Patents by Inventor Katsuya Fujisawa
Katsuya Fujisawa 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: 10851180Abstract: Provided is a polymer material containing at least one kind of a cellulose derivative having (a) an organosilyl group (the organosilyl group having a first aliphatic group, an unsaturated aliphatic group, or an aromatic group), and (b) an acyl group or a second aliphatic group.Type: GrantFiled: October 6, 2016Date of Patent: December 1, 2020Assignee: KANEKA CORPORATIONInventors: Ryutaro Mukai, Hiroto Koma, Takahiro Yasumoto, Katsuya Fujisawa, Tomohiro Abo
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Publication number: 20180282438Abstract: Provided is a polymer material containing at least one kind of a cellulose derivative having (a) an organosilyl group (the organosilyl group having a first aliphatic group, an unsaturated aliphatic group, or an aromatic group), and (b) an acyl group or a second aliphatic group.Type: ApplicationFiled: October 6, 2016Publication date: October 4, 2018Applicant: KANEKA CORPORATIONInventors: Ryutaro MUKAI, Hiroto KOMA, Takahiro YASUMOTO, Katsuya FUJISAWA, Tomohiro ABO
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Patent number: 8580069Abstract: To provide a method of bonding two materials directly with each other, at least one of which is made of a plastic material, which method is applicable to bonding two materials, with no need to use any bonding agent and without allowing the materials to be exposed to high temperature and/or high pressures. In this method in which a first member made of a plastic material and a second member are bonded together, one surface of the first member to be bonded with the second member is irradiated with energy rays having a quantity of energies not lower than 4 eV, followed by directly bonding the first and second members together without any bonding agent being used.Type: GrantFiled: March 8, 2004Date of Patent: November 12, 2013Assignee: Kuraray Co., Ltd.Inventors: Tatsufumi Watanabe, Junichi Tanaka, Atsushi Nagasawa, Shinji Hiramatsu, Katsuya Fujisawa
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Patent number: 8477267Abstract: A conventional liquid crystal display comprises a number of components, so that a manufacturing cost cannot be reduced. Furthermore, a large-area substrate has problems in shipping. According to this invention, a liquid-crystal panel is prepared by forming individual optically functional films, a TFT device and a light-emitting device on a long thin film and then laminating the film by a transfer process. A base film to be a substrate in a liquid-crystal panel preferably has a thickness of 10 ?m to 200 ?m, a curvature radius of 40 mm or less as a measure of flexibility and a coefficient of thermal expansion of 50 ppm/° C. or less. Furthermore, it more preferably gives a variation of ±5% or less in mechanical and optical properties to a thermal history at 200° C.Type: GrantFiled: November 4, 2010Date of Patent: July 2, 2013Assignees: Kuraray Co., Ltd., Konica Minolta Holdings, Inc., JSR Corporation, Sumitomo Chemical Company Limited, Sumitomo Bakelite Co., Ltd., Dainippon Ink and Chemicals, Inc., Dai Nippon Printing Co., Ltd., Toppan Printing Co., Ltd.Inventors: Katsuya Fujisawa, Tokuo Ikari, Kazuo Genda, Atsushi Kumano, Noboru Oshima, Yoshiki Matsuoka, Toshimasa Eguchi, Shigenori Yamaoka, Yoshiyuki Ono, Hisatomo Yonehara, Tatsumi Takahashi, Motoyuki Suzuki, Akimitsu Tsukuda, Norimasa Sekine, Kazushige Takechi, Ken Sumiyoshi, Ichiro Fujieda, Yasuo Tsuruoka
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Publication number: 20110126975Abstract: A conventional liquid crystal display comprises a number of components, so that a manufacturing cost cannot be reduced. Furthermore, a large-area substrate has problems in shipping. According to this invention, a liquid-crystal panel is prepared by forming individual optically functional films, a TFT device and a light-emitting device on a long thin film and then laminating the film by a transfer process. A base film to be a substrate in a liquid-crystal panel preferably has a thickness of 10 ?m to 200 ?m, a curvature radius of 40 mm or less as a measure of flexibility and a coefficient of thermal expansion of 50 ppm/° C. or less. Furthermore, it more preferably gives a variation of ±5% or less in mechanical and optical properties to a thermal history at 200° C.Type: ApplicationFiled: November 4, 2010Publication date: June 2, 2011Inventors: Katsuya FUJISAWA, Tokuo Ikari, Kazuo Genda, Atsushi Kumano, Noboru Oshima, Yoshiki Matsuoka, Toshimasa Eguchi, Shigenori Yamaoka, Yoshiyuki Ono, Hisatomo Yonehara, Tatsumi Takahashi, Motoyuki Suzuki, Akimitsu Tsukuda, Norimasa Sekine, Kazushige Takechi, Ken Sumiyoshi, Ichiro Fujieda, Yasuo Tsuruoka
