Patents by Inventor Minoru Miyatake
Minoru Miyatake 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: 11959000Abstract: Provided are a photon up-conversion film, which is capable, of high-efficiency up-conversion even in air and even when low-intensity light is used, and a simple method of producing the film. The photon up-conversion film according to one embodiment of the present invention includes: a matrix including a resin; and a pore portion, wherein the photon up-conversion film includes at least a sensitizing component capable of absorbing light in a first wavelength region ?1, and a light-emitting component capable of radiating light in a second wavelength region ?2 including wavelengths shorter than those of the first wavelength region ?1, and wherein the sensitizing component and the light-emitting component are present at an interface between the matrix and the pore portion.Type: GrantFiled: June 15, 2022Date of Patent: April 16, 2024Assignees: WAKAYAMA PREFECTURE, NITTO DENKO CORPORATIONInventors: Takeshi Mori, Tomohiro Mori, Akane Saito, Tsuyoshi Masuda, Hitoshi Saomoto, Mami Kawaguchi, Minoru Miyatake, Shoichi Matsuda, Masato Katsuda
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Publication number: 20240059960Abstract: Provided are a photon up-conversion film, which is capable of high-efficiency up-conversion even in air and even when low-intensity light is used, and a simple method of producing the film. The photon up-conversion film according to one embodiment of the present invention includes: a matrix including a resin; and a pore portion, wherein the photon up-conversion film includes at least a sensitizing component capable of absorbing light in a first wavelength region ?1, and a light-emitting component capable of radiating light in a second wavelength region ?2 including wavelengths shorter than those of the first wavelength region ?1, and wherein the sensitizing component and the light-emitting component are present at an interface between the matrix and the pore portion.Type: ApplicationFiled: June 15, 2022Publication date: February 22, 2024Applicants: WAKAYAMA PREFECTURE, NITTO DENKO CORPORATIONInventors: Takeshi Mori, Tomohiro Mori, Akane Saito, Tsuyoshi Masuda, Hitoshi Saomoto, Mami Kawaguchi, Minoru Miyatake, Shoichi Matsuda, Masato Katsuda
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Publication number: 20230296823Abstract: An optical incoupling tape (50) attachable on a lightguide (20) is provided, comprising a substrate (50A) and at least one pattern (51) formed with a number of periodic pattern features (52) embedded in the substrate (50A) and configured as optically functional cavities (52) filled with a material having a refractive index different from the refractive index of the material of the substrate (50A) surrounding the cavity (52). The pattern (51) is configured to incouple light incident thereto and to adjust direction of the incoupled light such, that the incoupled light acquires a propagation path through a lightguide medium (20) via a series of total internal reflections. A method for manufacturing the tape (50), related uses and an optical apparatus comprising the tape (50) integrated with a light emitter device (22) are further provided.Type: ApplicationFiled: August 4, 2021Publication date: September 21, 2023Applicant: NITTO DENKO CORPORATIONInventors: Kozo NAKAMURA, Minoru MIYATAKE, Yufeng WENG, Kari RINKO, Shingo MATSUMOTO
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Publication number: 20230288624Abstract: An optical deflection tape (10) attachable on a lightguide (20) is provided, comprising a substrate (10A) and at least one pattern (11) formed with a number of periodic pattern features (12) embedded in the substrate (10A) and configured as optically functional cavities (12) filled with a material having a refractive index different from the refractive index of the material of the substrate (10A) surrounding the cavity (12). The pattern (11) is configured to adjust direction of light received thereto such, that light incident at the pattern (11) is deflected to acquire a propagation path through a lightguide medium (20) via a series of total internal reflections and, by virtue of said at least one pattern (11), the optical deflection tape (10) is configured to control distribution of light propagating through the lightguide (20). A method for manufacturing the tape (10) and related uses are further provided.Type: ApplicationFiled: August 4, 2021Publication date: September 14, 2023Applicant: NITTO DENKO CORPORATIONInventors: Kozo NAKAMURA, Minoru MIYATAKE, Yufeng WENG, Kari RINKO, Shingo MATSUMOTO
