Patents by Inventor Toru Tsukamoto

Toru Tsukamoto 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: 8711319
    Abstract: A liquid crystal display device restraining display defects even in a structure having a potential difference between an externally-connected electrode potential and the mean potential of the drive waveform of a liquid crystal material. An electrostatic charge stored in the vicinity of a liquid crystal layer of the liquid crystal display device as a result of the potential difference between an externally-connected electrode potential and the mean potential of the drive waveform of the liquid crystal material is dispersed by employing a capacitor or an arrester connected to ground. Accordingly, discharge of the stored charge is facilitated, and occurrence of display defects is restrained.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: April 29, 2014
    Assignee: Optrex Corporation
    Inventors: Shigeru Kojima, Yutaka Nakagawa, Toru Tsukamoto, Kenji Gondo
  • LIQUID CRYSTAL DISPLAY DEVICE
    Publication number: 20110261310
    Abstract: A liquid crystal display device restraining display defects even in a structure having a potential difference between an externally-connected electrode potential and the mean potential of the drive waveform of a liquid crystal material. An electrostatic charge stored in the vicinity of a liquid crystal layer of the liquid crystal display device as a result of the potential difference between an externally-connected electrode potential and the mean potential of the drive waveform of the liquid crystal material is dispersed by employing a capacitor or an arrester connected to ground. Accordingly, discharge of the stored charge is facilitated, and occurrence of display defects is restrained.
    Type: Application
    Filed: April 20, 2011
    Publication date: October 27, 2011
    Applicant: OPTREX CORPORATION
    Inventors: Shigeru Kojima, Yutaka Nakagawa, Toru Tsukamoto, Kenji Gondo