Patents by Inventor Hiroyuki Amemiya
Hiroyuki Amemiya 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: 8891169Abstract: Provided is an optical sheet hardly causing a change in color depending on the observation angle of an image, the optical sheet including a plurality of layers, at least one of the layers being an optical functional sheet layer including prisms arranged in parallel along a surface of the optical sheet such that light is transmittable; and light-absorbing portions arranged in parallel between the prisms in a way to absorb light, at least another one of the layers being a light diffusing material-containing layer with optical diffusing particles dispersed in a base material, and the optical sheet satisfying a relation of NdK <NdR and vdK <vdR, wherein NdK is a refractive index of the base material of the light diffusing material-containing layer, vdK is an Abbe number thereof, NdR is a refractive index of the optical diffusing particles and vdR is an Abbe number thereof.Type: GrantFiled: September 17, 2009Date of Patent: November 18, 2014Assignee: Dai Nippon Printing Co., Ltd.Inventors: Tsuyoshi Kashiwagi, Tetsuya Sadahiro, Hiroyuki Amemiya, Nobuhiko Ichikawa
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Publication number: 20110216416Abstract: There is provided an optical sheet and a display device which hardly cause a change in color depending on the observation angle of an image. The optical sheet comprises a plurality of layers, at least one of the plurality of layers being an optical functional sheet layer which includes prisms arranged in parallel along a surface of the optical sheet in such a way that light is transmittable; and light-absorbing portions arranged in parallel between the prisms in such a way as to absorb light, at least another one of the layers being a light diffusing material-containing layer with optical diffusing particles dispersed in a sheet-shaped base material, and the optical sheet satisfying a relation of NdK<NdR and ?dK<?dR, wherein NdK is a refractive index of the base material of the light diffusing material-containing layer and ?dK is an Abbe number thereof, and NdR is a refractive index of the optical diffusing particles and ?dR is an Abbe number thereof.Type: ApplicationFiled: September 17, 2009Publication date: September 8, 2011Inventors: Tsuyoshi Kashiwagi, Tetsuya Sadahiro, Hiroyuki Amemiya, Nobuhiko Ichikawa
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Publication number: 20070064308Abstract: Disclosed are a fine-pitch and lightweight optical sheet and a production process which can produce the optical sheet very easily at low cost. The optical sheet comprises an optical function layer formed of a thermoplastic resin. The optical function layer has been formed by shaping the surface of the thermoplastic resin into cylindrical lenses, and the pitch of the shaped cylindrical lenses is not more than 150 ?m.Type: ApplicationFiled: November 20, 2006Publication date: March 22, 2007Applicant: Dai Nippon Printing Co., Ltd.Inventors: Hiroyuki Amemiya, Hideaki Yamagata, Hiroyuki Ohtaki
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Publication number: 20060104084Abstract: A view angle controlling sheet to be disposed between the light source and the liquid crystal panel of a liquid crystal display apparatus, wherein the view angle controlling sheet has lens parts having a trapezoidal cross sectional shape arranged by a predetermined interval and the wedge parts between the adjacent lens parts is filled with a light absorbing material such that the wedge part has the top end disposed to the observer side and the bottom surface to the light source side and a light reflection layer provided to at least the bottom surface part on the light source side of the wedge part and with the premise that the angle formed by the slant face portion of the wedge part and the normal of the light output plane is ?, ? is in a range of 3°???15°.Type: ApplicationFiled: November 17, 2005Publication date: May 18, 2006Inventors: Hiroyuki Amemiya, Osamu Watanabe, Nobuhiko Ichikawa, Masahiro Goto
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Publication number: 20060103779Abstract: A view angle controlling sheet to be disposed between the light source and the liquid crystal panel of a liquid crystal display apparatus, wherein the view angle controlling sheet has lens parts having a trapezoidal cross sectional shape arranged by a predetermined interval and the wedge parts between the adjacent lens parts is filled with a light absorbing material such that the wedge part has the top end disposed to the observer side and the bottom surface to the light source side and with the premise that the angle formed by the slant face portion of the wedge part and the normal of the light output plane is ?, ? is in a range of 3°???15°.Type: ApplicationFiled: November 17, 2005Publication date: May 18, 2006Inventors: Hiroyuki Amemiya, Osamu Watanabe, Nobuhiko Ichikawa
