Patents by Inventor Akiyoshi Fujii
Akiyoshi Fujii 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: 9784889Abstract: An antireflection structure is disclosed which is capable of enhancing designability by adjusting a reflection characteristic of a Moth-eye structure. A display device using the antireflection structure is also disclosed. The antireflection structure according to an embodiment includes a resin base member including, on a surface, an uneven structure in which a height from a bottom part to a top part is equal to or smaller than a visible light wavelength, and a resin layer covering at least a part of the uneven structure, the resin layer covering the bottom part of the uneven structure more thickly than the top part of the uneven structure.Type: GrantFiled: June 14, 2013Date of Patent: October 10, 2017Assignee: SHARP KABUSHIKI KAISHAInventors: Akiyoshi Fujii, Chiaki Minari, Tokio Taguchi, Nobuaki Yamada, Kiyoshi Minoura
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Patent number: 9701927Abstract: A cleaning solution is used, in a transparent antireflective structure that has, on one surface thereof, a plurality of convexities formed at a period equal to or shorter than wavelength in a visible light range, and that prevents, at the one surface, reflection of light entering the one surface, to clean a concavity defining a region between adjacent two of the plural convexities, the cleaning solution having a pH of 10.00 or more.Type: GrantFiled: January 27, 2014Date of Patent: July 11, 2017Assignee: Sharp Kabushiki KaishaInventors: Kyohko Matsuura, Yuhsuke Tsuda, Hidetsugu Matsukiyo, Yuka Utsumi, Akiyoshi Fujii, Takahiro Nakahara, Kiyoshi Minoura, Miho Yamada
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Publication number: 20150361378Abstract: A cleaning solution is used, in a transparent antireflective structure that has, on one surface thereof, a plurality of convexities formed at a period equal to or shorter than wavelength in a visible light range, and that prevents, at the one surface, reflection of light entering the one surface, to clean a concavity defining a region between adjacent two of the plural convexities, the cleaning solution having a pH of 10.00 or more.Type: ApplicationFiled: January 27, 2014Publication date: December 17, 2015Inventors: Kyohko MATSUURA, Yuhsuke TSUDA, Hidetsugu MATSUKIYO, Yuka UTSUMI, Akiyoshi FUJII, Takahiro NAKAHARA, Kiyoshi MINOURA, Miho YAMADA
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Publication number: 20150241603Abstract: Disclosed are an anti-reflection structure, an imprint mold, methods for producing them and a display device capable of achieving appropriate visibility by forming regions different in reflection characteristics mixed in a film including a moth-eye structure, and sufficiently reducing reflection and sufficiently improving transmittance by the moth-eye structure. The anti-reflection structure includes a surface with an uneven structure composed of a transparent body and includes protrusions, the width between the tops of any pair of the adjacent protrusions being equal to or shorter than visible light wavelengths, the anti-reflection structure including a first region including a surface with the uneven structure, and a second region including a surface with a structure composed of a transparent body, the structure being different from the uneven structure and the second region in a plan view having a shape forming at least one selected from the group consisting of characters, symbols, and graphics.Type: ApplicationFiled: June 14, 2013Publication date: August 27, 2015Applicant: SHARP KABUSHIKI KAISHAInventors: Akiyoshi Fujii, Tokio Taguchi
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Publication number: 20150177420Abstract: An antireflection structure is disclosed which is capable of enhancing designability by adjusting a reflection characteristic of a Moth-eye structure. A display device using the antireflection structure is also disclosed. The antireflection structure according to an embodiment includes a resin base member including, on a surface, an uneven structure in which a height from a bottom part to a top part is equal to or smaller than a visible light wavelength, and a resin layer covering at least a part of the uneven structure, the resin layer covering the bottom part of the uneven structure more thickly than the top part of the uneven structure.Type: ApplicationFiled: June 14, 2013Publication date: June 25, 2015Inventors: Akiyoshi Fujii, Chiaki Minari, Tokio Taguchi, Nobuaki Yamada, Kiyoshi Minoura
