Patents by Inventor Isao Fujiwara
Isao Fujiwara 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: 20240139569Abstract: A fire detection apparatus 1A includes a heat detection unit 110A provided such that a part of the heat detection unit 110A is accommodated in an outer cover 20A and another part of the heat detection unit 110A is exposed to an outside of the fire detection apparatus 1A through an insertion hole 120A formed in a top surface portion 22A, and a guard portion 130A which is provided to cover a periphery of the insertion hole 120A and another part of the heat detection unit 110A in the top surface portion 22A and has a plurality of ribs, in which a material of a rib corresponding to a first guard side rib 131A among the plurality of ribs is made different from a material of some other ribs, or a shape of the first guard side rib 131A among the plurality of ribs is made different from a shape of some other ribs.Type: ApplicationFiled: January 2, 2024Publication date: May 2, 2024Inventors: Yasuharu Fujiwara, Isao Saeki, Hideki Takano
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Publication number: 20240139570Abstract: A fire detection apparatus 1A includes a heat detection unit 110A provided such that a part of the heat detection unit 110A is accommodated in an outer cover 20A and another part of the heat detection unit 110A is exposed to an outside of the fire detection apparatus 1A through an insertion hole 120A formed in a top surface portion 22A, and a guard portion 130A which is provided to cover a periphery of the insertion hole 120A and another part of the heat detection unit 110A in the top surface portion 22A and has a plurality of ribs, in which a material of a rib corresponding to a first guard side rib 131A among the plurality of ribs is made different from a material of some other ribs, or a shape of the first guard side rib 131A among the plurality of ribs is made different from a shape of some other ribs.Type: ApplicationFiled: January 3, 2024Publication date: May 2, 2024Inventors: Yasuharu Fujiwara, Isao Saeki, Hideki Takano
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Patent number: 11909342Abstract: Two inverters (10) provided at respective both ends of open-end windings (8) are appropriately controlled. As control regions (R) of a rotating electrical machine (80), a first speed region (VR1) and a second speed region (VR2) in which the rotational speed of the rotating electrical machine (80) is higher than in the first speed region (VR1) for the same torque are set, and in the second speed region (VR2), a rotating electrical machine control device (1) controls both inverters (10), a first inverter (11) and a second inverter (12), by mixed pulse width modulation control in which control is performed such that a plurality of pulses with different patterns are outputted during a first period (T1) which is a half cycle of electrical angle, and an inactive state continues during a second period (T2) which is the other half cycle.Type: GrantFiled: September 29, 2020Date of Patent: February 20, 2024Assignees: AISIN CORPORATION, NAGOYA INSTITUTE OF TECHNOLOGYInventors: Subrata Saha, Hiroki Iwai, Takashi Kosaka, Hiroaki Matsumori, Naoto Saito, Yoshinobu Ito, Isao Fujiwara
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Patent number: 11885995Abstract: Provided is a low-cost image display apparatus that has asymmetry in the display characteristics in the right-to-left direction, displays a clear image to the driver, exhibits an appropriate viewing angle control function that reduces reflected glare on the window glass, and is thinly made while causing no moire, and there are also provided an information display system for a vehicle, and an optical film.Type: GrantFiled: June 24, 2022Date of Patent: January 30, 2024Assignee: FUJIFILM CorporationInventors: Shinichi Yoshinari, Isao Fujiwara
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Patent number: 11886079Abstract: The wavelength conversion member includes a wavelength conversion layer containing quantum dots, in which the wavelength conversion layer is provided between two substrates, at least one of the two substrates has a barrier layer, the wavelength conversion member has a total thickness of 120 ?m or less, the wavelength conversion member has a rub resistance of 100 g or more, and the wavelength conversion member exhibits a bend resistance of a mandrel diameter of 4 mm or less in a bend resistance test carried out according to a cylindrical mandrel method specified in JIS K 5600-5-1:1999.Type: GrantFiled: December 9, 2022Date of Patent: January 30, 2024Assignee: FUJIFILM CorporationInventors: Tatsuya Oba, Isao Fujiwara, Shinji Hikita