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Publication number: 20230273363Abstract: An optical incoupling element (100) provided in the form of a discrete item attachable on a lightguide (20) is provided, comprising a substrate (100A) and at least one three-dimensionally formed optical surface (104). The optical surface (104) is configured to incouple light incident thereto and to adjust direction of the incoupled light transmitted through an optical contact surface (107) established at an interface between the element substrate (100A) and a lightguide medium (20) such, that the incoupled light acquires a propagation path through a lightguide medium (20) via a series of total internal reflections. The optical surface (104) may comprise at least on optical cavity pattern (101). The element (100) is configured to receive light onto said at least one three-dimensionally formed optical surface (104) from a direction essentially parallel to a longitudinal plane of the planar lightguide (20).Type: ApplicationFiled: August 4, 2021Publication date: August 31, 2023Applicant: NITTO DENKO CORPORATIONInventors: Kozo NAKAMURA, Minoru MIYATAKE, Yufeng WENG, Kari RINKO, Shingo MATSUMOTO
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Publication number: 20210107252Abstract: Disclosed is an optical laminate roll formed of a long optical laminate including a glass layer. In the optical laminate roll, the optical laminate includes a flexible glass layer (10), a polarize (30) and a pressure sensitive adhesive layer (80). The thickness of the glass layer is preferably 150 ?m or less. The length of the optical laminate roll is preferably 100 m or more. In the optical laminate, the polarizer and the adhesive layer may be arranged in this order on a first principal surface of the glass layer. A transparent film may be disposed between the glass layer and the polarizer.Type: ApplicationFiled: January 23, 2019Publication date: April 15, 2021Applicant: NITTO DENKO CORPORATIONInventors: Shoichi Kawamitsu, Takeshi Murashige, Junichi Inagaki, Minoru Miyatake, Kazutaka Hara, Makoto Miyamoto
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Publication number: 20210109274Abstract: There is provided an optical device which realizes sufficient contrast or visibility, with a simple configuration. The optical device includes: a light guiding layer; a first optically functional layer provided on a first principal face of the light guiding layer; a second optically functional layer provided on a second principal face of the light guiding layer that is on an opposite side to the first principal face; and an optical medium layer provided on a surface of the second optically functional layer that is on an opposite side to the light guiding layer. A refractive index of the first optically functional layer is lower than a refractive index of the light guiding layer.Type: ApplicationFiled: March 22, 2019Publication date: April 15, 2021Applicant: NITTO DENKO CORPORATIONInventors: Kari RINKO, Minoru MIYATAKE, Kozo NAKAMURA
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Patent number: 10895676Abstract: An optical stack includes a liquid crystal panel with a color filter array. The liquid crystal panel has a filter side closest to the color filter array and a non-filter side opposite the filter side. An absorbing polarizer is laminated directly to the filter side of the liquid crystal panel, and a reflective polarizer laminated directly to the absorbing polarizer.Type: GrantFiled: December 29, 2015Date of Patent: January 19, 2021Assignees: 3M Innovative Properties Company, Nitto Denko CorporationInventors: Matthew B. Johnson, Chikara Abe, Hiroaki Sawada, Minoru Miyatake
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Patent number: 10421264Abstract: A method of producing a roll of an optical film laminate strip includes the steps of: forming an optical film laminate which includes an optical film having a continuous web of polarizing film, and a resin film bonded to the optical film; creating a reference mark to extend across the optical film laminate in a width direction thereof; performing a defect inspection for detecting a defect existing in the optical film, and, when a defect is detected, recording a position of the defect in the form of a laminate widthwise position and a laminate lengthwise position as measured from the reference mark; cutting the optical film laminate along a direction parallel to the length direction to form a plurality of continuous webs of laminate strips; based on the widthwise position of the defect detected by the defect inspection, determining which of the cut laminate strips has the defect, and, with respect to a specific laminate strip which is determined to have the defect, storing information about the defect togetherType: GrantFiled: September 1, 2011Date of Patent: September 24, 2019Assignee: NITTO DENKO CORPORATIONInventors: Takeharu Kitagawa, Takuya Nakazono, Shusaku Goto, Minoru Miyatake, Tomohiro Mori, Takashi Kamijo
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Patent number: 10266629Abstract: An aqueous dispersion-type pressure-sensitive adhesive composition for an optical film includes a emulsion particles of a core-shell structure, wherein the emulsion particles include a (meth)acryl-based copolymer (A) having a glass transition temperature of ?55° C. to 0° C. and a (meth)acryl-based copolymer (B) having a glass transition temperature of 0° C. to 180° C., in a single emulsion particle, one of the copolymers (A) and (B) forms a core layer, and another forms a shell layer, at least one of the copolymers (A) and (B) contains a carboxyl group-containing monomer, a difference of the glass transition temperatures between the copolymers (A) and (B) is 50° C. or more, and a ratio (A)/(B) (by weight) is in the range of 50/50 to 90/10.Type: GrantFiled: May 16, 2011Date of Patent: April 23, 2019Assignee: NITTO DENKO CORPORATIONInventors: Kunihiro Inui, Toshitsugu Hosokawa, Takaaki Ishii, Masayuki Satake, Kenichi Okada, Toshitaka Takahashi, Yousuke Makihata, Taiki Shimokuri, Shusaku Goto, Takeharu Kitagawa, Minoru Miyatake, Tomohiro Mori, Takashi Kamijo