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Patent number: 7952802Abstract: Disclosed is an optical device which can be formed as a thinner layer by a simplified manufacturing process at a reduced cost. Specifically, the optical device has a multilayer structure wherein a polyvinyl alcohol- or polyvinylene-base polarizing film (b) and protective films (a and c) are directly laminated on top of another without any adhesive layer including a pressure sensitive adhesive layer interposed therebetween. The protective film (c) on one side is composed of a triacetyl cellulose, an alicyclic polyolefin resin, or an alicyclic acrylic resin, and the protective film (a) on the other side is composed of a triacetyl cellulose, a polycarbonate, a polyethylene terephthalate, a polyethylene naphthalate, a (meth)acrylate resin, an alicyclic polyolefin resin, or an alicyclic acrylic resin.Type: GrantFiled: November 9, 2009Date of Patent: May 31, 2011Assignee: Kuraray Co., Ltd.Inventors: Hirofumi Tanabe, Tatsufumi Watanabe, Katsuya Fujisawa
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Patent number: 7852435Abstract: A conventional liquid crystal display comprises a number of components, so that a manufacturing cost cannot be reduced. Furthermore, a large-area substrate has problems in shipping. According to this invention, a liquid-crystal panel is prepared by forming individual optically functional films, a TFT device and a light-emitting device on a long thin film and then laminating the film by a transfer process. A base film to be a substrate in a liquid-crystal panel preferably has a thickness of 10 ?m to 200 ?m, a curvature radius of 40 mm or less as a measure of flexibility and a coefficient of thermal expansion of 50 ppm/° C. or less. Furthermore, it more preferably gives a variation of ±5% or less in mechanical and optical properties to a thermal history at 200° C.Type: GrantFiled: December 8, 2004Date of Patent: December 14, 2010Assignees: Kuraray Co., Ltd., Konica Minolta Holdings, Inc., JSR Corporation, Sumitomo Chemical Company, Limited, Sumitomo Bakelite Co., Ltd., Dainippon Ink and Chemicals, Inc., Dai Nippon Printing Co., Ltd., Toray Industries, Inc., Toppan Printing Co., Ltd., NEC Corporation, Hitachi Chemical Co., Ltd.Inventors: Katsuya Fujisawa, Tokuo Ikari, Kazuo Genda, Atsushi Kumano, Noboru Oshima, Yoshiki Matsuoka, Toshimasa Eguchi, Shigenori Yamaoka, Yoshiyuki Ono, Hisatomo Yonehara, Tatsumi Takahashi, Motoyuki Suzuki, Akimitsu Tsukuda, Norimasa Sekine, Kazushige Takechi, Ken Sumiyoshi, Ichiro Fujieda, Yasuo Tsuruoka
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Publication number: 20100051192Abstract: Disclosed is an optical device which can be formed as a thinner layer by a simplified manufacturing process at a reduced cost. Specifically, the optical device has a multilayer structure wherein a polyvinyl alcohol- or polyvinylene-base polarizing film (b) and protective films (a and c) are directly laminated on top of another without any adhesive layer including a pressure sensitive adhesive layer interposed therebetween. The protective film (c) on one side is composed of a triacetyl cellulose, an alicyclic polyolefin resin, or an alicyclic acrylic resin, and the protective film (a) on the other side is composed of a triacetyl cellulose, a polycarbonate, a polyethylene terephthalate, a polyethylene naphthalate, a (meth)acrylate resin, an alicyclic polyolefin resin, or an alicyclic acrylic resin.Type: ApplicationFiled: November 9, 2009Publication date: March 4, 2010Applicant: KURARAY CO. LTD.Inventors: Hirofumi TANABE, Tatsufumi Watanabe, Katsuya Fujisawa
