Patents by Inventor Naohiro Konuma

Naohiro Konuma 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 liquid crystal display device
    Patent number: 6351295
    Abstract: A projection type liquid crystal display device using liquid crystal display elements, which has a light source; illumination optics having a function of irradiating a plane to be irradiated with light emitted by the light source; and liquid crystal display elements modulating light; projection optics for projecting light exiting from the liquid crystal display elements; wherein the illumination optics include at least an elliptic mirror and a spherical mirror, and the illumination optics include further a first lens array and a second lens array, in which a plurality of lenses are arranged perpendicularly to an optical axis, from the light source side; and a condenser lens for irradiating the liquid crystal display elements with light after exit from the second lens array with a high efficiency. In this way it is possible to realize a bright projection type liquid crystal display device having a small size and a good image quality performance.
    Type: Grant
    Filed: December 4, 2000
    Date of Patent: February 26, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Kakuda, Masaharu Deguchi, Futoshi Yamasaki, Takesuke Maruyama, Naohiro Konuma, Yutaka Matsuda
  • Projection type liquid crystal display device
    Patent number: 6307601
    Abstract: A projection type liquid crystal display device using liquid crystal display elements, which has a light source; illumination optics having a function of irradiating a plane to be irradiated with light emitted by the light source; and liquid crystal display elements modulating light; projection optics for projecting light exiting from the liquid crystal display elements; wherein the illumination optics include at least an elliptic mirror and a spherical mirror, and the illumination optics include further a first lens array and a second lens array, in which a plurality of lenses are arranged perpendicularly to an optical axis, from the light source side; and a condenser lens for irradiating the liquid crystal display elements with light after exit from the second lens array with a high efficiency. In this way it is possible to realize a bright projection type liquid crystal display device having a small size and a good image quality performance.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: October 23, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Kakuda, Masaharu Deguchi, Futoshi Yamasaki, Takesuke Maruyama, Naohiro Konuma, Yutaka Matsuda
  • Projection type liquid crystal display device
    Publication number: 20010000056
    Abstract: A projection type liquid crystal display device using liquid crystal display elements, which has a light source; illumination optics having a function of irradiating a plane to be irradiated with light emitted by the light source; and liquid crystal display elements modulating light; projection optics for projecting light exiting from the liquid crystal display elements; wherein the illumination optics include at least an elliptic mirror and a spherical mirror, and the illumination optics include further a first lens array and a second lens array, in which a plurality of lenses are arranged perpendicularly to an optical axis, from the light source side; and a condenser lens for irradiating the liquid crystal display elements with light after exit from the second lens array with a high efficiency. In this way it is possible to realize a bright projection type liquid crystal display device having a small size and a good image quality performance.
    Type: Application
    Filed: December 4, 2000
    Publication date: March 22, 2001
    Inventors: Takashi Kakuda, Masaharu Deguchi, Futoshi Yamasaki, Takesuke Maruyama, Naohiro Konuma, Yutaka Matsuda