Patents by Inventor Yasuhisa Watabe

Yasuhisa Watabe 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).

  • Projection type image display apparatus
    Patent number: 8109642
    Abstract: A projection type image display apparatus comprising a light source, an optical integrator, by which light outgoing from the light source is changed in distribution of illumination, a color separation optical system, by which light outgoing from the optical integrator is separated into a plurality of light beams, and a relay optical system including a plurality of relay lenses, by which light beams separated by the color separation optical system are relayed, and a reflection mirror. The relay optical system includes a device that adjusts angles of inclination of at least one of the relay lenses with respect to an optical axis of illumination of light outgoing from the light source.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: February 7, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Yasuhisa Watabe, Nobuyuki Kimura, Yoshimasa Takeuchi, Shinro Inui
  • Projection Type Image Display Apparatus
    Publication number: 20090141254
    Abstract: A projection type image display apparatus comprising a light source, an optical integrator, by which light outgoing from the light source is changed in distribution of illumination, a color separation optical system, by which light outgoing from the optical integrator is separated into a plurality of light beams, and a relay optical system including a plurality of relay lenses, by which light beams separated by the color separation optical system are relayed, and a reflection mirror. The relay optical system includes a device that adjusts angles of inclination of at least one of the relay lenses with respect to an optical axis of illumination of light outgoing from the light source.
    Type: Application
    Filed: November 7, 2008
    Publication date: June 4, 2009
    Inventors: Yasuhisa WATABE, Nobuyuki Kimura, Yoshimasa Takeuchi, Shinro Inui