Patents by Inventor Hidetoshi Numata
Hidetoshi Numata 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: 8534927Abstract: An interface device includes a flexible substrate portion, a flexible cladding portion arranged on the substrate portion, a flexible single-mode waveguide portion arranged on the cladding portion including a substantially optically transparent material, a first engagement feature operative to engage a portion of a wafer, and a connector portion engaging a first distal end of the flexible substrate portion, the connector portion operative to engage a portion of an optical fiber ferrule.Type: GrantFiled: March 23, 2012Date of Patent: September 17, 2013Assignee: International Business Machines CorporationInventors: Tymon Barwicz, Hidetoshi Numata, Yoichi Taira
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Patent number: 8442362Abstract: An optical coupling structure that interfaces between optical devices mounted on a substrate and optical waveguides formed in the substrate. A manufacturing method includes preparing a wafer formed on an inorganic solid material on a dicing tape and cutting the back surface of the wafer to form substantially angled portions using a dicing blade having a point angle. The dicing tape is stripped from the wafer and the wafer is separated at the valleys between the substantially angled portions to obtain an optical coupling element. The obtained optical coupling element is a three-dimensional polyhedral light-reflecting member having a mirror surface corresponding to a surface of the wafer. The obtained optical coupling element is inserted into a trench that opens, substantially perpendicular to an optical waveguide of an optical transmission substrate, in the main surface of the optical transmission substrate to provide a structure for optical coupling with the outside.Type: GrantFiled: June 26, 2012Date of Patent: May 14, 2013Assignee: International Business Machines CorporationInventors: Shigeru Nakagawa, Hidetoshi Numata, Kuniaki Sueoka, Yoichi Taira
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Publication number: 20120314973Abstract: An information processing apparatus, a calculation method, a program, and a storage medium for generating a uniformly distributed discrete pattern. To calculate a spatial arrangement of a plurality of elements of a discrete pattern, the plurality of elements being arranged in a spatially discrete manner, an information processing apparatus according to the present invention determines, for each of the elements, a density in an initial position given to the element from a density distribution of the elements in a region where the elements are arranged in the discrete pattern and places, for the initial position of each of the elements, a figure having a size corresponding to the density and representing a region where the element repels other elements and a movement range of the figure. The information processing apparatus minimizes an objective function, computes an optimal solution, and outputs the optimal solutions.Type: ApplicationFiled: August 22, 2012Publication date: December 13, 2012Applicant: International Business Machines CorporationInventors: Tsuyoshi Ide, Takashi Imamichi, Hidetoshi Numata
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Publication number: 20120267338Abstract: An optical coupling structure that interfaces between optical devices mounted on a substrate and optical waveguides formed in the substrate. A manufacturing method includes preparing a wafer formed on an inorganic solid material on a dicing tape and cutting the back surface of the wafer to form substantially angled portions using a dicing blade having a point angle. The dicing tape is stripped from the wafer and the wafer is separated at the valleys between the substantially angled portions to obtain an optical coupling element. The obtained optical coupling element is a three-dimensional polyhedral light-reflecting member having a mirror surface corresponding to a surface of the wafer. The obtained optical coupling element is inserted into a trench that opens, substantially perpendicular to an optical waveguide of an optical transmission substrate, in the main surface of the optical transmission substrate to provide a structure for optical coupling with the outside.Type: ApplicationFiled: June 26, 2012Publication date: October 25, 2012Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Shigeru Nakagawa, Hidetoshi Numata, Kuniaki Sueoka, Yoichi Taira
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Publication number: 20120262507Abstract: An information processing apparatus, a calculation method, a program, and a storage medium for generating a uniformly distributed discrete pattern. To calculate a spatial arrangement of a plurality of elements of a discrete pattern, the plurality of elements being arranged in a spatially discrete manner, an information processing apparatus according to the present invention determines, for each of the elements, a density in an initial position given to the element from a density distribution of the elements in a region where the elements are arranged in the discrete pattern and places, for the initial position of each of the elements, a figure having a size corresponding to the density and representing a region where the element repels other elements and a movement range of the figure.Type: ApplicationFiled: April 9, 2012Publication date: October 18, 2012Applicant: International Business Machines CorporationInventors: Tsuyoshi Ide, Takashi Imamichi, Hidetoshi Numata
