Patents by Inventor Youichirou Sugino
Youichirou Sugino 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).
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Patent number: 8331025Abstract: A polarizing plate of the present invention includes a polyvinyl alcohol-based polarizer and transparent protective films provided on both sides of the polarizer with an adhesive layer interposed between the polarizer and each transparent protective film, wherein the transparent protective film on one side comprises a lactone ring structure-containing (meth)acrylic resin and is a retardation plate having an in-plane retardation of 40 nm or more and/or a thickness direction retardation of 80 nm or more, and the transparent protective film on the other side has an in-plane retardation of less than 40 nm and a thickness direction retardation of less than 80 nm. The polarizing plate can satisfy durability and display uniformity (unevenness).Type: GrantFiled: October 21, 2008Date of Patent: December 11, 2012Assignees: Nitto Denko Corporation, Nippon Shokubai Co., Ltd.Inventors: Kanto Kobayashi, Youichirou Sugino, Narifumi Ueda
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Publication number: 20110157525Abstract: The present invention provides a polarizer protective film capable of suppressing blocking that occurs in taking up the film. The polarizer protective film of the present invention includes a (meth)acrylic resin film and an easy-adhesion layer formed of an easy-adhesive composition including a urethane resin and fine particles. The fine particles include preferably colloidal silica.Type: ApplicationFiled: June 1, 2009Publication date: June 30, 2011Applicants: NITTO DENKO CORPORATION, NIPPON SHOKUBAI CO., LTD.Inventors: Tatsuya Yamasaki, Takeshi Saitou, Hiroyuki Takao, Youichirou Sugino, Yuuji Yamashita
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Publication number: 20110019274Abstract: An end face of a polarization plate 10 cut by laser according to the present invention becomes a substantially flat surface having only sloping micro waviness 16 because of having been melted once to be solidified. Since the surface has few stress-concentrated part that may cause microcracks, this prevents microcracks from easily being produced.Type: ApplicationFiled: July 3, 2008Publication date: January 27, 2011Applicant: NITTO DENKO CORPORATIONInventors: Kanto Kobayashi, Kanji Nishida, Naoki Tomoguchi, Youichirou Sugino, Takaichi Amano, Kazuo Kitada
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Publication number: 20100315710Abstract: Provided are an optical film which has high heat resistance, high transparency, and high mechanical strength, and has a sufficient retardation compensation function with a reverse wavelength dispersion characteristics, and a polarizing plate having such an optical film and a polarizer. Further, an image display apparatus of high quality using such a polarizing plate is provided. The optical film of the present invention includes a (meth)acrylic resin having a lactone ring as a main component, in which an in-plane retardation Re(450) at a wavelength of 450 nm/an in-plane retardation Re(600) at a wavelength of 600 nm is less than 1.0.Type: ApplicationFiled: August 4, 2010Publication date: December 16, 2010Applicants: NITTO DENKO CORPORATION, NIPPON SHOKUBAI CO., LTDInventors: Youichirou Sugino, Tsuyoshi Chiba, Naoki Tomoguchi
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Patent number: 7820080Abstract: A method for producing a polarizing film, including: a dyeing step and a stretching step, a plurality of films being dipped into at least one processing liquid without contacting each other.Type: GrantFiled: September 28, 2004Date of Patent: October 26, 2010Assignee: Nitto Denko CorporationInventors: Hiroaki Mizushima, Tadayuki Kameyama, Youichirou Sugino
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Patent number: 7815972Abstract: A polarizing film is provided that prevents display unevenness and can form a liquid crystal display and an electroluminescence display that exhibit excellent display characteristics. The polarizing film is produced in the following manner. That is, a hydrophilic polymer film is conveyed by means of a guide roll so as to be impregnated in an aqueous solvent in a swelling bath and is allowed to swell. In this swelling step, at least a first guide roll is arranged in the swelling bath, and when the polymer film is impregnated in and allowed to travel in the aqueous solvent, the polymer film is brought into contact with the first guide roll within a time up to when swelling reaches a saturation state. Further, the polymer film is dyed using a dichroic substance and stretched.Type: GrantFiled: August 1, 2003Date of Patent: October 19, 2010Assignee: Nitto Denko CorporationInventors: Tadayuki Kameyama, Youichirou Sugino, Hiroaki Mizushima, Morimasa Wada, Naoki Tomoguchi