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Patent number: 8936839Abstract: The present invention provides a display panel with a flat plate in which a member partially provided with a light blocking part is disposed in front of a display panel, and a curable resin therebetween is sufficiently cured even in an area behind the light blocking part. The display panel with a flat plate of the present invention includes: a flat plate provided with a light passing part and a light blocking part; a display panel; and an adhesive layer between the flat plate and the display panel, the adhesive layer being a cured resin layer obtainable by polymerization involving at least one reactive component selected from the group consisting of a (meth)acrylate oligomer, a bicyclic ring-containing (meth)acrylate monomer, and a hydroxyl group-containing (meth)acrylate monomer, a peroxide component, and a primer as reaction materials.Type: GrantFiled: January 18, 2012Date of Patent: January 20, 2015Assignees: Sharp Kabushiki Kaisha, Kyoritsu Chemical & Co., Ltd.Inventors: Akiyoshi Fujii, Tokio Taguchi, Chiaki Minari, Takashi Yoshizawa, Katsuhisa Senda, Kenta Ishino, Eishi Katakami, Tsubasa Shiine
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Patent number: 8917369Abstract: A display device is provided in which reduction of reflected light is realized. Also a multilayer substrate is provided in which light reflectance is reduced even when the substrate has a plurality of layers that differ in refractive index from each other. In the display device of one embodiment, the reflectance of light reflected by the internal structure, of light incident on the internal structure through a display screen, is less than 1.0%. The multilayer substrate of one embodiment includes a first layer and a second layer disposed adjacently to the first layer. The refractive index of the second layer varies continuously from an interface where the second layer is adjacent to the first layer in a direction from the first layer, with the variation being started at a value of the refractive index at the interface where the first layer is adjacent to the second layer.Type: GrantFiled: May 26, 2010Date of Patent: December 23, 2014Assignee: Sharp Kabushiki KaishaInventors: Nobuaki Yamada, Kazuyoshi Sakuragi, Akiyoshi Fujii, Tokio Taguchi
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Patent number: 8890153Abstract: An active matrix substrate is disclosed, enabling to suppress variation in signal voltages among pixel electrodes. An active matrix substrate includes: an insulating substrate; a plurality of pixel electrodes arranged in a matrix on the insulating substrate; and a source wiring extending in a column direction so as to overlap with two pixel electrodes adjacent to each other in a row direction on the insulating substrate. The pixel electrodes and the source wiring are formed in different layers via an insulating film, the source wiring has a main line portion and extension portions extended from both sides of the main line portion, and the extension portion is formed of a transparent conductive material.Type: GrantFiled: November 30, 2010Date of Patent: November 18, 2014Assignee: Sharp Kabushiki KaishaInventor: Akiyoshi Fujii
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Patent number: 8815406Abstract: The present invention provides a display panel equipped with a front plate and a display device, in each of which streak unevenness is sufficiently resolved in the periphery of a display area. The display panel equipped with a front plate of the present invention comprises: a display panel; a front plate; and a cured resin composition layer disposed between the display panel and the front plate, wherein the cured resin composition layer has a loss tangent of 2 or less at 0 to 70° C.Type: GrantFiled: June 14, 2011Date of Patent: August 26, 2014Assignees: Sharp Kabushiki Kaisha, Kyoritsu Chemical Co., Ltd.Inventors: Akiyoshi Fujii, Tokio Taguchi, Chiaki Minari, Takashi Yoshizawa, Katsuhisa Senda, Mitsutoshi Naito, Eishi Katakami, Tsubasa Shiine
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Patent number: 8758589Abstract: An antireflection film of the present invention includes a plurality of first raised portions, each of which has a two-dimensional size of not less than 1 ?m and less than 100 ?m when seen in a direction normal to the film, and a plurality of second raised portions, each of which has a two-dimensional size of not less than 10 nm and less than 500 nm when seen in a direction normal to the film. In at least one embodiment, the antireflection film has a first surface shape or a second surface shape that is inverse to the first surface shape relative to a film surface. In the first surface shape, the second raised portions are provided on the first raised portions and between the plurality of first raised portions, and the elevation angle ? of a surface of the first raised portions relative to the film surface is about 90° or more. The antireflection film of the present invention has a more excellent antiglare function than conventional ones.Type: GrantFiled: June 4, 2009Date of Patent: June 24, 2014Assignee: Sharp Kabushiki KaishaInventors: Hidekazu Hayashi, Tokio Taguchi, Akiyoshi Fujii, Nobuaki Yamada
