Patents by Inventor Kou Yamada
Kou Yamada 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: 7738752Abstract: It is made possible to provide an optical waveguide system that has a coupling mechanism capable of selecting a wavelength and has the highest possible conversion efficiency, and that is capable of providing directivity in the light propagation direction. An optical waveguide system includes: a three-dimensional photonic crystalline structure including crystal pillars and having a hollow structure inside thereof; an optical waveguide in which a plurality of metal nanoparticles are dispersed in a dielectric material, the optical waveguide having an end portion inserted between the crystal pillars of the three-dimensional photonic crystalline structure, and containing semiconductor quantum dots that are located adjacent to the metal nanoparticles and emit near-field light when receiving excitation light, the metal nanoparticles exciting surface plasmon when receiving the near-field light; and an excitation light source that emits the excitation light for exciting the semiconductor quantum dots.Type: GrantFiled: July 1, 2009Date of Patent: June 15, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Masakazu Yamagiwa, Kenji Todori, Reiko Yoshimura, Miho Maruyama, Kou Yamada, Yasuyuki Hotta, Tsukasa Tada
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Publication number: 20100021104Abstract: It is made possible to provide an optical waveguide system that has a coupling mechanism capable of selecting a wavelength and has the highest possible conversion efficiency, and that is capable of providing directivity in the light propagation direction. An optical waveguide system includes: a three-dimensional photonic crystalline structure including crystal pillars and having a hollow structure inside thereof; an optical waveguide in which a plurality of metal nanoparticles are dispersed in a dielectric material, the optical waveguide having an end portion inserted between the crystal pillars of the three-dimensional photonic crystalline structure, and containing semiconductor quantum dots that are located adjacent to the metal nanoparticles and emit near-field light when receiving excitation light, the metal nanoparticles exciting surface plasmon when receiving the near-field light; and an excitation light source that emits the excitation light for exciting the semiconductor quantum dots.Type: ApplicationFiled: July 1, 2009Publication date: January 28, 2010Inventors: Masakazu YAMAGIWA, Kenji TODORI, Reiko YOSHIMURA, Miho MARUYAMA, Kou YAMADA, Yasuyuki HOTTA, Tsukasa TADA
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Patent number: 7515871Abstract: An image forming system having an image forming apparatus and a post-processing apparatus having a sorting function, a stapling function, etc. The post-processing apparatus is movable between a first position to receive long papers and a second position to receive non-long papers. When the post-processing apparatus is set in the second position, a paper inlet port of the post-processing apparatus faces a paper ejection port of the image forming apparatus.Type: GrantFiled: July 15, 2005Date of Patent: April 7, 2009Assignee: Konica Minolta Business Technologies, Inc.Inventors: Hideo Mae, Kazuo Okunishi, Tatsutoshi Yamada, Atsushi Kawai, Yoshihiko Yoshizaki, Kou Yamada
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Patent number: 7469083Abstract: An optical waveguide includes a propagating light waveguide, a coupler including a photonic crystal, and a surface plasmon waveguide, the propagating light waveguide, the coupler, and the surface plasmon waveguide being disposed in one plane along a waveguiding direction.Type: GrantFiled: March 17, 2008Date of Patent: December 23, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Kenji Todori, Reiko Yoshimura, Tsukasa Tada, Kou Yamada, Miho Maruyama
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Publication number: 20080240652Abstract: An optical waveguide includes a propagating light waveguide, a coupler including a photonic crystal, and a surface plasmon waveguide, the propagating light waveguide, the coupler, and the surface plasmon waveguide being disposed in one plane along a waveguiding direction.Type: ApplicationFiled: March 17, 2008Publication date: October 2, 2008Inventors: Kenji TODORI, Reiko Yoshimura, Tsukasa Tada, Kou Yamada, Miho Maruyama
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Patent number: 7329458Abstract: Disclosed is a wiring member comprising a sheet-like porous substrate provided with a large number of open-cells which are three-dimensionally branched and opened to a first major surface as well as to a second major surface of the porous substrate, and a conductive portion formed on the first major surface of the porous substrate and formed at least partially an inter-penetrating structure together with the porous substrate at an interface of the porous substrate. The apertures of the open-cells on the first major surface have an average diameter and an average number of the apertures, at least one of which is smaller than that of the second major surface.Type: GrantFiled: October 29, 2003Date of Patent: February 12, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Toshiro Hiraoka, Yasuyuki Hotta, Shigeru Matake, Misa Sawanobori, Kou Yamada
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Patent number: 7228090Abstract: It is intended to provide an image forming apparatus capable of securing rotation transmission accuracy among input/output axes without giving stress to a holding portion despite shaft misalignment and without using material of high strength. A color printer 1 comprises a main body 2 and an image forming unit 30 removable from the main body 2. The main body 2 includes a gear 43 for receiving rotary driving force to the image forming unit 30 and a joint 45 and the image forming unit 30 has a coupling 36 for receiving rotary driving force from the main body 2. Furthermore, a joint holder section 43a for the gear 43 and the coupling 36 has a contact hole 47, and contact hole 36a, respectively and both ends of the joint 45 are inserted in those holes. The contact holes 47 and 36a are in not-twisted triangle pole shape and the joint 45 is in twisted triangle pole shape.Type: GrantFiled: November 4, 2004Date of Patent: June 5, 2007Assignee: Konica Minolta Business Technologies, Inc.Inventors: Yoshiyuki Toso, Nozomu Kondo, Kou Yamada, Tooru Watanabe, Syuichi Katogi, Shigeru Tashiro, Tetsuya Kagawa
