Patents by Inventor Hiromichi Ohashi
Hiromichi Ohashi 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).
-
Patent number: 9570436Abstract: The present invention provides a semiconductor device that prevents destruction due to an avalanche breakdown and that has a high tolerance against breakdown by configuring the device so as to have a punch-through breakdown function therein and such that the breakdown voltage of a punch-through breakdown is lower than an avalanche breakdown voltage so that an avalanche breakdown does not occur.Type: GrantFiled: June 5, 2013Date of Patent: February 14, 2017Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGYInventors: Akira Nakajima, Shinichi Nishizawa, Hiromichi Ohashi
-
Publication number: 20150249403Abstract: [Solution] An actually used flying capacitor-type multilevel power conversion circuit has variations in the characteristics of main semiconductor switches, and includes parasitic elements such as parasitic resistance, parasitic capacity, and parasitic inductance in the circuit, which causes flying capacitors to be charged and discharged to different quantities contrary to ideal case, making it necessary to have voltage sensors for flying capacitor voltage detection and a main semiconductor switch control mechanism in order to suppress fluctuation of the flying capacitor voltages from prescribed values. Furthermore, this circuit becomes unpractical when the number of levels is increased.Type: ApplicationFiled: September 9, 2013Publication date: September 3, 2015Inventors: Yukihiko Sato, Hidemine Obara, Hiromichi Ohashi, Akira Nakajima, Shinichi Nishizawa
-
Publication number: 20150155273Abstract: The present invention provides a semiconductor device that prevents destruction due to an avalanche breakdown and that has a high tolerance against breakdown by configuring the device so as to have a punch-through breakdown function therein and such that the breakdown voltage of a punch-through breakdown is lower than an avalanche breakdown voltage so that an avalanche breakdown does not occur.Type: ApplicationFiled: June 5, 2013Publication date: June 4, 2015Applicant: National Institute of Advanced Industrial Science and TechnologyInventors: Akira Nakajima, Shinichi Nishizawa, Hiromichi Ohashi
-
Patent number: 8363441Abstract: To realize power supply to each gate drive circuit without using an individual dedicated power supply for each gate drive circuit. A power conversion apparatus includes an individual drive unit that does not require a dedicated power supply, and includes gate drivers connected to switches and interface circuits and a power converter gate drive configured with a common power supply for supplying power to the gate drive unit. Power is supplied from main circuits or a number of common power supplies fewer than that of the number of the switches through one or more power supply terminals included in the interface circuit. Also, the signal can be transmitted by isolation from a signal source to the gate drivers.Type: GrantFiled: January 23, 2009Date of Patent: January 29, 2013Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Hiromichi Ohashi, Yukihiko Sato, Kyungmin Sung, Masamu Kamaga, Moe Imaizumi
-
Patent number: 8351224Abstract: A power conversion apparatus includes a main circuit with switches, and performs power conversion to generate power to a three-phase AC load from a three- or single-phase AC power supply. Some of the switches are configured, using a bidirectional switch including a normally-on device that is turned OFF when a gate circuit is provided with a positive or negative voltage, and a normally-off device that is turned ON when the gate circuit is provided with a positive or negative voltage, to provide only a specific unidirectional current flow when the gate circuit is not activated, and when the gate circuit is activated, provide and control a bidirectional current flow to direct only in an arbitrary unidirectional way. By providing the power conversion apparatus with a capability of directing back, to a load (motor), any power coming therefrom, the conversion apparatus requires no direct-current link capacitor and a diode clamping circuit.Type: GrantFiled: July 21, 2009Date of Patent: January 8, 2013Assignee: National Institute of Advanced Industrial Science and TechnologyInventors: Hiromichi Ohashi, Kyungmin Sung, Masamu Kamaga, Mitsuaki Shimizu
-
