Patents by Inventor Yutaka Tada
Yutaka Tada 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: 11972071Abstract: According to one embodiment, a lateral-electric-field liquid crystal display device includes a light-emitting display layer including OLEDs and a driving circuit controlling light emission of the OLEDs, a moisture impermeable film provided to be laminated on the light-emitting display layer to prevent infiltration of moisture into the light-emitting display layer, an optical substrate provided separately from the moisture impermeable film and subjecting light from the light-emitting display region to optical processing, a first touch electrode group serving as one electrode group of touch electrodes and provided on a back surface of the optical substrate, and an extraction electrode group formed to be laminated on the moisture impermeable film, the extraction electrode group and the optical substrate have an overlapping part in plan view, and electrodes of the first touch electrode group being electrically connected to electrodes of the extraction electrode group in the overlapping part.Type: GrantFiled: May 9, 2023Date of Patent: April 30, 2024Assignee: Japan Display Inc.Inventors: Yoshiro Aoki, Takashi Nakamura, Masahiro Tada, Hirotaka Hayashi, Makoto Shibusawa, Yutaka Umeda, Miyuki Ishikawa
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Patent number: 11603441Abstract: A methacrylic resin having a cyclic structure in a main chain thereof, a shaped article, and an optical component or automotive part, in which the glass transition temperature is higher than 120° C. and 160° C. or lower, and the sign of the orientational birefringence when being oriented so as to have a degree of orientation of 0.03 is different from the sign of the orientational birefringence when being oriented so as to have a degree of orientation of 0.08.Type: GrantFiled: July 9, 2019Date of Patent: March 14, 2023Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Junichi Yoshida, Yutaka Tada, Takuto Nakata, Miyuki Kazunori
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Publication number: 20210214477Abstract: A methacrylic resin having a cyclic structure in a main chain thereof, a shaped article, and an optical component or automotive part, in which the glass transition temperature is higher than 120° C. and 160° C. or lower, and the sign of the orientational birefringence when being oriented so as to have a degree of orientation of 0.03 is different from the sign of the orientational birefringence when being oriented so as to have a degree of orientation of 0.08.Type: ApplicationFiled: July 9, 2019Publication date: July 15, 2021Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Junichi YOSHIDA, Yutaka TADA, Takuto NAKATA, Miyuki KAZUNORI
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Methacrylic resin and production method, molded article, and optical or automotive component of same
Patent number: 10800875Abstract: Provided are a methacrylic resin having high heat resistance, highly controlled birefringence, and excellent color tone and transparency, and a production method, a molded article, and an optical or automotive component of the methacrylic resin. The methacrylic resin includes N-substituted maleimide monomer-derived structural units (B) in a main chain thereof in a proportion of 5 mass % to 40 mass %. The N-substituted maleimide monomer-derived structural units (B) include a structural unit represented by formula (1). The methacrylic resin has a glass transition temperature of higher than 120° C. and not higher than 160° C. The content of components that exhibit light absorption at a wavelength of 400 nm in methanol-soluble content of the methacrylic resin is more than 0 mass % and not more than 2 mass % as calculated in terms of N-phenylmaleimide.Type: GrantFiled: March 27, 2018Date of Patent: October 13, 2020Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Junichi Yoshida, Yutaka Tada -
Patent number: 10597524Abstract: Provided are a methacrylic resin composition and a film containing a methacrylic resin that includes: 50 mass % to 97 mass % of a methacrylic acid ester monomer unit (A); 3 mass % to 30 mass % of a structural unit (B) having a cyclic structure-containing main chain; and 0 mass % to 20 mass % of another vinyl monomer unit (C) that is copolymerizable with a methacrylic acid ester monomer. The methacrylic resin satisfies the following conditions (1) and (2): (1) the methacrylic resin has a weight average molecular weight of 65,000 to 300,000 as measured by GPC; and (2) the total content of specific components is 0.01 mass % to 0.40 mass % as determined by GC/MS.Type: GrantFiled: November 14, 2016Date of Patent: March 24, 2020Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Fumiki Murakami, Yutaka Tada, Yumika Kurihara, Nobuhiro Kobayashi, Masami Yonemura
