Patents by Inventor Tatsuo Hamamoto

Tatsuo Hamamoto 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: 9458048
    Abstract: A glass cutter is provided which can form, using a wheel, a uniform crack in glass even when a projection or an earlier-formed scribe line is present on the glass. When the wheel is moved on the glass, a fracture layer is formed causing a rib mark to be formed below the fracture layer and a crack to be formed below the rib mark. To cut the glass, the crack is required to be formed uniformly. Applying a force to resist the rotating force of the wheel makes it possible to form a uniform crack even when a projection is present on the glass. This improves glass cutting yield.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: October 4, 2016
    Assignees: Japan Display Inc., PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Susumu Sasaki, Katsunori Kuwaki, Makoto Tatemura, Hiroyuki Tani, Hitoshi Azuma, Tomio Yaguchi, Tatsuo Hamamoto, Hideaki Ishige, Shuji Iwasaki, Katsuyuu Takahashi
  • Publication number: 20150166398
    Abstract: A glass cutter is provided which can form, using a wheel, a uniform crack in glass even when a projection or an earlier-formed scribe line is present on the glass. When the wheel is moved on the glass, a fracture layer is formed causing a rib mark to be formed below the fracture layer and a crack to be formed below the rib mark. To cut the glass, the crack is required to be formed uniformly. Applying a force to resist the rotating force of the wheel makes it possible to form a uniform crack even when a projection is present on the glass. This improves glass cutting yield.
    Type: Application
    Filed: February 24, 2015
    Publication date: June 18, 2015
    Inventors: Susumu SASAKI, Katsunori KUWAKI, Makoto TATEMURA, Hiroyuki TANI, Hitoshi AZUMA, Tomio YAGUCHI, Tatsuo HAMAMOTO, Hideaki ISHIGE, Shuji IWASAKI, Katsuyuu TAKAHASHI
  • Patent number: 8997619
    Abstract: A glass cutter is provided which can form, using a wheel, a uniform crack in glass even when a projection or an earlier-formed scribe line is present on the glass. When the wheel is moved on the glass, a fracture layer is formed causing a rib mark to be formed below the fracture layer and a crack to be formed below the rib mark. To cut the glass, the crack is required to be formed uniformly. Applying a force to resist the rotating force of the wheel makes it possible to form a uniform crack even when a projection is present on the glass. This improves glass cutting yield.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: April 7, 2015
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Susumu Sasaki, Katsunori Kuwaki, Makoto Tatemura, Hiroyuki Tani, Hitoshi Azuma, Tomio Yaguchi, Tatsuo Hamamoto, Hideaki Ishige, Shuji Iwasaki, Katsuyuu Takahashi
  • Publication number: 20110314990
    Abstract: A glass cutter is provided which can form, using a wheel, a uniform crack in glass even when a projection or an earlier-formed scribe line is present on the glass. When the wheel is moved on the glass, a fracture layer is formed causing a rib mark to be formed below the fracture layer and a crack to be formed below the rib mark. To cut the glass, the crack is required to be formed uniformly. Applying a force to resist the rotating force of the wheel makes it possible to form a uniform crack even when a projection is present on the glass. This improves glass cutting yield.
    Type: Application
    Filed: June 23, 2011
    Publication date: December 29, 2011
    Inventors: Susumu SASAKI, Katsunori Kuwaki, Makoto Tatemura, Hiroyuki Tani, Hitoshi Azuma, Tomio Yaguchi, Tatsuo Hamamoto, Hideaki Ishige, Shuji Iwasaki, Katsuyuu Takahashi
  • Patent number: 7826028
    Abstract: In order to prevent irreversible deformation of column-shaped spacers which retain the gap between a pair of substrates between which the liquid crystal layer of a liquid crystal display device is interposed, spacers which assist in preventing such irreversible deformation are newly provided. According to the invention, two or more kinds of spacers which differ in height from a reference surface are disposed on one of the pair of substrates. In addition, a step pattern with which the spacers are to come into contact is formed in advance on the other of the pair of substrates so that the heights of the spacers can be made different.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: November 2, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Hiromasa Shimizu, Tatsuo Hamamoto
  • Publication number: 20100108409
    Abstract: A capacitive coupling type touch panel includes an XY-coordinate electrode configured to detect an XY-position coordinate. The XY-coordinate electrode is provided on a transparent substrate and detects a position inputted by capacitive coupling. The capacitive coupling type touch panel also includes an electrode provided at a position so as to be isolated from and opposed to the XY-coordinate electrode.
