Patents by Inventor Toru Umemoto
Toru Umemoto 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: 10852455Abstract: A laminate of optical elements comprises a transparent first optical element, a second optical element, and a transparent pressure-sensitive adhesive layer for bonding the first optical element to the second optical element. The pressure-sensitive adhesive layer comprises a base adhesive zone, a transparent refractive index-adjusting zone. The base adhesive zone is made essentially of a transparent base pressure-sensitive adhesive material and formed over a given range from a first principal surface of the pressure-sensitive adhesive layer facing the first optical element, in a thickness direction of the pressure-sensitive adhesive layer. The a transparent, adherent, refractive index-adjusting zone is formed over a given range from a second principal surface of the pressure-sensitive adhesive layer facing the second optical element.Type: GrantFiled: January 16, 2015Date of Patent: December 1, 2020Assignee: NITTO DENKO CORPORATIONInventors: Toru Umemoto, Hirofumi Katami, Hiroyuki Takao, Takahiro Nonaka, Atsushi Yasui, Takami Hikita
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Patent number: 10598829Abstract: The present invention relates to a water-resistant organic thin film obtained by crosslinking, with organic nitrogen compounds, an organic thin film comprising an organic dye having an anionic group, wherein the organic nitrogen compounds are first, second, and third acyclic organic nitrogen compounds each having two or more nitrogen atoms per molecule, wherein the nitrogen atoms of each of the first, second, and third organic nitrogen compounds are each in a cationic group, and the relation A?0.4 nm<B<C is satisfied, wherein A represents a distance (nm) between adjacent nitrogen atoms in the first organic nitrogen compound, B represents a distance (nm) between adjacent nitrogen atoms in the second organic nitrogen compound, and C represents a distance (nm) between adjacent nitrogen atoms in the third organic nitrogen compound.Type: GrantFiled: June 10, 2013Date of Patent: March 24, 2020Assignee: NITTO DENKO CORPORATIONInventors: Hiroshi Tomohisa, Toru Umemoto, Shoichi Matsuda, Tadayuki Kameyama
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Patent number: 10259193Abstract: In the case where a pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer having a refractive index adjustment zone is provided in such a manner that two PET separators are laminated to opposite surfaces of the pressure-sensitive adhesive layer, it is difficult to distinguish between obverse and reverse sides of the pressure-sensitive adhesive sheet itself. The present invention is directed to solving the above problems and, specifically, to offering a pressure-sensitive adhesive sheet having a refractive index adjustment zone capable of being easily produced at low cost, in a state in which it is preliminarily laminated with a substrate provided with an electroconductive layer, thereby making it possible to resolve complexity in handling (to easily distinguish between one surface defined by the refractive index adjustment zone and the other surface defined by the remaining zone).Type: GrantFiled: July 11, 2016Date of Patent: April 16, 2019Assignee: NITTO DENKO CORPORATIONInventors: Hirofumi Katami, Toru Umemoto, Hiroyuki Takao, Atsushi Yasui
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Patent number: 10072184Abstract: A pressure-sensitive adhesive sheet comprises a support and a transparent pressure-sensitive adhesive layer on the support. The pressure-sensitive adhesive layer comprises a base adhesive zone made essentially of a transparent base pressure-sensitive adhesive material and formed over a given range from a first principal surface of the pressure-sensitive adhesive layer in a thickness direction of the pressure-sensitive adhesive layer, and a transparent, adherent, refractive index-adjusting zone formed over a given range from a second principal surface of the pressure-sensitive adhesive layer in the thickness direction, and wherein the refractive index-adjusting zone has a refractive index greater than a refractive index of the base pressure-sensitive adhesive material.Type: GrantFiled: January 16, 2015Date of Patent: September 11, 2018Assignee: NITTO DENKO CORPORATIONInventors: Hirofumi Katami, Toru Umemoto, Hiroyuki Takao, Takahiro Nonaka, Atsushi Yasui, Takami Hikita