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Patent number: 11862405Abstract: An element body is formed with a through hole to be open at a first main surface and a second main surface opposing each other. A through-conductor includes a first portion located inside the through hole and a second portion protruding from the second main surface. A case surrounds the element body and is electrically insulating. A cover surrounds the second portion and is electrically insulating. A first resin is contained in the case and coats the element body. A second resin is contained in the cover and is located in a space between an inner surface of the element body and the first portion. The second resin has an electrical resistivity less than an electrical resistivity of the first resin.Type: GrantFiled: December 15, 2022Date of Patent: January 2, 2024Assignee: TDK CORPORATIONInventors: Yuta Kamo, Kenichi Kamehashi, Hisashi Tanaka, Isao Fujiwara
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Publication number: 20230260714Abstract: An element body is formed with a through hole to be open at a first main surface and a second main surface opposing each other. A through-conductor includes a first portion located inside the through hole and a second portion protruding from the second main surface. A case surrounds the element body and is electrically insulating. A cover surrounds the second portion and is electrically insulating. A first resin is contained in the case and coats the element body. A second resin is contained in the cover and is located in a space between an inner surface of the element body and the first portion. The second resin has an electrical resistivity less than an electrical resistivity of the first resin.Type: ApplicationFiled: December 15, 2022Publication date: August 17, 2023Applicant: TDK CORPORATIONInventors: Yuta KAMO, Kenichi KAMEHASHI, Hisashi TANAKA, Isao FUJIWARA
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Patent number: 11705850Abstract: A rotating electrical machine control system that controls an alternating-current rotating electrical machine having two coil sets of an N phase arranged on the same stator core includes a first inverter, a second inverter, and an inverter control device that individually controls the two inverters such that currents of different phases flow through the two coil sets. The inverter control device stops the second inverter and performs switching control of the first inverter to convert electric power between a direct current and an alternating current of an N phase, or performs switching control of the two inverters to convert electric power between a direct current and alternating currents of 2N phases. Switching devices included in the first inverter have a shorter transition time between an off state and an on state and smaller switching loss than switching devices included in the second inverter.Type: GrantFiled: June 17, 2020Date of Patent: July 18, 2023Assignee: AISIN CORPORATIONInventors: Subrata Saha, Isao Fujiwara
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Publication number: 20230152629Abstract: The wavelength conversion member includes a wavelength conversion layer containing quantum dots, in which the wavelength conversion layer is provided between two substrates, at least one of the two substrates has a barrier layer, the wavelength conversion member has a total thickness of 120 µm or less, the wavelength conversion member has a rub resistance of 100 g or more, and the wavelength conversion member exhibits a bend resistance of a mandrel diameter of 4 mm or less in a bend resistance test carried out according to a cylindrical mandrel method specified in JIS K 5600-5-1:1999.Type: ApplicationFiled: December 9, 2022Publication date: May 18, 2023Applicant: FUJIFILM CorporationInventors: Tatsuya OBA, Isao FUJIWARA, Shinji HIKITA
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Publication number: 20230028358Abstract: Two inverters (10) provided at respective both ends of open-end windings (8) are appropriately controlled. As control regions (R) of a rotating electrical machine (80), a first speed region (VR1) and a second speed region (VR2) in which the rotational speed of the rotating electrical machine (80) is higher than in the first speed region (VR1) for the same torque are set, and in the second speed region (VR2), a rotating electrical machine control device (1) controls both inverters (10), a first inverter (11) and a second inverter (12), by mixed pulse width modulation control in which control is performed such that a plurality of pulses with different patterns are outputted during a first period (T1) which is a half cycle of electrical angle, and an inactive state continues during a second period (T2) which is the other half cycle.Type: ApplicationFiled: September 29, 2020Publication date: January 26, 2023Applicants: AISIN CORPORATION, NAGOYA INSTITUTE OF TECHNOLOGYInventors: Subrata SAHA, Hiroki IWAI, Takashi KOSAKA, Hiroak MATSUMORI, Naoto SAITO, Yoshinobu ITO, Isao FUJIWARA
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Publication number: 20220326424Abstract: Provided is a low-cost image display apparatus that has asymmetry in the display characteristics in the right-to-left direction, displays a clear image to the driver, exhibits an appropriate viewing angle control function that reduces reflected glare on the window glass, and is thinly made While causing no moire, and there are also provided an information display system for a vehicle, and an optical film.Type: ApplicationFiled: June 24, 2022Publication date: October 13, 2022Applicant: FUJIFILM CorporationInventors: Shinichi YOSHINARI, Isao FUJIWARA
