Patents by Inventor Koujiro Tsubota

Koujiro Tsubota 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).

  • Method for producing an LCD having no spacers in the display area in which heating alleviates cell distortion or greater pressure is applied to the seal region
    Patent number: 5677749
    Abstract: A liquid crystal display device including a first substrate, a second substrate, and a sealing member for bonding the first and the second substrates, wherein a spacer for determining a thickness of a gap between the first and the second substrates is included only in the sealing member and wherein d<D where D is the thickness of the gap and d is the thickness of the sealing member. The gap is filled with a liquid crystal.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: October 14, 1997
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koujiro Tsubota, Kazuyoshi Fujioka, Yohji Yoshimura, Hiroyuki Ohgami, Yutaka Takafuji, Katsumi Nomura, Masumi Kubo, Hirokazu Kamei
  • Method for producing an LCD by pressing the substrates
    Patent number: 5629787
    Abstract: A liquid crystal display device including a first substrate, a second substrate, and a sealing member for bonding the first and the second substrates, wherein a spacer for determining a thickness of a gap between the first and the second substrates is included only in the sealing member and wherein d<D where D is the thickness of the gap and d is the thickness of the sealing member. The gap is filled with a liquid crystal.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: May 13, 1997
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koujiro Tsubota, Kazuyoshi Fujioka, Yohji Yoshimura, Hiroyuki Ohgami, Yutaka Takafuji, Katsumi Nomura, Masumi Kubo, Hirokazu Kamei
  • Method of making a liquid crystal display device by measuring the liquid crystal layer thickness and adjusting
    Patent number: 5568297
    Abstract: A liquid crystal display device including a first substrate, a second substrate, and a sealing member for bonding the first and the second substrates, wherein a spacer for determining a thickness of a gap between the first and the second substrates is included only in the sealing member and wherein d<D where D is the thickness of the gap and d is the thickness of the sealing member. The gap is filled with a liquid crystal.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: October 22, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koujiro Tsubota, Kazuyoshi Fujioka, Yohji Yoshimura, Hiroyuki Ohgami, Yutaka Takafuji
  • Liquid crystal display device having a larger gap between the substrates in the display area than in the sealant area
    Patent number: 5499127
    Abstract: A liquid crystal display device including a first substrate, a second substrate, and a sealing member for bonding the first and the second substrates, wherein a spacer for determining a thickness of a gap between the first and the second substrates is included only in the sealing member and wherein d<D where D is the thickness of the gap and d is the thickness of the sealing member. The gap is filled with a liquid crystal.
    Type: Grant
    Filed: May 25, 1993
    Date of Patent: March 12, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koujiro Tsubota, Kazuyohsi Fujioka, Yohji Yoshimura, Hiroyuki Ohgami, Yutaka Takafuji, Katsumi Nomura, Masumi Kubo, Hirokazu Kamei
  • Liquid crystal display having a light blocking film on stepped portions
    Patent number: 5426523
    Abstract: An active matrix substrate is disclosed. The active matrix substrate of the invention includes: a plurality of scanning lines; a plurality of signal lines which cross the plurality of scanning lines; a plurality of picture element electrodes formed in regions defined by the plurality of scanning lines and the plurality of signal lines, respectively, part of each of the plurality of picture element electrodes overlapping at least one of the scanning lines and the signal lines adjacent to the picture element electrode; and a light blocking film covering the line.
    Type: Grant
    Filed: May 10, 1993
    Date of Patent: June 20, 1995
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takayuki Shimada, Koujiro Tsubota, Yasuhiro Matsushima