Patents by Inventor Katsuhisa Homma
Katsuhisa Homma 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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Publication number: 20170329023Abstract: According to the embodiment, a radiation detector includes an array substrate, a scintillator layer, a wall body, a filling body, and a moisture-resistant body. A peripheral portion of the scintillator layer has a tapered shape in a direction toward outside. The filling body adheres to an inner side surface of the wall body. The filling body is close or adhering to the peripheral portion of the scintillator layer having the tapered shape. The filling body fills a space above the peripheral portion of the scintillator layer. A height of an upper surface of the filling body is close to a height of an upper surface of the wall body.Type: ApplicationFiled: December 5, 2016Publication date: November 16, 2017Applicant: Toshiba Electron Tubes & Devices Co., Ltd.Inventors: Katsuhisa HOMMA, Koji TAKATORI, Hiroshi Horiuchi, Satoshi Ichikawa
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Patent number: 9810791Abstract: According to the embodiment, a radiation detector includes an array substrate including a photoelectric conversion element, a scintillator layer formed on the photoelectric conversion element and converting radiation to fluorescence, and a moisture-proof layer including a surface-smoothing layer which is a continuous film formed to cover the scintillator layer and including at least an organic resin material as a main component and a moisture-proof layer which is a continuous film formed on a surface of the smoothed layer by direct film formation and consisting from inorganic material.Type: GrantFiled: December 8, 2015Date of Patent: November 7, 2017Assignee: Toshiba Electron Tubes & Devices Co., Ltd.Inventor: Katsuhisa Homma
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Publication number: 20170254908Abstract: According to the embodiment, a radiation detector includes an array substrate, a scintillator layer, a wall body, and a filled portion, where the array substrate includes a substrate and multiple photoelectric conversion elements, the multiple photoelectric conversion elements are provided on one surface side of the substrate, the scintillator layer includes a first fluorescent material and is provided on the multiple photoelectric conversion elements, the wall body surrounds the scintillator layer and is provided on the one surface side of the substrate, and the filled portion includes a second fluorescent material and is provided between the scintillator layer and the wall body. The scintillator layer includes a tilted portion in a peripheral edge portion of the scintillator layer; and a thickness of the tilted portion gradually decreases toward the outer side of the scintillator layer. The filled portion is provided on the tilted portion.Type: ApplicationFiled: May 24, 2017Publication date: September 7, 2017Applicant: Toshiba Electron Tubes & devices Co., LtdInventors: Katsuhisa HOMMA, Koji TAKATORI
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Publication number: 20160091616Abstract: According to the embodiment, a radiation detector includes an array substrate including a photoelectric conversion element, a scintillator layer formed on the photoelectric conversion element and converting radiation to fluorescence, and a moisture-proof layer including a surface-smoothing layer which is a continuous film formed to cover the scintillator layer and including at least an organic resin material as a main component and a moisture-proof layer which is a continuous film formed on a surface of the smoothed layer by direct film formation and consisting from inorganic material.Type: ApplicationFiled: December 8, 2015Publication date: March 31, 2016Applicants: Kabushiki Kaisha Toshiba, Toshiba Electron Tubes & Devices Co., Ltd.Inventor: Katsuhisa HOMMA
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Patent number: 9223032Abstract: Provided is a composition for reflective film comprising a polyvinyl acetal resin, an epoxidized vegetable oil, a solvent, a coupling agent and titanium oxide.Type: GrantFiled: April 4, 2014Date of Patent: December 29, 2015Assignee: TOSHIBA ELECTRON TUBES & DEVICES CO., LTD.Inventors: Shinetsu Fujieda, Katsuhisa Homma, Akiko Suzuki, Tatsuoki Kono
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Patent number: 9158006Abstract: Provided is a composition for reflective film comprising a polyvinyl acetal resin, an epoxidized vegetable oil, a solvent, a coupling agent and titanium oxide.Type: GrantFiled: July 13, 2009Date of Patent: October 13, 2015Assignee: TOSHIBA ELECTRON TUBES & DEVICES CO., LTD.Inventors: Shinetsu Fujieda, Katsuhisa Homma, Akiko Suzuki, Tatsuoki Kono
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Patent number: 8853808Abstract: According to one embodiment, a radiation detector includes a substrate, a scintillator layer, a moisture-proof body and an adhesive layer. The substrate is partitioned into at least an active area and a bonding area. The substrate includes a photoelectric conversion element located in the active area and configured to convert fluorescence to an electrical signal, an organic resin protective layer located at an outermost layer in the active area, and an inorganic protective film located at an outermost layer of the bonding area. The scintillator layer is formed on the organic resin protective layer so as to cover the photoelectric conversion element and configured to convert radiation to the fluorescence. The moisture-proof body is formed so as to cover the scintillator layer. The adhesive layer is formed on the inorganic protective film and bonds the moisture-proof body to the substrate.Type: GrantFiled: August 1, 2013Date of Patent: October 7, 2014Assignees: Kabushiki Kaisha Toshiba, Toshiba Electron Tubes & Devices Co., Ltd.Inventor: Katsuhisa Homma
