Patents by Inventor Akihiro Nammatsu

Akihiro Nammatsu 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).

  • Liquid crystal display including pixel electrode(s) designed to improve viewing characteristics
    Patent number: 6141077
    Abstract: A liquid crystal display is described which includes a pair of transparent substrates disposed opposite each other sandwiching a liquid crystal layer therebetween, with a transparent electrode and an alignment film formed on the liquid crystal layer side of each of the substrates. The transparent electrodes disposed opposite each other in pairs are at two or more different spacings at least within one display area of a pixel.
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: October 31, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mitsuaki Hirata, Akihiro Nammatsu, Kei Oyobe, Shigeaki Mizushima, Noriko Watanabe, Shingo Jogan
  • Liquid crystal display having two or more spacings between electrodes
    Patent number: 5953093
    Abstract: A liquid crystal display is described which includes a pair of transparent substrates disposed opposite each other sandwiching a liquid crystal layer therebetween, with a transparent electrode and an alignment film formed on the liquid crystal layer side of each of the substrates. The transparent electrodes disposed opposite each other in pairs are at two or more different spacings at least within one display area of a pixel.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: September 14, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mitsuaki Hirata, Akihiro Nammatsu, Kei Oyobe, Shigeaki Mizushima, Noriko Watanabe, Shingo Jogan
  • Liquid crystal display having two or more spacings between electrodes
    Patent number: 5872611
    Abstract: A liquid crystal display is described which includes a pair of transparent substrates disposed opposite each other sandwiching a liquid crystal layer therebetween, with a transparent electrode and an alignment film formed on the liquid crystal layer side of each of the substrates. The transparent electrodes disposed opposite each other in pairs are at two or more different spacings at least within one display area of a pixel.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: February 16, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mitsuaki Hirata, Akihiro Nammatsu, Kei Oyobe, Shigeaki Mizushima, Noriko Watanabe, Shingo Jogan
  • Liquid crystal display device and method for producing the same
    Patent number: 5855968
    Abstract: A liquid crystal display device which includes a pair of substrates; a liquid crystal layer sandwiched between the pair of substrates; and an electrode for applying a voltage to the liquid crystal layer is disclosed. The liquid crystal layers includes liquid crystal molecules, and is divided into a plurality of regions having different twist angles from one another.
    Type: Grant
    Filed: October 22, 1997
    Date of Patent: January 5, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mitsuaki Hirata, Akihiro Nammatsu, Noriko Watanabe, Shigeaki Mizushima, Seiji Makino, Hiroko Iwagoe, Kei Oyobe
  • Liquid crystal display device, method and apparatus for fabricating the same
    Patent number: 5850273
    Abstract: A liquid crystal display device includes: a first substrate; a second substrate; a liquid crystal layer interposed between the first and the second substrates; a plurality of electrodes for applying a voltage to the liquid crystal layer; a first alignment film provided on a surface of the first substrate in contact with the liquid crystal layer; a second alignment film provided on a surface of the second substrate in contact with the liquid crystal layer; and a plurality of pixels. The liquid crystal layer in each of the pixels includes first and second liquid crystal regions, liquid crystal molecules in the first and the second liquid crystal regions have an identical twisting direction.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: December 15, 1998
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shin-Ichi Terashita, Nobuaki Yamada, Takako Adachi, Akihiro Nammatsu, Seiji Makino, Shigeaki Mizushima
  • Liquid crystal display device having regions with different twist angles
    Patent number: 5689322
    Abstract: A liquid crystal display device which includes a pair of substrates; a liquid crystal layer sandwiched between the pair of substrates; and an electrode for applying a voltage to the liquid crystal layer is disclosed. The liquid crystal layers includes liquid crystal molecules, and is divided into a plurality of regions having different twist angles from one another.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: November 18, 1997
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mitsuaki Hirata, Akihiro Nammatsu, Noriko Watanabe, Shigeaki Mizushima, Seiji Makino, Hiroko Iwagoe, Kei Oyobe
  • Multiple domain liquid crystal display device with particular reference orientation directions and method for producing the same
    Patent number: 5652634
    Abstract: A liquid crystal display device which includes a pair of substrates; a liquid crystal layer sandwiched between the pair of substrates; and an electrode for applying a voltage to the liquid crystal layer is disclosed. The liquid crystal layers includes liquid crystal molecules, and is divided into a plurality of regions having different twist angles from one another.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: July 29, 1997
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mitsuaki Hirata, Akihiro Nammatsu, Noriko Watanabe, Shigeaki Mizushima, Seiji Makino, Hiroko Iwagoe, Kei Oyobe
  • Liquid crystal display device and method for producing the same
    Patent number: 5594570
    Abstract: A liquid crystal display device which includes a pair of substrates; a liquid crystal layer sandwiched between the pair of substrates; and an electrode for applying a voltage to the liquid crystal layer is disclosed. The liquid crystal layers includes liquid crystal molecules, and is divided into a plurality of regions having different twist angles from one another.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: January 14, 1997
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mitsuaki Hirata, Akihiro Nammatsu, Noriko Watanabe, Shigeaki Mizushima, Seiji Makino, Hiroko Iwagoe, Kei Oyobe
  • Process for preparing orientation film for liquid crystals
    Patent number: 5151298
    Abstract: A process for preparing an orientation film for liquid crystals which comprises forming a base layer of a thermoplastic or non-thermoplastic resin to be used for the orientation film, on a substrate for liquid crystal display, and rubbing the base layer under heating at a temperature not lower than 50.degree. C. but below the melting temperature of decomposition temperature of the resin.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: September 29, 1992
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Akihiro Nammatsu, Mitsuo Ishii, Shigehiro Minezaki