Patents by Inventor Jun Kitagawa

Jun Kitagawa 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).

  • Publication number: 20240198453
    Abstract: The purpose is to smooth a surface of a molten portion, to suppress formation of a sharp edge and an undercut at an end of the molten portion and in the vicinity of the end. A laser welding method includes emitting a laser beam onto a surface of a stack of a plurality of workpieces, and moving the laser beam in a predetermined traveling direction, thereby welding the plurality of workpieces to each other. The laser beam includes a main beam, a sub beam, a rear beam, and an end beam. The main beam is emitted onto a main region. The sub beam is emitted onto a sub region surrounding the main region. The rear beam is emitted onto a rear region located rearward of the main region. The end beam is emitted onto an end region located rearward of the rear region and outside of the sub region.
    Type: Application
    Filed: December 5, 2023
    Publication date: June 20, 2024
    Inventors: Jun KITAGAWA, Shimpei TAKAHARA, Koji FUKUOKA, Mitsutaka IGAUE
  • Patent number: 12012663
    Abstract: A carbon dioxide electrolysis device, includes: an anode configured to oxidize water or a hydroxide ion and thus generate oxygen; an anode solution flow path configured to supply an anode solution to the anode; a cathode configured to reduce carbon dioxide to generate a carbon compound; a gas flow path configured to supply a gas to the cathode, the gas containing carbon dioxide; a diaphragm provided between the anode and the cathode and including a porous film with a hydrophilic polymer supported thereon; and a protective member provided between the anode and the diaphragm and protecting the diaphragm.
    Type: Grant
    Filed: August 31, 2021
    Date of Patent: June 18, 2024
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yusuke Kofuji, Akihiko Ono, Yuki Kudo, Ryota Kitagawa, Masakazu Yamagiwa, Jun Tamura, Satoshi Mikoshiba
  • Publication number: 20240151643
    Abstract: Provided is a laser interferometer including: a laser light source configured to emit laser light; an optical modulator including a vibrator that has a light reflection surface and vibrates in response to a drive signal, the optical modulator being configured to overlap a modulation signal on the laser light by reflecting the laser light on the light reflection surface; and a photodetector configured to receive the laser light including a sample signal derived from an object and the modulation signal, and to output a light-receiving signal. When an inclination angle ?qom is defined by a normal line of the light reflection surface and an incident optical axis of the laser light incident on the light reflection surface, the following Relationship (1) is satisfied. 0[deg]<?qom<5.
    Type: Application
    Filed: November 7, 2023
    Publication date: May 9, 2024
    Inventor: Jun KITAGAWA
  • Publication number: 20240124995
    Abstract: An electrochemical reaction device in an embodiment includes: an electrochemical reaction cell including a first accommodation part for accommodating carbon dioxide, a second accommodation part for accommodating an electrolytic solution containing water, or water vapor, a diaphragm provided between the first accommodation part and the second accommodation part, a reduction electrode arranged in the first accommodation part, and an oxidation electrode arranged in the second accommodation part, a detection unit detecting a reaction amount in the electrochemical reaction cell; a regulation unit regulating an amount of the carbon dioxide to be supplied to the first accommodation part, and a control unit controlling the regulation unit based on a detection signal of the detection unit.
    Type: Application
    Filed: December 27, 2023
    Publication date: April 18, 2024
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Ryota KITAGAWA, Yusuke KOFUJI, Asahi MOTOSHIGE, Masakazu YAMAGIWA, Jun TAMURA, Yuki KUDO, Akihiko ONO, Satoshi MIKOSHIBA
  • Publication number: 20240110293
    Abstract: An ammonia manufacturing apparatus of an embodiment includes: an electrochemical reaction cell including: a first reaction tank in which a reduction electrode is arranged and gaseous nitrogen is supplied; a second reaction tank in which an oxidation electrode is arranged and an electrolytic solution containing water or water vapor is supplied; and a diaphragm provided between the first reaction tank and the second reaction tank. In the ammonia manufacturing apparatus of the embodiment, the reduction electrode includes a reduction catalyst that reduces nitrogen to produce ammonia, a porous carbon material that supports the reduction catalyst, and an organic polymer material that binds the porous carbon material. The porous carbon material has pores with a BET average pore size of 1 nm or more and 15 nm or less.