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Patent number: 10023766Abstract: As one sensor layer structure for a capacitive touch panel, a layer structure in which a transparent electroconductive layer is formed on each of opposite surfaces of a single film substrate, so-called GFD structure, is used. In the structure, for sufficiently suppressing internal reflection from the transparent electroconductive layer, it is necessary to employ a technique of forming one or more refractive index adjustment (IM) layers on each of the opposite surfaces of the single film substrate. This causes a problem that production yield is likely to deteriorate, and a production cost is increased. The present invention is directed to solving such a problem and, specifically, to laminating a refractive index adjustment zone-formed pressure-sensitive adhesive layer capable of being produced easily and at low cost, to each transparent electroconductive layer of a double-sided transparent electroconductive film, so as to effectively suppress internal reflection in the resulting laminate.Type: GrantFiled: July 11, 2016Date of Patent: July 17, 2018Assignee: NITTO DENKO CORPORATIONInventors: Hirofumi Katami, Toru Umemoto, Hiroyuki Takao, Atsushi Yasui
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Publication number: 20180022962Abstract: As one sensor layer structure for a capacitive touch panel, a layer structure in which a transparent electroconductive layer is formed on each of opposite surfaces of a single film substrate, so-called GFD structure, is used. In the structure, for sufficiently suppressing internal reflection from the transparent electroconductive layer, it is necessary to employ a technique of forming one or more refractive index adjustment (IM) layers on each of the opposite surfaces of the single film substrate. This causes a problem that production yield is likely to deteriorate, and a production cost is increased. The present invention is directed to solving such a problem and, specifically, to laminating a refractive index adjustment zone-formed pressure-sensitive adhesive layer capable of being produced easily and at low cost, to each transparent electroconductive layer of a double-sided transparent electroconductive film, so as to effectively suppress internal reflection in the resulting laminate.Type: ApplicationFiled: July 11, 2016Publication date: January 25, 2018Inventors: Hirofumi KATAMI, Toru UMEMOTO, Hiroyuki TAKAO, Atsushi YASUI
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Patent number: 9874987Abstract: Provided are a double-sided transparent conductive film which has blocking resistance and a low reflectance, and is inhibited from scattering reflected light to exhibit good visibility; a roll thereof; and a touch panel.Type: GrantFiled: January 29, 2015Date of Patent: January 23, 2018Assignee: NITTO DENKO CORPORATIONInventors: Naoki Hashimoto, Katsunori Takada, Kazuhiro Ikai, Shinya Hiraoka, Hiroki Kuramoto, Naoki Tsuno, Toru Umemoto, Hiroyuki Takao
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Publication number: 20170361568Abstract: In the case where a pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer having a refractive index adjustment zone is provided in such a manner that two PET separators are laminated to opposite surfaces of the pressure-sensitive adhesive layer, it is difficult to distinguish between obverse and reverse sides of the pressure-sensitive adhesive sheet itself. The present invention is directed to solving the above problems and, specifically, to offering a pressure-sensitive adhesive sheet having a refractive index adjustment zone capable of being easily produced at low cost, in a state in which it is preliminarily laminated with a substrate provided with an electroconductive layer, thereby making it possible to resolve complexity in handling (to easily distinguish between one surface defined by the refractive index adjustment zone and the other surface defined by the remaining zone).Type: ApplicationFiled: July 11, 2016Publication date: December 21, 2017Applicant: Nitto Denko CorporationInventors: Hirofumi KATAMI, Toru UMEMOTO, Hiroyuki TAKAO, Atsushi YASUI
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Patent number: 9719770Abstract: A touchscreen sensor includes a transparent base material, a first transparent electrode pattern, a first index-matching layer and a first adhesive layer disposed in this order at one side of the transparent base material, and a second transparent electrode pattern, a second index-matching layer and a second adhesive layer disposed in this order at another side of the transparent base material. The first index-matching layer has a refractive index greater than a refractive index of the first adhesive layer. The second index-matching layer has a refractive index greater than a refractive index of the second adhesive layer. Each of the first index-matching layer and the second index-matching layer has a thickness of 85 nm to 120 nm.Type: GrantFiled: October 7, 2014Date of Patent: August 1, 2017Assignee: NITTO DENKO CORPORATIONInventors: Hiroyuki Takao, Toru Umemoto