Patent number: 8149376Abstract: The test data processing apparatus of the present invention is a test data processing apparatus for processing test data obtained by testing defects of a sheet-shaped product having at least an optical film which is a member of an optical displaying apparatus, comprising a defect information preparing section, wherein, on the basis of surface defect test data relating to a surface defect and bright point test data relating to a bright point obtained when the optical film or a laminate body containing the optical film is regarded as an object of testing, in a case that a position of the surface defect and a position of the bright point are identical, the surface defect and the bright point located at the identical position are not regarded as a defect for processing by the defect information preparing section.Type: GrantFiled: October 10, 2007Date of Patent: April 3, 2012Assignee: Nitto Denko CorporationInventor: Hiromichi Ohashi
-
Patent number: 8078307Abstract: A defect testing apparatus for testing defects of optical film sheet-shaped product of an optical displaying apparatus, which includes a defect detecting means for detecting defects of a monolayer body and/or a laminate body constituting the sheet-shaped product in a state in which a protective layer on a surface of the sheet-shaped product is not disposed and defect information preparing means for preparing defect information which is information related to the defects detected by the defect detecting means, and the defect information is used for producing the sheet-shaped product provided in a roll form or in separate sheets.Type: GrantFiled: November 10, 2010Date of Patent: December 13, 2011Assignee: Nitto Denko CorporationInventor: Hiromichi Ohashi
-
Patent number: 8045151Abstract: A first inspection process of inspecting presence of a defect on a front surface of a film body with a protective film separated therefrom; a separator removing process of separating a separator from the inspected laminated film; a second inspection process of inspecting presence of the defect in the film body in a vertical attitude while introducing the film body with the separator separated and removed therefrom to a film travel path directed in a vertical direction, and storing detection data; a separator laminating process and a protective film laminating process of laminating a separator and a protective film to a back surface and a front surface of the inspected film body, respectively; and a film collecting process of winding up the inspected laminated film laminated with the protective film and the separator are provided.Type: GrantFiled: August 12, 2008Date of Patent: October 25, 2011Assignee: Nitto Denko CorporationInventors: Hiromichi Ohashi, Kosuke Sato
-
Patent number: 7922843Abstract: A strip-shaped polarizing film has a protective film strip conformably adhered to one surface thereof and a releasable liner conformably adhered to the other surface thereof and delivered from a film delivering station 1. After an appearance inspection, a lamination of the protective film strip and the polarizing film strip F is half-cut using a laser unit 11 to form an array of laminations each consisting of a protective film and a polarizing film F, with the releasable liner being left intact. Then, the polarizing films F are fed to a peeling mechanism 4. The peeling mechanism 4 feeds a forwardmost one the polarizing films F to a laminating mechanism 5 while peeling off the releasable liner therefrom by a knife-edged member. The forwardmost polarizing film F is laminated to a liquid-crystal panel W conveyed to the laminating mechanism by a panel transport apparatus 18 in synchronization of the feeding of the forwardmost polarizing film F.Type: GrantFiled: April 13, 2009Date of Patent: April 12, 2011Assignee: Nitto Denko CorporationInventors: Kazuo Kitada, Yoshihiro Kameda, Kanji Nishida, Tomokazu Yura, Takaichi Amano, Hiromichi Ohashi, Atsushi Hino, Naoyuki Matsuo
-
Patent number: 7913734Abstract: A strip-shaped polarizing film has a protective film strip conformably adhered to one surface thereof and a releasable liner conformably adhered to the other surface thereof and delivered from a film delivering station 1. After an appearance inspection, a lamination of the protective film strip and the polarizing film strip F is half-cut using a laser unit 11 to form an array of laminations each consisting of a protective film and a polarizing film F, with the releasable liner being left intact. Then, the polarizing films F are fed to a peeling mechanism 4. The peeling mechanism 4 feeds a forwardmost one the polarizing films F to a laminating mechanism 5 while peeling off the releasable liner therefrom by a knife-edged member. The forwardmost polarizing film F is laminated to a liquid-crystal panel W conveyed to the laminating mechanism by a panel transport apparatus 18 in synchronization of the feeding of the forwardmost polarizing film F.Type: GrantFiled: July 26, 2010Date of Patent: March 29, 2011Assignee: Nitto Denko CorporationInventors: Kazuo Kitada, Yoshihiro Kameda, Kanji Nishida, Tomokazu Yura, Takaichi Amano, Hiromichi Ohashi, Atsushi Hino, Naoyuki Matsuo
-
