Patents by Inventor Kenji Okishiro

Kenji Okishiro 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: 20060033860
    Abstract: An object of the present invention is to provide a moving picture displayable liquid crystal display device capable of attaining satisfactory moving picture characteristics, color reproducibility and reliability at the same time.
    Type: Application
    Filed: June 17, 2005
    Publication date: February 16, 2006
    Inventors: Kenji Okishiro, Shin Imamura, Masatoshi Shiiki
  • Patent number: 6967637
    Abstract: A liquid crystal display apparatus including: a first substrate; a second substrate arranged opposite the first substrate; and a liquid crystal layer held between the first substrate and the second substrate; further provided with a plurality of scanning lines arranged over the first substrate; signal lines arranged over the first substrate to cross the scanning lines; pixels each composed matching an area surrounded by the scanning lines and the signal lines; pixel electrodes arranged over the first substrate and matching the signal lines; and common electrodes arranged over the first substrate and matching the pixel electrodes, wherein at least either of the first substrate and the second substrate is provided with unevenness to vary the thickness of the liquid crystal layer in the light-transmissive regions of the same ones of the pixels.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: November 22, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Tetsuya Aoyama, Kenji Okishiro, Katsumi Kondou, Tsunenori Yamamoto, Shinichi Komura
  • Patent number: 6943861
    Abstract: A liquid crystal display device having a pair of substrates, at least one of the substrates being transparent, a liquid crystal layer interposed between the pair of substrates, and pixel electrodes and common electrodes and active elements being arranged on at least one substrate between the pair of substrates. The liquid crystal of the liquid crystal layer is controlled to perform display by applying a voltage between the pixel electrode and the common electrode. An alignment layer is disposed on a surface in contact with the liquid crystal layer of each of the pair of substrates, and the alignment layer is made of an organic polymer selected from the group consisting of polyamic acid group polymers and polyimide ester group polymers having a relative imidization ratio above 60%.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: September 13, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Yasushi Tomioka, Kenji Okishiro, Yoshiyuki Umeda, Hitoshi Oaku, Katsumi Kondo
  • Publication number: 20040165132
    Abstract: A liquid crystal display device having a pair of substrates, at least one of the substrates being transparent, a liquid crystal layer interposed between the pair of substrates, and pixel electrodes and common electrodes and active elements being arranged on at least one substrate between the pair of substrates. The liquid crystal of the liquid crystal layer is controlled to perform display by applying a voltage between the pixel electrode and the common electrode. An alignment layer is disposed on a surface in contact with the liquid crystal layer of each of the pair of substrates, and the alignment layer is made of an organic polymer selected from the group consisting of polyamic acid group polymers and polyimide ester group polymers having a relative imidization ratio above 60%.
    Type: Application
    Filed: March 2, 2004
    Publication date: August 26, 2004
    Inventors: Yasushi Tomioka, Kenji Okishiro, Yoshiyuki Umeda, Hitoshi Oaku, Katsumi Kondo
  • Patent number: 6704082
    Abstract: A liquid crystal display device has a pair of substrates, at least one of the substrates being transparent; a liquid crystal layer interposed between the pair of substrates; and pixel electrodes and common electrodes and active elements arranged on at least one substrate between the pair of substrates, wherein a pair of alignment layers are made of an organic polymer of polyamic acid group of polyamide ester group having a relative imidization ration above 60%; or at least one layer of an insulation film is interposed between the alignment layer in a side of the substrate having the group of electrodes formed thereon, and the pixel electrode and the common electrode disposed under the alignment layer to prevent occurrence of the sticking image and the after image by flattening the electrode portions to moderate the electric field concentration.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: March 9, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Yasushi Tomioka, Kenji Okishiro, Yoshiyuki Umeda, Hitoshi Oaku, Katsumi Kondo
  • Patent number: 6704085
    Abstract: A liquid crystal display apparatus which has a large pixel aperture ratio, a high luminance and good yield without causing any signal delay on wiring or increasing any driving voltage. In a structure in which a capacity is formed on a superimposed part of a common signal electrode CE and at least one of a data signal wiring DL and a scanning signal wiring GL via an interlayer insulating film PAS, of insulating films included in the interlayer insulating film PAS, at least a layer OIL1 is selectively formed at least on a part of a region on a pixel electrode PX.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: March 9, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Etsuko Nishimura, Makoto Abe, Masatoshi Wakagi, Ken-ichi Onisawa, Kenji Okishiro, Yoshiaki Nakayoshi, Masahiro Ishii, Junji Tanno
  • Publication number: 20030052847
    Abstract: To provide a high-quality liquid crystal display device that does not produce an image sticking and that can realize high response speed.