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Publication number: 20100232018Abstract: A polarizing plate of the present invention includes a polyvinyl alcohol-based polarizer and transparent protective films provided on both sides of the polarizer with an adhesive layer interposed between the polarizer and each transparent protective film, wherein the transparent protective film on one side comprises a lactone ring structure-containing (meth)acrylic resin and is a retardation plate having an in-plane retardation of 40 nm or more and/or a thickness direction retardation of 80 nm or more, and the transparent protective film on the other side has an in-plane retardation of less than 40 nm and a thickness direction retardation of less than 80 nm. The polarizing plate can satisfy durability and display uniformity (unevenness).Type: ApplicationFiled: October 21, 2008Publication date: September 16, 2010Applicants: NITTO DENKO CORPORATION, NIPPON SHOKUBAI CO., LTD.Inventors: Kanto Kobayashi, Youichirou Sugino, Narifumi Ueda
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Publication number: 20100220392Abstract: A polarizing plate of the present invention includes a polyvinyl alcohol-based polarizer and transparent protective films provided on both sides of the polarizer with an adhesive layer interposed between the polarizer and each transparent protective film, wherein the transparent protective films each comprise a lactone ring structure-containing (meth)acrylic resin, each one of the transparent protective films has a thickness T1 (?m) of 10 to 35 ?m, and the polarizer has a thickness T2 (?m) which satisfies that the ratio (T2/T1) of T2 to the thickness T1 of each one of the transparent protective films falls within the range of 0.8 to 1.8. The polarizing plate is designed to be thin and can satisfy durability.Type: ApplicationFiled: October 21, 2008Publication date: September 2, 2010Applicants: NITTO DENKO CORPORATION, NIPPON SHOKUBAI CO., LTD.Inventors: Naoki Tomoguchi, Youichirou Sugino, Nobuaki Iwamoto, Megumi Katou
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Patent number: 7749348Abstract: A method for manufacturing a polarizing plate in which a transparent protective film is provided on at least one surface of a polarizer with an adhesive layer interposed therebetween, wherein an adhesive is coated on a surface of the transparent protective film on which the adhesive layer is formed or/and a surface of the polarizer on which the adhesive layer is formed to form the adhesive layers, and thereafter, an aqueous liquid is caused to be present on an adhering surface when the transparent protective film and the polarizer are continuously adhered to each other with the adhesive layer interposed therebetween. A polarizing plate having uniform polarization characteristics, and excellent in durability is obtained by the method.Type: GrantFiled: August 3, 2004Date of Patent: July 6, 2010Assignee: Nitto Denko CorporationInventors: Naoki Tomoguchi, Youichirou Sugino, Tadayuki Kameyama, Akira Ootani
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Patent number: 7704572Abstract: An adhesive for polarizing plate used in order to provide a transparent protective film on at least one surface of a polarizer, comprising a crosslinking agent in the range of more than 30 parts by weight and 46 parts by weight or less relative to 100 parts by weight of a polyvinyl alcohol-based resin having an acetoacetyl group, is excellent in water resistance.Type: GrantFiled: May 21, 2004Date of Patent: April 27, 2010Assignee: Nitto Denko CorporationInventors: Youichirou Sugino, Ken Aoki, Tadayuki Kameyama, Hiroaki Mizushima, Morimasa Wada, Kenji Shimizu
