Patents by Inventor Tokio Taguchi
Tokio Taguchi 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: 8405804Abstract: A liquid crystal display device of an embodiment of the present invention includes a liquid crystal layer, a specular reflection layer, the polarization layer disposed on the viewer's side, a retardation layer interposed between the liquid crystal layer and the polarization layer, and a light scattering layer disposed on the viewer's side of the polarization layer. The light scattering layer has a scattering surface. The scattering surface includes a macro uneven structure which has light scatterability and a micro uneven structure which is superimposedly formed over the macro uneven structure and which is smaller than visible light wavelengths.Type: GrantFiled: August 1, 2008Date of Patent: March 26, 2013Assignee: Sharp Kabushiki KaishaInventors: Hisashi Watanabe, Tokio Taguchi
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Publication number: 20130057958Abstract: The laminate of an embodiment is a laminate including an antireflection film and a protection film bonded onto the antireflection film, wherein the surface of the antireflection film includes a plurality of protrusions; the protection film includes a supporting film and an adhesive layer; the adhesive layer includes an adhesive agent, a copolymer, and a carboxyl group-containing monomer; the weight average molecular weight of the copolymer is 1000000 or more and 2000000 or less; the copolymer includes the (meth)acrylic acid alkyl ester with the alkyl group having 4 or less carbon atoms in the largest weight proportion among the monomer components; the acid number of the copolymer is 16 mg KOH/g or more and 120 mg KOH/g or less; and the mixing amount of the epoxy cross-linking agent in relation to 100 parts by weight of the copolymer is 1.5 parts by weight or more.Type: ApplicationFiled: April 6, 2011Publication date: March 7, 2013Applicants: SOKEN CHEMICAL & ENGINEERING CO., LTD., SHARP KABUSHIKI KAISHAInventors: Kiyoshi Minoura, Takao Imaoku, Tokio Taguchi, Seiichi Shimizu, Ryuta Ooka
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Patent number: 8384862Abstract: A method is disclosed for efficiently producing a nanoimprint film with high-accurately formed nanostructures even if a base on which the nanoimprint film is formed is capable of absorbing UV light. The production method of at least one embodiment of the present invention is a production method of a nanoimprint film formed on a base, the nanoimprint film having a surface with nanosized protrusions and recesses formed thereon. In at least one embodiment, the production method includes a first step of applying a UV-curable resin on a base containing a UV-absorbing component to form a film; a second step of irradiating the film with UV light from a top-side surface of the film to form a semi-cured film; a third step of imprinting nanosized protrusions and recesses on the semi-cured film to form a film having a surface with protrusions and recesses formed thereon; and a fourth step of curing the film with protrusions and recesses to form a nanoimprint film.Type: GrantFiled: November 7, 2008Date of Patent: February 26, 2013Assignee: Sharp Kabushiki KaishaInventors: Takao Imaoku, Tokio Taguchi, Hidekazu Hayashi, Kazuhiko Tsuda
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Patent number: 8384856Abstract: A color filter substrate and a display device are each capable of reducing color separation of a straight line displayed with a mixed color and particularly color separation of a straight white line displayed with a mixed color on a black background. The color filter substrate is a color filter substrate including colored layers of at least four colors, arrayed inside a pixel region, wherein at least one pair of colored layers that are not next to each other when the colored layers of all the colors are arrayed in order of hue is adjacently arranged to each other inside the pixel region.Type: GrantFiled: March 30, 2006Date of Patent: February 26, 2013Assignee: Sharp Kabushiki KaishaInventors: Akiko Itou, Kohzoh Nakamura, Shun Ueki, Tokio Taguchi
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Patent number: 8384998Abstract: An antireflection film is provided in which a light scattering property is suppressed. In at least one example embodiment, the antireflection film includes, on a surface thereof, a moth-eye structure including a plurality of convex portions such that a width between vertices of adjacent convex portions is no greater than a wavelength of visible light. In at least one example embodiment of this antireflection film, the moth-eye structure does not include a sticking structure formed when tip end portions of the convex portions are joined to each other.Type: GrantFiled: December 9, 2011Date of Patent: February 26, 2013Assignee: Sharp Kabushiki KaishaInventors: Tokio Taguchi, Takao Imaoku
