Patents by Inventor Toshiyuki Hirai
Toshiyuki Hirai 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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RARE EARTH ALUMINATE SINTERED COMPACT AND METHOD FOR PRODUCING RARE EARTH ALUMINATE SINTERED COMPACT
Publication number: 20240132408Abstract: A rare earth aluminate sintered compact including rare earth aluminate phosphor crystalline phases and voids, wherein an absolute maximum length of 90% or more by number of rare earth aluminate phosphor crystalline phases is in a range from 0.4 ?m to 1.3 ?m, and an absolute maximum length of 90% or more by number of voids is in a range from 0.1 ?m to 1.2 ?m.Type: ApplicationFiled: December 29, 2023Publication date: April 25, 2024Applicant: NICHIA CORPORATIONInventors: Shozo TAKETOMI, Ryo YAMAMOTO, Tomomi FUJII, Toshiyuki HIRAI -
Publication number: 20240113793Abstract: A purely-lateral position estimation unit (1603) estimates as an estimated purely-lateral position, when a disturbance wave to disturb communication performed in a train is generated while the train is traveling, a position existing in a purely-lateral direction with respect to a position of a generation source of the disturbance wave. A feature extraction unit (1604) extracts a feature of a measured reception power value being a reception power value measured in the train during a disturbance wave generation period wherein the disturbance wave has been generated.Type: ApplicationFiled: December 11, 2023Publication date: April 4, 2024Applicant: Mitsubishi Electric CorporationInventors: Takuya MIURA, Hiroaki HIRAI, Toshiyuki KURIYAMA, Kosuke SHIMMYO, Katsuhiro KONDO
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Publication number: 20240114618Abstract: A circuit board unit includes a first circuit board having a first ground layer, a second circuit board having a second ground layer and arranged so as to be opposed to the first circuit board, a connector unit having a first connector attached to the first circuit board, and a second connector attached to the second circuit board and coupled to the first connector, and a metal member arranged between the first circuit board and the second circuit board, and configured to electrically couple the first ground layer and the second ground layer to each other. The metal member is arranged so as to be adjacent to the connector unit.Type: ApplicationFiled: September 28, 2023Publication date: April 4, 2024Applicant: SEIKO EPSON CORPORATIONInventors: Yu MASAGO, Toshiyuki OMORI, Masaaki ITO, Takeshi HIRAI
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Publication number: 20240083820Abstract: A method for producing a ceramic complex includes: preparing a raw material mixture that contains 5% by mass or more and 40% by mass or less of first rare earth aluminate fluorescent material particles containing an activating element and a first rare earth element different from the activating element, 0.1% by mass or more and 32% by mass or less of oxide particles containing a second rare earth element, and the balance of aluminum oxide particles, relative to 100% by mass of the total amount of the first rare earth aluminate fluorescent material particles, the oxide particles, and the aluminum oxide particles; preparing a molded body of the raw material mixture; and obtaining a sintered body by calcining the molded body in a temperature range of 1,550° C. or higher and 1,800° C. or lower.Type: ApplicationFiled: November 11, 2023Publication date: March 14, 2024Applicant: NICHIA CORPORATIONInventors: Toshiyuki HIRAI, Keisuke SUZUKI, Hirofumi OGURI
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Rare earth aluminate sintered compact and method for producing rare earth aluminate sintered compact
Patent number: 11897814Abstract: A rare earth aluminate sintered compact including rare earth aluminate phosphor crystalline phases and voids, wherein an absolute maximum length of 90% or more by number of rare earth aluminate phosphor crystalline phases is in a range from 0.4 ?m to 1.3 ?m, and an absolute maximum length of 90% or more by number of voids is in a range from 0.1 ?m to 1.2 ?m.Type: GrantFiled: August 4, 2021Date of Patent: February 13, 2024Assignee: NICHIA CORPORATIONInventors: Shozo Taketomi, Ryo Yamamoto, Tomomi Fujii, Toshiyuki Hirai -
