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: 8110128Abstract: 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: GrantFiled: September 13, 2006Date of Patent: February 7, 2012Assignee: Konica Minolta Opto, Inc.Inventors: Masayuki Kurematsu, Toshiaki Shibue, Sota Kawakami, Katsumi Maejima
-
Patent number: 7880840Abstract: 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: GrantFiled: August 20, 2010Date of Patent: February 1, 2011Assignee: Konica Corporation, A Corporation of JapanInventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
-
Publication number: 20100314035Abstract: 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: ApplicationFiled: August 20, 2010Publication date: December 16, 2010Applicant: KONICA CORPORATIONInventors: Toshiaki SHIBUE, Makoto HONDA, Nobuo KUBO, Noriyasu KUZUHARA, Hiroki UMEDA, Sota KAWAKAMI, Takatoshi YAJIMA
-
Patent number: 7791696Abstract: 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: GrantFiled: September 2, 2008Date of Patent: September 7, 2010Assignee: Konica CorporationInventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
-
Patent number: 7771781Abstract: 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: GrantFiled: March 2, 2006Date of Patent: August 10, 2010Assignee: Konica Minolta Opto, Inc.Inventor: Sota Kawakami
-
Patent number: 7638163Abstract: 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: GrantFiled: October 28, 2003Date of Patent: December 29, 2009Assignee: Konica Minolta Holdings, Inc.Inventors: Takashi Murakami, Sota Kawakami
-
Publication number: 20090002616Abstract: 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: ApplicationFiled: September 2, 2008Publication date: January 1, 2009Applicant: KONICA CORPORATIONInventors: Toshiaki SHIBUE, Makoto HONDA, Nobuo KUBO, Noriyasu KUZUHARA, Hiroki UMEDA, Sota KAWAKAMI, Takatoshi YAJIMA
-
Patent number: 7435458Abstract: 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: GrantFiled: March 20, 2007Date of Patent: October 14, 2008Assignee: Konica CorporationInventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
-
Publication number: 20070166484Abstract: 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: ApplicationFiled: March 20, 2007Publication date: July 19, 2007Applicant: KONICA CORPORATIONInventors: Toshiaki SHIBUE, Makoto HONDA, Nobuo KUBO, Noriyasu KUZUHARA, Hiroki UMEDA, Sota KAWAKAMI, Takatoshi YAJIMA
-
Patent number: 7218367Abstract: 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 orType: GrantFiled: March 29, 2001Date of Patent: May 15, 2007Assignee: Konica CorporationInventors: Hiroki Umeda, Noriyasu Kuzuhara, Nobuo Kubo, Sota Kawakami, Nobuyuki Takiyama, Koji Tasaka
-
Patent number: 7208205Abstract: 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: GrantFiled: March 24, 2004Date of Patent: April 24, 2007Assignee: Konica CorporationInventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
-
Publication number: 20060204718Abstract: 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: ApplicationFiled: March 2, 2006Publication date: September 14, 2006Applicant: KONICA MINOLTA OPTO, INC.Inventor: Sota Kawakami
-
Publication number: 20040180149Abstract: 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: ApplicationFiled: March 24, 2004Publication date: September 16, 2004Applicant: Konica CorporationInventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
-
Patent number: 6740370Abstract: 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: GrantFiled: July 18, 2003Date of Patent: May 25, 2004Assignee: Konica CorporationInventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
-
Publication number: 20040091642Abstract: 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: ApplicationFiled: October 28, 2003Publication date: May 13, 2004Inventors: Takashi Murakami, Sota Kawakami
-
Publication number: 20040022962Abstract: 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: ApplicationFiled: July 18, 2003Publication date: February 5, 2004Applicant: Konica CorporationInventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
-
Patent number: 6623811Abstract: 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: GrantFiled: November 5, 2002Date of Patent: September 23, 2003Assignee: Konica CorporationInventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
-
Publication number: 20030129327Abstract: 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: ApplicationFiled: November 5, 2002Publication date: July 10, 2003Inventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima
-
Publication number: 20030067572Abstract: 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 orType: ApplicationFiled: March 29, 2001Publication date: April 10, 2003Applicant: KONICA CORPORATIONInventors: Hiroki Umeda, Noriyasu Kuzuhara, Nobuo Kubo, Sota Kawakami, Nobuyuki Takiyama, Koji Tasaka
-
Patent number: 6503581Abstract: 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: GrantFiled: October 18, 2000Date of Patent: January 7, 2003Assignee: Konica CorporationInventors: Toshiaki Shibue, Makoto Honda, Nobuo Kubo, Noriyasu Kuzuhara, Hiroki Umeda, Sota Kawakami, Takatoshi Yajima