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Publication number: 20050052737Abstract: Disclosed are a fine-pitch and lightweight optical sheet and a production process which can produce the optical sheet very easily at low cost. The optical sheet comprises an optical function layer formed of a thermoplastic resin. The optical function layer has been formed by shaping the surface of the thermoplastic resin into cylindrical lenses, and the pitch of the shaped cylindrical lenses is not more than 150 ?m.Type: ApplicationFiled: September 9, 2004Publication date: March 10, 2005Inventors: Hiroyuki Amemiya, Hideaki Yamagata, Hiroyuki Ohtaki
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Patent number: 5908476Abstract: For producing an abrasive tape (11) including a film substrate (2) and a polishing abrasive layer (10) laminated on one surface of the film substrate (2) and having on the outer surface thereof a plurality of recessed parts (9), the film substrate (2) is wrapped partially around the outer peripheral surface of a roll formplate (1) having on the surface thereof a plurality of concavities (5), and, as the roll formplate (1) is rotated, the film substrate (2) is fed thereto. On one hand, an ionizing radiation curing type resin (3) is supplied into the interface between the roll formplate (1) and the film substrate (2) therearound to be formed by the concavities (5), and the recessed parts (9) are formed on the resin surface. During this forming, radiation rays (R) are projected from an ionizing radiation ray source (8) toward the resin (3) thereby to cure the resin (3) and, at the same time, to render the resin (3) and the film substrate (2) into an integral structure.Type: GrantFiled: October 3, 1997Date of Patent: June 1, 1999Assignee: Dai Nippon Printing Co., Ltd.Inventors: Toshikazu Nishio, Hiroyuki Amemiya, Yasuo Nakai, Taiji Ishii, Masahisa Yamaguchi
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Patent number: 5868806Abstract: For producing an abrasive tape (11) including a film substrate (2) and a polishing abrasive layer (10) laminated on one surface of the film substrate (2) and having on the outer surface thereof a plurality of recessed parts (9), the film substrate (2) is wrapped partially around the outer peripheral surface of a roll formplate (1) having on the surface thereof a plurality of concavities (5), and, as the roll formplate (1) is rotated, the film substrate (2) is fed thereto. On one hand, an ionizing radiation curing type resin (3) is supplied into the interface between the roll formplate (1) and the film substrate (2) therearound to be formed by the concavities (5), and the recessed parts (9) are formed on the resin surface. During this forming, radiation rays (R) are projected from an ionizing radiation ray source (8) toward the resin (3) thereby to cure the resin (3) and, at the same time, to render the resin (3) and the film substrate (2) into an integral structure.Type: GrantFiled: August 14, 1997Date of Patent: February 9, 1999Assignee: Dai Nippon Printing Co., Ltd.Inventors: Toshikazu Nishio, Hiroyuki Amemiya, Yasuo Nakai, Taiji Ishii, Masahisa Yamaguchi
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Patent number: 5714218Abstract: An ionizing radiation-curable resin composition which provides a cured product having no yield point in the stress-strain diagram in tension is disclosed. An optical article prepared from the ionizing radiation-curable resin composition and a surface light source using the optical article are also disclosed. The present invention provides an excellent ionizing radiation-curable resin composition, an excellent optical article comprising a cured product of the resin composition, and an excellent surface light source using the optical article, which have high surface hardness and a high refractive index and are free from deformation, permanent sets, and reduction in weather resistance after curing.Type: GrantFiled: August 21, 1995Date of Patent: February 3, 1998Assignees: Dainippon Printing Co., Ltd., Dainippon Ink and Chemicals, Inc.Inventors: Toshikazu Nishio, Hiroshi Kojima, Hisanori Ishida, Kazuko Etou, Hiroyuki Amemiya, Michiko Takeuchi, Eiji Ichinose, Youichi Abe, Hidenobu Ishikawa