    Type: Application
    Filed: March 16, 2023
    Publication date: April 4, 2024
    Applicants: KABUSHIKI KAISHA TOSHIBA, The University of Tokyo
    Inventors: Jun TAMURA, Ryota KITAGAWA, Koji MIZUGUCHI, Yoshitsune SUGANO, Yoshiaki NISHIBAYASHI, Kazuya ARASHIBA
  • Patent number: 11946150
    Abstract: An electrochemical reaction device in an embodiment includes: a reaction unit including a first accommodation part to accommodate carbon dioxide and a second accommodation part to accommodate an electrolytic solution containing water; a reduction electrode to reduce the carbon dioxide; an oxidation electrode to oxidize the water; a power supply to pass current between the reduction electrode and the oxidation electrode; a pressure regulator to regulate a pressure in the first accommodation part; a reaction product detector to detect at least one of an amount and a kind of a substance produced at the reduction electrode; and a controller to control the pressure regulator based on a detection signal of the reaction product detector.
    Type: Grant
    Filed: August 4, 2022
    Date of Patent: April 2, 2024
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Ryota Kitagawa, Asahi Motoshige, Yoshitsune Sugano, Masakazu Yamagiwa, Jun Tamura, Yuki Kudo, Akihiko Ono, Satoshi Mikoshiba
  • Publication number: 20240074269
    Abstract: A display device is a display device provided with a display region including a plurality of pixels and a frame region surrounding the display region, and includes: a thin film transistor layer; and a light-emitting element layer including a plurality of light-emitting elements, each including a first electrode, a function layer, and a second electrode, and each having a different luminescent color, wherein the function layer includes a light-emitting layer, and a pair of holding layers sandwiching the light-emitting layer and each including a photosensitive material and a conductive nanoparticle.
    Type: Application
    Filed: January 18, 2021
    Publication date: February 29, 2024
    Inventors: MAKOTO KITAGAWA, JUN SAKUMA, Yunting SHEN
  • Publication number: 20240055283
    Abstract: A substrate processing system includes a substrate processing apparatus, an input/output apparatus, a first control apparatus installed with first software, configured to control the substrate processing apparatus based on a first signal output from the input/output apparatus, and configured to acquire a second signal output from the substrate processing apparatus, a second control apparatus installed with second software, and configured to perform same calculation processing as that of the first control apparatus, and not configured to control the substrate processing apparatus, a first distributor configured to distribute the first signal to the second control apparatus, and a second distributor configured to distribute the second signal to the second control apparatus. The second control apparatus outputs a third signal based on the first signal and the second signal.
    Type: Application
    Filed: October 27, 2023
    Publication date: February 15, 2024
    Inventors: TAICHI YOSHIOKA, NOBUYUKI KAWABATA, KENJI IKEDA, MASATO ANZAI, JUN KITAGAWA, TASUKU SUZUKI
  • Publication number: 20240025472
    Abstract: To provide a controller for rotary electric machine and an electric power steering apparatus which can set a control gain which is used for controlling the d-axis current command value based on the q-axis current deviation between the current command value of q-axis and the current detection value of q-axis, considering the response of the current of q-axis. A controller for rotary electric machine changes the current command value of d-axis, based on a value obtained by multiplying a proportional gain to a q-axis current deviation which is a deviation between the current command value of q-axis and the current detection value of q-axis; and changes the proportional gain in inverse proportion to the rotational angle speed.
    Type: Application
    Filed: November 30, 2020
    Publication date: January 25, 2024
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tatsuya MORI, Jun KITAGAWA, Masahiko ORll, Kenta KUBO, Kenta SAWADA
  • Patent number: 11879730
    Abstract: A laser interferometer includes a light source that emits first laser light, an optical modulator that includes a vibrator and modulates the first laser light by using the vibrator to generate second laser light including a modulated signal, a photodetector that receives interference light between third laser light including a sample signal generated by reflecting the first laser light on an object and the second laser light to output a light reception signal, and an optical path length variable section that changes an optical path length of an optical path through which the third laser light propagates.
    Type: Grant
    Filed: August 24, 2021
    Date of Patent: January 23, 2024
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Jun Kitagawa
  • Publication number: 20230412100
    Abstract: To provide a controller for rotary electric machine and an electric power steering apparatus which can increases decreases an increase amount of the current of d-axis in the negative direction appropriately, and can perform the weakening magnetic flux appropriately, irrespective of increase and decrease in the rotational angle speed, without using the information on the inductance and the interlinkage flux of the rotor. A controller for rotary electric machine, in a case where the current command value of q-axis is a positive value, changes the current command value of d-axis, based on a deviation between an offset q-axis current command value obtained by subtracting the q-axis offset value of the positive value from the current command value of q-axis, and the current detection value of q-axis.
    Type: Application
    Filed: November 30, 2020
    Publication date: December 21, 2023
    Applicant: Mitsubishi Electric Corporation
    Inventors: Jun KITAGAWA, Tatsuya MORI, Masahiko ORII, Kenta KUBO, Kenta SAWADA
  • Patent number: 11833612
    Abstract: A metal member includes a first plate, and a second plate abutting against and welded to the first plate in at least one butt portion. In the butt portion, a length from a first end to a second end of a welding boundary line between the first plate and the second plate is longer than a length of a straight line connecting the first end to the second end of the welding boundary line.