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Patent number: 10228496Abstract: A pressure-sensitive adhesive layer-attached polarizing film of the invention includes: a polarizing film; and a pressure-sensitive adhesive layer provided on the polarizing film, wherein the polarizing film includes a polarizer and a transparent protective film provided on only one side of the polarizer, the pressure-sensitive adhesive layer is provided on a side of the polarizer where the transparent protective film is absent, and the pressure-sensitive adhesive layer is made of a pressure-sensitive adhesive composition containing a (meth)acryl-based polymer (A) and an alkali metal salt (B). The pressure-sensitive adhesive layer-attached polarizing film has a pressure-sensitive adhesive layer with an antistatic function and satisfactory durability and whose optical properties are less likely to be degraded.Type: GrantFiled: February 20, 2018Date of Patent: March 12, 2019Assignee: NITTO DENKO CORPORATIONInventors: Atsushi Yasui, Yuusuke Toyama, Tomoyuki Kimura, Masayuki Satake, Shusaku Goto, Takeharu Kitagawa, Minoru Miyatake, Tomohiro Mori, Takashi Kamijo
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Patent number: 10160173Abstract: A method of producing a thin polarizing film having an excellent polarization degree includes, forming a polyvinyl alcohol-based resin layer on a thermoplastic resin substrate to prepare a laminate, subjecting the laminate to underwater stretching in an aqueous solution of boric acid and stretching the laminate while drying the laminate after the underwater stretching.Type: GrantFiled: September 8, 2011Date of Patent: December 25, 2018Assignee: NITTO DENKO CORPORATIONInventors: Tomohiro Mori, Minoru Miyatake, Takashi Kamijo, Shusaku Goto, Takeharu Kitagawa
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Patent number: 10101514Abstract: Provided is a laminate comprising a thermoplastic resin substrate and a polyvinyl alcohol based resin layer formed on the thermoplastic resin substrate, being used to form a polarizing film of the polyvinyl alcohol based resin layer treated with a post-process comprising at least a dyeing step of dyeing the polyvinyl alcohol based resin layer with a dichroic material, the post-process being performed after the polyvinyl alcohol based resin layer formed on the thermoplastic resin substrate is stretched together with the thermoplastic resin substrate, wherein the polyvinyl alcohol based resin layer comprises a polyvinyl alcohol based resin and a halide.Type: GrantFiled: September 12, 2016Date of Patent: October 16, 2018Assignee: NITTO DENKO CORPORATIONInventors: Shusaku Goto, Minoru Miyatake, Takashi Kamijo, Satoru Kunikata
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Patent number: 10061066Abstract: The present invention pertains to a one-side-protected polarizing film having a transparent protective film on only one surface of a polarizer, wherein: the polarizer contains a polyvinyl alcohol-based resin, has a thickness of 10 ?m or less, and is designed to have a single-body transmittance T and a polarization degree P representing optical properties satisfying the condition of the following formula: P>?(100.929T?42.4?1)×100 (provided that T<42.3) or P?99.9 (provided that T?42.3); and the other surface of the polarizer has a transparent resin layer having a thickness of 0.2 ?m or more and formed from a layer-forming material including a polyvinyl alcohol-based resin. Even when the polarizer has prescribed optical properties and the thickness is 10 ?m or less, this one-side-protected polarizing film is capable of suppressing the occurrence of through cracks and nano-slits.Type: GrantFiled: September 29, 2015Date of Patent: August 28, 2018Assignee: NITTO DENKO CORPORATIONInventors: Tomonori Ueno, Satoshi Mita, Yusuke Motegi, Jingfan Xu, Atsushi Kishi, Minoru Miyatake
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Patent number: 10025013Abstract: An optical display device which includes a display panel, and at least one polarizing film including a polyvinyl alcohol-based resin layer disposed on a viewing side with respect to the display panel, and having an optical arrangement forming a cross-Nicol relationship with regard to polarized light entering the polarizing film from the side of the display panel. The polarizing film is produced to have a thickness of 10 ?m or less, by a method comprising the steps of: forming a polyvinyl alcohol-based resin layer on a resin substrate; stretching the polyvinyl alcohol-based resin layer integrally with the resin substrate; and dyeing the polyvinyl alcohol-based resin layer using a dichroic material. The polarizing film is disposed in the optical display device in a state in which a surface of the polarizing film as a contact surface with the resin substrate during the production thereof is oriented toward a side opposite to the display panel.Type: GrantFiled: March 8, 2013Date of Patent: July 17, 2018Assignee: NITTO DENKO CORPORATIONInventors: Kentaro Ikeshima, Minoru Miyatake, Yuki Nakano
