Patents by Inventor Sota Kawakami

Sota Kawakami 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: 8110128
    Abstract: Disclosed is an anti-glare anti-reflection film having a low haze and reduced in unevenness and dazzle. The film contains a thermoplastic resin film and at least a hard coat layer and an anti-reflection layer provided on a first surface of the thermoplastic resin film. In the film, a first convexoconcave structure that can give an anti-glare property is provided on the first surface of the thermoplastic resin film or the surface of a layer provided on the first surface of the thermoplastic resin film, and a second convexoconcave structure that can give an anti-glare property is provided on a second surface which is the other surface of the thermoplastic resin film or the surface of a layer provided on the second surface of the thermoplastic resin film. The anti-glare anti-reflection film has an average film thickness of 20 to 70 ?m.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: February 7, 2012
    Assignee: Konica Minolta Opto, Inc.
    Inventors: Masayuki Kurematsu, Toshiaki Shibue, Sota Kawakami, Katsumi Maejima
  • Patent number: 7880840
    Abstract: The method to produce the vertical alignment type liquid crystal display employs treating an optical film comprising of cellulous ester with an aqueous solution of sodium hydroxide to prepare an alkali-treated optical film; immersing a polyvinyl alcohol film in an aqueous solution containing iodine and boric acid; stretching the polyvinyl alcohol film to prepare a polarizing film; adhering the alkali-treated optical film onto both surfaces of the polarizing film to prepare a polarizing plate; and providing the polarizing plate on both surfaces of a vertical alignment type liquid crystal cell to providing the vertical alignment type liquid crystal display. At least one of the optical film has a retardation value (Rt value) in the thickness direction of from 60 to 300 nm, Rt=[(nx+ny)/2?nz]×d.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: February 1, 2011
    Assignee: Konica Corporation, A Corporation of Japan
    Inventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
  • Publication number: 20100314035
    Abstract: The method to produce the vertical alignment type liquid crystal display employs treating an optical film comprising of cellulous ester with an aqueous solution of sodium hydroxide to prepare an alkali-treated optical film; immersing a polyvinyl alcohol film in an aqueous solution containing iodine and boric acid; stretching the polyvinyl alcohol film to prepare a polarizing film; adhering the alkali-treated optical film onto both surfaces of the polarizing film to prepare a polarizing plate; and providing the polarizing plate on both surfaces of a vertical alignment type liquid crystal cell to providing the vertical alignment type liquid crystal display. At least one of the optical film has a retardation value (Rt value) in the thickness direction of from 60 to 300 nm, Rt=[(nx+ny)/2?nz]×d.
    Type: Application
    Filed: August 20, 2010
    Publication date: December 16, 2010
    Applicant: KONICA CORPORATION
    Inventors: Toshiaki SHIBUE, Makoto HONDA, Nobuo KUBO, Noriyasu KUZUHARA, Hiroki UMEDA, Sota KAWAKAMI, Takatoshi YAJIMA
  • Patent number: 7791696
    Abstract: Disclosed is an optically anisotropic film used for a liquid crystal display of a vertical alignment liquid crystal mode comprising a fatty acid cellulose aster film, a retardation value (Rt value) in the thickness direction of the fatty acid cellulose ester film is from 60 to 300 nm, and the number of luminescent points having a size exceeding 50 ?m is zero per 250 mm2, and the number of luminescent points having a size of 5 to 50 ?m is 200 or less per 250 mm2 when the fatty acid cellulose ester film is observed with two polarizing plates being provided on both surfaces of the fatty acid cellulose ester film so as to shield transmission light.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: September 7, 2010
    Assignee: Konica Corporation
    Inventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
  • Patent number: 7771781
    Abstract: It is an object of the present invention to provide an anti-glare film and a manufacturing method thereof, in which undesired image capturing caused by outside light and lowered contrast are effectively inhibited without lowering sharpness of a high quality image via miniaturization of a pixel size, and a desired micro-roughened structure is stably formed effectively with good productivity, and further to provide an anti-glaring anti-reflection film, a polarizing plate, and a display thereof. Disclosed is a manufacturing method of an anti-glare film possessing the step of forming a roughened structure with ink adhesion portions and unfinished ink adhesion portions, provided on a substrate film surface via flexographic printing, employing a seamless resin plate having a diameter of 50-1000 mm and a rubber hardness degree of 30-80.
    Type: Grant
    Filed: March 2, 2006
    Date of Patent: August 10, 2010
    Assignee: Konica Minolta Opto, Inc.
    Inventor: Sota Kawakami
  • Patent number: 7638163
    Abstract: A method for forming an anti-glare layer, including the step of: ejecting droplets of an ink with an ink-jet apparatus onto a transparent substrate so as to form a microscopically roughened structure on the transparent substrate, wherein the ink contains an ingredient capable of giving an anti-glare property to the transparent substrate.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: December 29, 2009
    Assignee: Konica Minolta Holdings, Inc.