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Patent number: 8747994Abstract: The present invention provides an anti-reflective film that prevents wavelength dispersion from being applied to light transmitted through an anti-reflective film. The present invention is an anti-reflective film, which reduces reflection of visible light on a surface of a substrate by being mounted on the substrate, has a wavelength dispersion structure for applying first wavelength dispersion to visible light transmitting through the anti-reflective film, and contains a wavelength dispersion material for applying second wavelength dispersion to the visible light transmitting through the anti-reflective film, wherein visible light transmitted through the anti-reflective film has flat transmission wavelength dispersion in a visible light region.Type: GrantFiled: September 1, 2009Date of Patent: June 10, 2014Assignee: Sharp Kabushiki KaishaInventors: Takao Imaoku, Tokio Taguchi, Akiyoshi Fujii, Kazuhiko Tsuda
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Patent number: 8733243Abstract: At least one embodiment of the present invention provides a roller imprinter that allows easy replacement of a transfer roller, and a method of producing an imprinted sheet. In at least one embodiment, a roller imprinter is disclosed for transferring a pattern on a surface of a transfer roller to a surface of a workpiece sheet through rotation of the transfer roller, the roller imprinter including an axis shaft or rotation for the transfer roller, and the axis of the shaft being non-coincident with the rotation axis of the transfer roller.Type: GrantFiled: March 8, 2011Date of Patent: May 27, 2014Assignee: Sharp Kabushiki KaishaInventors: Akiyoshi Fujii, Nobuaki Yamada
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Patent number: 8673193Abstract: A roller nanoimprint apparatus is disclosed which is capable of preventing a workpiece film with nanostructures having been transferred from the mold roller from being uneven in thickness and allowing easy replacement of the mold roller. At least one embodiment of the present invention is directed to a roller nanoimprint apparatus including a mold roller and continuously transferring nanosized protrusions to a surface of a workpiece film by rotating the mold roller, wherein the mold roller is a cylindrical body having an outer circumference surface with nanosized recesses formed thereon, the roller nanoimprint apparatus further includes a fluid container having an elastic film inflatable by injecting fluid into the container, the fluid container being arranged in a region defined by an inner circumference surface of the mold roller, the mold roller is mounted or demounted when the elastic film is shrunken, and the mold roller is supported from the inside when the elastic film is inflated.Type: GrantFiled: November 19, 2008Date of Patent: March 18, 2014Assignee: Sharp Kabushiki KaishaInventors: Nobuaki Yamada, Akiyoshi Fujii, Hidekazu Hayashi, Tokio Taguchi
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Patent number: 8597767Abstract: To provide an optical element having excellent adhesion to a lamination film, a roller nanoimprint apparatus, and a production method of a mold roller are disclosed. In at least one embodiment of the present invention, an optical element includes a nanostructure film including recesses and protrusions in nanometer size formed continuously on a surface of the nanostructure film and a lamination film laminated on the nanostructure film. The nanostructure film includes a nanostructure-free region free from the recesses and protrusions in nanometer size in both ends along a longitudinal direction of the nanostructure film.Type: GrantFiled: November 19, 2008Date of Patent: December 3, 2013Assignee: Sharp Kabushiki KaishaInventors: Nobuaki Yamada, Akiyoshi Fujii, Tokio Taguchi, Hidekazu Hayashi
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Publication number: 20130302539Abstract: The present invention provides a display panel with a flat plate in which a member partially provided with a light blocking part is disposed in front of a display panel, and a curable resin therebetween is sufficiently cured even in an area behind the light blocking part. The display panel with a flat plate of the present invention includes: a flat plate provided with a light passing part and a light blocking part; a display panel; and an adhesive layer between the flat plate and the display panel, the adhesive layer being a cured resin layer obtainable by polymerization involving at least one reactive component selected from the group consisting of a (meth)acrylate oligomer, a bicyclic ring-containing (meth)acrylate monomer, and a hydroxyl group-containing (meth)acrylate monomer, a peroxide component, and a primer as reaction materials.Type: ApplicationFiled: January 18, 2012Publication date: November 14, 2013Applicants: KYORITSU CHEMICAL & CO., LTD., SHARP KABUSHIKI KAISHAInventors: Akiyoshi Fujii, Tokio Taguchi, Chiaki Minari, Takashi Yoshizawa, Katsuhisa Senda, Kenta Ishino, Eishi Katakami, Tsubasa Shiine