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Publication number: 20180188421Abstract: A pressure-sensitive adhesive layer-attached polarizing film of the invention includes: a polarizing film; and a pressure-sensitive adhesive layer provided on the polarizing film, wherein the polarizing film includes a polarizer and a transparent protective film provided on only one side of the polarizer, the pressure-sensitive adhesive layer is provided on a side of the polarizer where the transparent protective film is absent, and the pressure-sensitive adhesive layer is made of a pressure-sensitive adhesive composition containing a (meth)acryl-based polymer (A) and an alkali metal salt (B). The pressure-sensitive adhesive layer-attached polarizing film has a pressure-sensitive adhesive layer with an antistatic function and satisfactory durability and whose optical properties are less likely to be degraded.Type: ApplicationFiled: February 20, 2018Publication date: July 5, 2018Applicant: NITTO DENKO CORPORATIONInventors: Atsushi Yasui, Yuusuke Toyama, Tomoyuki Kimura, Masayuki Satake, Shusaku Goto, Takeharu Kitagawa, Minoru Miyatake, Tomohiro Mori, Takashi Kamijo
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Publication number: 20180052268Abstract: A method of producing a polarizing plate according to an embodiment includes: applying an application liquid containing a polyvinyl alcohol-based resin and a surfactant onto a resin substrate to produce a laminate in which a polyvinyl alcohol-based resin layer is formed on the resin substrate; stretching and dyeing the polyvinyl alcohol-based resin layer formed on the resin substrate to produce a polarizing film; laminating an optical functional film on a polarizing film side of the laminate to produce an optical functional film laminate; and peeling the resin substrate from the optical functional film laminate. A content of the surfactant in the application liquid is less than 1 part by weight with respect to 100 parts by weight of the polyvinyl alcohol-based resin.Type: ApplicationFiled: October 31, 2017Publication date: February 22, 2018Applicant: NITTO DENKO CORPORATIONInventors: Satoru Kunikata, Shusaku Goto, Minoru Miyatake, Kentarou Yoshida
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Publication number: 20170371083Abstract: Optical stacks are disclosed. In particular, optical stacks having a reflective polarizer and an optical compensation film are disclosed.Type: ApplicationFiled: December 29, 2015Publication date: December 28, 2017Inventors: Matthew B. Johnson, Chikara Abe, Hiroaki Sawada, Minoru Miyatake
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Patent number: 9823397Abstract: A method of producing a polarizing plate according to an embodiment includes: applying an application liquid containing a polyvinyl alcohol-based resin and a surfactant onto a resin substrate to produce a laminate in which a polyvinyl alcohol-based resin layer is formed on the resin substrate; stretching and dyeing the polyvinyl alcohol-based resin layer formed on the resin substrate to produce a polarizing film; laminating an optical functional film on a polarizing film side of the laminate to produce an optical functional film laminate; and peeling the resin substrate from the optical functional film laminate. A content of the surfactant in the application liquid is less than 1 part by weight with respect to 100 parts by weight of the polyvinyl alcohol-based resin.Type: GrantFiled: December 9, 2014Date of Patent: November 21, 2017Assignee: NITTO DENKO CORPORATIONInventors: Satoru Kunikata, Shusaku Goto, Minoru Miyatake, Kentarou Yoshida
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Publication number: 20170299790Abstract: The present invention pertains to a one-side-protected polarizing film having a transparent protective film on only one surface of a polarizer, wherein: the polarizer contains a polyvinyl alcohol-based resin, has a thickness of 10 ?m or less, and is designed to have a single-body transmittance T and a polarization degree P representing optical properties satisfying the condition of the following formula: P>?(100.929T?42.4?1)×100 (provided that T<42.3) or P?99.9 (provided that T?42.3); and the other surface of the polarizer has a transparent resin layer having a thickness of 0.2 ?m or more and formed from a layer-forming material including a polyvinyl alcohol-based resin. Even when the polarizer has prescribed optical properties and the thickness is 10 ?m or less, this one-side-protected polarizing film is capable of suppressing the occurrence of through cracks and nano-slits.Type: ApplicationFiled: September 29, 2015Publication date: October 19, 2017Applicant: NITTO DENKO CORPORATIONInventors: Tomonori Ueno, Satoshi Mita, Yusuke Motegi, Jingfan Xu, Atsushi Kishi, Minoru Miyatake