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Patent number: 11456686Abstract: Two inverters provided at respective both ends of open-end windings are appropriately controlled. A rotating electrical machine control device (1) that can control a first inverter (11) and a second inverter (12) by a plurality of control schemes, respectively, the control schemes differing from each other in at least one of a switching pattern and a switching frequency and being independent of each other, has a control mode in which the first inverter (11) and the second inverter (12) are controlled by the same control scheme in a first speed region (VR1) in which the rotational speed of a rotating electrical machine (80), and the first inverter (11) and the second inverter (12) are controlled by different control schemes in a second speed region (VR2) in which the rotational speed of the rotating electrical machine (80) is higher than in the first speed region (VR1).Type: GrantFiled: August 30, 2019Date of Patent: September 27, 2022Assignee: AISIN CORPORATIONInventors: Subrata Saha, Isao Fujiwara
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Publication number: 20220200508Abstract: A rotating electrical machine control system that controls an alternating-current rotating electrical machine having two coil sets of an N phase arranged on the same stator core includes a first inverter, a second inverter, and an inverter control device that individually controls the two inverters such that currents of different phases flow through the two coil sets. The inverter control device stops the second inverter and performs switching control of the first inverter to convert electric power between a direct current and an alternating current of an N phase, or performs switching control of the two inverters to convert electric power between a direct current and alternating currents of 2N phases. Switching devices included in the first inverter have a shorter transition time between an off state and an on state and smaller switching loss than switching devices included in the second inverter.Type: ApplicationFiled: June 17, 2020Publication date: June 23, 2022Applicant: AISIN CORPORATIONInventors: Subrata SAHA, Isao FUJIWARA
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Patent number: 11316235Abstract: An electrode body including positive electrode plate and negative electrode plate includes a positive electrode tab portion at an end portion on the sealing plate side. The positive electrode plate is electrically connected to a positive electrode collector including a collector body portion and a collector connection. A pressure-sensitive current breaking mechanism includes a conductive member including an opening portion on an electrode body side, a deformation plate that seals the opening portion, and a collector body portion that is disposed on the electrode body side of the deformation plate and that is connected to the deformation plate. The collector connection is disposed between the current breaking mechanism and one of the large-area side walls of the prismatic outer package, and the positive electrode tab portion is connected to the collector connection.Type: GrantFiled: May 12, 2016Date of Patent: April 26, 2022Assignees: SANYO Electric Co., Ltd., Panasonic CorporationInventors: Ryoichi Wakimoto, Kazuhiro Kitaoka, Isao Fujiwara, Hiromasa Yagi
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Patent number: 11258391Abstract: Two inverters provided at both ends of each open-end winding, respectively, are appropriately controlled. A rotating electrical machine control device (1) that has at least two control schemes among pulse width modulation control, active short-circuit control, and rectangular-wave control, as control schemes for a first inverter (11) and a second inverter (12), and that can control the first inverter (11) and the second inverter (12) by control schemes which are independent of each other considers one of the plurality of control schemes as a first control scheme and one of the plurality of control schemes different than the first control scheme as a second control scheme, and has a control mode in which the first inverter (11) is controlled by the first control scheme and the second inverter (12) is controlled by the second control scheme.Type: GrantFiled: January 17, 2019Date of Patent: February 22, 2022Assignee: AISIN AW CO., LTD.Inventors: Subrata Saha, Isao Fujiwara
