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: 7880834Abstract: Realizes a structure for a transreflective liquid crystal display device in which one pixel is defined by four or more picture elements, the structure providing a high aperture ratio and being suitable for display for which the transmission mode is prioritized. A liquid crystal display device according to the present invention is a transreflective liquid crystal display device, comprising a plurality of picture elements including a first picture element, a second picture element, a third picture element and a fourth picture element for displaying different colors from one another; in which each of the plurality of picture elements includes a transmission area for providing display in a transmission mode and a reflection area for providing display in a reflection mode. Each picture element includes a mesh portion shaped to be meshable with an adjacent picture element; and the reflection area of each picture element is located in the mesh portion.Type: GrantFiled: February 19, 2007Date of Patent: February 1, 2011Assignee: Sharp Kabushiki KaishaInventors: Tokio Taguchi, Kazuhiko Tsuda, Mutsumi Nakajima, Keisuke Yoshida, Junichi Yamada
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Patent number: 7864271Abstract: A display device in which an image with a wide color reproduction range and bright red can be displayed is provided. The display device is a display device such as, for example, a liquid crystal display device, a cathode ray tube, an organic electroluminescent display device, a plasma display panel, and a field emission display. The display device includes a display surface including a pixel having red, green, blue, and yellow sub-pixels, wherein the red sub-pixel preferably has the largest aperture area.Type: GrantFiled: May 31, 2007Date of Patent: January 4, 2011Assignee: Sharp Kabushiki KaishaInventors: Kozo Nakamura, Shun Ueki, Tokio Taguchi, Akiko Itou
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Publication number: 20100291317Abstract: 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: ApplicationFiled: November 7, 2008Publication date: November 18, 2010Inventors: Takao Imaoku, Tokio Taguchi, Hidekazu Hayashi, Kazuhiko Tsuda
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Patent number: 7835080Abstract: An antireflective member has an uneven surface pattern, in which unit structures are arranged in x and y directions at respective periods that are both shorter than the shortest wavelength of an incoming light ray, on the surface of a substrate and satisfies the following Inequality (1): ? ? ? x , y ? min < 1 ni + ni · sin ? ? ? ? ? i max ( 1 ) where ?min is the shortest wavelength of the incoming light ray, ?imax is the largest angle of incidence of the incoming light ray, ni is the refractive index of an incidence medium, ?x is the period of the uneven surface pattern in the x direction, and ?y is the period of the pattern in the y direction. As a result, diffraction of short-wave light components can be reduced in a broad wavelength range.Type: GrantFiled: February 6, 2007Date of Patent: November 16, 2010Assignee: Sharp Kabushiki KaishaInventors: Tokio Taguchi, Shun Ueki, Kozo Nakamura, Kazuhiko Tsuda
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Publication number: 20100284087Abstract: 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: ApplicationFiled: November 19, 2008Publication date: November 11, 2010Applicant: Sharp Kabushiki KaishaInventors: Nobuaki Yamada, Akiyoshi Fujii, Tokio Taguchi, Hidekazu Hayashi
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Publication number: 20100283947Abstract: 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: ApplicationFiled: November 21, 2008Publication date: November 11, 2010Applicant: SHARP KABUSHIKI KAISHAInventors: Yusuke Nishihara, Iori Aoyama, Tokio Taguchi, Akihiro Yamamoto, Masumi Kubo
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Publication number: 20100277677Abstract: A display device in which an image with a wide color reproduction range and bright red can be displayed is provided. The display device is a display device such as, for example, a liquid crystal display device, a cathode ray tube, an organic electroluminescent display device, a plasma display panel, and a field emission display. The display device includes a display surface including a pixel having red, green, blue, and yellow sub-pixels, wherein the red sub-pixel preferably has the largest aperture area.Type: ApplicationFiled: July 13, 2010Publication date: November 4, 2010Applicant: SHARP KABUSHIKI KAISHAInventors: Kozo NAKAMURA, Shun UEKI, Tokio TAGUCHI, Akiko ITOU
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Publication number: 20100272845Abstract: The present invention provides a roller nanoimprint apparatus 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. The present invention is a roller nanoimprint apparatus including a mold roller and continuously transferring nanosized protrusions to a surface of a workpiece filmby 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: ApplicationFiled: July 1, 2010Publication date: October 28, 2010Inventors: Nobuaki Yamada, Akiyoshi Fujii, Hidekazu Hayashi, Tokio Taguchi