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Publication number: 20070159576Abstract: Disclosed is an optical device which can be formed as a thinner layer by a simplified manufacturing process at a reduced cost. Specifically, the optical device has a multilayer structure wherein a polyvinyl alcohol- or polyvinylene-base polarizing film (b) and protective films (a and c) are directly laminated on top of another without any adhesive layer including a pressure sensitive adhesive layer interposed therebetween. The protective film (c) on one side is composed of a triacetyl cellulose, an alicyclic polyolefin resin, or an alicyclic acrylic resin, and the protective film (a) on the other side is composed of a triacetyl cellulose, a polycarbonate, a polyethylene terephthalate, a polyethylene naphthalate, a (meth)acrylate resin, an alicyclic polyolefin resin, or an alicyclic acrylic resin.Type: ApplicationFiled: March 4, 2005Publication date: July 12, 2007Applicant: KURARAY CO. LTD.Inventors: Hirofumi Tanabe, Tatsufumi Watanabe, Katsuya Fujisawa
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Publication number: 20060279679Abstract: A conventional liquid crystal display comprises a number of components, so that a manufacturing cost cannot be reduced. Furthermore, a large-area substrate has problems in shipping. According to this invention, a liquid-crystal panel is prepared by forming individual optically functional films, a TFT device and a light-emitting device on a long thin film and then laminating the film by a transfer process. A base film to be a substrate in a liquid-crystal panel preferably has a thickness of 10 ?m to 200 ?m, a curvature radius of 40 mm or less as a measure of flexibility and a coefficient of thermal expansion of 50 ppm/° C. or less. Furthermore, it more preferably gives a variation of ±5% or less in mechanical and optical properties to a thermal history at 200° C.Type: ApplicationFiled: December 8, 2004Publication date: December 14, 2006Inventors: Katsuya Fujisawa, Tokuo Ikari, Kazuo Genda, Atsushi Kumano, Noboru Oshima, Yoshiki Matsuoka, Toshimasa Eguchi, Shigenori Yamaoka, Yoshiyuki Ono, Hisatomo Yonehara, Tatsumi Takahashi, Motoyuki Suzuki, Akimitsu Tsukuda, Norimasa Sekine, Kazushige Takechi, Ken Sumiyoshi, Ichiro Fujieda, Yasuo Tsuruoka
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Publication number: 20060237128Abstract: To provide a method of bonding two materials directly with each other, at least one of which is made of a plastic material, which method is applicable to bonding two materials, with no need to use any bonding agent and without allowing the materials to be exposed to high temperature and/or high pressures. In this method in which a first member made of a plastic material and a second member are bonded together, one surface of the first member to be bonded with the second member is irradiated with energy rays having a quantity of energies not lower than 4 eV, followed by directly bonding the first and second members together without any bonding agent being used.Type: ApplicationFiled: March 8, 2004Publication date: October 26, 2006Applicant: Kuraray Co., Ltd.Inventors: Tatsufumi Watanabe, Junichi Tanaka, Atsushi Nagasawa, Shinji Hiramatsu, Katsuya Fujisawa
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Patent number: 6992831Abstract: The invention relates to a lens sheet applicable to a screen for a pixel type projection TV characterized in high quality and definition and a simple producing method thereof. The inventive lens sheet has a shielding layer without any axial misalignment at front and rear sides. The lens sheet comprises a lens portion with a plurality of lens elements arranged in at least one side and a shielding layer provided in a non-transmitting portion of a light radiation plane, in which the shielding layer is provided on a layer made of a cured photo-curing composition (A). The photo-curing composition (A) is composed of 100 weight parts of photo-curing resin composition (a) having a surface free energy of 30 mN/m or more and 0.01 to 10 weight parts of compound (b) having a surface free energy of 25 mN/m or less.Type: GrantFiled: April 19, 2004Date of Patent: January 31, 2006Assignee: Kuraray Co., Ltd.Inventors: Atsushi Nagasawa, Takahiro Kitano, Katsuya Fujisawa, Junichi Tanaka, Tatsufumi Watanabe