Patent number: 11851375Abstract: A method for producing a ceramic complex includes: preparing a raw material mixture that contains 5% by mass or more and 40% by mass or less of first rare earth aluminate fluorescent material particles containing an activating element and a first rare earth element different from the activating element, 0.1% by mass or more and 32% by mass or less of oxide particles containing a second rare earth element, and the balance of aluminum oxide particles, relative to 100% by mass of the total amount of the first rare earth aluminate fluorescent material particles, the oxide particles, and the aluminum oxide particles; preparing a molded body of the raw material mixture; and obtaining a sintered body by calcining the molded body in a temperature range of 1,550° C. or higher and 1,800° C. or lower.Type: GrantFiled: June 29, 2021Date of Patent: December 26, 2023Assignee: NICHIA CORPORATIONInventors: Toshiyuki Hirai, Keisuke Suzuki, Hirofumi Oguri
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Patent number: 11585494Abstract: A fluorescent module includes a fluorescent member including a phosphor-containing layer, and a light reflecting layer disposed on the phosphor-containing layer. The phosphor-containing layer contains a YAG phosphor and a Ga-YAG phosphor within the same layer, the Ga-YAG phosphor being a phosphor in which a portion of the aluminum constituting the YAG phosphor is substituted with gallium. A volumetric ratio of the Ga-YAG phosphor to the entirety of the YAG phosphor and the Ga-YAG phosphor is in a range of 19.0% to 80%.Type: GrantFiled: August 24, 2021Date of Patent: February 21, 2023Assignee: NICHIA CORPORATIONInventors: Takafumi Sugiyama, Toshiyuki Hirai, Masahiko Sano, Toru Takasone
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Publication number: 20230026963Abstract: Provided is a light emitting device, including a light emitting element having a light emission peak wavelength in a range of 380 nm or more and 500 nm or less, and a wavelength converting member including a ceramic composite including an inorganic fluorescent material having a light emission peak wavelength in a range of 510 nm or more and 570 nm or less and an inorganic oxide, and a translucent thin film having a physical film thickness in a range of 82 nm or more and 140 nm or less and a refractive index smaller than the refractive index of the ceramic composite, disposed on a light emission side of the ceramic composite, the translucent thin film including a fluoride containing at least one kind of an element selected from the group consisting of an alkali metal element, an alkaline earth metal element, and a Group 13 metal element.Type: ApplicationFiled: July 7, 2022Publication date: January 26, 2023Applicant: NICHIA CORPORATIONInventors: Toshiyuki HIRAI, Gentaro TANAKA
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Patent number: 11498883Abstract: A method for producing a ceramic composite includes: preparing a sintered body in a plate form containing a fluorescent material having a composition of a rare earth aluminate, and aluminum oxide; and eluting the aluminum oxide from the sintered body by contacting the sintered body with a basic substance, for example, contained in an alkali aqueous solution, and the dissolution amount of the fluorescent material eluted from the sintered body in the step of eluting the aluminum oxide is 0.5% by mass or less based on an amount of the fluorescent material contained in the sintered body as 100% by mass.Type: GrantFiled: November 24, 2020Date of Patent: November 15, 2022Assignee: NICHIA CORPORATIONInventor: Toshiyuki Hirai
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Publication number: 20220186117Abstract: A ceramic complex including a first crystal phase containing a first rare earth aluminate fluorescent material containing an activating element and a first rare earth element that is different from the activating element, and a second crystal phase containing aluminum oxide, having a content of the first crystal phase in a range of 5% by volume or more and 40% by volume or less and a content of the second crystal phase in a range of 57% by volume or more and 95% by volume or less based on a total amount of the ceramic complex, having an average value of a second crystal diameter of the second crystal phase measured under the particular measurement condition of 12 ?m or less, and having a QD value of 0.5 or less expressed by QD=(D75?D25)/(D75+D25), wherein D25 and D75 are defined in the disclosure.Type: ApplicationFiled: December 10, 2021Publication date: June 16, 2022Applicant: NICHIA CORPORATIONInventors: Hirofumi OGURI, Toshiyuki HIRAI
