Patents by Inventor Noriyuki Nakai

Noriyuki Nakai 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).

  • Process for producing a color filter
    Patent number: 5721077
    Abstract: A photosensitive colored material mainly composed of an aromatic polyamide or polyimide resin having a photosensitive group in its molecule, a coloring matter, and a solvent, wherein; said solvent comprises a first solvent component capable of independently dissolving said resin alone and a second solvent component having a smaller surface tension than said first solvent component and incapable of independently solving said resin; and the content of said first solvent component is larger than the content of said second solvent component.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 24, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hideaki Takao, Kazuya Ishiwata, Noriyuki Nakai, Naoya Nishida, Tatsuo Murata
  • Process for injecting liquid crystal into a liquid crystal panel
    Patent number: 5699138
    Abstract: A large-sized liquid crystal panel uniformly filled with a liquid crystal material may be produced through a process including the steps of: fixing a pair of substrates with a sealing member disposed therebetween to form a blank panel having an injection port, reducing a pressure within the panel, applying a liquid crystal material onto the injection port, heating the liquid crystal material to its isotropic temperature, injecting the liquid crystal material into the panel under a pressure, and filling the panel with the liquid crystal material under heating and pressurization from the injection port toward the panel inside. The pressure within the panel before the injection is reduced at a rate not exceeding 25 torr/min. The pressure for injection is increased at varying rates, e.g., with an intermediate constant pressure period.
    Type: Grant
    Filed: April 26, 1995
    Date of Patent: December 16, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuyuki Watanabe, Kazuya Ishiwata, Masaaki Suzuki, Noriyuki Nakai, Takashi Enomoto, Naoya Nishida, Tatsuo Murata, Mutsuo Mitsui, Masayuki Shimamune
  • Process for producing liquid crystal panel including reducing the pressure to no more than 25 torr/minute
    Patent number: 5576865
    Abstract: A large-sized liquid crystal panel uniformly filled with a liquid crystal material may be produced through a process including the steps of: fixing a pair of substrates with a sealing member disposed therebetween to form a blank panel having an injection port, reducing a pressure within the panel, applying a liquid crystal material onto the injection port, heating the liquid crystal material to its isotropic temperature, injecting the liquid crystal material into the panel under a pressure, and filling the panel with the liquid crystal material under heating and pressurization from the injection port toward the panel inside. The pressure within the panel before the injection is reduced at a rate not exceeding 25 torr/min. The pressure for injection is increased at varying rates, e.g., with an intermediate constant pressure period.
    Type: Grant
    Filed: April 26, 1995
    Date of Patent: November 19, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuyuki Watanabe, Kazuya Ishiwata, Masaaki Suzuki, Noriyuki Nakai, Takashi Enomoto, Naoya Nishida, Tatsuo Murata, Mutsuo Mitsui, Masayuki Shimamune
  • Increasing temperature injection methods for a liquid crystal cell
    Patent number: 5479284
    Abstract: A large-sized liquid crystal panel uniformly filled with a liquid crystal material may be produced through a process including the steps of: fixing a pair of substrates with a sealing member disposed therebetween to form a blank panel having an injection port, reducing a pressure within the panel, applying a liquid crystal material onto the injection port, heating the liquid crystal material to its isotropic temperature, injecting the liquid crystal material into the panel under a pressure, and filling the panel with the liquid crystal material under heating and pressurization from the injection port toward the panel inside. The pressure within the panel before the injection is reduced at a rate not exceeding 25 torr/min. The pressure for injection is increased at varying rates, e.g., with an intermediate constant pressure period.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: December 26, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuyuki Watanabe, Kazuya Ishiwata, Masaaki Suzuki, Noriyuki Nakai, Takashi Enomoto, Naoya Nishida, Tatsuo Murata, Mutsuo Mitsui, Masayuki Shimamune