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Publication number: 20040196560Abstract: The invention relates to a lens sheet applicable to a screen for a pixel type projection TV characterized in high quality and definition and a simple producing method thereof. The inventive lens sheet has a shielding layer without any axial misalignment at front and rear sides. The lens sheet comprises a lens portion with a plurality of lens elements arranged in at least one side and a shielding layer provided in a non-transmitting portion of a light radiation plane, in which the shielding layer is provided on a layer made of a cured photo-curing composition (A). The photo-curing composition (A) is composed of 100 weight parts of photo-curing resin composition (a) having a surface free energy of 30 mN/m or more and 0.01 to 10 weight parts of compound (b) having a surface free energy of 25 mN/m or less.Type: ApplicationFiled: April 19, 2004Publication date: October 7, 2004Applicant: KURARAY CO., LTD.Inventors: Atsushi Nagasawa, Takahiro Kitano, Katsuya Fujisawa, Junichi Tanaka, Tatsufumi Watanabe
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Patent number: 6798576Abstract: The invention relates to a lens sheet applicable to a screen for a pixel type projection TV characterized in high quality and definition and a simple producing method thereof. The inventive lens sheet has a shielding layer without any axial misalignment at front and rear sides. The lens sheet comprises a lens portion with a plurality of lens elements arranged in at least one side and a shielding layer provided in a non-transmitting portion of a light radiation plane, in which the shielding layer is provided on a layer made of a cured photo-curing composition (A). The photo-curing composition (A) is composed of 100 weight parts of photo-curing resin composition (a) having a surface free energy of 30 mN/m or more and 0.01 to 10 weight parts of compound (b) having a surface free energy of 25 mN/m or less.Type: GrantFiled: June 13, 2002Date of Patent: September 28, 2004Assignee: Kuraray Co., Ltd.Inventors: Atsushi Nagasawa, Takahiro Kitano, Katsuya Fujisawa, Junichi Tanaka, Tatsufumi Watanabe
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Patent number: 6610372Abstract: This invention aims to make it possible to obtain curing surfaces with different surface free energies, and to provide a method of curing an ionizing radiation curing resin composition which can be used as a coating material. Further, it aims to provide a surface modification method which permits surfaces of different surface free energy to be obtained. The above object is achieved by a method of curing a mixture comprising an ionizing radiation curing resin, characterized in that at least part of a mixture comprising 0.01-10 weight parts of a compound (b) having a surface free energy not exceeding 25 mN/m relative to 100 weight parts of an ionizing radiation curing resin composition (a) having a surface free energy of at least 30 mN/m, is cured by irradiating it with ionizing radiation in contact with a medium having a surface free energy higher than that of the ionizing radiation curing resin composition (a).Type: GrantFiled: February 19, 2002Date of Patent: August 26, 2003Assignee: Kuraray Co., Ltd.Inventors: Atsushi Nagasawa, Takahiro Kitano, Keiji Kubo, Katsuya Fujisawa
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Publication number: 20030002161Abstract: The invention relates to a lens sheet applicable to a screen for a pixel type projection TV characterized in high quality and definition and a simple producing method thereof. The inventive lens sheet has a shielding layer without any axial misalignment at front and rear sides. The lens sheet comprises a lens portion with a plurality of lens elements arranged in at least one side and a shielding layer provided in a non-transmitting portion of a light radiation plane, in which the shielding layer is provided on a layer made of a cured photo-curing composition (A). The photo-curing composition (A) is composed of 100 weight parts of photo-curing resin composition (a) having a surface free energy of 30 mN/m or more and 0.01 to 10 weight parts of compound (b) having a surface free energy of 25 mN/m or less.Type: ApplicationFiled: June 13, 2002Publication date: January 2, 2003Applicant: Kuraray Co., Ltd.Inventors: Atsushi Nagasawa, Takahiro Kitano, Katsuya Fujisawa, Junichi Tanaka, Tatsufumi Watanabe
