Patents by Inventor Hiroshi Katayanagi

Hiroshi Katayanagi 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
    Publication number: 20010024183
    Abstract: A liquid crystal display device including a liquid crystal panel having a plurality of pixels, a driving circuit applying a video signal voltage to each of the pixels in accordance with display data. The driving circuit has a first circuit, a second circuit, and a switching circuit which connects an output terminal of the first circuit with an input terminal of the second circuit. The first circuit outputs a first voltage and a second voltage in accordance with first display data, and outputs the second voltage and a third voltage in accordance with second display data. The second voltage is lower than the first voltage, and the third voltage is lower than the second voltage.
    Type: Application
    Filed: May 11, 2001
    Publication date: September 27, 2001
    Inventors: Yukihide Ode, Akira Ogura, Kentaro Agata, Kazunari Kurokawa, Takahiro Fujioka, Hiroshi Katayanagi, Mitsuru Goto
  • Liquid crystal display device
    Patent number: 6232941
    Abstract: A liquid crystal display device is capable of generating gradation voltages for multilevel gradation, such as 256-level gradation, without increasing the chip size of video signal line driving means.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: May 15, 2001
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Yukihide Ode, Akira Ogura, Kentaro Agata, Kazunari Kurokawa, Takahiro Fujioka, Hiroshi Katayanagi, Mitsuru Goto