and a light non-emitting face opposite to the light emitting face; a light source disposed to extend along each of the light entry faces; a reflector for reflecting light from the light source toward a respective one of the light entry faces; a reflecting plate disposed to extend along the light non-emitting face for reflecting light leaking from the light guide plate toward the light guide plate; and a lens sheet disposed to extend along the light emitting face and formed with a plurality of first ridges extending parallel with the light entry faces on a face thereof opposite to the light emitting face, the first ridges each having a triangular section.
    Type: Application
    Filed: July 26, 2002
    Publication date: January 30, 2003
    Applicant: Nissen Chemitec Corporation
    Inventors: Sumio Nakahashi, Hirozumi Taguchi, Nozomu Bitou, Masaya Suzuki