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Patent number: 9607733Abstract: A double-sided transparent conductive film including a base material film, having an anti-blocking layer, an optical adjusting layer and a transparent conductive layer formed in this order on each of both sides of the base material film, wherein an anti-blocking layer containing particles is formed at least one of: a location between the base material film and one optical adjusting layer; and a location between the base material film and the other optical adjusting layer, the anti-blocking layer has a flat portion and protrusion portions caused by the particles, and a value obtained by subtracting a thickness of the flat portion of the anti-blocking layer from a mode diameter of the particles is larger than a thickness of the optical adjusting layer.Type: GrantFiled: May 20, 2014Date of Patent: March 28, 2017Assignee: NITTO DENKO CORPORATIONInventors: Katsunori Takada, Naoki Hashimoto, Shinya Hiraoka, Kazuhiro Ikai, Hiroki Kuramoto, Hiroyuki Takao, Naoki Tsuno, Toru Umemoto
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Publication number: 20170010709Abstract: Provided are a double-sided transparent conductive film which has blocking resistance and a low reflectance, and is inhibited from scattering reflected light to exhibit good visibility; a roll thereof; and a touch panel.Type: ApplicationFiled: January 29, 2015Publication date: January 12, 2017Applicant: NITTO DENKO CORPORATIONInventors: Naoki HASHIMOTO, Katsunori TAKADA, Kazuhiro IKAI, Shinya HIRAOKA, Hiroki KURAMOTO, Naoki TSUNO, Toru UMEMOTO, Hiroyuki TAKAO
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Patent number: 9454249Abstract: A touchscreen sensor includes a transparent base material, a first index-matching layer, a first transparent electrode pattern, a second index-matching layer and a first adhesive layer disposed in this order at one side of the transparent base material, and a third index-matching layer, a second transparent electrode pattern, a fourth index-matching layer and a second adhesive layer disposed in this order at another side of the transparent base material. Each of the first, second, third and fourth index-matching layers has a refractive index of 1.6 to 1.8 and a thickness of 50 nm to 150 nm.Type: GrantFiled: October 7, 2014Date of Patent: September 27, 2016Assignee: NITTO DENKO CORPORATIONInventors: Hiroyuki Takao, Toru Umemoto
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Patent number: 9387507Abstract: A method for manufacturing a water resistant optically anisotropic film capable of suppressing the generation of a defect such as a crack or separation is provided. The method for manufacturing the water resistant optically anisotropic of the present invention includes a water resistant treatment step of bringing an optically anisotropic film containing an organic dye having an anionic group into contact with a water resistant treatment liquid containing a multivalent cationic compound and a monovalent cationic compound, and the mass ratio of the multivalent cationic compound and the monovalent cationic compound contained in the water resistant treatment liquid, monovalent cationic compound/multivalent cationic compound, is 0.01 to 2.Type: GrantFiled: December 6, 2012Date of Patent: July 12, 2016Assignee: NITTO DENKO CORPORATIONInventors: Toru Umemoto, Satoshi Hirata, Sadahiro Nakanishi, Shoichi Matsuda, Tadayuki Kameyama
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Patent number: 9348074Abstract: A method for producing an optical laminate including a film substrate and a polarizing layer which comprises the steps of: (A) laminating a re-releasable film on one main surface of the film substrate to obtain a laminate film substrate; B) performing a rubbing treatment on the other main surface of the film substrate of the laminate film substrate; C) coating the rubbing-treated surface of the film substrate with a solution containing a lyotropic liquid crystal compound and a solvent; and D) detaching the re-releasable film from the laminate film substrate.Type: GrantFiled: April 5, 2012Date of Patent: May 24, 2016Assignee: NITTO DENKO CORPORATIONInventors: Yoshiaki Asanoi, Toru Umemoto, Shoichi Matsuda, Tadayuki Kameyama
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Publication number: 20160115357Abstract: A pressure-sensitive adhesive sheet comprises a support and a transparent pressure-sensitive adhesive layer on the support. The pressure-sensitive adhesive layer comprises a base adhesive zone made essentially of a transparent base pressure-sensitive adhesive material and formed over a given range from a first principal surface of the pressure-sensitive adhesive layer in a thickness direction of the pressure-sensitive adhesive layer, and a transparent, adherent, refractive index-adjusting zone formed over a given range from a second principal surface of the pressure-sensitive adhesive layer in the thickness direction, and wherein the refractive index-adjusting zone has a refractive index greater than a refractive index of the base pressure-sensitive adhesive material.Type: ApplicationFiled: January 16, 2015Publication date: April 28, 2016Inventors: Hirofumi KATAMI, Toru UMEMOTO, Hiroyuki TAKAO, Takahiro NONAKA, Atsushi YASUI, Takami HIKITA
