Patents by Inventor Akihiko Kohgami

Akihiko Kohgami 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: 5818064
    Abstract: A method and apparatus is provided for picking up and displaying a stereoscopic image from an object permeated with radioactive rays. A plurality of radioactive rays which are non-parallel with each other are directed substantially simultaneously onto an object to generate a plurality of superimposed images of the object. The superimposed images of the object are divided into a plurality of discrete partial images formed on a pickup surface, so that each point of the object will be included in a plurality of the partial images, with the partial images showing the same point being spatially separated from one another on the pickup surface. A stereoscopic image of the object is then reconstructed by processing the partial images so that partial images generated by each of the sources of the radioactive rays will be respectively used to generate separate images of the object to form the stereoscopic image of the object.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: October 6, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Akihiko Kohgami, Tadaaki Hirai, Keiji Umetani
  • Patent number: 5583345
    Abstract: A method and apparatus is provided for picking up and displaying a stereoscopic image from an object permeated with radioactive rays. In accordance with the method, a plurality of radioactive rays which are non-parallel with each other are directed substantially simultaneously onto an object to generate a plurality of superimposed images of the object. The superimposed images of the object are divided into a plurality of discrete partial images formed on a pickup surface, so that each point of the object will be included in a plurality of the partial images, with the partial images showing the same point being spatially separated from one another on the pickup surface, A stereoscopic image of the object is then reconstructed by processing the partial images so that partial images generated by each of the sources of the radioactive rays will be respectively used to generate separate images of the object to form the stereoscopic image of the object.
    Type: Grant
    Filed: September 7, 1994
    Date of Patent: December 10, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Akihiko Kohgami, Tadaaki Hirai, Keiji Umetani
  • Patent number: 5187578
    Abstract: In a display device for pictures, etc., adequate brightness of pictures to be displayed is provided by varying the luminous times of the luminous elements making up the a display panel. The luminous elements receive multiple-bit codes representing levels of brightness from signals to be displayed. A time corresponding to a field of television signals is divided into a plurality of sub-fields corresponding to the bits of a multiple-bit code. The plurality of sub-fields have lengths of time proportional to weights of the corresponding bits. The luminous elements have different levels of brightness in sub-fields corresponding to bits of a multiple-bit binary code.
    Type: Grant
    Filed: July 6, 1992
    Date of Patent: February 16, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Akihiko Kohgami, Shigeo Mikoshiba, Shinichi Shinada, Mutsumi Suzuki