Patent number: 7908026Abstract: A defect testing apparatus for testing defects of optical film sheet-shaped product of an optical displaying apparatus, which includes a defect detecting means for detecting defects of a monolayer body and/or a laminate body constituting the sheet-shaped product in a state in which a protective layer on a surface of the sheet-shaped product is not disposed and defect information preparing means for preparing defect information which is information related to the defects detected by the defect detecting means, and the defect information is used for producing the sheet-shaped product provided in a roll form or in separate sheets.Type: GrantFiled: October 10, 2007Date of Patent: March 15, 2011Assignee: NITTO DENKO CORPORATIONInventor: Hiromichi Ohashi
-
Publication number: 20110056357Abstract: A defect testing apparatus for testing defects of optical film sheet-shaped product of an optical displaying apparatus, which includes a defect detecting means for detecting defects of a monolayer body and/or a laminate body constituting the sheet-shaped product in a state in which a protective layer on a surface of the sheet-shaped product is not disposed and defect information preparing means for preparing defect information which is information related to the defects detected by the defect detecting means, and the defect information is used for producing the sheet-shaped product provided in a roll form or in separate sheets.Type: ApplicationFiled: November 10, 2010Publication date: March 10, 2011Applicant: NITTO DENKO CORPORATIONInventor: Hiromichi Ohashi
-
Publication number: 20100288441Abstract: [Objects] To make it possible to carry out automatically and accurately a laminating operation of an optical element to a sheet-shaped body. [Means for Accomplishing the Objects] A strip-shaped polarizing film has a protective film strip conformably adhered to one surface thereof and a releasable liner conformably adhered to the other surface thereof and delivered from a film delivering station 1. After an appearance inspection, a lamination of the protective film strip and the polarizing film strip F is half-cut using a laser unit 11 to form an array of laminations each consisting of a protective film and a polarizing film F, with the releasable liner being left intact. Then, the polarizing films F are fed to a peeling mechanism 4. The peeling mechanism 4 feeds a forwardmost one the polarizing films F to a laminating mechanism 5 while peeling off the releasable liner therefrom by a knife-edged member.Type: ApplicationFiled: July 26, 2010Publication date: November 18, 2010Applicant: NITTO DENKO CORPORATIONInventors: Kazuo KITADA, Yoshihiro KAMEDA, Kanji NISHIDA, Tomokazu YURA, Takaichi AMANO, Hiromichi OHASHI, Atsushi HINO, Naoyuki MATSUO
-
Publication number: 20100165333Abstract: A first inspection process of inspecting presence of a defect on a front surface of a film body with a protective film separated therefrom; a separator removing process of separating a separator from the inspected laminated film; a second inspection process of inspecting presence of the defect in the film body in a vertical attitude while introducing the film body with the separator separated and removed therefrom to a film travel path directed in a vertical direction, and storing detection data; a separator laminating process and a protective film laminating process of laminating a separator and a protective film to a back surface and a front surface of the inspected film body, respectively; and a film collecting process of winding up the inspected laminated film laminated with the protective film and the separator are provided.Type: ApplicationFiled: August 12, 2008Publication date: July 1, 2010Inventors: Hiromichi Ohashi, Kosuke Sato
-
Publication number: 20100067264Abstract: Provided is a power conversion apparatus in which a main circuit is provided with a plurality of switches, and power conversion is performed to generate power for supply to a three-phase AC load from a three- or single-phase AC power supply. At least some of the plurality of switches are configured, using a bidirectional switch including a normally-on device that is turned OFF when a gate circuit is provided with either a positive or negative voltage, and a normally-off device that is turned ON when the gate circuit is provided with either a positive or negative voltage, to provide only a specific unidirectional current flow when the gate circuit is not activated, and when the gate circuit is activated, provide a bidirectional current flow and control the current flow to direct only in an arbitrary unidirectional way.Type: ApplicationFiled: July 21, 2009Publication date: March 18, 2010Inventors: Hiromichi OHASHI, Kyungmin Sung, Masamu Kamaga, Mitsuaki Shimizu
-