    Inventors: Takashi Murakami, Sota Kawakami
  • Publication number: 20090002616
    Abstract: Disclosed is an optically anisotropic film used for a liquid crystal display of a vertical alignment liquid crystal mode comprising a fatty acid cellulose aster film, a retardation value (Rt value) in the thickness direction of the fatty acid cellulose ester film is from 60 to 300 nm, and the number of luminescent points having a size exceeding 50 ?m is zero per 250 mm2, and the number of luminescent points having a size of 5 to 50 ?m is 200 or less per 250 mm2 when the fatty acid cellulose ester film is observed with two polarizing plates being provided on both surfaces of the fatty acid cellulose ester film so as to shield transmission light.
    Type: Application
    Filed: September 2, 2008
    Publication date: January 1, 2009
    Applicant: KONICA CORPORATION
    Inventors: Toshiaki SHIBUE, Makoto HONDA, Nobuo KUBO, Noriyasu KUZUHARA, Hiroki UMEDA, Sota KAWAKAMI, Takatoshi YAJIMA
  • Patent number: 7435458
    Abstract: An optically anisotropic film is disclosed. The film comprises a fatty acid cellulose ester film support having an acetyl group and a propionyl group, and a liquid crystal layer containing a liquid crystal compound, or a resin layer containing polyimide, polyamidoimide, polyamide, polyether imide, polyether ether ketone, polyether ketone, polyketone sulfide, polyether sulfone, polysulfone, polyphenylene sulfide, polyphenylene oxide, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyacetal, polycarbonate, polyallylate, acrylic resin, polyvinyl alcohol, polypropylene, cellulose based plastics, epoxy resin, or phenol resin.
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: October 14, 2008
    Assignee: Konica Corporation
    Inventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
  • Publication number: 20070166484
    Abstract: An optically anisotropic film is disclosed. The film comprises a fatty acid cellulose ester film support having an acetyl group and a propionyl group, and a liquid crystal layer containing a liquid crystal compound, or a resin layer containing polyimide, polyamidoimide, polyamide, polyether imide, polyether ether ketone, polyether ketone, polyketone sulfide, polyether sulfone, polysulfone, polyphenylene sulfide, polyphenylene oxide, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyacetal, polycarbonate, polyallylate, acrylic resin, polyvinyl alcohol, polypropylene, cellulose based plastics, epoxy resin, or phenol resin.
    Type: Application
    Filed: March 20, 2007
    Publication date: July 19, 2007
    Applicant: KONICA CORPORATION
    Inventors: Toshiaki SHIBUE, Makoto HONDA, Nobuo KUBO, Noriyasu KUZUHARA, Hiroki UMEDA, Sota KAWAKAMI, Takatoshi YAJIMA
  • Patent number: 7218367
    Abstract: An optical compensation sheet comprising at least two optically anisotropic layers each formed by orienting an optically anisotropic compound, the orientation direction in the optically anisotropic layer plane of the optically anisotropic compound in the two optically anisotropic layers intersecting each other at an angle of from 80 to 100 degrees, wherein, viewing the two layers from one side of the sheet, one of the two layers, when the compound is uniaxial, is oriented so that a first angle of optic axis of the uniaxial optically anisotropic compound to the sheet plane increases continuously or stepwise in the thickness direction of the sheet, or when the compound is biaxial, is oriented so that a second angle of a direction giving maximum refractive index of the biaxial optically anisotropic compound to the sheet plane increases continuously or stepwise in the thickness direction of the sheet, and the other layer, when the compound is uniaxial, is oriented so that the first angle decreases continuously or
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: May 15, 2007
    Assignee: Konica Corporation
    Inventors: Hiroki Umeda, Noriyasu Kuzuhara, Nobuo Kubo, Sota Kawakami, Nobuyuki Takiyama, Koji Tasaka
  • Patent number: 7208205
    Abstract: A film for a liquid crystal display comprising a fatty acid cellulose ester film having an acetyl group and a propionyl group is disclosed. Sum of degree of acetyl substitution (DSac) and degree of propionyl substitution (DSpr) of the fatty acid cellulose ester film of the film is 2.8 or less, and a retardation value (Rt value) in the thickness direction define by Formula 1 is 60 to 300 nm.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: April 24, 2007
    Assignee: Konica Corporation
    Inventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
  • Publication number: 20060204718
    Abstract: It is an object of the present invention to provide an anti-glare film and a manufacturing method thereof, in which undesired image capturing caused by outside light and lowered contrast are effectively inhibited without lowering sharpness of a high quality image via miniaturization of a pixel size, and a desired micro-roughened structure is stably formed effectively with good productivity, and further to provide an anti-glaring anti-reflection film, a polarizing plate, and a display thereof. Disclosed is a manufacturing method of an anti-glare film possessing the step of forming a roughened structure eith ink adhesion portions and unfinished ink adhesion portions, provided on a substrate film surface via flexographic printing, employing a seamless resin plate having a diameter of 50-1000 mm and a rubber hardness degree of 30-80.