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Publication number: 20020155228Abstract: This invention aims to make it possible to obtain curing surfaces with different surface free energies, and to provide a method of curing an ionizing radiation curing resin composition which can be used as a coating material. Further, it aims to provide a surface modification method which permits surfaces of different surface free energy to be obtained. The above object is achieved by a method of curing a mixture comprising an ionizing radiation curing resin, characterized in that at least part of a mixture comprising 0.01-10 weight parts of a compound (b) having a surface free energy not exceeding 25 mN/m relative to 100 weight parts of an ionizing radiation curing resin composition (a) having a surface free energy of at least 30 mN/m, is cured by irradiating it with ionizing radiation in contact with a medium having a surface free energy higher than that of the ionizing radiation curing resin composition (a).Type: ApplicationFiled: February 19, 2002Publication date: October 24, 2002Applicant: KURARAY CO., LTD.Inventors: Atsushi Nagasawa, Takahiro Kitano, Keiji Kubo, Katsuya Fujisawa
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Patent number: 6425675Abstract: A planar light source device includes a light source 2, a reflector shade 8, a light guide member 3 having at least one side face 1 positioned adjacent the light source for receiving light from the light source and reflected by the reflector shade, and a light output plate 4 positioned adjacent the light guide member 3 with a first surface positioned adjacent a light exit surface of the light guide member 3. The first surface is formed with a multiplicity of projections 7 having respective tips held in tight contact with the light exit surface of the light guide member 3, at least a portion of each of the projections 7 having a curved facet. Of a function descriptive of a sectional shape of each of the projections 7 that is parallel to a direction of travel of light and also a direction normal to the light output plate 4, the maximum value of the absolute value of a linear differential of a portion representative of a facet counter to the light source is chosen to be within the range of 1 to 3.Type: GrantFiled: April 25, 2001Date of Patent: July 30, 2002Assignee: Kuraray Co., Ltd.Inventors: Ikuo Onishi, Katsuya Fujisawa, Isao Hamashima, Shinji Hiramatsu, Yoichi Hashimoto
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Publication number: 20010053074Abstract: A planar light source device includes a light source 2, a reflector shade 8, a light guide member 3 having at least one side face 1 positioned adjacent the light source for receiving light from the light source and reflected by the reflector shade, and a light output plate 4 positioned adjacent the light guide member 3 with a first surface positioned adjacent a light exit surface of the light guide member 3. The first surface is formed with a multiplicity of projections 7 having respective tips held in tight contact with the light exit surface of the light guide member 3, at least a portion of each of the projections 7 having a curved facet. Of a function descriptive of a sectional shape of each of the projections 7 that is parallel to a direction of travel of light and also a direction normal to the light output plate 4, the maximum value of the absolute value of a linear differential of a portion representative of a facet counter to the light source is chosen to be within the range of 1 to 3.Type: ApplicationFiled: April 25, 2001Publication date: December 20, 2001Applicant: KURARAY CO., LTD.Inventors: Ikuo Onishi, Katsuya Fujisawa, Isao Hamashima, Shinji Hiramatsu, Yoichi Hashimoto
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Patent number: 6086212Abstract: Provided is a panel light source device through which the light availability is increased. The luminance of light to be outputted by the device in the oblique direction that oversteps the front direction of the device is reduced. The device comprises a light source 2, a reflector 8, a waveguide 3 that receives through its side surfaces the light having been outputted by the light source 2 and reflected by the reflector 8, an output light modulator 6 as provided on the light output surface of the waveguide 3 to modulate the output light from the light output surface of the waveguide 3 toward the front direction of the light output surface, and an input light modulator 9 as provide between the light source 2 and the side surface of the waveguide 3 to modulate the output light from the light source 2 toward the light output surface of the waveguide 3 or toward the back surface of the waveguide 3 opposite to the light output surface thereof.Type: GrantFiled: September 3, 1998Date of Patent: July 11, 2000Assignee: Kuraray Co., Ltd.Inventors: Ikuo Onishi, Katsuya Fujisawa, Rikuji Watanabe, Toshiyuki Yoshikawa