Publication number: 20090199950Abstract: [Objects] To make it possible to carry out automatically and accurately a laminating operation of an optical element to a sheet-shaped body. [Means for Accomplishing the Objects] A strip-shaped polarizing film has a protective film strip conformably adhered to one surface thereof and a releasable liner conformably adhered to the other surface thereof and delivered from a film delivering station 1. After an appearance inspection, a lamination of the protective film strip and the polarizing film strip F is half-cut using a laser unit 11 to form an array of laminations each consisting of a protective film and a polarizing film F, with the releasable liner being left intact. Then, the polarizing films F are fed to a peeling mechanism 4. The peeling mechanism 4 feeds a forwardmost one the polarizing films F to a laminating mechanism 5 while peeling off the releasable liner therefrom by a knife-edged member.Type: ApplicationFiled: April 13, 2009Publication date: August 13, 2009Applicant: NITTO DENKO CORPORATIONInventors: Kazuo KITADA, Yoshihiro KAMEDA, Kanji NISHIDA, Tomokazu YURA, Takaichi AMANO, Hiromichi OHASHI, Atsushi HINO, Naoyuki MATSUO
-
Publication number: 20090195068Abstract: To realize power supply to each gate drive circuit without using an individual dedicated power supply for each gate drive circuit. A power conversion apparatus includes an individual drive unit that does not require a dedicated power supply, and includes gate drivers connected to switches and interface circuits and a power converter gate drive configured with a common power supply for supplying power to the gate drive unit. Power is supplied from main circuits or a number of common power supplies fewer than that of the number of the switches through one or more power supply terminals included in the interface circuit. Also, the signal can be transmitted by isolation from a signal source to the gate drivers.Type: ApplicationFiled: January 23, 2009Publication date: August 6, 2009Inventors: Hiromichi Ohashi, Yukihiko Sato, Kyungmin Sung, Masamu Kamaga, Moe Imaizumi
-
Patent number: 7531871Abstract: A semiconductor element of this invention includes a drift layer of a first conductivity type formed on a semiconductor substrate of the first conductivity type, a well layer of a second conductivity type selectively formed in the surface of the drift layer, a source layer of the first conductivity type selectively formed in the surface of the well layer, a trench formed to reach at least the inside of the drift layer from the surface of the source layer through the well layer, a buried electrode formed in the trench through a first insulating film, and a control electrode formed on the drift layer, the well layer, and the source layer through a second insulating film.Type: GrantFiled: December 5, 2005Date of Patent: May 12, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Ichiro Omura, Wataru Saito, Tsuneo Ogura, Hiromichi Ohashi, Yoshihiko Saito, Kenichi Tokano
-
Publication number: 20080087149Abstract: A defect testing apparatus according to the present invention is a defect testing apparatus for testing defects of a sheet-shaped product having at least an optical film which is a member of an optical displaying apparatus, including: defect detecting means for detecting defects of a monolayer body and/or a laminate body constituting the sheet-shaped product in a state in which a protective layer on a surface of the sheet-shaped product is not disposed; and defect information preparing means for preparing defect information which is information related to the defects detected by said defect detecting means, wherein said defect information is used for producing the sheet-shaped product provided in a roll form or in separate sheets.Type: ApplicationFiled: October 10, 2007Publication date: April 17, 2008Applicant: NITTO DENKO CORPORATIONInventor: Hiromichi Ohashi
-
Publication number: 20080088790Abstract: The test data processing apparatus of the present invention is a test data processing apparatus for processing test data obtained by testing defects of a sheet-shaped product having at least an optical film which is a member of an optical displaying apparatus, comprising a defect information preparing section, wherein, on the basis of surface defect test data relating to a surface defect and bright point test data relating to a bright point obtained when the optical film or a laminate body containing the optical film is regarded as an object of testing, in a case that a position of the surface defect and a position of the bright point are identical, the surface defect and the bright point located at the identical position are not regarded as a defect for processing by the defect information preparing section.Type: ApplicationFiled: October 10, 2007Publication date: April 17, 2008Applicant: NITTO DENKO CORPORATIONInventor: Hiromichi Ohashi