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Patent number: 7209693Abstract: A controller of a color copier according to the invention includes a drive controller section, a pattern generation section, and a velocity information acquisition section. The drive controller section changes the phase relationship in rotation angle between a drive roller driving the transfer belt and individual photosensitive drums of a plurality of imaging sections. The pattern generation section forms registered marks on the transfer belt by using the plurality of imaging sections before and after the drive controller section changes the phase relationship. The velocity information acquisition section acquires at least one of a velocity fluctuation component of individual photosensitive drums and a velocity fluctuation component of the transfer belt in accordance with the result of sensing by a mark sensor for two registered marks formed by the pattern generation section.Type: GrantFiled: October 28, 2004Date of Patent: April 24, 2007Assignee: Konica Minolta Business Technologies, Inc.Inventors: Yuta Tachibana, Teruhiko Fujikura, Kou Yamada
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Publication number: 20060204253Abstract: An image forming system having an image forming apparatus and a post-processing apparatus having a sorting function, a stapling function, etc. The post-processing apparatus is movable between a first position to receive long papers and a second position to receive non-long papers. When the post-processing apparatus is set in the second position, a paper inlet port of the post-processing apparatus faces a paper ejection port of the image forming apparatus.Type: ApplicationFiled: July 15, 2005Publication date: September 14, 2006Applicant: Konica Minolta Business Technologies, Inc.Inventors: Hideo Mae, Kazuo Okunishi, Tatsutoshi Yamada, Atsushi Kawai, Yoshihiko Yoshizaki, Kou Yamada
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Publication number: 20050271429Abstract: A controller of a color copier according to the invention includes a drive controller section, a pattern generation section, and a velocity information acquisition section. The drive controller section changes the phase relationship in rotation angle between a drive roller driving the transfer belt and individual photosensitive drums of a plurality of imaging sections. The pattern generation section forms registered marks on the transfer belt by using the plurality of imaging sections before and after the drive controller section changes the phase relationship. The velocity information acquisition section acquires at least one of a velocity fluctuation component of individual photosensitive drums and a velocity fluctuation component of the transfer belt in accordance with the result of sensing by a mark sensor for two registered marks formed by the pattern generation section.Type: ApplicationFiled: October 28, 2004Publication date: December 8, 2005Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Yuta Tachibana, Teruhiko Fujikura, Kou Yamada
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Publication number: 20050191092Abstract: It is intended to provide an image forming apparatus capable of securing rotation transmission accuracy among input/output axes without giving stress to a holding portion despite shaft misalignment and without using material of high strength. A color printer 1 comprises a main body 2 and an image forming unit 30 removable from the main body 2. The main body 2 includes a gear 43 for receiving rotary driving force to the image forming unit 30 and a joint 45 and the image forming unit 30 has a coupling 36 for receiving rotary driving force from the main body 2. Furthermore, a joint holder section 43a for the gear 43 and the coupling 36 has a contact hole 47, and contact hole 36a, respectively and both ends of the joint 45 are inserted in those holes. The contact holes 47 and 36a are in not-twisted triangle pole shape and the joint 45 is in twisted triangle pole shape.Type: ApplicationFiled: November 4, 2004Publication date: September 1, 2005Applicant: Konica Minolta Business Technologies, Inc.Inventors: Yoshiyuki Toso, Nozomu Kondo, Kou Yamada, Tooru Watanabe, Syuichi Katogi, Shigeru Tashiro, Tetsuya Kagawa
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Publication number: 20040191497Abstract: Disclosed is a wiring member comprising a sheet-like porous substrate provided with a large number of open-cells which are three-dimensionally branched and opened to a first major surface as well as to a second major surface of the porous substrate, and a conductive portion formed on the first major surface of the porous substrate and formed at least partially an inter-penetrating structure together with the porous substrate at an interface of the porous substrate. The apertures of the open-cells on the first major surface have an average diameter and an average number of the apertures, at least one of which is smaller than that of the second major surface.Type: ApplicationFiled: October 29, 2003Publication date: September 30, 2004Inventors: Toshiro Hiraoka, Yasuyuki Hotta, Shigeru Matake, Misa Sawanobori, Kou Yamada
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Patent number: 6257572Abstract: An image forming apparatus comprises a main body and a sheet post-processing unit. The main body has a first discharge path, a second discharge path, a first mounting portion and a second mounting portion. The sheet post-processing unit has a first sheet receiving path and a second sheet receiving path each connecting to a common sheet transport path, a first mounting portion and a second mounting portion. The first discharge path is connected to the first sheet receiving path by coupling the first mounting portion of the main body to the first mounting portion of the sheet post-processing unit. The second discharge path is connected to the second sheet receiving path by coupling the second mounting portion of the main body to the second mounting portion of the sheet post-processing unit. By providing the plurality of mounting portions in the top and side portions of the main body, the sheet post-processing unit can easily be disposed on the top or side of the main body.Type: GrantFiled: September 7, 1999Date of Patent: July 10, 2001Assignee: Minolta Co., Ltd.Inventors: Kou Yamada, Yuuji Takarabe, Shinji Matsumoto