Patents by Inventor Hiroaki Kishioka
Hiroaki Kishioka 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: 7097903Abstract: A double-sided pressure-sensitive adhesive sheet for fixing a touch panel to a display device wherein one surface of the double-sided pressure-sensitive adhesive sheet is stuck to the surface of the touch panel while the other surface of the double-sided pressure-sensitive adhesive sheet is stuck to a display surface of the display device, the double-sided pressure-sensitive adhesive sheet including: a transparent base; a first transparent pressure-sensitive adhesive layer formed on one surface of the transparent base; and a second transparent pressure-sensitive adhesive layer formed on the other surface of the transparent base; wherein the double-sided pressure-sensitive adhesive sheet is releasable and re-stickable to the display surface while being stuck to the touch panel.Type: GrantFiled: February 20, 2003Date of Patent: August 29, 2006Assignee: Nitto Denko CorporationInventors: Hiroaki Kishioka, Masahiro Ohura
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Publication number: 20060188711Abstract: An object of the present invention is to provide a pressure-sensitive adhesive composition which is excellent in antistatic property of a pressure-sensitive adhesive tapes when separators are peeled off, and has reduced stainability in an adherend, and excellent in transparency, and prevention of occurrence of peeling off and separation, and an antistatic pressure-sensitive adhesive sheet and a double-sided pressure-sensitive adhesive tape using the same. There is provided a pressure-sensitive composition comprising an ionic liquid, a (meth)acryl-based oligomer of weight-average molecular weight of 1,000 to 50,000, and a (meth)acryl-based polymer of glass transition temperature (Tg) of 0° C. or less as base polymer.Type: ApplicationFiled: February 21, 2006Publication date: August 24, 2006Inventors: Hiroaki Kishioka, Tatsumi Amano, Natsuki Ukei
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Publication number: 20050202238Abstract: A transparent double-sided pressure-sensitive adhesive tape or sheet contains a transparent substrate and a transparent pressure-sensitive adhesive layer disposed on each side of the substrate, wherein the transparent pressure-sensitive adhesive layer disposed on at least one side of the transparent substrate is a layer formed from a pressure-sensitive adhesive composition containing a specific acrylic polymer (a) and a specific oligomer (b).Type: ApplicationFiled: March 11, 2005Publication date: September 15, 2005Inventors: Hiroaki Kishioka, Yutaka Tosaki
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Patent number: 6939911Abstract: A pressure-sensitive adhesive composition contains (a) an acrylic polymer containing an alkyl (meth)acrylate whose alkyl group has from 4 to 12 carbon atoms, as a monomer major component and from 1 to 10 parts by weight, based on 100 parts by weight of the whole of the monomer components, of a carboxyl group-containing monomer as a monomer component and having a weight average molecular weight of from 500,000 to 900,000; and (b) an oligomer containing an ethylenically unsaturated monomer, in which a homopolymer formed therefrom has a glass transition temperature of from 60 to 190° C. and which has a cyclic structure, as a monomer major component and from 1 to 10 parts by weight, based on 100 parts by weight of the whole of the monomer components, of a carboxyl group-containing monomer as a monomer component and having a weight average molecular weight of from 3,000 to 6,000.Type: GrantFiled: June 21, 2004Date of Patent: September 6, 2005Assignee: Nitto Denko CorporationInventors: Yutaka Tosaki, Hiroaki Kishioka
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Patent number: 6891530Abstract: A touch panel-including illuminator having: a light pipe made of a transparent plate-like material having an upper surface, a lower surface and at least one incidence side surface, the upper surface being provided with light output means through which light incident on the incidence side surface is made to emerge from the lower surface; a light source disposed on the incidence side surface of the light pipe; an adhesive layer; and a touch panel bonded to the upper surface of the light pipe through the adhesive layer; wherein the light output means are constituted by fine grooves which are disposed discontinuously, each of which is made of a concave portion, and each of which is shaped like an approximate triangle in section; and wherein each of the fine grooves has an optical path changing slope and a steep slope.Type: GrantFiled: April 15, 2002Date of Patent: May 10, 2005Assignee: Nitto Denko CorporationInventors: Seiji Umemoto, Ryoji Kinoshita, Yuuki Nakano, Hiroaki Kishioka, Waka Sakaitani
