Patents by Inventor Mizuho Tajima

Mizuho Tajima 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: 5298986
    Abstract: An apparatus receptive of illumination light from an illumination light source for providing a color image on a projection lens includes three displays responsive to a video signal for modulating incident lights to display respective component images, a first dichroic layer for separating the illumination light into a first component light and a first mixed light of different wavelength regions to give the first component light to one of the displays, a second dichroic layer for separating the mixed light into second and third component lights of different wavelength regions to give the second and third component lights to other two of the displays respectively, a third dichroic layer for synthesizing, out of the first, second and third information lights from the displays, the first and second information light, and a fourth dichroic layer for further synthesizing the light synthesized by the third dichroic layer with the third information light.
    Type: Grant
    Filed: February 3, 1993
    Date of Patent: March 29, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Mitsuru Owada, Mizuho Tajima, Yoshitake Nagashima
  • Patent number: 4989076
    Abstract: An apparatus for receiving the illumination light from an illumination light souce and for providing a color image on a projection lens includes three displays responsive to a video signal for modulating incident light to display respective component images. Also included are a first dichroic layer for separating the illumination light into a first light component and a first mixed light of different wavelengths to transmit the first light component to one of the displays, a second dichroic layer for separating the mixed light into second and third light component of different wavelengths to transmit the second and third light component to the other two of the displays, respectively, a third dichroic layer for combining the first and second information lights from the first two displays, and a fourth dichroic layer for further combining the information light combined by the third dichroic layer with a third information light from the third display.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: January 29, 1991
    Assignee: Canon Kabushiki Kaisha
    Inventors: Mitsuru Owada, Mizuho Tajima, Yoshitake Nagashima