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Publication number: 20100002298Abstract: Provided are a polarizer protective film containing a (meth)acrylic resin as a main component and being excellent in adhesion with a polarizer, a polarizing plate including the polarizer protective film and a polarizer which are unlikely to peel off from each other, and an image display apparatus of high quality using the polarizing plate. The polarizer protective film of the present invention includes a coating layer containing a (meth) acrylic resin (B) as a main component on at least one surface of a film containing a (meth)acrylic resin (A) as a main component.Type: ApplicationFiled: July 19, 2007Publication date: January 7, 2010Applicant: NITTO DENKO CORPORATIONInventors: Youichirou Sugino, Tsuyoshi Chiba, Tsutomu Hani, Naoki Tomoguchi
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Publication number: 20090202822Abstract: Provided is a polarizer protective film, which has high heat resistance, high transparency, high optical characteristics, and high mechanical strength, and is excellent in adhesion with respect to a polarizer. Further, provided are a polarizing plate using the polarizer protective film and a polarizer, which has high adhesion with respect to the polarizer protective film and the polarizer and is excellent in optical characteristics, and in particular, excellent in transmittance as viewing angle characteristics, and an image display apparatus of high quality using the polarizing plate. The polarizer protective film of the present invention includes a cellulose-based resin layer having a thickness of 0.3 to 3 ?m on at least one surface of a transparent resin layer containing a (meth)acrylic resin having a lactone ring structure.Type: ApplicationFiled: May 14, 2007Publication date: August 13, 2009Applicant: NITTO DENKO CORPORATIONInventors: Hiroaki Hasegawa, Naofumi Tsujino, Hideo Asano, Tsuyoshi Chiba, Naoki Tomoguchi, Youichirou Sugino
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Publication number: 20090153965Abstract: Provided are: a polarizer protective film having excellent optical properties and mechanical strength, with the productivity and reworking property enhanced; a polarizing plate with less defects in an outer appearance, using a polarizer formed of the polarizer protective film and a polyvinyl alcohol-based resin; and an image display apparatus of high quality using the polarizing plate. The polarizer protective film of the present invention includes as a main component a (meth)acrylic resin, which is stretched by longitudinal stretching and/or lateral stretching.Type: ApplicationFiled: March 10, 2006Publication date: June 18, 2009Applicants: NIPPON SHOKUBAI CO., LTD., NITTO DENKO CORPORATIONInventors: Shoji Ito, Ken-ichi Ueda, Kuniaki Ishibashi, Youichirou Sugino, Naoki Tomoguchi, Tsuyoshi Chiba
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Publication number: 20090091826Abstract: Provided are a polarizing plate with less defects of outer appearance, which is extremely excellent in an adhesiveness between a polarizer and a polarizer protective film in an environment of high temperature or high humidity and is also excellent in optical properties, and to which a conventional general-purpose adhesive layer can be applied, and an image display apparatus of high quality using the polarizing plate. The polarizing plate according to the present invention includes a polarizer formed of a polyvinyl alcohol-based resin, an adhesive layer, a metal salt layer, and a polarizer protective film in the stated order.Type: ApplicationFiled: July 12, 2006Publication date: April 9, 2009Applicant: NITTO DENKO CORPORATIONInventor: Youichirou Sugino
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Publication number: 20090002608Abstract: A polarizer that can be used for forming a liquid crystal display or an electroluminescent display with less display irregularities and excellent display characteristics is provided. The polarizer contains a dichroic material in a matrix, and its in-plane retardation at a measurement wavelength providing no absorption is in a range of 950 to 1350 nm. The measurement wavelength is preferably a wavelength that the dichroic material provides no absorption, and it is 1000 nm, for example.Type: ApplicationFiled: August 28, 2008Publication date: January 1, 2009Applicant: Nitto Denko CorporationInventors: Tadayuki Kameyama, Hiroaki Mizushima, Youichirou Sugino, Morimasa Wada