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Publication number: 20040260009Abstract: A pressure-sensitive adhesive composition contains (a) an acrylic polymer containing an alkyl (meth)acrylate whose alkyl group has from 4 to 12 carbon atoms, as a monomer major component and from 1 to 10 parts by weight, based on 100 parts by weight of the whole of the monomer components, of a carboxyl group-containing monomer as a monomer component and having a weight average molecular weight of from 500,000 to 900,000; and (b) an oligomer containing an ethylenically unsaturated monomer, in which a homopolymer formed therefrom has a glass transition temperature of from 60 to 190° C. and which has a cyclic structure, as a monomer major component and from 1 to 10 parts by weight, based on 100 parts by weight of the whole of the monomer components, of a carboxyl group-containing monomer as a monomer component and having a weight average molecular weight of from 3,000 to 6,000.Type: ApplicationFiled: June 21, 2004Publication date: December 23, 2004Applicant: NITTO DENKO CORPORATIONInventors: Yutaka Tosaki, Hiroaki Kishioka
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Publication number: 20040191509Abstract: A double-sided pressure-sensitive adhesive sheet to be used in sticking and fixing a touch panel to a display surface of a display device is described, one surface of the double-sided pressure-sensitive adhesive sheet being stuck substantially entirely on the touch panel, and the other surface being stuck substantially entirely on the display surface of the display device, wherein the double-sided pressure-sensitive adhesive sheet has at least two adhesive layers but does not have a substrate, is constructed such that it is repeatedly peelable against at least one surface of the touch panel and the display surface of the display device, and has optical isotropy.Type: ApplicationFiled: January 28, 2004Publication date: September 30, 2004Applicant: NITTO DENKO CORPORATIONInventors: Hiroaki Kishioka, Hiroyuki Tsubaki
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Patent number: 6693690Abstract: A lightweight, touch-input-type reflective liquid-crystal display panel having a reflective liquid-crystal display panel. The reflective liquid-crystal display panel being formed in a manner such that external light incident on an outer surface is reflected by the light-reflecting layer so that display light transmitted through the liquid-crystal layer is made to emerge from the visual side cell substrate and viewed.Type: GrantFiled: May 1, 2002Date of Patent: February 17, 2004Assignee: Nitto Denko CorporationInventors: Seiji Umemoto, Yuuki Nakano, Ryoji Kinoshita, Hiroaki Kishioka, Waka Sakaitani
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Publication number: 20030232192Abstract: A double-sided pressure-sensitive adhesive sheet for fixing a touch panel to a display device wherein one surface of the double-sided pressure-sensitive adhesive sheet is stuck to the surface of the touch panel while the other surface of the double-sided pressure-sensitive adhesive sheet is stuck to a display surface of the display device, the double-sided pressure-sensitive adhesive sheet including: a transparent base; a first transparent pressure-sensitive adhesive layer formed on one surface of the transparent base; and a second transparent pressure-sensitive adhesive layer formed on the other surface of the transparent base; wherein the double-sided pressure-sensitive adhesive sheet is releasable and re-stickable to the display surface while being stuck to the touch panel.Type: ApplicationFiled: February 20, 2003Publication date: December 18, 2003Applicant: NITTO DENKO CORPORATIONInventors: Hiroaki Kishioka, Masahiro Ohura
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Patent number: 6599967Abstract: A pressure-sensitive adhesive sheet comprising a layer of a crosslinked pressure-sensitive adhesive, which is formed by 100 parts by weight of a homopolymer or a copolymer of a monomer containing an alkyl (meth)acrylates, as a principal component, 0.001 to 5 parts by weight of a silane-coupling agent, 0.Type: GrantFiled: July 25, 2001Date of Patent: July 29, 2003Assignee: Nitto Denko CorporationInventors: Hiroaki Kishioka, Masahiro Ohura