    Type: Application
    Filed: November 4, 2009
    Publication date: May 6, 2010
    Inventors: Jun Tanaka, Shinji Sekiguchi, Norio Mamba, Tatsuo Hamamoto
  • Patent number: 7456926
    Abstract: In order to prevent irreversible deformation of column-shaped spacers which retain the gap between a pair of substrates between which the liquid crystal layer of a liquid crystal display device is interposed, spacers which assist in preventing such irreversible deformation are newly provided. According to the invention, two or more kinds of spacers which differ in height from a reference surface are disposed on one of the pair of substrates. In addition, a step pattern with which the spacers are to come into contact is formed in advance on the other of the pair of substrates so that the heights of the spacers can be made different.
    Type: Grant
    Filed: October 3, 2006
    Date of Patent: November 25, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Hiromasa Shimizu, Tatsuo Hamamoto
  • Publication number: 20080266511
    Abstract: In order to prevent irreversible deformation of column-shaped spacers which retain the gap between a pair of substrates between which the liquid crystal layer of a liquid crystal display device is interposed, spacers which assist in preventing such irreversible deformation are newly provided. According to the invention, two or more kinds of spacers which differ in height from a reference surface are disposed on one of the pair of substrates. In addition, a step pattern with which the spacers are to come into contact is formed in advance on the other of the pair of substrates so that the heights of the spacers can be made different.
    Type: Application
    Filed: June 24, 2008
    Publication date: October 30, 2008
    Inventors: Hiromasa Shimizu, Tatsuo Hamamoto
  • Publication number: 20080180602
    Abstract: According to the invention, a semi-transmissive liquid crystal display device that achieves good brightness in both reflection mode and transmission mode is provided. In the invention, two cylindrical microlenses are formed at the backlight side of the TFT substrate dividing the area of the pixel into two, and further, another cylindrical microlens is formed which covers the whole pixel at the external light incident surface of the CF substrate.
    Type: Application
    Filed: February 8, 2008
    Publication date: July 31, 2008
    Inventor: Tatsuo Hamamoto
  • Publication number: 20070024797
    Abstract: In order to prevent irreversible deformation of column-shaped spacers which retain the gap between a pair of substrates between which the liquid crystal layer of a liquid crystal display device is interposed, spacers which assist in preventing such irreversible deformation are newly provided. According to the invention, two or more kinds of spacers which differ in height from a reference surface are disposed on one of the pair of substrates. In addition, a step pattern with which the spacers are to come into contact is formed in advance on the other of the pair of substrates so that the heights of the spacers can be made different.
    Type: Application
    Filed: October 3, 2006
    Publication date: February 1, 2007
    Inventors: Hiromasa Shimizu, Tatsuo Hamamoto
  • Patent number: 7133108
    Abstract: In order to prevent irreversible deformation of column-shaped spacers which retain the gap between a pair of substrates between which the liquid crystal layer of a liquid crystal display device is interposed, spacers which assist in preventing such irreversible deformation are newly provided. According to the invention, two or more kinds of spacers which differ in height from a reference surface are disposed on one of the pair of substrates. In addition, a step pattern with which the spacers are to come into contact is formed in advance on the other of the pair of substrates so that the heights of the spacers can be made different.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: November 7, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Hiromasa Shimizu, Tatsuo Hamamoto
  • Patent number: 6992738
    Abstract: In a liquid crystal display device includes a pair of substrates between which a liquid crystal layer filled, a plurality of pixel regions each of which includes a pixel electrode and an active element connected to the pixel electrode on a main surface of one of the pair of substrates, the present invention provides a first electrode layer electrically connected to the active element, a color filter layer formed over the first electrode layer and having an opening portion, and a second electrode layer covering the color filter layer, and utilizes the second electrode layer as the pixel electrode by connecting the second electrode layer to the first electrode layer electrically through the opening portion of the color filter layer.
    Type: Grant
    Filed: July 14, 2003
    Date of Patent: January 31, 2006
    Assignee: Hitachi Displays, Ltd.
    Inventors: Katsuyoshi Ishihara, Tatsuo Hamamoto
  • Patent number: 6853416
    Abstract: In a liquid crystal display device comprising color filters therein, the present invention provides a color-converting material in at least one of the color filters which converts a part of an incident light of the at least one of the color filters into a light in a specific wavalength range together with a filter material passing the light in the specific wavelength range, so as to prevent deterioration of color purity of the light emitted thereby and to improve efficiency of optical utilization therein.