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RARE EARTH ALUMINATE SINTERED COMPACT AND METHOD FOR PRODUCING RARE EARTH ALUMINATE SINTERED COMPACT
Publication number: 20220041509Abstract: A rare earth aluminate sintered compact including rare earth aluminate phosphor crystalline phases and voids, wherein an absolute maximum length of 90% or more by number of rare earth aluminate phosphor crystalline phases is in a range from 0.4 ?m to 1.3 ?m, and an absolute maximum length of 90% or more by number of voids is in a range from 0.1 ?m to 1.2 ?m.Type: ApplicationFiled: August 4, 2021Publication date: February 10, 2022Applicant: NICHIA CORPORATIONInventors: Shozo TAKETOMI, Ryo YAMAMOTO, Tomomi FUJII, Toshiyuki HIRAI -
Publication number: 20210403382Abstract: A method for producing a ceramic complex includes: preparing a raw material mixture that contains 5% by mass or more and 40% by mass or less of first rare earth aluminate fluorescent material particles containing an activating element and a first rare earth element different from the activating element, 0.1% by mass or more and 32% by mass or less of oxide particles containing a second rare earth element, and the balance of aluminum oxide particles, relative to 100% by mass of the total amount of the first rare earth aluminate fluorescent material particles, the oxide particles, and the aluminum oxide particles; preparing a molded body of the raw material mixture; and obtaining a sintered body by calcining the molded body in a temperature range of 1,550° C. or higher and 1,800° C. or lower.Type: ApplicationFiled: June 29, 2021Publication date: December 30, 2021Applicant: NICHIA CORPORATIONInventors: Toshiyuki HIRAI, Keisuke SUZUKI, Hirofumi OGURI
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Publication number: 20210381662Abstract: A fluorescent module includes a fluorescent member including a phosphor-containing layer, and a light reflecting layer disposed on the phosphor-containing layer. The phosphor-containing layer contains a YAG phosphor and a Ga-YAG phosphor within the same layer, the Ga-YAG phosphor being a phosphor in which a portion of the aluminum constituting the YAG phosphor is substituted with gallium. A volumetric ratio of the Ga-YAG phosphor to the entirety of the YAG phosphor and the Ga-YAG phosphor is in a range of 19.0% to 80%.Type: ApplicationFiled: August 24, 2021Publication date: December 9, 2021Inventors: Takafumi SUGIYAMA, Toshiyuki HIRAI, Masahiko SANO, Toru TAKASONE
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Patent number: 11131433Abstract: A fluorescent module includes a fluorescent member, a heat dissipation member, and an optical relaxation member. The fluorescent member includes a phosphor-containing layer, and a light reflecting layer. The fluorescent member is secured to the heat dissipation member so that the light reflecting layer is arranged between the phosphor-contacting layer and the heat dissipation member. The optical relaxation member is configured to absorb and/or diffuse light. The optical relaxation member is arranged with respect to the fluorescent member so that the light reflecting layer is arranged between the phosphor-containing layer and the optical relaxation member.Type: GrantFiled: August 8, 2019Date of Patent: September 28, 2021Assignee: NICHIA CORPORATIONInventors: Takafumi Sugiyama, Toshiyuki Hirai, Masahiko Sano, Toru Takasone
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Publication number: 20210163371Abstract: A method for producing a ceramic composite includes: preparing a sintered body in a plate form containing a fluorescent material having a composition of a rare earth aluminate, and aluminum oxide; and eluting the aluminum oxide from the sintered body by contacting the sintered body with a basic substance, for example, contained in an alkali aqueous solution, and the dissolution amount of the fluorescent material eluted from the sintered body in the step of eluting the aluminum oxide is 0.5% by mass or less based on an amount of the fluorescent material contained in the sintered body as 100% by mass.Type: ApplicationFiled: November 24, 2020Publication date: June 3, 2021Applicant: NICHIA CORPORATIONInventor: Toshiyuki HIRAI