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Publication number: 20120043678Abstract: A method of forming an optical element for a color display device includes forming a lens shaped die, coating a low refractive index photo-setting resin on the lens shaped die, pasting the lens shaped die to a substrate, and irradiating the coated low refractive index photo-setting resin so as to set the low refractive index resin and form a low refractive index layer. The lens shaped die is removed from the low refractive index layer set on the substrate, a high refractive index photo-setting resin is coated on the low refractive index layer by use of a planarizing die, and the coated high refractive index photo-setting resin is irradiated so as to set the high refractive index resin and form a high refractive index layer. The planarizing die is then from the high refractive index layer set on the low refractive index layer.Type: ApplicationFiled: February 18, 2011Publication date: February 23, 2012Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Hidetoshi Numata, Shinya Ono, Fumiaki Yamada, Yoichi Taira
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Publication number: 20110153283Abstract: A method and apparatus to optimally design the layout of a plurality of optical waveguides in a case where one or more crossings occur due to a planar configuration of optical waveguides. Embodiments include a plurality of default routes are set for all of a plurality of waveguides so that each of a plurality of waveguides bundled at an input end is split into two or more waveguides, one split waveguide, together with another split waveguide, forms one or more crossings, and a plurality of split waveguides are bundled at least two separate places at an output end. The number of crossings existing on each of the routes is counted. The default value (splitting ratio) of the cross section (thickness and shape) of each of one waveguide and a plurality of waveguides split from the one waveguide is set on the basis of the counted number of crossings.Type: ApplicationFiled: December 7, 2010Publication date: June 23, 2011Applicant: International Business Machines CorporationInventors: Sayuri Kohara, Hidetoshi Numata
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Patent number: 7936412Abstract: A color filterless display device performing color display for expressing one pixel by three RGB sub-pixels includes: a light source; a diffraction grating for separating a light irradiated from this light source into lights of a plurality of wavelength regions; a cylindrical lens array for receiving the separated light and condensing the light while corresponding to each of the sub-pixels; and a liquid crystal cell including a structure portion for correcting an angle of the condensed light for all sub-pixels, wherein, in the structure portion of this liquid crystal cell, a side onto which a light from the cylindrical lens array is made incident is made of a high refractive index layer, an emitting side from which the light is emitted is made of a low refractive index layer, and a Fresnel-type microprism structure is formed by the high refractive index layer and the low refractive index layer.Type: GrantFiled: January 9, 2007Date of Patent: May 3, 2011Assignee: International Business Machines CorporationInventors: Hidetoshi Numata, Shinya Ono, Fumiaki Yamada, Yoichi Taira
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Publication number: 20100278485Abstract: An optical coupling structure that interfaces between optical devices mounted on a substrate and optical waveguides formed in the substrate. A manufacturing method includes preparing a wafer formed on an inorganic solid material on a dicing tape and cutting the back surface of the wafer to form substantially angled portions using a dicing blade having a point angle. The dicing tape is stripped from the wafer and the wafer is separated at the valleys between the substantially angled portions to obtain an optical coupling element. The obtained optical coupling element is a three-dimensional polyhedral light-reflecting member having a mirror surface corresponding to a surface of the wafer. The obtained optical coupling element is inserted into a trench that opens, substantially perpendicular to an optical waveguide of an optical transmission substrate, in the main surface of the optical transmission substrate to provide a structure for optical coupling with the outside.Type: ApplicationFiled: April 29, 2010Publication date: November 4, 2010Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Shigeru Nakagawa, Hidetoshi Numata, Kuniaki Sueoka, Yoichi Taira
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Patent number: 7313309Abstract: Optical device and color display unit to correct an angle of visibility, emphasize front brightness or diffusion degree, improve brightness and the performance of angle of visibility, and moreover improve the performance of chromaticity. An optical device is a film-like optical device for angle-correcting light toward a predetermined direction and of two materials whose refractive index difference is at least 0.1 or over, formed so that one material constitutes a plurality of light guide paths having total reflection at the boundary with the adjacent other material, in which the light guide paths are formed so that they are not arranged at equal intervals or they have different cross sections from each other and the ratio of the width or diameter of the light input portion of each of the light guide paths to the film thickness of an optical device is at least 1:10 or more.Type: GrantFiled: December 17, 2004Date of Patent: December 25, 2007Assignee: Lenovo Singapore Pte. LtdInventors: Hidetoshi Numata, Yoichi Taira, Kuniami Sueoka
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Publication number: 20070139582Abstract: A color filterless display device performing color display for expressing one pixel by three RGB sub-pixels includes: a light source; a diffraction grating for separating a light irradiated from this light source into lights of a plurality of wavelength regions; a cylindrical lens array for receiving the separated light and condensing the light while corresponding to each of the sub-pixels; and a liquid crystal cell including a structure portion for correcting an angle of the condensed light for all sub-pixels, wherein, in the structure portion of this liquid crystal cell, a side onto which a light from the cylindrical lens array is made incident is made of a high refractive index layer, an emitting side from which the light is emitted is made of a low refractive index layer, and a Fresnel-type microprism structure is formed by the high refractive index layer and the low refractive index layer.Type: ApplicationFiled: January 9, 2007Publication date: June 21, 2007Applicant: International Business Machine CorporationInventors: Hidetoshi Numata, Shinya Ono, Fumiaki Yamada, Yoichi Taira
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Patent number: 7164454Abstract: A color filterless display device performing color display for expressing one pixel by three RGB sub-pixels includes: a light source; a diffraction grating for separating a light irradiated from this light source into lights of a plurality of wavelength regions; a cylindrical lens array for receiving the separated light and condensing the light while corresponding to each of the sub-pixels; and a liquid crystal cell including a structure portion for correcting an angle of the condensed light for all sub-pixels, wherein, in the structure portion of this liquid crystal cell, a side onto which a light from the cylindrical lens array is made incident is made of a high refractive index layer, an emitting side from which the light is emitted is made of a low refractive index layer, and a Fresnel-type microprism structure is formed by the high refractive index layer and the low refractive index layer.Type: GrantFiled: August 5, 2004Date of Patent: January 16, 2007Assignee: International Business Machines IncorporatedInventors: Hidetoshi Numata, Shinya Ono, Fumiaki Yamada, Yoichi Taira
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Publication number: 20060007302Abstract: Optical device and color display unit to correct an angle of visibility, emphasize front brightness or diffusion degree, improve brightness and the performance of angle of visibility, and moreover improve the performance of chromaticity. An optical device is a film-like optical device for angle-correcting light toward a predetermined direction and of two materials whose refractive index difference is at least 0.1 or over, formed so that one material constitutes a plurality of light guide paths having total reflection at the boundary with the adjacent other material, in which the light guide paths are formed so that they are not arranged at equal intervals or they have different cross sections from each other and the ratio of the width or diameter of the light input portion of each of the light guide paths to the film thickness of an optical device is at least 1:10 or more.Type: ApplicationFiled: December 17, 2004Publication date: January 12, 2006Applicant: International Business Machines CorporationInventors: Hidetoshi Numata, Yoichi Taira, Kuniaki Sueoka
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Publication number: 20050041174Abstract: A color filterless display device performing color display for expressing one pixel by three RGB sub-pixels includes: a light source; a diffraction grating for separating a light irradiated from this light source into lights of a plurality of wavelength regions; a cylindrical lens array for receiving the separated light and condensing the light while corresponding to each of the sub-pixels; and a liquid crystal cell including a structure portion for correcting an angle of the condensed light for all sub-pixels, wherein, in the structure portion of this liquid crystal cell, a side onto which a light from the cylindrical lens array is made incident is made of a high refractive index layer, an emitting side from which the light is emitted is made of a low refractive index layer, and a Fresnel-type microprism structure is formed by the high refractive index layer and the low refractive index layer.Type: ApplicationFiled: August 5, 2004Publication date: February 24, 2005Applicant: International Business Machines CorporationInventors: Hidetoshi Numata, Shinya Ono, Fumiaki Yamada, Yoichi Taira