Patents by Inventor Hiroko Iwagoe

Hiroko Iwagoe 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 apparatus and method for processing the same
    Patent number: 6013335
    Abstract: A liquid crystal display apparatus of the invention includes a pair of substrates and a liquid crystal layer sandwiched between the pair of substrates with alignment films formed at interfaces between the liquid crystal layer and the respective substrates. The alignment films regulate aligning conditions of liquid crystal in the liquid crystal layer. In the liquid crystal display apparatus, the liquid crystal layer includes two or more liquid crystal layer regions of different aligning conditions, and at least one of the alignment films has surface tensions which are different from each other in surface regions thereof corresponding to the respective liquid crystal layer regions of different aligning conditions.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: January 11, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mitsuaki Hirata, Shigeaki Mizushima, Kazuyuki Aburazaki, Noriko Watanabe, Hiroko Iwagoe, Seiji Makino, Tomoko Okamura
  • 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 aligning agent and liquid crystal display device
    Patent number: 5756649
    Abstract: A liquid crystal aligning agent comprising a polyamic acid containing an aliphatic and/or alicyclic hydrocarbon group and a polyimide containing an aliphatic and/or alicyclic hydrocarbon group; and a liquid crystal display device using the liquid crystal aligning agent. This liquid crystal aligning agent gives a liquid crystal aligning film which has good liquid crystal aligning property and in which pretilt angle can be changed by radiation with a small energy and which is suitable for domain-divided alignment type liquid crystal display having a wide view angle.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: May 26, 1998
    Assignees: Japan Synthetic Rubber Co., Ltd., Sharp Corporation
    Inventors: Shigeaki Mizushima, Noriko Watanabe, Hiroko Iwagoe, Seiji Makino, Sigeo Kawamura, Yusuke Tsuda, Nobuo Bessho
  • Method for producing a liquid crystal display apparatus by irradiating an aligning film with light to reduce pretilt angles of liquid crystal molecules thereof
    Patent number: 5691792
    Abstract: A liquid crystal display apparatus having a pair of substrates with a liquid crystal layer interposed therebetween is disclosed. Also, a method for producing the same and a substrate are disclosed. In the liquid crystal display apparatus, an aligning film is formed on at least one of the pair of substrates, the surface of the aligning film is made rough for controlling pretilt angles of liquid crystal molecules in the liquid crystal layer which are in contact with the surface of the aligning film, and the degrees of roughness are different among a plurality of prescribed regions.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: November 25, 1997
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shigeaki Mizushima, Kazuyuki Aburazaki, Noriko Watanabe, Mitsuaki Hirata, Hiroko Iwagoe, Tomoko Okamura
  • 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
  • Liquid crystal display apparatus having plural regions of different aligning conditions and method for producing the same
    Patent number: 5666178
    Abstract: A liquid crystal display apparatus of the invention includes a pair of substrates and a liquid crystal layer sandwiched between the pair of substrates with alignment films formed at interfaces between the liquid crystal layer and the respective substrates. The alignment films regulate aligning conditions of liquid crystal in the liquid crystal layer. In the liquid crystal display apparatus, the liquid crystal layer includes two or more liquid crystal layer regions of different aligning conditions, and at least one of the alignment films has surface tensions which are different from each other in surface regions thereof corresponding to the respective liquid crystal layer regions of different aligning conditions.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: September 9, 1997
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mitsuaki Hirata, Shigeaki Mizushima, Kazuyuki Aburazaki, Noriko Watanabe, Hiroko Iwagoe, Seiji Makino, Tomoko Okamura
  • Liquid crystal display apparatus, a method for producing the same, and a substrate having an alignment layer with different degrees of roughness
    Patent number: 5657102
    Abstract: A liquid crystal display apparatus includes a pair of substrates with a liquid crystal layer interposed therebetween. In the liquid crystal display apparatus, an aligning film is formed on at least one of the pair of substrates. The surface of the aligning film is made rough for controlling pretilt angles of liquid crystal molecules in the liquid crystal layer which are in contact with the surface of the aligning film. Further, the degrees of roughness are different among a plurality of prescribed regions.
    Type: Grant
    Filed: January 28, 1994
    Date of Patent: August 12, 1997
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shigeaki Mizushima, Kazuyuki Aburazaki, Noriko Watanabe, Mitsuaki Hirata, Hiroko Iwagoe, Tomoko Okamura
  • 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 apparatus, a method for producing the same, and a substrate
    Patent number: 5627667
    Abstract: A method for producing a liquid crystal display apparatus, including a pair of substrates with a liquid crystal layer interposed therebetween, includes forming an aligning film on at least one of the pair of substrates. The surface of the aligning film is made rough to adjust the pretilt angles of liquid crystal molecules in the liquid crystal layer which are adjacent the aligning film. Further, the degrees of roughness are different among a plurality of prescribed regions.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: May 6, 1997
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shigeaki Mizushima, Kazuyuki Aburazaki, Noriko Watanabe, Mitsuaki Hirata, Hiroko Iwagoe, Tomoko Okamura
  • Liquid crystal aligning agent and liquid crystal display device
    Patent number: 5612450
    Abstract: A liquid crystal aligning agent comprising a polyamic acid containing an aliphatic and/or alicyclic hydrocarbon group and a polyimide containing an aliphatic and/or alicyclic hydrocarbon group; and a liquid crystal display device using the liquid crystal aligning agent. This liquid crystal aligning agent gives a liquid crystal aligning film which has good liquid crystal aligning property and in which pretilt angle can be changed by radiation with a small energy and which is suitable for domain-divided alignment type liquid crystal display having a wide view angle.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: March 18, 1997
    Assignees: Japan Synthetic Rubber Co., Ltd., Sharp Corporation
    Inventors: Shigeaki Mizushima, Noriko Watanabe, Hiroko Iwagoe, Seiji Makino, Sigeo Kawamura, Yusuke Tsuda, Nobuo Bessho
  • Liquid crystal display device and methods for producing same with alignment layer having new bond formation or bond cleavage reaction of molecular chains by light irradiation
    Patent number: 5604615
    Abstract: A liquid crystal display device includes: a pair of substrates; a pair of electrodes formed on the pair of substrates; a pair of alignment films formed on the pair of electrodes; and a liquid crystal layer sandwiched between the pair of alignment films, wherein at least one of the alignment films have a property of aligning liquid crystal molecules of the liquid crystal layer with a pretilt angle, the property being provided by a new bond formation reaction or bond cleavage reaction of molecular chains caused by irradiating the at least one alignment film with light.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: February 18, 1997
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroko Iwagoe, Shigeaki Mizushima
  • 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
  • Liquid crystal display apparatus having regions with different pretilt angles
    Patent number: 5579141
    Abstract: The liquid crystal display apparatus of the invention includes a first substrate and a second substrate disposed so as to face each other, a liquid crystal layer sandwiched between the first substrate and the second substrate, a first alignment film formed between the liquid crystal layer and theist substrate, and a second alignment film formed between the liquid crystal layer and the second substrate.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: November 26, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hisataka Suzuki, Mitsuaki Hirata, Shigeaki Mizushima, Noriko Watanabe, Hiroko Iwagoe, Seiji Makino