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: February 8, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Tatsuo Hamamoto, Yoshifumi Tomita, Tomoaki Tsuboka, Minoru Hiroshima
  • Publication number: 20040051829
    Abstract: In a liquid crystal display device includes a pair of substrates between which a liquid crystal layer filled, a plurality of pixel regions each of which includes a pixel electrode and an active element connected to the pixel electrode on a main surface of one of the pair of substrates, the present invention provides a first electrode layer electrically connected to the active element, a color filter layer formed over the first electrode layer and having an opening portion, and a second electrode layer covering the color filter layer, and utilizes the second electrode layer as the pixel electrode by connecting the second electrode layer to the first electrode layer electrically through the opening portion of the color filter layer.
    Type: Application
    Filed: July 14, 2003
    Publication date: March 18, 2004
    Inventors: Katsuyoshi Ishihara, Tatsuo Hamamoto
  • Patent number: 6705584
    Abstract: In a liquid crystal display device comprising a first substrate having switching elements formed for respective pixel electrodes thereon and a second substrate having color filters and a common electrode formed on a main surface thereof, the present invention provides a plurality of columnar spacers formed on both areas of the second substrate inside and outside the common electrode, covers a group of the columnar spacers formed on the common electrode with an alignment film, and arranges another group of the columnar spacers formed around the common electrode at both sides of a sealing material sticking the first substrate and the second substrate to one another. According to the present invention, the group of the columnar spacers fixed to the second substrate with the alignment film firmly secures a gap between the first and second substrates in cooperation with the another group of the columnar spacers arranged so as to compensate for deformation of the sealing material.
    Type: Grant
    Filed: June 24, 2002
    Date of Patent: March 16, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Minoru Hiroshima, Tatsuo Hamamoto, Hironobu Yamada
  • Publication number: 20030025868
    Abstract: In a liquid crystal display device comprising a first substrate having switching elements formed for respective pixel electrodes thereon and a second substrate having color filters and a common electrode formed on a main surface thereof, the present invention provides a plurality of columnar spacers formed on both areas of the second substrate inside and outside the common electrode, covers a group of the columnar spacers formed on the common electrode with an alignment film, and arranges another group of the columnar spacers formed around the common electrode at both sides of a sealing material sticking the first substrate and the second substrate to one another. According to the present invention, the group of the columnar spacers fixed to the second substrate with the alignment film firmly secures a gap between the first and second substrates in cooperation with the another group of the columnar spacers arranged so as to compensate for deformation of the sealing material.
    Type: Application
    Filed: June 24, 2002
    Publication date: February 6, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Minoru Hiroshima, Tatsuo Hamamoto, Hironobu Yamada
  • Publication number: 20020075443
    Abstract: In order to prevent irreversible deformation of column-shaped spacers which retain the gap between a pair of substrates between which the liquid crystal layer of a liquid crystal display device is interposed, spacers which assist in preventing such irreversible deformation are newly provided. According to the invention, two or more kinds of spacers which differ in height from a reference surface are disposed on one of the pair of substrates. In addition, a step pattern with which the spacers are to come into contact is formed in advance on the other of the pair of substrates so that the heights of the spacers can be made different.
    Type: Application
    Filed: December 7, 2001
    Publication date: June 20, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Hiromasa Shimizu, Tatsuo Hamamoto
  • Patent number: 6392729
    Abstract: Disclosed are a liquid crystal display device capable of obtaining preferable display images, whose manufacturing cost is low, and which does not deteriorate the environment at the time of fabrication and a method for fabricating the same.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: May 21, 2002
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Akiya Izumi, Masao Yoshioka, Tatsuo Hamamoto, Norimasa Akiyama
  • Publication number: 20020011971
    Abstract: In a liquid crystal display device comprising color filters therein, the present invention provides a color-converting material in at least one of the color filters which converts a part of an incident light of the at least one of the color filters into a light in a specific wavalength range together with a filter material passing the light in the specific wavelength range, so as to prevent deterioration of color purity of the light emitted thereby and to improve efficiency of optical utilization therein.
    Type: Application
    Filed: July 17, 2001
    Publication date: January 31, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Tatsuo Hamamoto, Yoshifumi Tomita, Tomoaki Tsuboka, Minoru Hiroshima
  • Patent number: 4975871
    Abstract: According to one embodiment of the present invention, a magnetic bubble memory module comprising a flexible printed circuits substrate (FPC3), on which a magnetic bubble memory chip (CHI) is mounted and electrically connected, with interconnecting patterns (9a) electrically connecting the chip (CHI) with external connecting leads, terminals or pins as well as bias coil winding (BIC2) for applying bias field to the chip (CHI), thereby reducing the number of components as well as fabricating steps because of the formation of the bias coil (BIC2) with the printed circuits substrate (FPC3).
    Type: Grant
    Filed: July 7, 1988
    Date of Patent: December 4, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Yutaka Akiba, Kazuo Hirota, Nobuo Kishiro, Toshio Futami, Tatsuo Hamamoto