Patents by Inventor Toshiya Yamaguchi
Toshiya Yamaguchi 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: 11644663Abstract: A light deflector, a method of manufacturing the light deflector, and an image projector. The light deflector and the method includes forming a first wafer provided with a plurality of movable mirror units, bonding the first wafer to be sandwiched between a second wafer on which a plurality of base units are formed and a third wafer on which a plurality of spacers are formed, bonding a fourth wafer on which a plurality of transparent members are formed on the third wafer, bonding a plurality of polyhedron light-beam adjusters on the fourth wafer such that one of the plurality of polyhedron light-beam adjusters and the movable mirror unit become a pair, and cutting a wafer layered product of the first to fourth wafers for each area in which the light deflector is formed. The image projector includes the light deflector, and an image is projected by optical scanning.Type: GrantFiled: May 16, 2019Date of Patent: May 9, 2023Assignee: Ricoh Company, Ltd.Inventors: Toshiya Yamaguchi, Toshiyuki Ikeoh
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Patent number: 11502479Abstract: An optical device and a light-source device. The optical device includes a first substrate having a first plane and elements, and a second substrate having a second face that faces the first plane. The elements are disposed on the first substrate to emit or receive light in a direction intersecting with the first plane. The second substrate includes lenses disposed to correspond to the elements, and the second substrate extends in a first direction parallel to the second face to contact the first plane. The second substrate has a joint used to determine spacing between the first substrate and the second substrate, and the joint contacts the first substrate with an area smaller than a maximum size of cross-sectional area parallel to the second face of the joint. The light-source device includes the optical device and a driver to drive the optical device.Type: GrantFiled: June 5, 2020Date of Patent: November 15, 2022Assignee: Ricoh Company, Ltd.Inventors: Toshiya Yamaguchi, Masami Seto
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Publication number: 20200403373Abstract: An optical device and a light-source device. The optical device includes a first substrate having a first plane and elements, and a second substrate having a second face that faces the first plane. The elements are disposed on the first substrate to emit or receive light in a direction intersecting with the first plane. The second substrate includes lenses disposed to correspond to the elements, and the second substrate extends in a first direction parallel to the second face to contact the first plane. The second substrate has a joint used to determine spacing between the first substrate and the second substrate, and the joint contacts the first substrate with an area smaller than a maximum size of cross-sectional area parallel to the second face of the joint. The light-source device includes the optical device and a driver to drive the optical device.Type: ApplicationFiled: June 5, 2020Publication date: December 24, 2020Applicant: Ricoh Company, Ltd.Inventors: TOSHIYA YAMAGUCHI, MASAMI SETO
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Patent number: 10619950Abstract: A stainless steel that includes chromium and other alloying element as a plurality of alloying elements including: a base material layer including chromium of a specified chromium content necessary for forming a passive film or more; and a superficial layer including chromium at a lower chromium content than the chromium content contained in the base material layer, and the superficial layer including the other alloying elements at a same content of the other alloying element as the content of the other alloying element contained in the base material layer.Type: GrantFiled: April 2, 2014Date of Patent: April 14, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yu Takanezawa, Izuru Yamamoto, Keisuke Kadota, Hironori Aoyama, Toshiya Yamaguchi