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METHACRYLIC RESIN AND PRODUCTION METHOD, MOLDED ARTICLE, AND OPTICAL OR AUTOMOTIVE COMPONENT OF SAME
Publication number: 20190300646Abstract: Provided are a methacrylic resin having high heat resistance, highly controlled birefringence, and excellent color tone and transparency, and a production method, a molded article, and an optical or automotive component of the methacrylic resin. The methacrylic resin includes N-substituted maleimide monomer-derived structural units (B) in a main chain thereof in a proportion of 5 mass % to 40 mass %. The N-substituted maleimide monomer-derived structural units (B) include a structural unit represented by formula (1). The methacrylic resin has a glass transition temperature of higher than 120° C. and not higher than 160° C. The content of components that exhibit light absorption at a wavelength of 400 nm in methanol-soluble content of the methacrylic resin is more than 0 mass % and not more than 2 mass % as calculated in terms of N-phenylmaleimide.Type: ApplicationFiled: March 27, 2018Publication date: October 3, 2019Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Junichi YOSHIDA, Yutaka TADA -
Publication number: 20180305538Abstract: Provided are a methacrylic resin composition and a film containing a methacrylic resin that includes: 50 mass % to 97 mass % of a methacrylic acid ester monomer unit (A); 3 mass % to 30 mass % of a structural unit (B) having a cyclic structure-containing main chain; and 0 mass % to 20 mass % of another vinyl monomer unit (C) that is copolymerizable with a methacrylic acid ester monomer. The methacrylic resin satisfies the following conditions (1) and (2): (1) the methacrylic resin has a weight average molecular weight of 65,000 to 300,000 as measured by GPC; and (2) the total content of specific components is 0.01 mass % to 0.40 mass % as determined by GC/MS.Type: ApplicationFiled: November 14, 2016Publication date: October 25, 2018Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Fumiki MURAKAMI, Yutaka TADA, Yumika KURIHARA, Nobuhiro KOBAYASHI, Masami YONEMURA
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Publication number: 20180291140Abstract: Provided is a methacrylic resin shaped product having high heat resistance, highly controlled birefringence, and excellent color tone and transparency. The methacrylic resin shaped product comprises a methacrylic resin or a composition containing the methacrylic resin. The methacrylic resin includes a structural unit (B) having a cyclic structure including at least one structural unit selected from the group consisting of an N-substituted maleimide structural unit (B-1) and a lactone ring structural unit (B-2) in a main chain, and has a glass transition temperature of higher than 120° C. and not higher than 160° C. Methanol-soluble content in the methacrylic resin is 5 mass % or less relative to 100 mass %, in total, of the methanol-soluble content and methanol-insoluble content. Yellowness index (YI) measured with respect to a 20 w/v % chloroform solution of the methanol-insoluble content using a 10 cm optical path length cell is 0 to 7.Type: ApplicationFiled: March 30, 2018Publication date: October 11, 2018Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Junichi YOSHIDA, Harumi WATANABE, Yutaka TADA
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Patent number: 5994980Abstract: An elastic surface acoustic wave filter device provides balanced operation with a neutral terminal kept at a ground potential and is adaptable for any system of unbalanced input-to-balanced output or balanced input-to-unbalanced output even with an input and an output having a different characteristic impedance. A first elastic surface acoustic wave filter having a first predetermined phase is connected in a cascade arrangement to a second elastic surface acoustic wave filter having a phase that is different by about 180 degrees from the first predetermined phase to form a first set of cascaded elastic surface acoustic wave filters. A third elastic surface acoustic wave filter having the first predetermined phase is connected in a cascade arrangement to a fourth elastic surface acoustic wave filter having the predetermined phase to form a second set of cascaded elastic surface acoustic wave filters.Type: GrantFiled: October 7, 1997Date of Patent: November 30, 1999Assignee: Murata Manufacturing Co., Ltd.Inventor: Yutaka Tada