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Publication number: 20030032715Abstract: An acrylic pressure-sensitive adhesive which gives a pressure-sensitive adhesive layer having a regulate refractive index, in particular, an increased refractive index, and retaining almost intact satisfactory pressure-sensitive adhesive properties. The pressure-sensitive adhesive comprises an acrylic copolymer comprising, as copolymerizable components, an acrylic alkyl ester containing no aromatic ring and a monomer containing an aromatic ring, copolymerization proportion of the monomer containing an aromatic ring in the copolymer being from 40 to 90% by weight based on the weight of all monomer components.Type: ApplicationFiled: June 28, 2002Publication date: February 13, 2003Applicant: NITTO DENKO CORPORATIONInventors: Waka Sakaitani, Hiroaki Kishioka, Seiji Umemoto
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Publication number: 20020180910Abstract: A reflective liquid-crystal display device having a reflective liquid-crystal display panel, at least one light source, an optical path control layer, a transparent touch panel, and a transparent adhesive layer, the reflective liquid-crystal display panel including a liquid-crystal cell and a light-reflecting layer, the liquid-crystal cell having a back side cell substrate, a visual side cell substrate, and a layer of liquid crystal between the two cell substrates, the reflective liquid-crystal display panel being formed in a manner such that external light incident on an outer surface is reflected by the light-reflecting layer so that display light transmitted through the liquid-crystal layer is made to emerge from the visual side cell substrate and viewed, the light source being disposed on at least one of side surfaces of the reflective liquid-crystal display panel, the optical path control layer being disposed on the outer surface side of the visual side cell substrate, the transparent touch panel being bType: ApplicationFiled: May 1, 2002Publication date: December 5, 2002Applicant: NITTO DENKO CORPORATIONInventors: Seiji Umemoto, Yuuki Nakano, Ryoji Kinoshita, Hiroaki Kishioka, Waka Sakaitani
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Publication number: 20020180711Abstract: A touch panel-including illuminator having: a light pipe made of a transparent plate-like material having an upper surface, a lower surface and at least one incidence side surface, the upper surface being provided with light output means through which light incident on the incidence side surface is made to emerge from the lower surface; a light source disposed on the incidence side surface of the light pipe; an adhesive layer; and a touch panel bonded to the upper surface of the light pipe through the adhesive layer; wherein the light output means are constituted by fine grooves which are disposed discontinuously, each of which is made of a concave portion, and each of which is shaped like an approximate triangle in section; and wherein each of the fine grooves has an optical path changing slope and a steep slope.Type: ApplicationFiled: April 15, 2002Publication date: December 5, 2002Applicant: NITTO DENKO CORPORATIONInventors: Seiji Umemoto, Ryoji Kinoshita, Yuuki Nakano, Hiroaki Kishioka, Waka Sakaitani
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Patent number: 6451156Abstract: A pressure-sensitive adhesive sheets comprising a layer of a crosslinked pressure-sensitive adhesive, which is formed by an acrylic polymer made of a homopolymer or copolymer of a monomer containing a (meth)acrylate as a principal component, a silane coupling agent and a crosslinking agent, wherein a sol component of the crosslinked pressure-sensitive adhesive has a weight-average molecular weight of not less than 300,000 and a proportion of a low-molecular component having a molecular weight of not more than 100,000 in the sol component is not more than 15% by weight in the measurement of the molecular weight by the gel permeation chromatography method, which the sheet cause neither lifting nor formation of bubbles at the bonding interface even when exposed to severe conditions such as high temperature or high temperature and humidity in case a functional film is bonded/fixed to a display device, thus making it possible to maintain good appearance for a long period.Type: GrantFiled: February 20, 2001Date of Patent: September 17, 2002Assignee: Nitto Denko CorporationInventors: Hiroaki Kishioka, Masahiro Ohura, Takao Yoshikawa