    Type: Application
    Filed: March 20, 2002
    Publication date: March 20, 2003
    Inventors: Kenji Okishiro, Hitoshi Oaku, Ikuo Hiyama, Katsumi Kondou
  • Publication number: 20030043327
    Abstract: A liquid crystal display apparatus including: a first substrate; a second substrate arrange opposite the first substrate; a liquid crystal layer held between the first substrate and the second substrate; a plurality of scanning lines arranged over the first substrate; a plurality of zigzag-shaped signal lines having bent portions, arranged crossing the scanning lines over the substrate; insulating films arranged over at least part of the signal lines; pixel electrodes matching the signal lines; and common electrodes matching the pixel electrodes and superposed over at least part of the signal lines via the insulating films, in which the bent portions of the zigzag-shaped signal lines are curved.
    Type: Application
    Filed: March 15, 2002
    Publication date: March 6, 2003
    Inventors: Tetsuya Aoyama, Kenji Okishiro, Etsuko Nishimura, Shinichi Komura, Katsumi Kondou
  • Publication number: 20030043098
    Abstract: A liquid crystal display apparatus including: a first substrate; a second substrate arranged opposite the first substrate; and a liquid crystal layer held between the first substrate and the second substrate; further provided with a plurality of scanning lines arranged over the first substrate; signal lines arranged over the first substrate to cross the scanning lines; pixels each composed matching an area surrounded by the scanning lines and the signal lines; pixel electrodes arranged over the first substrate and matching the signal lines; and common electrodes arranged over the first substrate and matching the pixel electrodes, wherein at least either of the first substrate and the second substrate is provided with unevenness to vary the thickness of the liquid crystal layer in the light-transmissive regions of the same ones of the pixels.
    Type: Application
    Filed: May 21, 2002
    Publication date: March 6, 2003
    Inventors: Tetsuya Aoyama, Kenji Okishiro, Katsumi Kondou, Tsunenori Yamamoto, Shinichi Komura
  • Publication number: 20020149729
    Abstract: A liquid crystal display apparatus which has a large pixel aperture ratio, a high luminance and good yield without causing any signal delay on wiring or increasing any driving voltage. In a structure in which a capacity is formed on a superimposed part of a common signal electrode CE and at least one of a data signal wiring DL and a scanning signal wiring GL via an interlayer insulating film PAS, of insulating films included in the interlayer insulating film PAS, at least a layer OIL1 is selectively formed at least on a part of a region on a pixel electrode PX.
    Type: Application
    Filed: August 31, 2001
    Publication date: October 17, 2002
    Inventors: Etsuko Nishimura, Makoto Abe, Masatoshi Wakagi, Ken-ichi Onisawa, Kenji Okishiro, Yoshiaki Nakayoshi, Masahiro Ishii, Junji Tanno
  • Publication number: 20010048498
    Abstract: In a liquid crystal display device of IPS mode, occurrence of a sticking-image and after-image phenomenon is prevented.
    Type: Application
    Filed: February 9, 2001
    Publication date: December 6, 2001
    Inventors: Yasushi Tomioka, Kenji Okishiro, Yoshiyuki Umeda, Hitoshi Oaku, Katsumi Kondo