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Publication number: 20160084991Abstract: A laminate of optical elements comprises a transparent first optical element, a second optical element, and a transparent pressure-sensitive adhesive layer for bonding the first optical element to the second optical element. The pressure-sensitive adhesive layer comprises a base adhesive zone, a transparent refractive index-adjusting zone. The base adhesive zone is made essentially of a transparent base pressure-sensitive adhesive material and formed over a given range from a first principal surface of the pressure-sensitive adhesive layer facing the first optical element, in a thickness direction of the pressure-sensitive adhesive layer. The a transparent, adherent, refractive index-adjusting zone is formed over a given range from a second principal surface of the pressure-sensitive adhesive layer facing the second optical element.Type: ApplicationFiled: January 16, 2015Publication date: March 24, 2016Inventors: Toru UMEMOTO, Hirofumi KATAMI, Hiroyuki TAKAO, Takahiro NONAKA, Atsushi YASUI, Takami HIKITA
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Patent number: 9156060Abstract: The present invention provides a method for producing a waterproof organic thin film being capable of restraining the generation of defects such as a crack. The method for producing a waterproof organic thin film includes a waterproofing step of preparing a long laminate having an organic thin film and bringing at least the organic thin film into contact with a waterproofing-treatment liquid, a washing step of washing at least the organic thin film surface of the long laminate, and a conveying step to be performed between the waterproofing step and the washing step, the conveying step being a step of conveying the long laminate from the waterproofing step to the washing step, wherein in the conveying step, the long laminate is conveyed while the waterproofing-treatment liquid remaining on the organic thin film surface is caused to flow relatively to the organic thin film surface.Type: GrantFiled: February 8, 2013Date of Patent: October 13, 2015Assignee: NITTO DENKO CORPORATIONInventors: Hiroshi Tomohisa, Toru Umemoto, Shoichi Matsuda, Tadayuki Kameyama
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Publication number: 20150141629Abstract: The present invention relates to a water-resistant organic thin film obtained by crosslinking, with organic nitrogen compounds, an organic thin film comprising an organic dye having an anionic group, wherein the organic nitrogen compounds are first, second, and third acyclic organic nitrogen compounds each having two or more nitrogen atoms per molecule, wherein the nitrogen atoms of each of the first, second, and third organic nitrogen compounds are each in a cationic group, and the relation A?0.4 nm<B<C is satisfied, wherein A represents a distance (nm) between adjacent nitrogen atoms in the first organic nitrogen compound, B represents a distance (nm) between adjacent nitrogen atoms in the second organic nitrogen compound, and C represents a distance (nm) between adjacent nitrogen atoms in the third organic nitrogen compound.Type: ApplicationFiled: June 10, 2013Publication date: May 21, 2015Applicant: NITTO DENKO CORPORATIONInventors: Hiroshi Tomohisa, Toru Umemoto, Shoichi Matsuda, Tadayuki Kameyama
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Publication number: 20150022222Abstract: A touchscreen sensor includes a transparent base material, a first transparent electrode pattern, a first index-matching layer and a first adhesive layer disposed in this order at one side of the transparent base material, and a second transparent electrode pattern, a second index-matching layer and a second adhesive layer disposed in this order at another side of the transparent base material. The first index-matching layer has a refractive index greater than a refractive index of the first adhesive layer. The second index-matching layer has a refractive index greater than a refractive index of the second adhesive layer. Each of the first index-matching layer and the second index-matching layer has a thickness of 85 nm to 120 nm.Type: ApplicationFiled: October 7, 2014Publication date: January 22, 2015Applicant: NITTO DENKO CORPORATIONInventors: Hiroyuki Takao, Toru Umemoto
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Publication number: 20150022743Abstract: A touchscreen sensor includes a transparent base material, a first index-matching layer, a first transparent electrode pattern, a second index-matching layer and a first adhesive layer disposed in this order at one side of the transparent base material, and a third index-matching layer, a second transparent electrode pattern, a fourth index-matching layer and a second adhesive layer disposed in this order at another side of the transparent base material. Each of the first, second, third and fourth index-matching layers has a refractive index of 1.6 to 1.8 and a thickness of 50 nm to 150 nm.Type: ApplicationFiled: October 7, 2014Publication date: January 22, 2015Applicant: NITTO DENKO CORPORATIONInventors: Hiroyuki Takao, Toru Umemoto