    Type: Application
    Filed: March 2, 2006
    Publication date: September 14, 2006
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventor: Sota Kawakami
  • Publication number: 20040180149
    Abstract: A film for a liquid crystal display comprising a fatty acid cellulose ester film having an acetyl group and a propionyl group is disclosed. Sum of degree of acetyl substitution (DSac) and degree of propionyl substitution (DSpr) of the fatty acid cellulose ester film of the film is 2.8 or less, and a retardation value (Rt value) in the thickness direction define by Formula 1 is 60 to 300 nm.
    Type: Application
    Filed: March 24, 2004
    Publication date: September 16, 2004
    Applicant: Konica Corporation
    Inventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
  • Patent number: 6740370
    Abstract: A film for a liquid crystal display comprising a fatty acid celluose ester film having an acetyl group and a propionyl group is disclosed. Sum of degree of acetyl substitution (DSac) and degree of propionyl substitution (DSpr) of the fatty acid celluose ester film of the film is 2.8 or less, and a retardation value (Rt value) in the thickness direction defined by Formula 1 is 60 to 300 nm.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: May 25, 2004
    Assignee: Konica Corporation
    Inventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
  • Publication number: 20040091642
    Abstract: A method for forming an anti-glare layer, including the step of; ejecting dropletts of an ink with an ink-jet apparatus onto a transparent substrate so as to form a microscopically roughened structure on the transparent substrate, wherein the ink contains an ingredient capable of giving an anti-glare property to the transparent substrate.
    Type: Application
    Filed: October 28, 2003
    Publication date: May 13, 2004
    Inventors: Takashi Murakami, Sota Kawakami
  • Publication number: 20040022962
    Abstract: A film for a liquid crystal display comprising a fatty acid cellulose ester film having an acetyl group and a propionyl group is disclosed. Sum of degree of acetyl substitution (DSac) and degree of propionyl substitution (DSpr) of the fatty acid cellulose ester film of the film is 2.8 or less, and a retardation value (Rt value) in the thickness direction defined by Formula 1 is 60 to 300 nm.
    Type: Application
    Filed: July 18, 2003
    Publication date: February 5, 2004
    Applicant: Konica Corporation
    Inventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
  • Patent number: 6623811
    Abstract: A film for a liquid crystal display comprising a fatty acid cellulose ester film having an acetyl group and a propionyl group is disclosed. Sum of degree of acetyl substitution (DSac) and degree of propionyl substitution (DSpr) of the fatty acid cellulose ester film of the film is 2.8 or less, and a retardation value (Rt value) in the thickness direction defined by Formula 1 is 60 to 300 nm.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: September 23, 2003
    Assignee: Konica Corporation
    Inventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
  • Publication number: 20030129327
    Abstract: A film for a liquid crystal display comprising a fatty acid cellulose ester film having an acetyl group and a propionyl group is disclosed. Sum of degree of acetyl substitution (DSac) and degree of propionyl substitution (DSpr) of the fatty acid cellulose ester film of the film is 2.8 or less, and a retardation value (Rt value) in the thickness direction defined by Formula 1 is 60 to 300 nm.
    Type: Application
    Filed: November 5, 2002
    Publication date: July 10, 2003
    Inventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
  • Publication number: 20030067572
    Abstract: An optical compensation sheet comprising at least two optically anisotropic layers each formed by orienting an optically anisotropic compound, the orientation direction in the optically anisotropic layer plane of the optically anisotropic compound in the two optically anisotropic layers intersecting each other at an angle of from 80 to 100 degrees, wherein, viewing the two layers from one side of the sheet, one of the two layers, when the compound is uniaxial, is oriented so that a first angle of optic axis of the uniaxial optically anisotropic compound to the sheet plane increases continuously or stepwise in the thickness direction of the sheet, or when the compound is biaxial, is oriented so that a second angle of a direction giving maximum refractive index of the biaxial optically anisotropic compound to the sheet plane increases continuously or stepwise in the thickness direction of the sheet, and the other layer, when the compound is uniaxial, is oriented so that the first angle decreases continuously or
    Type: Application
    Filed: March 29, 2001
    Publication date: April 10, 2003
    Applicant: KONICA CORPORATION
    Inventors: Hiroki Umeda, Noriyasu Kuzuhara, Nobuo Kubo, Sota Kawakami, Nobuyuki Takiyama, Koji Tasaka
  • Patent number: 6503581
    Abstract: A film for a liquid crystal display comprising a fatty acid cellulose ester film having an acetyl group and a propionyl group is disclosed. The sum of degree of acetyl substitution (DSac) and degree of propionyl substitution (DSpr) of the fatty acid cellulose ester film of the film is 2.8 of less, and a retardation value (Rt value) in the thickness direction defined by Formula 1 is 60 to 300 nm.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: January 7, 2003
    Assignee: Konica Corporation
    Inventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima