Patents by Inventor Mitsuo Arima
Mitsuo Arima 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: 9618657Abstract: An optical element has a base material having a surface and a plurality of structures which are arranged on the surface of the base material at a fine pitch equal to or shorter than the wavelength of visible light and which each includes a convex or concave portion. The elastic modulus of the material forming the structures is 1 MPa or more and 1200 MPa or less, and the surface on which the structures are formed are hydrophilic.Type: GrantFiled: March 30, 2012Date of Patent: April 11, 2017Assignee: DEXERIALS CORPORATIONInventors: Tomoo Fukuda, Sung-kil Lee, Mitsuo Arima, Fumihiko Iida, Hiroyuki Kiso, Yu Nomura
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Publication number: 20160313474Abstract: A method for designing anti-reflective structure in which plurality of nanostructures formed of projected portions on substrate surface are provided at intervals equal to or less than visible light wavelength, in order to reduce chroma (?(a*2+b*2)) of reflected light with respect to white light to as close to zero as possible, average height of nanostructures from flat portion of substrate surface is 180 nm or greater and 290 nm or less; and filling rate of nanostructures, i.e., ratio of area of bottom surface of nanostructures to area of substrate surface in plan view of anti-reflective structure is defined, in terms of relationship between filling rate and chroma (?(a*2+b*2)) of reflected light from anti-reflective structure with respect to white light, so as to fall within range of ±5% of filling rate at which chroma takes on minimum value.Type: ApplicationFiled: January 5, 2015Publication date: October 27, 2016Applicant: DEXERIALS CORPORATIONInventors: Yutaka WADA, Mitsuo ARIMA
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Patent number: 8998429Abstract: A printed material includes a printed material body with a surface, and an optical element disposed on the surface of the printed material body. The optical element includes multiple structures formed at a pitch not longer than the wavelength of visible light. The structures have an aspect ratio of 0.6 or more and 5.0 or less.Type: GrantFiled: March 30, 2012Date of Patent: April 7, 2015Assignee: Sony CorporationInventors: Tomoo Fukuda, Mitsuo Arima, Sung-kil Lee, Yu Nomura, Hiroyuki Kiso, Fumihiko Iida
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Publication number: 20140098422Abstract: An optical element has a base material having a surface and a plurality of structures which are arranged on the surface of the base material at a fine pitch equal to or shorter than the wavelength of visible light and which each includes a convex or concave portion. The elastic modulus of the material forming the structures is 1 MPa or more and 1200 MPa or less, and the surface on which the structures are formed are hydrophilic.Type: ApplicationFiled: March 30, 2012Publication date: April 10, 2014Applicant: DEXERIALS CORPORATIONInventors: Tomoo Fukuda, Sung-kil Lee, Mitsuo Arima, Fumihiko Iida, Hiroyuki Kiso, Yu Nomura
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Publication number: 20140063607Abstract: A printed material includes a printed material body with a surface, and an optical element disposed on the surface of the printed material body. The optical element includes multiple structures formed at a pitch not longer than the wavelength of visible light. The structures have an aspect ratio of 0.6 or more and 5.0 or less.Type: ApplicationFiled: March 30, 2012Publication date: March 6, 2014Applicant: SONY CORPORATIONInventors: Tomoo Fukuda, Mitsuo Arima, Sung-Ki Lee, Yu Nomura, Hiroyuki Kiso, Fumihiko Iida
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Patent number: 8237886Abstract: A method of manufacturing the optical sheet is provided. The method includes: a first step of heating a composition containing a liquid crystal monomer or liquid crystal prepolymer and a photopolymerization initiator at a temperature equal to or higher than a melting point of the liquid crystal monomer or liquid crystal prepolymer and pressing the composition in a state where the composition is held between a master including a plurality of solid structures disposed continuously in one surface and having shape anisotropy in the one surface and a light transmission film disposed so as to face the solid structures of the master. The method also includes a second step of irradiating the composition with ultraviolet rays at a temperature lower than a phase transmission temperature to an isotropic phase to polymerize the liquid crystal monomer or liquid crystal prepolymer and, after that, separating the light transmission film from the master.Type: GrantFiled: October 30, 2008Date of Patent: August 7, 2012Assignee: Sony CorporationInventors: Kei Obata, Jun Shimizu, Kentaro Okuyama, Mitsuo Arima, Mitsunari Hoshi
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Patent number: 7719631Abstract: An optical sheet has a large number of cylindrical lens elements provided successively on one of principal faces thereof. The cylindrical lens elements have a hyperboloidal face or a paraboloidal face and have a finite focal distance on the emission side of illumination light. Where a Z axis is taken in parallel to a normal line direction to the optical sheet and an X axis is taken in a direction of the row of the cylindrical lens elements, a cross sectional shape of the cylindrical lens elements satisfies Z=X2/(R+?{square root over ( )}(R2?(1+K)X2)) (where R is the radius of curvature of a distal end vertex, and K is a conic constant).Type: GrantFiled: December 30, 2008Date of Patent: May 18, 2010Assignee: Sony CorporationInventors: Mitsuo Arima, Jun Shimizu, Hirokazu Odagiri, Eiji Ohta, Kei Obata
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Patent number: 7695167Abstract: An optical sheet has a large number of cylindrical lens elements provided successively on one of principal faces thereof. The cylindrical lens elements have a finite focal distance on the emission side of illumination light and have an aspheric face of a leftwardly and rightwardly symmetric sectional shape. Where a Z axis is taken in parallel to a normal line direction to the optical sheet and an X axis is taken in a direction of the row of the cylindrical lens elements, a cross sectional shape of the cylindrical lens elements satisfies Z=X2/(R+?{square root over ( )}(R2?(1+K)X2))+AX4+BX5+CX6+ . . . (where R is the radius of curvature of a distal end vertex, K is a conic constant, and A, B, C, . . . are aspheric coefficients).Type: GrantFiled: September 30, 2005Date of Patent: April 13, 2010Assignee: Sony CorporationInventors: Mitsuo Arima, Jun Shimizu, Hirokazu Odagiri, Eiji Ohta, Kei Obata
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Publication number: 20090153775Abstract: An optical sheet has a large number of cylindrical lens elements provided successively on one of principal faces thereof. The cylindrical lens elements have a hyperboloidal face or a paraboloidal face and have a finite focal distance on the emission side of illumination light. Where a Z axis is taken in parallel to a normal line direction to the optical sheet and an X axis is taken in a direction of the row of the cylindrical lens elements, a cross sectional shape of the cylindrical lens elements satisfies Z=X2/(R+?{square root over ( )}(R2?(1+K)X2)) (where R is the radius of curvature of a distal end vertex, and K is a conic constant).Type: ApplicationFiled: December 30, 2008Publication date: June 18, 2009Applicant: Sony CorporationInventors: Mitsuo Arima, Jun Shimizu, Hirokazu Odagiri, Eiji Ohta, Kei Obata
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Patent number: 7545460Abstract: A liquid crystal display, optical sheet manufacturing method, and an optical sheet are provided. The occurrence of moiré is prevented while suppressing a reduction in front luminance. The liquid crystal display includes: a liquid crystal display panel; a light source arranged on a back surface side of the liquid crystal display panel; an optical sheet with a light-condensing property arranged between the liquid crystal display panel and the light source, the optical sheet having a number of irregularities arranged continuously on a principal surface of the optical sheet; and a diffuser sheet arranged between the liquid crystal display panel and the optical sheet.Type: GrantFiled: April 5, 2006Date of Patent: June 9, 2009Assignee: Sony CorporationInventors: Mitsuo Arima, Jun Shimizu, Kei Obata, Eiji Oota, Toru Abiko, Yasuyuki Kudo, Masato Ishigaki, Mitsunari Hoshi
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Publication number: 20090109375Abstract: A method of manufacturing the optical sheet is provided. The method includes: a first step of heating a composition containing a liquid crystal monomer or liquid crystal prepolymer and a photopolymerization initiator at a temperature equal to or higher than a melting point of the liquid crystal monomer or liquid crystal prepolymer and pressing the composition in a state where the composition is held between a master including a plurality of solid structures disposed continuously in one surface and having shape anisotropy in the one surface and a light transmission film disposed so as to face the solid structures of the master. The method also includes a second step of irradiating the composition with ultraviolet rays at a temperature lower than a phase transmission temperature to an isotropic phase to polymerize the liquid crystal monomer or liquid crystal prepolymer and, after that, separating the light transmission film from the master.Type: ApplicationFiled: October 30, 2008Publication date: April 30, 2009Applicant: SONY CORPORATIONInventors: Kei Obata, Jun Shimizu, Kentaro Okuyama, Mitsuo Arima, Mitsunari Hoshi
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Patent number: 7502308Abstract: An optical recording medium has spirally or concentrically formed tracks and capable of an optical recording. The optical recording medium includes a data recording and reproducing area divided into a plurality of zones in the radial direction. One zone is divided into a plurality of sectors respectively having an address area including pits having address information and a data are in which data is only present in grooves. The number of sectors forming each zone is different. An optical disc is formed so that an average reflectance Iadd of the address part and an average reflectance Idata of the data part satisfy a relation expressed by 0.7?(Iadd/Idata)?1.3 or 0.8?(Iadd/Idata)?1.2.Type: GrantFiled: December 19, 2003Date of Patent: March 10, 2009Assignee: Sony CorporationInventors: Hiroshi Nakayama, Atsushi Takeuchi, Mitsuo Arima
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Patent number: 7483094Abstract: An optical sheet has a large number of cylindrical lens elements provided successively on one of principal faces thereof. The cylindrical lens elements have a hyperboloidal face or a paraboloidal face and have a finite focal distance on the emission side of illumination light. Where a Z axis is taken in parallel to a normal line direction to the optical sheet and an X axis is taken in a direction of the row of the cylindrical lens elements, a cross sectional shape of the cylindrical lens elements satisfies Z=X2/(R+?{square root over ( )}(R2?(1+K)X2)) (where R is the radius of curvature of a distal end vertex, and K is a conic constant).Type: GrantFiled: September 30, 2005Date of Patent: January 27, 2009Assignee: Sony CorporationInventors: Mitsuo Arima, Jun Shimizu, Hirokazu Odagiri, Eiji Ohta, Kei Obata
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Publication number: 20080316392Abstract: A liquid crystal display, optical sheet manufacturing method, and an optical sheet are provided. The occurrence of moiré is prevented while suppressing a reduction in front luminance. The liquid crystal display includes: a liquid crystal display panel; a light source arranged on a back surface side of the liquid crystal display panel; an optical sheet with a light-condensing property arranged between the liquid crystal display panel and the light source, the optical sheet having a number of irregularities arranged continuously on a principal surface of the optical sheet; and a diffuser sheet arranged between the liquid crystal display panel and the optical sheet.Type: ApplicationFiled: April 5, 2006Publication date: December 25, 2008Applicant: SONY CORPORATIONInventors: Mitsuo Arima, Jun Shimizu, Kei Obata, Eiji Oota, Toru Abiko, Yasuyuki Kudo, Masato Ishigaki, Mitsunari Hoshi
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Patent number: 7294281Abstract: An optical information recording medium, which includes both of a land surface and a groove surface as a recording track and presents high signal quality. The optical information recording medium includes both a land and a groove as the recording track on a substrate, in which a laser light is irradiated from a reverse side of the substrate to thereby carry out a recording and a reproduction, and an inclination angle of a groove side is 25° or more and 40° or less, and both of arithmetic average roughness (Ra) on the land surface and the groove surface are assumed to be 0.2 to 0.7 nm.Type: GrantFiled: August 30, 2004Date of Patent: November 13, 2007Assignee: Sony CorporationInventors: Hiroyuki Takemoto, Mitsuo Arima, Tadao Suzuki, Yoshihito Fukushima, Hiroshi Nakayama, Atsushi Takeuchi
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Publication number: 20070242478Abstract: An optical sheet has a large number of cylindrical lens elements provided successively on one of principal faces thereof. The cylindrical lens elements have a finite focal distance on the emission side of illumination light and have an aspheric face of a leftwardly and rightwardly symmetric sectional shape. Where a Z axis is taken in parallel to a normal line direction to the optical sheet and an X axis is taken in a direction of the row of the cylindrical lens elements, a cross sectional shape of the cylindrical lens elements satisfies Z=X2/(R+?{square root over ( )}(R2?(1+K)X2))+AX4+BX5+CX6+ . . . (where R is the radius of curvature of a distal end vertex, K is a conic constant, and A, B, C, . . . are aspheric coefficients).Type: ApplicationFiled: September 30, 2005Publication date: October 18, 2007Applicant: Sony CorporationInventors: Mitsuo Arima, Jun Shimizu, Hirokazu Odagiri, Eiji Ohta, Kei Obata
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Publication number: 20070242361Abstract: An optical sheet has a large number of cylindrical lens elements provided successively on one of principal faces thereof. The cylindrical lens elements have a hyperboloidal face or a paraboloidal face and have a finite focal distance on the emission side of illumination light. Where a Z axis is taken in parallel to a normal line direction to the optical sheet and an X axis is taken in a direction of the row of the cylindrical lens elements, a cross sectional shape of the cylindrical lens elements satisfies Z=X2/(R+?{square root over ( )}(R2?(1+K)X2)) (where R is the radius of curvature of a distal end vertex, and K is a conic constant).Type: ApplicationFiled: September 30, 2005Publication date: October 18, 2007Applicant: Sony CorporationInventors: Mitsuo Arima, Jun Shimizu, Hirokazu Odagiri, Eiji Ohta, Kei Obata
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Patent number: 6986152Abstract: An optical information recording medium, which includes both of a land surface and a groove surface as a recording track and presents high signal quality. The optical information recording medium includes both a land and a groove as the recording track on a substrate, in which a laser light is irradiated from a reverse side of the substrate to thereby carry out a recording and a reproduction, and an inclination angle of a groove side is 25° or more and 40° or less, and both of arithmetic average roughness (Ra) on the land surface and the groove surface are assumed to be 0.2 to 0.7 nm.Type: GrantFiled: June 26, 2002Date of Patent: January 10, 2006Assignee: Sony CorporationInventors: Hiroyuki Takemoto, Mitsuo Arima, Tadao Suzuki, Yoshihito Fukushima, Hiroshi Nakayama, Atsushi Takeuchi
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Publication number: 20050030838Abstract: A magneto-optical recording medium for MSR reproduction of a high signal quality wherein both faces of a land and a groove are used as recording tracks is disclosed. A magneto-optical recording medium wherein both of a land portion and a groove portion on a substrate are used as recording and reproduction tracks while laser light having passed through an objective lens is illuminated on the recording and reproduction tracks is configured that a ratio Wg/Wl between a track width (Wg) of the groove portion and a track width (Wl) of the land portion is equal to or higher than 0.65 but equal to or lower than 0.85, and, where the wavelength of the laser light is represented by ?, the numerical aperture of the objective lens by NA and the refractive index of the substrate by n, the groove distance Gp is equal to or greater than 1.0×?/NA but equal to or smaller than 1.2×?/NA and besides the depth D of the groove is equal to or greater than ?/11 n but equal to or smaller than ?/8 n.Type: ApplicationFiled: October 1, 2002Publication date: February 10, 2005Inventors: Yutaka Wada, Hiroshi Nakayama, Atsushi Takeuchi, Mitsuo Arima
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Publication number: 20050028184Abstract: An optical information recording medium, which includes both of a land surface and a groove surface as a recording track and presents high signal quality. The optical information recording medium includes both a land and a groove as the recording track on a substrate, in which a laser light is irradiated from a reverse side of the substrate to thereby carry out a recording and a reproduction, and an inclination angle of a groove side is 25° or more and 40° or less, and both of arithmetic average roughness (Ra) on the land surface and the groove surface are assumed to be 0.2 to 0.7 nm.Type: ApplicationFiled: August 30, 2004Publication date: February 3, 2005Applicant: Sony CorporationInventors: Hiroyuki Takemoto, Mitsuo Arima, Tadao Suzuki, Yoshihito Fukushima, Hiroshi Nakayama, Atsushi Takeuchi