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Publication number: 20140217296Abstract: Provided is a composition for reflective film comprising a polyvinyl acetal resin, an epoxidized vegetable oil, a solvent, a coupling agent and titanium oxide.Type: ApplicationFiled: April 4, 2014Publication date: August 7, 2014Applicant: Toshiba Electron Tubes & Devices Co., Ltd.Inventors: Shinetsu Fujieda, Katsuhisa Homma, Akiko Suzuki, Tatsuoki Kono
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Publication number: 20130313667Abstract: According to one embodiment, a radiation detector includes a substrate, a scintillator layer, a moisture-proof body and an adhesive layer. The substrate is partitioned into at least an active area and a bonding area. The substrate includes a photoelectric conversion element located in the active area and configured to convert fluorescence to an electrical signal, an organic resin protective layer located at an outermost layer in the active area, and an inorganic protective film located at an outermost layer of the bonding area. The scintillator layer is formed on the organic resin protective layer so as to cover the photoelectric conversion element and configured to convert radiation to the fluorescence. The moisture-proof body is formed so as to cover the scintillator layer. The adhesive layer is formed on the inorganic protective film and bonds the moisture-proof body to the substrate.Type: ApplicationFiled: August 1, 2013Publication date: November 28, 2013Applicants: Toshiba Electron Tubes & Devices Co., Ltd., Kabushiki Kaisha ToshibaInventor: Katsuhisa Homma
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Patent number: 8497481Abstract: According to one embodiment, a radiation detector comprises an array substrate having thereon a photoelectric conversion element for converting fluorescence into an electrical signal and having the outermost layer covered with a protective film, a scintillator layer provided on the protective film and converting incident radiation into fluorescence, and a reflective layer filmed by coating and drying paste-like material containing light-scattering particles and a binder provided on the scintillator layer, wherein the protective film is made of a thermoplastic resin having a softening point not higher than the film formation temperature of the scintillator layer and extending on the array substrate over an area of the reflective layer.Type: GrantFiled: April 27, 2012Date of Patent: July 30, 2013Assignees: Kabushiki Kaisha Toshiba, Toshiba Electron Tubes & Devices Co., Ltd.Inventors: Yuichi Shinba, Katsuhisa Homma
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Publication number: 20120267539Abstract: According to one embodiment, a radiation detector comprises an array substrate having thereon a photoelectric conversion element for converting fluorescence into an electrical signal and having the outermost layer covered with a protective film, a scintillator layer provided on the protective film and converting incident radiation into fluorescence, and a reflective layer filmed by coating and drying paste-like material containing light-scattering particles and a binder provided on the scintillator layer, wherein the protective film is made of a thermoplastic resin having a softening point not higher than the film formation temperature of the scintillator layer and extending on the array substrate over an area of the reflective layer.Type: ApplicationFiled: April 27, 2012Publication date: October 25, 2012Applicants: TOSHIBA ELECTRON TUBES & DEVICES CO., LTD., KABUSHIKI KAISHA TOSHIBAInventors: Yuichi SHINBA, Katsuhisa HOMMA
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Patent number: 8158949Abstract: A radiation detector characterized by includes a photoelectric conversion element, a scintillation layer which converts radioactive rays to fluorescence, the scintillation layer being formed on the photoelectric conversion element, and a reflective film formed on the scintillation layer, the reflective film containing light-scattering particles for reflecting the fluorescence from the scintillation layer and a binder material binding the light-scattering particles, and having depletion portions without being filled with the binder material, the depletion portions being formed in a periphery of the light-scattering particles.Type: GrantFiled: January 25, 2010Date of Patent: April 17, 2012Assignee: Toshiba Electron Tubes & Devices Co., Ltd.Inventors: Katsuhisa Homma, Shinetsu Fujieda
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Patent number: 7982190Abstract: According to one embodiment, a radiation detector includes, a substrate, a scintillator layer, a moistureproof body, and an adhesion layer. The substrate comprises a photoelectric conversion element. The scintillator layer is formed on the substrate and converts radiation into fluorescence. The moistureproof body comprises a flange portion in a periphery thereof, the moistureproof body being deep enough to contain at least the scintillator layer. The adhesion layer causes the substrate and the flange portion of the moistureproof body to adhere to each other in a sealed manner.Type: GrantFiled: May 18, 2010Date of Patent: July 19, 2011Assignee: Toshiba Electron Tubes & Devices Co., Ltd.Inventors: Katsuhisa Homma, Hitoshi Chiyoma, Shinetsu Fujieda, Keiko Sakai, Masakuni Ikagawa, Akiko Suzuki