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Publication number: 20190369387Abstract: A light deflector, a method of manufacturing the light deflector, and an image projector. The light deflector and the method includes forming a first wafer provided with a plurality of movable mirror units, bonding the first wafer to be sandwiched between a second wafer on which a plurality of base units are formed and a third wafer on which a plurality of spacers are formed, bonding a fourth wafer on which a plurality of transparent members are formed on the third wafer, bonding a plurality of polyhedron light-beam adjusters on the fourth wafer such that one of the plurality of polyhedron light-beam adjusters and the movable mirror unit become a pair, and cutting a wafer layered product of the first to fourth wafers for each area in which the light deflector is formed. The image projector includes the light deflector, and an image is projected by optical scanning.Type: ApplicationFiled: May 16, 2019Publication date: December 5, 2019Applicant: Ricoh Company, Ltd.Inventors: TOSHIYA YAMAGUCHI, TOSHIYUKI IKEOH
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Patent number: 9500778Abstract: An optical element having an antireflection effect includes an incident plane and an emission plane and a conical microstructure formed on at least one plane of the incident plane and the emission plane. The conical microstructure includes a first structure formed of a plurality of conical microprojections with an average height H1 and a second structure formed of a plurality of conical microrecesses with an average height H2. The average height H1 satisfies an inequality H1?1/3*?/n and the average height H2 satisfies an inequality H2?1/3*?/n. An average pitch P between the first structure and the second structure satisfies following conditions: H1/2?P?1/3*?/n, and H2/2?P?1/3*?/n, in which the use wavelength is defined as ? and the refractive index relative to the use wavelength is n.Type: GrantFiled: January 24, 2014Date of Patent: November 22, 2016Assignee: Ricoh Company, Ltd.Inventors: Chieko Hatashita, Takayuki Nakamura, Kentaroh Hagita, Toshiya Yamaguchi
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Publication number: 20160060720Abstract: A stainless steel that includes chromium and other alloying element as a plurality of alloying elements including: a base material layer including chromium of a specified chromium content necessary for forming a passive film or more; and a superficial layer including chromium at a lower chromium content than the chromium content contained in the base material layer, and the superficial layer including the other alloying elements at a same content of the other alloying element as the content of the other alloying element contained in the base material layer.Type: ApplicationFiled: April 2, 2014Publication date: March 3, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yu TAKANEZAWA, Izuru YAMAMOTO, Keisuke KADOTA, Hironori AOYAMA, Toshiya YAMAGUCHI
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Patent number: 8916268Abstract: An iron powder for dust cores is provided which can be formed into a dust core having a high resistivity and having a low iron loss without degrading the mechanical strength. The iron powder for dust cores includes an iron powder and an oxide film on the surface thereof, wherein the oxide film is composed of a Si-based oxide in which the ratio of Si to Fe satisfies Si/Fe?0.8 on an atomic number basis.Type: GrantFiled: December 11, 2008Date of Patent: December 23, 2014Assignees: JFE Steel Corporation, Toyota Jidosha Kabushiki KaishaInventors: Takashi Kawano, Noriko Makiishi, Tatsuhiko Hiratani, Naomichi Nakamura, Yusuke Oishi, Eisuke Hoshina, Toshiya Yamaguchi, Daisuke Okamoto, Takeshi Hattori
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Publication number: 20140211302Abstract: An optical element having an antireflection effect includes an incident plane and an emission plane and a conical microstructure formed on at least one plane of the incident plane and the emission plane. The conical microstructure includes a first structure formed of a plurality of conical microprojections with an average height H1 and a second structure formed of a plurality of conical microrecesses with an average height H2. The average height H1 satisfies an inequality H1?1/3*?/n and the average height H2 satisfies an inequality H2?1/3*?/n. An average pitch P between the first structure and the second structure satisfies following conditions: H1/2?P?1/3*?/n, and H2/2?P?1/3*?/n, in which the use wavelength is defined as X and the refractive index relative to the use wavelength is n.Type: ApplicationFiled: January 24, 2014Publication date: July 31, 2014Applicant: Ricoh Company, Ltd.Inventors: Chieko HATASHITA, Takayuki NAKAMURA, Kentaroh HAGITA, Toshiya YAMAGUCHI