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Patent number: 5966061Abstract: A surface acoustic wave filter has an input electrode and an output electrode of a finger type with mutually parallel elongated fingers formed generally at a constant pitch on a piezoelectric substrate and sandwiched between a pair of reflectors. Two of these fingers of the input electrode which are the closest and the second closest to the output electrode, or two of these fingers of the output electrode which are the closest and the second closest to the input electrode, are connected together to a same grounding terminal. A plurality of such filters may be connected together to form a multi-stage filter.Type: GrantFiled: November 7, 1996Date of Patent: October 12, 1999Assignee: Murata Manufacturing Co., Ltd.Inventor: Yutaka Tada
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Patent number: 5731748Abstract: A surface acoustic wave filter has pairs of interdigital transducers and reflectors formed on a 36.degree. Y-X LiTaO.sub.3 substrate, the reflectors sandwiching the interdigital transducers in between. The film thickness h of the electrode fingers of the interdigital transducers and the reflectors is such that 0.06.ltoreq.h/.lambda..ltoreq.0.01 where .lambda. is the wavelength of the surface acoustic wave adapted to be generated by the filter. The width-to-pitch ratio M/P of these electrode fingers for the interdigital transducers and the reflectors is such that M/P.gtoreq.0.6 in order to improve the shape factor of the filter.Type: GrantFiled: October 11, 1996Date of Patent: March 24, 1998Assignee: Murata Manufacturing Co., Ltd.Inventor: Yutaka Tada
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Patent number: 5568002Abstract: An IIDT type surface acoustic wave filter (41) comprising a piezoelectric substrate and at least three IDTs (44 to 46) which are arranged on a surface of the piezoelectric substrate along the direction of surface wave propagation, the IDT (44) being inverted in phase with respect to the other IDT (46) while these IDTs (44) and (46) are connected in series to each other through the ground potential, thereby balancing inputs or outputs.Type: GrantFiled: October 10, 1995Date of Patent: October 22, 1996Assignee: Murata Manufacturing Co., Ltd.Inventors: Takaharu Kawakatsu, Yutaka Tada, Hideharu Ieki
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Patent number: 4283935Abstract: A device for measuring thermal conductivity of a desired sample liquid, even of a transparent or hot sample liquid, on the basis of thermal diffusion to the sample liquid from a small and thin metal disc which is heated by laser flash. The device has means for elevating the relative surface level of the sample liquid, filling a gap between the metal disc and a sample holding block to form a cylindrical liquid layer therein, and the thermal diffusion can be measured by a thermocouple connected to the metal disc.Type: GrantFiled: December 13, 1979Date of Patent: August 18, 1981Assignee: President of Kyoto UniversityInventors: Wataru Eguchi, Makoto Harada, Masataka Tanigaki, Yutaka Tada
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Patent number: 4232543Abstract: An apparatus for measuring thermal conductivity of a desired sample liquid, even of a transparent sample liquid, on the basis of thermal diffusion to the sample liquid from a small and thin metal disc which is heated by laser flash. The sample liquid is inserted within a small gap which is formed between the metal disc and a sample holding block, and the thermal diffusion can be measured by a thermocouple connected to the metal disc.Type: GrantFiled: August 22, 1979Date of Patent: November 11, 1980Assignee: The President of Kyoto UniversityInventors: Wataru Eguchi, Makoto Harada, Masataka Tanigaki, Yutaka Tada
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Patent number: RE37102Abstract: A surface acoustic wave filter has pairs of interdigital transducers and reflectors formed on a 36° Y-X LiTaO3 substrate, the reflectors sandwiching the interdigital transducers in between. The film thickness h of the electrode fingers of the interdigital transducers and the reflectors is such that 0.06≦h/&lgr;≦0.01 0.10 where &lgr; is the wavelength of the surface acoustic wave adapted to be generated by the filter. The width-to-pitch ratio M/P of these electrode fingers for the interdigital transducers and the reflectors is such that M/P≧0.6 in order to improve the shape factor of the filter.Type: GrantFiled: January 27, 1999Date of Patent: March 20, 2001Assignee: Murata Manufacturing Co, LtdInventor: Yutaka Tada