Patents by Inventor Syoichi Hirota

Syoichi Hirota 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).

  • Patent number: 6373547
    Abstract: A method for forming a liquid crystal display device includes forming a metal film over a drive substrate, and patterning the metal film to form at least one pixel electrode and an optical shield film. The optical shield film is provided outside of a pixel electrode area and has a width greater than a width of each of the pixel electrode. A resin is deposited over the patterned metal film, and the resin is patterned to form at least one pole spacer and strip spacer. The strip spacer surrounds the pixel electrode area and has a width greater than a diameter of each of pole spacer. Liquid crystal material is supplied into an inside space which is surrounded by the strip spacer, and a sealing material is filled at outer edges of the strip spacer for fixing the drive substrate and a common substrate.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: April 16, 2002
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Katsutoshi Saito, Syoichi Hirota, Iwao Takemoto, Toshio Miyazawa, Katsumi Matsumoto
  • Publication number: 20010052960
    Abstract: A method for forming a liquid crystal display device includes forming a metal film over a drive substrate, and patterning the metal film to form at least one pixel electrode and an optical shield film. The optical shield film is provided outside of a pixel electrode area and has a width greater than a width of each of the pixel electrode. A resin is deposited over the patterned metal film, and the resin is patterned to form at least one pole spacer and strip spacer. The strip spacer surrounds the pixel electrode area and has a width greater than a diameter of each of pole spacer. Liquid crystal material is supplied into an inside space which is surrounded by the strip spacer, and a sealing material is filled at outer edges of the strip spacer for fixing the drive substrate and a common substrate.
    Type: Application
    Filed: July 25, 2001
    Publication date: December 20, 2001
    Inventors: Katsutoshi Saito, Syoichi Hirota, Iwao Takemoto, Toshio Miyazawa, Katsumi Matsumoto
  • Patent number: 6304308
    Abstract: Eliminating differences in cell gap of a liquid crystal panel is effected to prevent display irregularities while avoiding contamination of the liquid crystal material due to unwanted contact of a seal material with the liquid crystal material. To this end, the liquid crystal panel includes a first substrate DSUB having multiple pixel electrodes AL-P in the form of a matrix, a second substrate USUB opposing the first substrate with a specified gap therebetween and having one or more transparent electrodes ITO-C, a liquid crystal layer LC made of a liquid crystal material sealed in the gap between the opposing substrates, and an alignment film on at least one of inner surfaces of the first and second substrates in contact with the liquid crystal layer for controlling alignment of the liquid crystal material.
    Type: Grant
    Filed: August 9, 1999
    Date of Patent: October 16, 2001
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Katsutoshi Saito, Syoichi Hirota, Iwao Takemoto, Toshio Miyazawa, Katsumi Matsumoto