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Publication number: 20130336832Abstract: A reactor core, which has a pair of press surfaces (a-b planar surfaces) formed by compression molding with an edge part of each of the press surfaces being plastically formed by pressure treatment, is disposed in a direction in which a magnetic flux generated upon energization of a coil does not penetrate each of the press surfaces.Type: ApplicationFiled: July 24, 2013Publication date: December 19, 2013Applicant: Toyota Jidosha Kabushiki KaishaInventors: Masaki SUGIYAMA, Toshiya Yamaguchi, Tomonori Inuzuka
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Patent number: 8414984Abstract: A method for manufacturing a powder for a magnetic core including at least a process of performing a siliconizing treatment on a surface of an iron powder containing elemental carbon. In the process of siliconizing treatment, a powder containing at least a silicon dioxide is brought into contact with the surface of the iron powder, elemental silicon is detached from the silicon dioxide by heating the powder of silicon dioxide, and the siliconizing treatment is performed by causing the detached elemental silicon to permeate and diffuse into a surface layer of the iron powder. The invention provides a method for manufacturing a powder for a magnetic core, by which loss reduction is achieved.Type: GrantFiled: November 11, 2008Date of Patent: April 9, 2013Assignees: Toyota Jidosha Kabushiki Kaisha, Fine Sinter Co., Ltd.Inventors: Eisuke Hoshina, Toshiya Yamaguchi, Yusuke Oishi, Tomoyasu Kitano, Kazuhiro Kawashima, Junghwan Hwang
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Patent number: 8337638Abstract: A powder for a dust core comprising a silicon-containing layer formed within a depth of less than 0.15 D from the surface of the surface layer of a soft magnetic metal powder having a particle diameter D and a method for producing the same are provided.Type: GrantFiled: April 17, 2009Date of Patent: December 25, 2012Assignees: Toyota Jidosha Kabushiki Kaisha, Fine Sinter Co., LtdInventors: Yusuke Oishi, Eisuke Hoshina, Toshiya Yamaguchi, Kazuhiro Kawashima
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Patent number: 8241557Abstract: An object of the present invention is to provide a method for producing a dust core wherein generation of iron oxide at grain boundaries in the dust core is unlikely to take place upon annealing of the dust core subjected to compaction, thus allowing excellent electromagnetic characteristics to be realized. Also, the following is provided: a method for producing a dust core, which comprises: a step of molding a magnetic powder comprising a powder for a dust core formed with an iron-based magnetic powder coated with a silicone resin into a dust core via compaction; and a step of annealing the dust core via heating so as to cause the silicone resin contained in the dust core to be partially formed into a silicate compound, wherein annealing of the dust core is carried out at a dew point of an inert gas of ?40° C. or lower in an inert gas atmosphere in the annealing step.Type: GrantFiled: July 22, 2011Date of Patent: August 14, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Masaki Sugiyama, Toshiya Yamaguchi, Shinjiro Saigusa, Mitsutoshi Akiyama
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Publication number: 20120012777Abstract: A powder for dust core including a soft magnetic metal powder and a silicon impregnated layer made of silicon concentrated in a surface layer of the soft magnetic metal powder, in which a silicon dioxide powder is diffusion-bonded to a surface of the silicon impregnated layer to form a diffusion-bonded part while a part of the silicon dioxide powder is impregnated and diffused in the silicon impregnated layer and the other part of the same protrudes from the surface of the silicon impregnated layer. The diffusion-bonded part creates a gap with respect to another powder for dust core, thereby providing increased specific resistance.Type: ApplicationFiled: September 21, 2010Publication date: January 19, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masaki Sugiyama, Toshiya Yamaguchi, Shota Ohira, Takeshi Hattori, Yusuke Oishi
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Publication number: 20110284794Abstract: To provide a method of manufacturing a powder for dust core capable of preventing generation of secondary particles during a siliconizing treatment and improving quality and productivity of the powder for dust core, a dust core made of the powder for dust core manufactured by the method, and an apparatus for manufacturing the powder for dust core, of a powder mixture comprising a soft magnetic metal powder and a powder for siliconizing including silicon dioxide, only the soft magnetic metal powder is heated by induction heating to transmit heat from the surface of the soft magnetic metal powder to the powder for siliconizing, thereby releasing a silicon element from the powder for siliconizing and diffusing and impregnating the silicon element into the surface of the soft magnetic metal powder to form a silicon impregnated layer.Type: ApplicationFiled: March 2, 2010Publication date: November 24, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masaki Sugiyama, Toshiya Yamaguchi, Shouta Ohira
