Patents by Inventor Shigekazu Tsuda

Shigekazu Tsuda 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).

  • Transparent screen and projection display apparatus
    Patent number: 7075718
    Abstract: A transparent screen includes a refraction/total reflection plate in a form of a Fresnel lens, the refraction/total reflection plate having a sawtooth surface upon which light is incident and another surface via which the light exits, and an image formation/display plate for forming a projection image from the light that exits from the refraction/total reflection plate. Refraction slating surface portions each for refracting incident light towards the other surface of the refraction/total reflection plate, transmission slating surface portions each for making incident light pass therethrough, and total reflection slating surface portions each for reflecting incident light passing through one transmission slating surface portion towards the other surface of the refraction/total reflection plate being formed concentrically on the sawtooth surface of the refraction/total reflection plate.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: July 11, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Suzuki, Takao Endo, Shinsuke Shikama, Shuso Wadaka, Kohei Teramoto, Kuniko Kojima, Shigekazu Tsuda
  • Transparent screen and projection display apparatus
    Publication number: 20050105177
    Abstract: A transparent screen is provided with a refraction/total reflection plate in a form of a Fresnel lens, the refraction/total reflection plate having a sawtooth light-incidence-side surface upon which light to be projected is incident, and a light-emitting-side surface via which the light to be projected exits, and an image formation/display plate for forming a projection image from the light that exits from the refraction/total reflection plate.
    Type: Application
    Filed: November 26, 2002
    Publication date: May 19, 2005
    Inventors: Hiroshi Suzuki, Takao Endo, Shinsuke Shikama, Shuso Wadaka, Kohei Teramoto, Kuniko Kojima, Shigekazu Tsuda