Patents by Inventor Syoichi Yoshii

Syoichi Yoshii 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).

  • Rear projection display device
    Patent number: 7329004
    Abstract: A rear projection display device improves the brightness by improving the utilization efficiency of image light projected to a screen from slantly below. At least a green component of the image light is P-polarized to the screen (7). Therefore, reflection of light on the screen (7) is reduced.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: February 12, 2008
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kazuhiro Arai, Syoichi Yoshii
  • Rear projection display device
    Patent number: 7264357
    Abstract: A rear projection display device improves the brightness by improving the utilization efficiency of image light projected to a screen from slantly below. At least a green component of the image light is P-polarized to the screen (7). Therefore, reflection of light on the screen (7) is reduced.
    Type: Grant
    Filed: August 8, 2006
    Date of Patent: September 4, 2007
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kazuhiro Arai, Syoichi Yoshii
  • Rear projection display device
    Publication number: 20060285082
    Abstract: A rear projection display device improves the brightness by improving the utilization efficiency of image light projected to a screen from slantly below. At least a green component of the image light is P-polarized to the screen (7). Therefore, reflection of light on the screen (7) is reduced.
    Type: Application
    Filed: August 8, 2006
    Publication date: December 21, 2006
    Inventors: Kazuhiro Arai, Syoichi Yoshii
  • Rear projection display device
    Publication number: 20060038963
    Abstract: A rear projection display device improves the brightness by improving the utilization efficiency of image light projected to a screen from slantly below. At least a green component of the image light is P-polarized to the screen (7). Therefore, reflection of light on the screen (7) is reduced.
    Type: Application
    Filed: August 5, 2005
    Publication date: February 23, 2006
    Inventors: Kazuhiro Arai, Syoichi Yoshii
  • Rear projection display device
    Patent number: 6981771
    Abstract: A rear projection display device improves the brightness by improving the utilization efficiency of image light projected to a screen from slantly below. At least a green component of the image light is P-polarized to the screen (7). Therefore, reflection of light on the screen (7) is reduced.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: January 3, 2006
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kazuhiro Arai, Syoichi Yoshii
  • Rear surface projection type display device
    Patent number: 6752500
    Abstract: A rear projection display device capable of reducing the depth of a display device itself, comprising an optical engine, first, second, third reflective mirrors arranged at such positions as to be easily held integrally with each other, a fourth reflective mirror, a plane reflective mirror for turn-back of light flux, and a screen.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: June 22, 2004
    Assignee: Sanyo Electric Co., LTD
    Inventors: Syoichi Yoshii, Takahiro Totani, Hideyuki Kanayama, Kenji Tateishi