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Patent number: 5709598Abstract: For producing an abrasive tape (11) including a film substrate (2) and a polishing abrasive layer (10) laminated on one surface of the film substrate (2) and having on the outer surface thereof a plurality of recessed parts (9), the film substrate (2) is wrapped partially around the outer peripheral surface of a roll formplate (1) having on the surface thereof a plurality of concavities (5), and, as the roll formplate (1) is rotated, the film substrate (2) is fed thereto. On one hand, an ionizing radiation curing type resin (3) is supplied into the interface between the roll formplate (1) and the film substrate (2) therearound to be formed by the said concavities (5), and the recessed parts (9) are formed on the resin surface. During this forming, radiation rays (R) are projected from an ionizing radiation ray source (8) toward the resin (3) thereby to cure the resin (3) and, at the same time, to render the resin (3) and the film substrate (2) into an integral structure.Type: GrantFiled: March 22, 1995Date of Patent: January 20, 1998Assignee: DAI Nippon Printing Co., Ltd.Inventors: Toshikazu Nishio, Hiroyuki Amemiya, Yasuo Nakai, Taiji Ishii, Masahisa Yamaguchi
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Patent number: 5592332Abstract: A lenticular lens has a light transmitting substrate and a plurality of lens elements formed on the light transmitting substrate. The lens elements are defined in such a way that ridges thereof are aligned in parallel with each other, wherein 30.degree..ltoreq..theta..sub.10% .ltoreq.100.degree. and R.ltoreq.20%, where .theta..sub.10% is a diffusing angle range with respect to normal of the one surface in the case that when light is entered from the opposite surface and transmitted from the one surface, the intensity of the light transmitted is equal to or more than 10% of the intensity of the light transmitted in a peak direction of a main lobe; and R is the ratio of side lobes to main lobe. The intensity of side lobes which causes light loss and light stray can be remarkably reduced. Light can be equally and isotropically focused on in a predetermined diffusing angle range.Type: GrantFiled: December 27, 1993Date of Patent: January 7, 1997Assignee: Dai Nippon Printing Co., Ltd.Inventors: Toshikazu Nishio, Yoshiyuki Yamashita, Hiroyuki Amemiya, Michiko Takeuchi, Nobu Masubuchi
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Patent number: 5429857Abstract: A decorative sheet comprises a transparent or translucent base sheet having a rear surface on which protrusion and recess patterns are formed and a bright set-solid print layer or bright pattern print layer formed on a side of the protrusion and recess patterns of the base sheet. Each of the protrusion and recess patterns is composed of parallel lines, continuous curved lines or a combination of the parallel lines and the curved lines each composed of protruded and recessed portions each in form of a groove having a width of 1 to 100 .mu.m. The base sheet has a front surface on which a transparent resin layer may be formed. The transparent resin layer is formed of a hardenable resin. The decorative sheet also comprises the base sheet having a rear surface on which protrusion and recess patterns are formed, grain patterns formed on a side of the protrusion and recess patterns of the base sheet, and a bright set-solid print layer formed on a rear side of the grain patterns.Type: GrantFiled: September 10, 1993Date of Patent: July 4, 1995Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Hiroyuki Amemiya, Hatiro Uekawa, Taizi Ishii
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Patent number: 5270097Abstract: A decorative sheet comprises a transparent or translucent base sheet having a rear surface on which protrusion and recess patterns are formed and a bright set-solid print layer or bright pattern print layer formed on a side of the protrusion and recess patterns of the base sheet. Each of the protrusion and recess patterns is composed of parallel lines, continuous curved lines or a combination of the parallel lines and the curved lines each composed of protruded and recessed portions each in form of a groove having a width of 1 to 100 .mu.m. The base sheet has a front surface on which a transparent resin layer may be formed. The transparent resin layer is formed of a hardenable resin.Type: GrantFiled: March 9, 1990Date of Patent: December 14, 1993Assignee: Dai Nippon Insatsu Kabushiki KaishaInventors: Hiroyuki Amemiya, Hatiro Uekawa, Taizi Ishii