Patents by Inventor Koichi Kunikata

Koichi Kunikata 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).

  • Patent number: 7063450
    Abstract: An surface light emitting device that is capable of emitting light of high luminance with higher uniformity is disclosed. The surface light emitting device comprising; a light guide plate, a reflector on the under surface of the light guide plate and, an LED light source having at least one LED element and provided so that a light emitted by the LED element is incident on at least one end face of the light guide plate, wherein the light guide plate has a light diffusing portion on the one end face so that a light emitted from the LED light source enters the light guide plate while being diffused therein, and the light diffusing portion has the top end being space from the top surface.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: June 20, 2006
    Assignee: Nichia Corporation
    Inventors: Munetsugu Ehara, Hitoshi Nojiri, Eiji Nakanishi, Koichi Kunikata
  • Patent number: 6904225
    Abstract: An optical waveguide for emitting light of uniform intensity distributed over the light emitting surface so as to suppress the occurrences of bright lines includes an optical waveguide and surface light emitting apparatus that has a light emitting plane and a reflecting plane that oppose each other. The reflecting surface has a plurality of dots formed thereon so that light entering from the light source, provided on one end face or two opposing end faces, is output through the light emitting surface with uniform intensity, wherein the dots are arranged so as to form band regions each being defined as a region that has a constant density of distribution. A plurality of vertical lines of the dots are formed at substantially equal intervals in each of the band regions in the direction toward adjacent bands, and the interval between the vertical lines of dots is made different in different bands.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: June 7, 2005
    Assignee: Nichia Corporation
    Inventors: Yuuki Tamura, Koichi Kunikata, Nobutoshi Shiota, Eiji Nakanishi
  • Publication number: 20030214818
    Abstract: An surface light emitting device that is capable of emitting light of high luminance with higher uniformity is disclosed.
    Type: Application
    Filed: July 30, 2003
    Publication date: November 20, 2003
    Applicant: Nichia Corporation
    Inventors: Munetsugu Ehara, Hitoshi Nojiri, Eiji Nakanishi, Koichi Kunikata
  • Patent number: 6601962
    Abstract: An surface light emitting device that is capable of emitting light of high luminance with higher uniformity is disclosed. The surface light emitting device comprising; a light guide plate, a reflector on the under surface of the light guide plate and, an LED light source having at least one LED element and provided so that a light emitted by the LED element is incident on at least one end face of the light guide plate, wherein the light guide plate has a light diffusing portion on the one end face so that a light emitted from the LED light source enters the light guide plate while being diffused therein, and the light diffusing portion has the top end being space from the top surface.
    Type: Grant
    Filed: May 10, 2000
    Date of Patent: August 5, 2003
    Assignee: Nichia Corporation
    Inventors: Munetsugu Ehara, Hitoshi Nojiri, Eiji Nakanishi, Koichi Kunikata
  • Publication number: 20020197051
    Abstract: To provide an optical waveguide that can emit light of which intensity is uniformly distributed over the light emitting surface and can suppress the occurrence of the bright line, the optical waveguide of surface light emitting apparatus has a light emitting plane and a reflecting plane that oppose each other, the reflecting surface having a plurality of dots formed thereon so that light entering from a light source that is provided on one end face or two opposing end faces is output through the light emitting surface with uniform intensity, wherein the dots are arranged so as to form band regions each being defined as a region that has a constant density of distribution, a plurality of vertical lines of the dots are formed at substantially equal intervals in each of the band regions in the direction toward adjacent bands, and the interval between the vertical lines of dots is made different in different bands.
    Type: Application
    Filed: May 21, 2002
    Publication date: December 26, 2002
    Inventors: Yuuki Tamura, Koichi Kunikata, Nobutoshi Shiota, Eiji Nakanishi