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Publication number: 20130011611Abstract: The present invention provides a laminate including an anti-reflection film and a protective film that is stuck on the surface of the anti-reflection film. The protective film is excellent in temporary adhesiveness and can be removed to leave few adhesives. The laminate of the present invention directs to a laminate comprising an anti-reflection film; and a protective film stuck on the anti-reflection film, wherein the surface of the anti-reflection film has multiple protrusions, the distance between two tips of adjacent protrusions being equal to or smaller than visible light wavelength, and the protective film includes a support film and an adhesive layer that is in contact with the anti-reflection film, the adhesive layer including an adhesive that contains a polymer having an olefin structure as a monomer unit.Type: ApplicationFiled: March 4, 2011Publication date: January 10, 2013Inventors: Tokio Taguchi, Takao Imaoku, Kiyoshi Minoura, Shigetaka Ikemoto, Kenji Hayakawa, Naoya Nishizaki, Yuhichi Yachiyama
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Patent number: 8319791Abstract: A display device has a pixel that is defined by a plurality of sub-pixels. The sub-pixels include a red sub-pixel representing red, a green sub-pixel representing green, a blue sub-pixel representing blue and a yellow sub-pixel representing yellow. When the pixel represents white, the luminance of the red sub-pixel is lower than its luminance corresponding to the highest gray scale level. In one embodiment, when the pixel represents white, the luminance of the red sub-pixel is preferably in the range of 25% to 96% of its luminance corresponding to the highest gray scale level. Also, the color temperature of white represented by the pixel is preferably higher than 4200 K, more preferably higher than 5000 K.Type: GrantFiled: June 5, 2006Date of Patent: November 27, 2012Assignee: Sharp Kabushiki KaishaInventors: Shun Ueki, Kozo Nakamura, Tokio Taguchi, Akiko Itou
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Patent number: 8300185Abstract: A liquid crystal display device of the present invention includes: a liquid crystal display panel; and first and second light diffusing layers, each of which has a first major surface and a second major surface and each of which is arranged such that the first major surface opposes a viewer side surface of the liquid crystal display panel. Each of the first and second light diffusing layers includes a first region formed of a first substance which has a first refractive index N1 and a plurality of second regions formed of a second substance which has a second refractive index N2(<N1). The plurality of second regions are arranged in the first region at a predetermined pitch P in one direction in a plane parallel to the second major surface. Each of the plurality of second regions forms a plurality of interfaces with the first region, the interfaces being inclined by ?° from the normal of the second major surface.Type: GrantFiled: November 21, 2008Date of Patent: October 30, 2012Assignee: Sharp Kabushiki KaishaInventors: Yusuke Nishihara, Iori Aoyama, Tokio Taguchi, Akihiro Yamamoto, Masumi Kubo
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Patent number: 8289480Abstract: A liquid crystal display device comprises plural picture elements including a first picture element and a second picture element; plural switching elements; and plural scanning lines. The plural switching elements include a first switching element electrically connected to the first picture element and a second switching element electrically connected to the second picture element. The plural scanning lines include a first scanning line electrically connected to the first switching element and a second scanning line electrically connected to the second switching element. The second scanning line is located between at least part of the first picture element and the first scanning line. The first scanning line is located between at least part of the second picture element and the second scanning line.Type: GrantFiled: December 16, 2010Date of Patent: October 16, 2012Assignee: Sharp Kabushiki KaishaInventors: Tokio Taguchi, Kazuhiko Tsuda, Mutsumi Nakajima, Keisuke Yoshida, Junichi Yamada
