Patents by Inventor Hidehiko Ohkura

Hidehiko Ohkura 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).

  • Liquid crystal display device
    Patent number: 7403248
    Abstract: The liquid crystal display device of the invention includes: a liquid crystal layer taking on a roughly vertically aligned state in the black display state: first and second polarizing plates placed to face each other so that the transmission axes are orthogonal to each other; at least one first phase plate placed between the liquid crystal layer and the first polarizing plate and/or the second polarizing plate; at least one second phase plate placed between the first phase plate and the first or second polarizing plate whichever is farther from the first phase plate; and an illuminator for illuminating the liquid crystal layer with light via the first or second polarizing plate.
    Type: Grant
    Filed: March 3, 2003
    Date of Patent: July 22, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshihisa Uchida, Koichi Miyachi, Masumi Kubo, Nobuhiko Nakai, Hidehiko Ohkura
  • Liquid crystal display device
    Publication number: 20030169391
    Abstract: The liquid crystal display device of the invention includes: a liquid crystal layer taking on a roughly vertically aligned state in the black display state: first and second polarizing plates placed to face each other so that the transmission axes are orthogonal to each other; at least one first phase plate placed between the liquid crystal layer and the first polarizing plate and/or the second polarizing plate; at least one second phase plate placed between the first phase plate and the first or second polarizing plate whichever is farther from the first phase plate; and an illuminator for illuminating the liquid crystal layer with light via the first or second polarizing plate.
    Type: Application
    Filed: March 3, 2003
    Publication date: September 11, 2003
    Inventors: Toshihisa Uchida, Koichi Miyachi, Masumi Kubo, Nobuhiko Nakai, Hidehiko Ohkura