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Publication number: 20100258978Abstract: 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: ApplicationFiled: November 19, 2008Publication date: October 14, 2010Inventors: Nobuaki Yamada, Akiyoshi Fujii, Hidekazu Hayashi, Tokio Taguchi
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Publication number: 20100245736Abstract: A light diffusing layer 10 included in a light diffusing sheet and a liquid crystal display device of the present invention includes a plurality of low refractive index regions (second regions) 14 formed of a substance which has a low refractive index (second substance). The shape of each of the low refractive index regions in a cross section perpendicular to the major surface is approximated to an isosceles triangle where the base is on the viewer side and the vertex is on the liquid crystal display panel side. The plurality of low refractive index regions are arranged in a high refractive index region (first region) formed of a high refractive index substance (first substance) at a predetermined pitch P in at least one direction in a plane parallel to the major surface.Type: ApplicationFiled: September 26, 2008Publication date: September 30, 2010Inventors: Yusuke Nishihara, lori Aoyama, Tokio Taguchi, Akihiro Yamamoto, Masumi Kubo
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Publication number: 20100245738Abstract: 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: ApplicationFiled: November 21, 2008Publication date: September 30, 2010Applicant: SHARP KABUSHIKI KAISHAInventors: Yusuke Nishihara, Iori Aoyama, Tokio Taguchi, Akihiro Yamamoto, Masumi Kubo
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Publication number: 20100245737Abstract: A light diffusing layer 10 included in a light diffusing sheet and a liquid crystal display device of the present invention includes a plurality of low refractive index regions (second regions) 14 formed of a substance which has a low refractive index (second substance). The shape of each of the low refractive index regions in a cross section perpendicular to the major surface is approximated to an isosceles triangle where the base is on the viewer side and the vertex is on the liquid crystal display panel side. The plurality of low refractive index regions are arranged in a high refractive index region (first region) formed of a high refractive index substance (first substance) at a predetermined pitch P in at least one direction in a plane parallel to the major surface.Type: ApplicationFiled: September 26, 2008Publication date: September 30, 2010Inventors: Iori Aoyama, Tokio Taguchi, Yusuke Nishihara, Akihiro Yamamoto, Kubo Masumi
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Publication number: 20100194674Abstract: The liquid crystal display device (1) of the present invention includes a liquid crystal display panel (3) and a backlight (2). In the backlight (2), a plurality of plasma tubes (22) are employed as light sources. The backlight (2) includes: a substrate (21) and; an array structure (23) in which the plurality of plasma tubes (22) are provided, in an array, on the substrate (21). A surface of the array structure (23) opposite to a surface facing the substrate (21) serves as a light emitting section (29) that irradiates the liquid crystal display panel (3). Since the backlight includes plasma tubes serving as the light sources, it is possible to achieve a thinner liquid crystal display device that carries out a high-definition image display in spite of its thin thickness.Type: ApplicationFiled: August 27, 2008Publication date: August 5, 2010Inventors: Yusuke Nishihara, Masumi Kubo, Tokio Taguchi, Kenji Okamoto
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Publication number: 20100134733Abstract: 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: ApplicationFiled: August 1, 2008Publication date: June 3, 2010Inventors: Hisashi Watanabe, Tokio Taguchi
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Publication number: 20100091032Abstract: A liquid crystal display device includes a liquid crystal display panel having a pixel defined by at least three sub-pixels including a blue sub-pixel, a backlight which emits, toward the liquid crystal display panel, light that brings a color temperature to a predetermined level when the pixel displays white, and a color tone correction circuit which corrects a color tone of a color displayed by the pixel. When the pixel displays a color containing at least one predetermined color component that is other than a white component and a blue component, the color tone correction circuit performs a correction to set a luminance of the blue sub-pixel lower than an original luminance.Type: ApplicationFiled: September 20, 2007Publication date: April 15, 2010Applicant: SHARP KABUSHIKI KAISHAInventors: Shun Ueki, Kozo Nakamura, Akiko Miyazaki, Tokio Taguchi
