Patents by Inventor Keizoh Watanabe

Keizoh Watanabe 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).

  • Publication number: 20120044446
    Abstract: The present invention provides: a vertical alignment liquid crystal display device using comb electrodes for voltage application to liquid crystals, the device being capable of reducing alignment defects of liquid crystals occurring at tips of electrodes, having a high contrast and white brightness, and being excellent in display properties; and a method for producing the same.
    Type: Application
    Filed: January 20, 2010
    Publication date: February 23, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yoshihito Hara, Yukinobu Nakata, Keizoh Watanabe
  • Patent number: 6965422
    Abstract: A first substrate includes, on one side thereof that is closer to a liquid crystal layer, a picture element electrode provided for each picture element region, a switching element, and a bus line. A second substrate includes a counter electrode opposing the picture element electrode. The picture element electrode includes a plurality of openings and a solid portion that includes a plurality of unit solid portions. In each picture element region, the liquid crystal layer takes a vertical alignment in the absence of an applied voltage, and forms a plurality of liquid crystal domains, each of which takes a radially-inclined orientation, in the plurality of openings and the solid portion by inclined electric fields produced at respective edge portions of the plurality of openings of the picture element electrode in response to an applied voltage.
    Type: Grant
    Filed: December 2, 2002
    Date of Patent: November 15, 2005
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masumi Kubo, Kiyoshi Ogishima, Takashi Ochi, Keizoh Watanabe
  • Publication number: 20030107695
    Abstract: A first substrate includes, on one side thereof that is closer to a liquid crystal layer, a picture element electrode provided for each picture element region, a switching element, and a bus line. A second substrate includes a counter electrode opposing the picture element electrode. The picture element electrode includes a plurality of openings and a solid portion that includes a plurality of unit solid portions. In each picture element region, the liquid crystal layer takes a vertical alignment in the absence of an applied voltage, and forms a plurality of liquid crystal domains, each of which takes a radially-inclined orientation, in the plurality of openings and the solid portion by inclined electric fields produced at respective edge portions of the plurality of openings of the picture element electrode in response to an applied voltage.
    Type: Application
    Filed: December 2, 2002
    Publication date: June 12, 2003
    Inventors: Masumi Kubo, Kiyoshi Ogishima, Takashi Ochi, Keizoh Watanabe