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Publication number: 20120234794Abstract: A mold of an embodiment of the present invention has a surface that has a shape which is inverse of a surface shape of a moth-eye structure. This surface has a plurality of protrusions, a plurality of ridges extending between the plurality of protrusions via saddle portions, and a plurality of holes, each of which is defined by at least any three of the plurality of protrusions and ridges extending between the at least any three of the plurality of protrusions, and an average distance between centers of adjacent holes, p, and an average depth of the saddle portions, r, satisfy the relationship of 0.15?r/p?0.60.Type: ApplicationFiled: November 25, 2010Publication date: September 20, 2012Applicant: SHARP KABUSHIKI KAISHAInventors: Akinobu Isurugi, Kiyoshi Minoura, Tokio Taguchi, Takao Imaoku
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Patent number: 8262382Abstract: A stamper, used for fabricating an antireflective member, has an uneven surface pattern, which includes a plurality of very small recessed portions, each having a stepped side surface.Type: GrantFiled: March 26, 2009Date of Patent: September 11, 2012Assignee: Sharp Kabushiki KaishaInventors: Tokio Taguchi, Shun Ueki, Kozo Nakamura, Kazuhiko Tsuda
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Publication number: 20120200932Abstract: A mold includes an anodized porous alumina layer over its surface. The anodized porous alumina layer has a plurality of first and second recessed portions. The plurality of second recessed portions have a two-dimensional size of not less than 190 nm and not more than 50 ?m when viewed in a direction normal to the mold surface and have a plurality of minute recessed portions over its inner surface. The plurality of minute recessed portions have a two-dimensional size of not less than 10 nm and not more than 200 nm; and have a two-dimensional size of not less than 10 nm and not more than 200 nm. The plurality of first recessed portions are provided between the plurality of second recessed portions. The average value of the two-dimensional size of the plurality of second recessed portions is greater than that of the plurality of first recessed portions.Type: ApplicationFiled: October 12, 2010Publication date: August 9, 2012Applicant: SHARP KABUSHIKI KAISHAInventors: Chiaki Minari, Tokio Taguchi
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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
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Publication number: 20120134023Abstract: Provided is a structure with an observation port. The structure with the observation port is provided with the observation port and an internal structure. The internal structure is located to the backside of the observation port and has a third reflection preventing film. The first reflection preventing film is a film that reduces reflected light by using light interference. Each of the second and third reflection preventing films has a surface comprising a plurality of convex portions, a distance between apexes of each adjacent two of which does not exceed the visible light wavelengths. Light obtained by combining light reflected by the surface of the first reflection preventing film, light reflected by the surface of the second reflection preventing film, and light reflected by the surface of the third reflection preventing film has a flat wavelength dispersion within the visible light range.Type: ApplicationFiled: April 30, 2010Publication date: May 31, 2012Applicant: SHARP KABUSHIKI KAISHAInventors: Takao Imaoku, Tokio Taguchi
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Publication number: 20120087012Abstract: Disclosed are: an optical film which has a moth eye structure; a method for producing the optical film; and a method for controlling the optical characteristics of the optical film. An embodiment discloses an optical film having a moth eye structure that includes a plurality of projections, wherein the plurality of projections include a plurality of slanted projections that are inclined to a film surface and the plurality of slanted projections are inclined in a generally same direction when the film surface is viewed in plan. Also disclosed is a method for producing an optical film having a moth eye structure, including applying a physical force to the moth eye structure. Further specifically disclosed is a method for controlling the optical characteristics of an optical film having a moth eye structure that includes a plurality of projections, the method including applying a physical force to the moth eye structure.Type: ApplicationFiled: March 24, 2010Publication date: April 12, 2012Applicant: SHARP KABUSHIKI KAISHAInventors: Takao Imaoku, Tokio Taguchi