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Publication number: 20090273607Abstract: 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: ApplicationFiled: June 5, 2006Publication date: November 5, 2009Applicant: SHARP KABUSHIKI KAISHAInventors: Shun Ueki, Kozo Nakamura, Tokio Taguchi, Akiko Itou
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Publication number: 20090252825Abstract: An antireflective member according to the present invention has an uneven surface pattern, in which unit structures are arranged in x and y directions at respective periods that are both shorter than the shortest wavelength of an incoming light ray, on the surface of a substrate and satisfies the following Inequality (1): ? ? ? x , y ? min < 1 ni + ni · sin ? ? ? ? ? i max ( 1 ) where ?min is the shortest wavelength of the incoming light ray, ?imax is the largest angle of incidence of the incoming light ray, ni is the refractive-index of an incidence medium, ?x is the period of the uneven surface pattern in the x direction, and ?y is the period of the pattern in the y direction. As a result, diffraction of short-wave light components can be reduced in a broad wavelength range.Type: ApplicationFiled: March 26, 2009Publication date: October 8, 2009Applicant: Sharp Kabushiki KaishaInventors: Tokio Taguchi, Shun Ueki, Kozo Nakamura, Kazuhiko Tsuda
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Patent number: 7599021Abstract: A liquid crystal display device includes, from its back surface side towards its front surface side: a polarization selective reflection plate (12) which reflects x-directional linearly polarized light and transmits y-directional linearly polarized light; a first polarizing plate (4) which transmits the x-directional linearly polarized light; a liquid crystal display panel (13); and a second polarizing plate (8) which transmits the y-directional linearly polarized light. The polarization selective reflection plate (12) is arranged only on a back surface side of the liquid crystal display panel (13). The y-directional linearly polarized light incident on the back surface side is reflected from the polarization selective reflection plate (12), there by protecting privacy. The x-directional linearly polarized light transmitted reaches the front surface side, via the first polarizing plate (4), the liquid crystal display panel (13), and the second polarizing plate (8).Type: GrantFiled: July 21, 2004Date of Patent: October 6, 2009Assignee: Sharp Kabushiki KaishaInventors: Kazuhiko Tsuda, Shun Ueki, Kozo Nakamura, Tokio Taguchi
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Publication number: 20090211912Abstract: An antireflective member according to the present invention has an uneven surface pattern, in which unit structures are arranged in x and y directions at respective periods that are both shorter than the shortest wavelength of an incoming light ray, on the surface of a substrate and satisfies the following Inequality (1): ? ? ? x , y ? min < 1 ni + ni · sin ? ? ? ? ? i max ( 1 ) where ?min is the shortest wavelength of the incoming light ray, ?imax is the largest angle of incidence of the incoming light ray, ni is the refractive index of an incidence medium, ?x is the period of the uneven surface pattern in the x direction, and ?y is the period of the pattern in the y direction. As a result, diffraction of short-wave light components can be reduced in a broad wavelength range.Type: ApplicationFiled: March 26, 2009Publication date: August 27, 2009Applicant: Sharp Kabushiki KaishaInventors: Tokio TAGUCHI, Shun UEKI, Kozo NAKAMURA, Kazuhiko TSUDA
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Patent number: 7561231Abstract: A double-sided display which can suitable carry out black display both in a well-lighted place and a dark place is provided. The following members are disposed in the B direction: a first polarizing plate (14) which allows only a linearly polarized light component to pass through; a liquid crystal layer (13) which, when a voltage is applied thereto, optically rotates and causes linearly polarized light in one direction to be linearly polarized light in the other direction, while, when no voltage is applied, does not alter the direction of the linearly polarized light; a polarizing selective reflector (16) which reflects the linearly polarized light in one direction while allows the linearly polarized light in the other direction to pass through; and a second polarizing plate (15) which absorbs the light in one direction while allows the light in the other direction to pass through. The polarizing selective reflector (16) is disposed only in the B direction of the liquid crystal layer (13).Type: GrantFiled: June 1, 2007Date of Patent: July 14, 2009Assignee: Sharp Kabushiki KaishaInventors: Makoto Kanbe, Kazuhiko Tsuda, Kozo Nakamura, Tokio Taguchi, Shun Ueki, Satoru Kishimoto