Patents by Inventor Mitsuru Oki

Mitsuru Oki 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 display apparatus and multiscreen display apparatus
    Patent number: 7543944
    Abstract: The projection type display apparatus according to the present invention includes a light source (20), display devices (29, 34, 42) for forming an optical image by demodulating light from the light source in response to a drive voltage, a projection lens (15) for enlarging and projecting the optical image on the display device, a detector (5) for detecting the light from the projection lens, and a control circuit (11) for controlling the drive control in response to an output from the detector. The detector is arranged at a position close to an external periphery of a light flux emitted from the projection lens, and detects a portion of light from the projection lens (diffuse light) reaching outside of an effective area of a screen.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: June 9, 2009
    Assignee: Hitachi. Ltd.
    Inventors: Manabu Suginobu, Satoshi Shibuya, Mitsuru Oki
  • Projection-type display apparatus and multiscreen display apparatus
    Publication number: 20060158516
    Abstract: The projection type display apparatus according to the present invention includes a light source (20), display devices (29, 34, 42) for forming an optical image by demodulating light from the light source in response to a drive voltage, a projection lens (15) for enlarging and projecting the optical image on the display device, a detector (5) for detecting the light from the projection lens, and a control circuit (11) for controlling the drive control in response to an output from the detector. The detector is arranged at a position close to an external periphery of a light flux emitted from the projection lens, and detects a portion of light from the projection lens (diffuse light) reaching outside of an effective area of a screen.
    Type: Application
    Filed: December 21, 2005
    Publication date: July 20, 2006
    Inventors: Manabu Suginobu, Satoshi Shibuya, Mitsuru Oki