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Patent number: 8154692Abstract: A liquid crystal display device of the present invention includes a liquid crystal display panel, and a light diffusing layer which has first and second major surfaces and which is arranged such that the first major surface opposes a viewer side surface of the liquid crystal display panel. The light diffusing layer includes a first region formed of a first substance which has a first refractive index N1 and a plurality of second regions formed of a second substance which has a second refractive index N2 (<N1). The second regions are arranged in the first region at a predetermined pitch P in one direction in a plane parallel to the second major surface, each of the second regions forms interfaces with the first region, the interfaces being inclined by ?° from a normal of the second major surface. ?B which is expressed by ?B=tan?1 (a/Lb) is not more than 1.Type: GrantFiled: November 21, 2008Date of Patent: April 10, 2012Assignee: Sharp Kabushiki KaishaInventors: Yusuke Nishihara, Iori Aoyama, Tokio Taguchi, Akihiro Yamamoto, Masumi Kubo
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Publication number: 20120081793Abstract: An antireflection film is provided in which a light scattering property is suppressed. In at least one example embodiment, the antireflection film includes, on a surface thereof, a moth-eye structure including a plurality of convex portions such that a width between vertices of adjacent convex portions is no greater than a wavelength of visible light. In at least one example embodiment of this antireflection film, the moth-eye structure does not include a sticking structure formed when tip end portions of the convex portions are joined to each other.Type: ApplicationFiled: December 9, 2011Publication date: April 5, 2012Inventors: Tokio TAGUCHI, Takao Imaoku
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Publication number: 20120069443Abstract: An antireflection film is provided in which a light scattering property is suppressed. In at least one example embodiment, the antireflection film includes, on a surface thereof, a moth-eye structure including a plurality of convex portions such that a width between vertices of adjacent convex portions is no greater than a wavelength of visible light. In at least one example embodiment of this antireflection film, the moth-eye structure does not include a sticking structure formed when tip end portions of the convex portions are joined to each other.Type: ApplicationFiled: May 19, 2010Publication date: March 22, 2012Applicant: SHARP KABUSHIKI KAISHAInventors: Tokio Taguchi, Takao Imaoku
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Publication number: 20110315557Abstract: A method of fabricating a motheye mold according to the present invention includes the steps of: (a) anodizing a surface of an aluminum film (10a) via an electrode (32a) that is in contact with the surface, thereby forming a porous alumina layer which has a plurality of very small recessed portions; (b) after step (a), allowing the porous alumina layer to be in contact with an etchant, thereby enlarging the very small recessed portions of the porous alumina layer; and (c) after step (b), further anodizing the surface to grow the plurality of very small recessed portions. The aluminum film is made of aluminum with a purity of 99.99 mass % or higher. The electrode includes a first electrode portion (32a1) which is made of aluminum with a purity of 99.50 mass % or lower and a second electrode portion (32a2) which is made of aluminum with a higher purity than the aluminum of the first electrode portion and which is interposed between the surface and the first electrode portion.Type: ApplicationFiled: March 2, 2010Publication date: December 29, 2011Inventors: Hidekazu Hayashi, Tokio Taguchi, Kazuhiko Tsuda
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Publication number: 20110279745Abstract: Disclosed is a liquid crystal display panel which causes no gray scale inversion, even when obliquely viewed, and which realizes suppression of a gamma characteristics change and a chromaticity change. The liquid crystal display panel is made of a pair of substrates, at least one of which includes a plurality of pixel electrodes containing red, green and blue pixel electrodes, and a liquid crystal layer arranged between the pair of substrates. The liquid crystal layer is divided for each pixel into a first region and a second region, which have liquid crystal molecules different in the directions of inclination from each other. Both of the liquid crystal molecules positioned in the first region and the second region are oriented either vertically or horizontally when the pair of substrates is viewed in the front direction, and are oriented obliquely with respect to the substrate surface and symmetrically of each other when the pair of substrates is viewed in the cross-sectional direction.Type: ApplicationFiled: August 26, 2009Publication date: November 17, 2011Applicant: SHARP KABUSHIKI KAISHAInventors: Akihiro Yamamoto, Yusuke Nishihara, Iori Aoyama, Tokio Taguchi, Masumi Kubo