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Publication number: 20110274576Abstract: An object of the present invention is to provide a method for producing a dust core wherein generation of iron oxide at grain boundaries in the dust core is unlikely to take place upon annealing of the dust core subjected to compaction, thus allowing excellent electromagnetic characteristics to be realized. Also, the following is provided: a method for producing a dust core, which comprises: a step of molding a magnetic powder comprising a powder for a dust core formed with an iron-based magnetic powder coated with a silicone resin into a dust core via compaction; and a step of annealing the dust core via heating so as to cause the silicone resin contained in the dust core to be partially formed into a silicate compound, wherein annealing of the dust core is carried out at a dew point of an inert gas of ?40° C. or lower in an inert gas atmosphere in the annealing step.Type: ApplicationFiled: July 22, 2011Publication date: November 10, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masaki SUGIYAMA, Toshiya YAMAGUCHI, Shinjiro SAIGUSA, Mitsutoshi AKIYAMA
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Publication number: 20110110037Abstract: Provided is a driver module structure capable of ensuring high reliability. A PDP driver device 1 includes: a flexible substrate 2 having an interconnect pattern; a semiconductor device 3 placed on the flexible substrate 2; and a heat dissipating body 4 having a recess 41 configured to accommodate the semiconductor device 3. The heat dissipating body 4 is provided with four grooves 8 as airflow paths that connect a space in the recess 41 to the outside, and the grooves 8 have a substantially V-shaped cross section.Type: ApplicationFiled: January 7, 2009Publication date: May 12, 2011Inventors: Toshiya Yamaguchi, Shigeo Yumoto, Hirofumi Kamikokuryou, Keita Yamamoto
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Publication number: 20110025444Abstract: A reactor core, which has a pair of press surfaces (a-b planar surfaces) formed by compression molding with an edge part of each of the press surfaces being plastically formed by pressure treatment, is disposed in a direction in which a magnetic flux generated upon energization of a coil does not penetrate each of the press surfaces.Type: ApplicationFiled: March 16, 2009Publication date: February 3, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masaki Sugiyama, Toshiya Yamaguchi, Tomonori Inuzuka
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Publication number: 20110024000Abstract: A powder for a dust core comprising a silicon-containing layer formed within a depth of less than 0.15 D from the surface of the surface layer of a soft magnetic metal powder having a particle diameter D and a method for producing the same are provided.Type: ApplicationFiled: April 17, 2009Publication date: February 3, 2011Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, FINE SINTER CO., LTD.Inventors: Yusuke Oishi, Eisuke Hoshina, Toshiya Yamaguchi, Kazuhiro Kawashima
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Publication number: 20100271158Abstract: A method for manufacturing a powder for a magnetic core including at least a process of performing a siliconizing treatment on a surface of an iron powder containing elemental carbon. In the process of siliconizing treatment, a powder containing at least a silicon dioxide is brought into contact with the surface of the iron powder, elemental silicon is detached from the silicon dioxide by heating the powder of silicon dioxide, and the siliconizing treatment is performed by causing the detached elemental silicon to permeate and diffuse into a surface layer of the iron powder. The invention provides a method for manufacturing a powder for a magnetic core, by which loss reduction is achieved.Type: ApplicationFiled: November 11, 2008Publication date: October 28, 2010Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, FINE SINTER CO., LTD.Inventors: Eisuke Hoshina, Toshiya Yamaguchi, Yusuke Oishi, Tomoyasu Kitano, Kazuhiro Kawashima, Junghwan Hwang