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Patent number: 8545708Abstract: A mold of the present invention includes: a flexible polymer film; a curable resin layer provided on a surface of the polymer film; and a porous alumina layer provided on the curable resin layer, the porous alumina layer having an inverted moth-eye structure in its surface, the inverted moth-eye structure having a plurality of recessed portions whose two-dimensional size viewed in a direction normal to the surface is not less than 10 nm and less than 500 nm. According to the present invention, a method for easily forming a flexible moth-eye mold which can be deformed into the form of a roll is provided.Type: GrantFiled: April 26, 2010Date of Patent: October 1, 2013Assignee: Sharp Kabushiki KaishaInventors: Akiyoshi Fujii, Kiyoshi Minoura, Akinobu Isurugi, Hidekazu Hayashi
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Publication number: 20130095339Abstract: The present invention provides a display panel equipped with a front plate and a display device, in each of which streak unevenness is sufficiently resolved in the periphery of a display area. The display panel equipped with a front plate of the present invention comprises: a display panel; a front plate; and a cured resin composition layer disposed between the display panel and the front plate, wherein the cured resin composition layer has a loss tangent of 2 or less at 0 to 70° C.Type: ApplicationFiled: June 14, 2011Publication date: April 18, 2013Inventors: Akiyoshi Fujii, Tokio Taguchi, Chiaki Minari, Takashi Yoshizawa, Katsuhisa Senda, Mitsutoshi Naito, Eishi Katakami, Tsubasa Shiine
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Patent number: 8310621Abstract: An illuminator according to the present invention includes a backlight (110) for emitting light containing first and second polarization components having polarization directions which are orthogonal to each other; and a selective reflection polarizer (120) having a reflectance for the first polarization component which is higher than a transmittance for the first polarization component, and having a transmittance for the second polarization component which is higher than a reflectance for the second polarization component. The selective reflection polarizer (120) includes a transparent substrate (122) and a plurality of metal wires (124) arrayed on the transparent substrate (122). The ratio of a width of the metal wires (124) to a pitch of the metal wires (124) is greater than 30% and equal to or less than 42%, and the backlight (110) has a reflectance of 0.6 or more.Type: GrantFiled: February 10, 2009Date of Patent: November 13, 2012Assignee: Sharp Kabushiki KaishaInventors: Akiyoshi Fujii, Kyohko Azumada
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Publication number: 20120241748Abstract: An active matrix substrate is disclosed, enabling to suppress variation in signal voltages among pixel electrodes. An active matrix substrate includes: an insulating substrate; a plurality of pixel electrodes arranged in a matrix on the insulating substrate; and a source wiring extending in a column direction so as to overlap with two pixel electrodes adjacent to each other in a row direction on the insulating substrate. The pixel electrodes and the source wiring are formed in different layers via an insulating film, the source wiring has a main line portion and extension portions extended from both sides of the main line portion, and the extension portion is formed of a transparent conductive material.Type: ApplicationFiled: November 30, 2010Publication date: September 27, 2012Applicant: SHARP KABUSHIKI KAISHAInventor: Akiyoshi Fujii
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Publication number: 20120147303Abstract: A display device is provided in which reduction of reflected light is realized. Also a multilayer substrate is provided in which light reflectance is reduced even when the substrate has a plurality of layers that differ in refractive index from each other. In the display device of one embodiment, the reflectance of light reflected by the internal structure, of light incident on the internal structure through a display screen, is less than 1.0%. The multilayer substrate of one embodiment includes a first layer and a second layer disposed adjacently to the first layer. The refractive index of the second layer varies continuously from an interface where the second layer is adjacent to the first layer in a direction from the first layer, with the variation being started at a value of the refractive index at the interface where the first layer is adjacent to the second layer.Type: ApplicationFiled: May 26, 2010Publication date: June 14, 2012Applicant: Sharp Kabushiki KaishaInventors: Nobuaki Yamada, Kazuyoshi Sakuragi, Akiyoshi Fujii, Tokio Taguchi