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Patent number: 11121439Abstract: A secondary battery includes a case composed of a metal containing aluminum as a main component, a stacked electrode assembly arranged in the case, a negative electrode current collector electrically connecting negative electrodes of the stacked electrode assembly to a negative electrode terminal, a positive electrode current collector electrically connecting positive electrodes of the stacked electrode assembly to a positive electrode terminal, a first metal plate arranged between the case and the stacked electrode assembly, and a spacer arranged between the case and the first metal plate, the spacer being composed of an insulating material. The positive electrodes are electrically connected to the case or a second metal plate arranged on the first metal plate with an insulating member provided between the first metal plate and the insulating member.Type: GrantFiled: November 29, 2016Date of Patent: September 14, 2021Assignee: PANASONIC CORPORATIONInventors: Kozo Watanabe, Isao Fujiwara, Kaori Ishikawa
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Patent number: 11056984Abstract: An inverter control device that controls an inverter connected to a direct-current power supply and connected to an alternating-current rotating electrical machine to convert electric power between direct current and alternating current of a plurality of phases, the inverter control device including an electronic control unit that is configured to perform, in a state in which one switching element of a plurality of switching elements included in the inverter has a turn-off failure in which the switching element always goes into an off state, torque reduction control for reducing torque of the rotating electrical machine or deceleration control for outputting torque in a reverse direction from a rotation direction of the rotating electrical machine by performing switching control of the plurality of switching elements.Type: GrantFiled: September 28, 2018Date of Patent: July 6, 2021Assignee: AISIN AW CO., LTD.Inventors: Masashi Miyazaki, Subrata Saha, Isao Fujiwara, Yuki Sugiyama
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Publication number: 20210167702Abstract: Two inverters provided at respective both ends of open-end windings are appropriately controlled. A rotating electrical machine control device (1) that can control a first inverter (11) and a second inverter (12) by a plurality of control schemes, respectively, the control schemes differing from each other in at least one of a switching pattern and a switching frequency and being independent of each other, has a control mode in which the first inverter (11) and the second inverter (12) are controlled by the same control scheme in a first speed region (VR1) in which the rotational speed of a rotating electrical machine (80), and the first inverter (11) and the second inverter (12) are controlled by different control schemes in a second speed region (VR2) in which the rotational speed of the rotating electrical machine (80) is higher than in the first speed region (VR1).Type: ApplicationFiled: August 30, 2019Publication date: June 3, 2021Applicant: AISIN AW CO., LTD.Inventors: Subrata SAHA, Isao FUJIWARA
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Publication number: 20200389115Abstract: Two inverters provided at both ends of each open-end winding, respectively, are appropriately controlled. A rotating electrical machine control device (1) that has at least two control schemes among pulse width modulation control, active short-circuit control, and rectangular-wave control, as control schemes for a first inverter (11) and a second inverter (12), and that can control the first inverter (11) and the second inverter (12) by control schemes which are independent of each other considers one of the plurality of control schemes as a first control scheme and one of the plurality of control schemes different than the first control scheme as a second control scheme, and has a control mode in which the first inverter (11) is controlled by the first control scheme and the second inverter (12) is controlled by the second control scheme.Type: ApplicationFiled: January 17, 2019Publication date: December 10, 2020Applicant: AISIN AW CO.,LTD.Inventors: Subrata SAHA, Isao FUJIWARA
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Publication number: 20200220479Abstract: An inverter control device that controls an inverter connected to a direct-current power supply and connected to an alternating-current rotating electrical machine to convert electric power between direct current and alternating current of a plurality of phases, the inverter control device including an electronic control unit that is configured to perform, in a state in which one switching element of a plurality of switching elements included in the inverter has a turn-off failure in which the switching element always goes into an off state, torque reduction control for reducing torque of the rotating electrical machine or deceleration control for outputting torque in a reverse direction from a rotation direction of the rotating electrical machine by performing switching control of the plurality of switching elements.Type: ApplicationFiled: September 28, 2018Publication date: July 9, 2020Applicant: AISIN AW CO., LTD.Inventors: Masashi MIYAZAKI, Subrata SAHA, Isao FUJIWARA, Yuki SUGIYAMA