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Publication number: 20080158676Abstract: Provided are a polarizing plate which has no defects of unevenness and is excellent in optical characteristics as well as in external appearance, and an image display apparatus of high quality using such a polarizing plate. The polarizing plate of the present invention includes a polarizer and a protective layer (A) placed on at least one surface of the polarizer, in which the protective layer (A) is a (meth)acrylic resin layer having a thickness of 1 to 50 ?m with a surface hardness of B or more in terms of a pencil hardness, and an adhesive layer having a thickness of 50 to 150 nm is placed between the polarizer and the protective layer (A).Type: ApplicationFiled: December 19, 2007Publication date: July 3, 2008Applicant: NITTO DENKO CORPORATIONInventors: Youichirou SUGINO, Naoki TOMOGUCHI, Tsutomu HANI, Kenji NAKAHARA, Mie NAKATA
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Publication number: 20080151374Abstract: Provided are an optical film which has high heat resistance, high transparency, and high mechanical strength, and has a sufficient retardation compensation function with a reverse wavelength dispersion characteristics, and a polarizing plate having such an optical film and a polarizer. Further, an image display apparatus of high quality using such a polarizing plate is provided. The optical film of the present invention includes a (meth) acrylic resin having a lactone ring as a main component, in which an in-plane retardation Re(450) at a wavelength of 450 nm/an in-plane retardation Re (600) at a wavelength of 600 nm is less than 1.0.Type: ApplicationFiled: December 21, 2007Publication date: June 26, 2008Applicant: NITTO DENKO CORPORATIONInventors: Youichirou SUGINO, Tsuyoshi CHIBA, Naoki TOMOGUCHI
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Publication number: 20080112048Abstract: A polarizing plate of the invention comprises a polarizer; and a transparent protective film provided on at least one side of the polarizer with an adhesive layer interposed therebetween, wherein the adhesive layer is formed of an adhesive for polarizing plate comprising: a resin solution comprising a polyvinyl alcohol-based resin, a crosslinking agent and a colloidal metal compound with an average particle size of 1 nm to 100 nm, wherein 200 parts by weight or less of the colloidal metal compound is added to 100 parts by weight of the polyvinyl alcohol-based resin, and the transparent protective film provided on at least one side is a retardation plate having a front retardation of 40 nm or more and/or a thickness direction retardation of 80 nm or more. The polarizing plate can reduce the occurrence of knicks.Type: ApplicationFiled: November 15, 2007Publication date: May 15, 2008Applicant: NITTO DENKO CORPORATIONInventors: Megumi KATOU, Mie NAKATA, Kanto KOBAYASHI, Hiroaki MIZUSHIMA, Youichirou SUGINO, Tetsurou IKEDA
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Patent number: 7355663Abstract: A polarizing plate excellent in polarization performance in all wavebands from a short wavelength region to a long wavelength region and a liquid crystal display using such a polarizing plate. The polarizing plate including a polarizer has a portion having a polarization degree of 99% or more at each wavelength of light for wavelengths of 420 to 550 nm and a portion having a polarization degree of 99% or more at each wavelength of light for wavelengths of 550 to 700 nm.Type: GrantFiled: October 23, 2001Date of Patent: April 8, 2008Assignee: Nitto Denko CorporationInventors: Yuji Saiki, Senri Kondou, Youichirou Sugino, Seiichi Kusumoto, Eiji Hamamoto, Takashi Shouda
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Patent number: RE44315Abstract: The present invention provides a polarizing film or a polarizer that has an elastic modulus of at most about 3500 N/mm2 and suppresses occurrence of warping, the polarizing film is obtained by adsorbing a dichroic material in a polyvinyl alcohol-based film 20 ?m in thickness and stretching the film. The polarizing film has a transmittance of at least 43% and a polarization degree of at least 98%. A transparent protective layer is laminated on at least one surface of the polarizing film to form a polarizing plate.Type: GrantFiled: July 25, 2012Date of Patent: June 25, 2013Assignee: Nitto Denko CorporationInventors: Youichirou Sugino, Hisashi Mihara, Kazuhiro Higashio, Seiichi Kusumoto