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Patent number: 10745543Abstract: There is provided a rubber composition in which an antistatic agent is uniformly dispersed and the rubber composition has antistatic ability, coefficient of friction, and wear resistance. A rubber composition includes 7 parts by mass or more of a polyether/polyolefin block copolymer resin with respect to 100 parts by mass of a rubber component, and the total amount or a part of a rubber component is mixed with a polyether/polyolefin block copolymer resin at a temperature that is equal to or higher than a melting point of the polyether/polyolefin block copolymer resin.Type: GrantFiled: May 29, 2018Date of Patent: August 18, 2020Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Yudai Okuno, Masashi Hamakubo, Akihiro Mine, Toshiyuki Hirai, Yoshihiro Yamada
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Publication number: 20200056751Abstract: A fluorescent module includes a fluorescent member, a heat dissipation member, and an optical relaxation member. The fluorescent member includes a phosphor-containing layer, and a light reflecting layer. The fluorescent member is secured to the heat dissipation member so that the light reflecting layer is arranged between the phosphor-contacting layer and the heat dissipation member. The optical relaxation member is configured to absorb and/or diffuse light. The optical relaxation member is arranged with respect to the fluorescent member so that the light reflecting layer is arranged between the phosphor-containing layer and the optical relaxation member.Type: ApplicationFiled: August 8, 2019Publication date: February 20, 2020Inventors: Takafumi SUGIYAMA, Toshiyuki HIRAI, Masahiko SANO, Toru TAKASONE
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Publication number: 20200002109Abstract: Provided are a rubber composition capable of imparting a high tensile strength to a roller main body so as to be able to be used for equipment that allows paper to pass through at high speed, while maintaining high abrasion resistance of the roller main body and a favorable paper feeding performance of the paper feeding roller; and a paper feeding roller. There is provided a rubber composition contains: a rubber that includes a non-oil extended EPDM having an ethylene content of 55 to 72%; and more than 20 parts by mass and 30 parts by mass or less of a filler, and 2.5 parts by mass or more of a peroxide crosslinking agent per 100 parts by mass of the rubber, in which the filler contains 15 to 30 parts by mass of an amorphous silica per 100 parts by mass of the rubber.Type: ApplicationFiled: March 28, 2019Publication date: January 2, 2020Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: MASASHI HAMAKUBO, TOSHIYUKI HIRAI, YOSHIHIRO YAMADA
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Patent number: 10261460Abstract: A paper feed roller of the present invention comprises a roller body 2 integrally formed of elastic material in a cylindrical shape in which a plurality of protruding lines 6 are disposed on a peripheral surface 5 at even intervals, wherein the roller body 2 is formed so that crest portions 6a and trough portions 6b are continuously provided in a circumferential direction, an opening angle ? is equal to or more than 2° and is equal to or less than 8°, a radial height h of the protruding line is equal to or more than 0.051 mm and is equal to or less than 0.1 mm, and a curvature radius r1 at a shoulder is equal to or more than 0.55 mm.Type: GrantFiled: September 27, 2016Date of Patent: April 16, 2019Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Hirofumi Konishi, Akihiro Mine, Toshiyuki Hirai, Yoshihiro Yamada, Yudai Okuno, Yuichi Sato
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Publication number: 20190016875Abstract: There is provided a rubber composition in which an antistatic agent is uniformly dispersed and the rubber composition has antistatic ability, coefficient of friction, and wear resistance. A rubber composition includes 7 parts by mass or more of a polyether/polyolefin block copolymer resin with respect to 100 parts by mass of a rubber component, and the total amount or a part of a rubber component is mixed with a polyether/polyolefin block copolymer resin at a temperature that is equal to or higher than a melting point of the polyether/polyolefin block copolymer resin.Type: ApplicationFiled: May 29, 2018Publication date: January 17, 2019Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: YUDAI OKUNO, MASASHI HAMAKUBO, AKIHIRO MINE, TOSHIYUKI HIRAI, YOSHIHIRO YAMADA