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Publication number: 20020098352Abstract: A pressure-sensitive adhesive composition which comprises as a main component an acrylic polymer comprising as a monomer unit an aromatic ring-containing copolymerizable monomer, wherein the refractive index of the composition after drying, after curing or after drying and curing is 1.49 or more and 1.60 or less; a pressure-sensitive adhesive sheet used to stick and fix an optical film on the display panel of a display device, wherein a pressure-sensitive adhesive layer comprising the pressure-sensitive adhesive composition is formed on a release liner; and an optical film which comprises an optical film used to stick and fix on the display panel of a display device having formed on one face thereof the pressure-sensitive adhesive layer comprising the pressure-sensitive adhesive composition are described.Type: ApplicationFiled: December 3, 2001Publication date: July 25, 2002Applicant: NITTO DENKO CORPORATIONInventor: Hiroaki Kishioka
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Publication number: 20020037413Abstract: A pressure-sensitive adhesive composition comprising an acrylic polymer as a base polymer and a crosslinking agent, characterized in that said acrylicpolymerh as a weight-average molecular weight of 1,500,000 or above and the proportion of materials having a molecular weight of 100,000 or below in said acrylic polymeris 10% or less, and that the storage modulus at 80° C. of said composition after forming a cross-linked structure is from 5×104 Pa to 5×105 Pa inclusive,which composition is capable of forming an adhesive layer having excellent weather resistance.Type: ApplicationFiled: February 5, 2001Publication date: March 28, 2002Inventors: Hiroaki Kishioka, Jun Harima
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Publication number: 20020035177Abstract: A pressure-sensitive adhesive sheet comprising a layer of a crosslinked pressure-sensitive adhesive, which is formed by 100 parts by weight of a homopolymer or a copolymer of a monomer containing an alkyl (meth)acrylates as a principal component, 0.001 to 5 parts by weight of a silane-coupling agent, 0.Type: ApplicationFiled: July 25, 2001Publication date: March 21, 2002Inventors: Hiroaki Kishioka, Masahiro Ohura
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Patent number: 6299975Abstract: A pressure-sensitive adhesive sheet prepared by coating a composition containing a) 100 parts by weight of monomers composed of from 70 to 100% by weight of a (meth)acrylic acid alkyl ester, said alkyl group having from 2 to 14 carbon atoms, and from 0 to 30% by weight of a monoethylenically unsaturated monomer copolymerizing therewith, b) from 0.1 to 5 parts by weight of a radical chain inhibitor, c) from 0.02 to 5 parts by weight of a polyfunctional (meth)acrylate as a crosslinking agent, d) from 0.005 to 1 part by weight of a photopolymerization initiator, and e) from 0.01 to 10 parts by weight of a silane coupling agent, on a releasing-treated film having a good surface smoothness and photopolymerizing the coated layer to form a pressure-sensitive adhesive layer having a haze value of 1% or lower and a total light transmission of at least 90%.Type: GrantFiled: January 19, 1999Date of Patent: October 9, 2001Assignee: Nitto Denko CorporationInventors: Hitoshi Takahira, Masahiro Oura, Takao Yoshikawa, Hiroaki Kishioka
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Publication number: 20010021452Abstract: A pressure-sensitive adhesive sheets comprising a layer of a crosslinked pressure-sensitive adhesive, which is formed by an acrylic polymer made of a homopolymer or copolymer of a monomer containing a (meth)acrylate as a principal component, a silane coupling agent and a crosslinking agent, wherein a sol component of the crosslinked pressure-sensitive adhesive has a weight-average molecular weight of not less than 300,000 and a proportion of a low-molecular component having a molecular weight of not more than 100,000 in the sol component is not more than 15% by weight in the measurement of the molecular weight by the gel permeation chromatography method, which the sheet cause neither lifting nor formation of bubbles at the bonding interface even when exposed to severe conditions such as high temperature or high temperature and humidity in case a functional film is bonded/fixed to a display device, thus making it possible to maintain good appearance for a long period.Type: ApplicationFiled: February 20, 2001Publication date: September 13, 2001Inventors: Hiroaki Kishioka, Masahiro Ohura, Takao Yoshikawa