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Publication number: 20110114847Abstract: Provided is a composition for reflective film comprising a polyvinyl acetal resin, an epoxidized vegetable oil, a solvent, a coupling agent and titanium oxide.Type: ApplicationFiled: July 13, 2009Publication date: May 19, 2011Applicant: Toshiba Electron Tubes & Devices Co., Ltd.Inventors: Shinetsu Fujieda, Katsuhisa Homma, Akiko Suzuki, Tatsuoki Kono
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Publication number: 20100224784Abstract: According to one embodiment, a radiation detector includes, a substrate, a scintillator layer, a moistureproof body, and an adhesion layer. The substrate comprises a photoelectric conversion element. The scintillator layer is formed on the substrate and converts radiation into fluorescence. The moistureproof body comprises a flange portion in a periphery thereof, the moistureproof body being deep enough to contain at least the scintillator layer. The adhesion layer causes the substrate and the flange portion of the moistureproof body to adhere to each other in a sealed manner.Type: ApplicationFiled: May 18, 2010Publication date: September 9, 2010Applicant: Toshiba Electron Tubes & Devices Co., Ltd.Inventors: Katsuhisa Homma, Hitoshi Chiyoma, Shinetsu Fujieda, Keiko Sakai, Masakuni Ikagawa, Akiko Suzuki
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Publication number: 20100116997Abstract: A radiation detector characterized by includes a photoelectric conversion element, a scintillation layer which converts radioactive rays to fluorescence, the scintillation layer being formed on the photoelectric conversion element, and a reflective film formed on the scintillation layer, the reflective film containing light-scattering particles for reflecting the fluorescence from the scintillation layer and a binder material binding the light-scattering particles, and having depletion portions without being filled with the binder material, the depletion portions being formed in a periphery of the light-scattering particles.Type: ApplicationFiled: January 25, 2010Publication date: May 13, 2010Applicant: Toshiba Electron Tubes & Devices Co., Ltd.Inventors: Katsuhisa Homma, Shinetsu Fujieda
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Publication number: 20090084961Abstract: A radiation detector includes an electrode substrate having plural photoelectric transfer elements which convert visible light into electrical signals, a scintillator layer formed on the electrode substrate and converting radial rays into visible light, and a protective film includes a drying agent film and a moisture-proof film. The drying agent film is formed on at least the scintillator layer. The moisture-proof film is formed on the drying agent film.Type: ApplicationFiled: September 24, 2008Publication date: April 2, 2009Inventors: Junichi TONOTANI, Masatoshi HIGUCHI, Keiko SAKAI, Katsuhisa HOMMA, Atsuya YOSHIDA
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Patent number: 7276706Abstract: A radiation detector comprises pixel electrodes which collect charges, a photoelectric converting layer which is provided on the pixel electrodes and which converts incident radiation into the charges, and which contains at least one or more kinds of heavy metal halide (ABn:A=heavy metal, B=halogen, n=either one of 1, 2, and 3) and at least one or more kinds of halogen (B2) respectively, and an electrode layer which is provided on the photoelectric converting layer opposite to the pixel electrodes.Type: GrantFiled: November 9, 2006Date of Patent: October 2, 2007Assignees: Kabushiki Kaisha Toshiba, Toshiba Electron Tubes & Devices Co., Ltd.Inventors: Yoshiko Mikoshiba, Hiroshi Aida, Yasuaki Kawasaki, Hiroshi Onihashi, Katsuhisa Homma
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Publication number: 20070051895Abstract: A radiation detector comprises pixel electrodes which collect charges, a photoelectric converting layer which is provided on the pixel electrodes and which converts incident radiation into the charges, and which contains at least one or more kinds of heavy metal halide (ABn:A=heavy metal, B=halogen, n=either one of 1, 2, and 3) and at least one or more kinds of halogen (B2) respectively, and an electrode layer which is provided on the photoelectric converting layer opposite to the pixel electrodes.Type: ApplicationFiled: November 9, 2006Publication date: March 8, 2007Applicants: KABUSHIKI KAISHA TOSHIBA, Toshiba Electron Tubes & Devices Co., Ltd.Inventors: Yoshiko Mikoshiba, Hiroshi Aida, Yasuaki Kawasaki, Hiroshi Onihashi, Katsuhisa Homma
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Patent number: 7053380Abstract: An X-ray detector comprising a scintillator layer (38) provided for each pixel and adapted for converting X radiation into light, a storage capacitor (15) for storing, as electric charge, the light converted in the scintillator layer (38), and a partition layer (39) partitioning the adjoining scintillator layers (38) provided to the respective pixels. The scintillator layer (38) contains a fluorescent material (I), the partition layer contains a second phosphor (P2) having optical characteristics different from those of the fluorescent material (IP1). The wavelength of the fluorescent light emitted from the second phosphor (P2) includes a component which is equal to or longer than the shortest wavelength of the fluorescent light emitted from the fluorescent material (IP1).Type: GrantFiled: February 10, 2003Date of Patent: May 30, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Katsuhisa Homma, Hiroshi Aida, Kenichi Ito, Akiko Fujisawa, Hiroshi Onihashi