    Type: Grant
    Filed: June 17, 2022
    Date of Patent: December 5, 2023
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuji Egawa, Eita Niisato, Jun Kitagawa, Masahiro Onoda
  • Publication number: 20230288184
    Abstract: There is provided a laser interferometer. The laser interferometer includes a laser light source; a first light splitter configured to split the laser light into first split light and second split light; an optical modulator configured to modulate the first split light into reference light from the first split light; a second light splitter configured to split the reference light and object light generated by an object to be measured reflecting the second split light into third split light and fourth split light; a first light receiving element configured to receive the third split light; and a second light receiving element configured to receive the fourth split light. An optical axis of the first split light that travels from the first light splitter toward the optical modulator is shifted from an optical axis of the reference light that travels from the optical modulator toward the first light splitter.
    Type: Application
    Filed: September 22, 2022
    Publication date: September 14, 2023
    Inventor: Jun KITAGAWA
  • Patent number: 11736049
    Abstract: To provide a motor controller which can suppress occurrence of a torque difference between systems, even if a DC voltage difference occurs between systems, in the case where each system is provided with a DC power source. A motor controller is provided with a first controller that controls so that the first q-axis current detection value approaches the second q-axis current detection value or the second q-axis current command value obtained from the second controller, when determining that the first DC voltage is higher than the second DC voltage; and a second controller that controls so that the second q-axis current detection value approaches the first q-axis current detection value or the first q-axis current command value obtained from the first controller, when determining that the second DC voltage is higher than the first DC voltage.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: August 22, 2023
    Assignee: Mitsubishi Electric Corporation
    Inventors: Jun Kitagawa, Tatsuya Mori, Hiroko Ikeda, Haruna Koyama, Kenta Kubo
  • Publication number: 20220393627
    Abstract: To provide a motor controller which can suppress occurrence of a torque difference between systems, even if a DC voltage difference occurs between systems, in the case where each system is provided with a DC power source. A motor controller is provided with a first controller that controls so that the first q-axis current detection value approaches the second q-axis current detection value or the second q-axis current command value obtained from the second controller, when determining that the first DC voltage is higher than the second DC voltage; and a second controller that controls so that the second q-axis current detection value approaches the first q-axis current detection value or the first q-axis current command value obtained from the first controller, when determining that the second DC voltage is higher than the first DC voltage.
    Type: Application
    Filed: November 27, 2019
    Publication date: December 8, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Jun KITAGAWA, Tatsuya MORI, Hiroko IKEDA, Haruna KOYAMA, Kenta KUBO
  • Publication number: 20220347794
    Abstract: A first workpiece and a second workpiece respectively include a first joint portion and a second joint portion which extend linearly. Among the first joint portion and the second joint portion, the second joint portion includes a seating portion that abuts the first joint portion, and an overlapping portion inclined in a direction that moves away from the first joint portion. When joining is to be performed, first the seating portion is butted against the first joint portion, and then the overlapping portion is pressed toward the first joint portion by means of a pressing force applying means. In addition, laser light is radiated at parts of the first joint portion and the overlapping portion that are in proximity to one another.
    Type: Application
    Filed: June 10, 2020
    Publication date: November 3, 2022
    Inventors: Yasuhiro Ito, Naoki Takahashi, Jun Kitagawa, Akihiro Nemoto
  • Publication number: 20220314368
    Abstract: A metal member includes a first plate, and a second plate abutting against and welded to the first plate in at least one butt portion. In the butt portion, a length from a first end to a second end of a welding boundary line between the first plate and the second plate is longer than a length of a straight line connecting the first end to the second end of the welding boundary line.
    Type: Application
    Filed: June 17, 2022
    Publication date: October 6, 2022
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuji Egawa, Eita Niisato, Jun Kitagawa, Masahiro Onoda
  • Publication number: 20220250189
    Abstract: This joining apparatus, which is a joining component manufacturing apparatus, comprises a pressing-force-applying means that applies a pressing force for pressing a second joining part that is formed on a second workpiece toward a first joining part that is formed on a first workpiece. The joining apparatus is provided with a laser light irradiation device that irradiates a site where the first joining part and the second joining part are brought close together with laser light. The pressing-force-applying means and the laser light irradiation device move as an integrated unit along the direction of extension of the first joining part and the second joining part due to a movement device.
    Type: Application
    Filed: June 10, 2020
    Publication date: August 11, 2022
    Inventors: Yasuhiro Ito, Naoki Takahashi, Jun Kitagawa, Akihiro Nemoto
  • Patent number: 11364569
    Abstract: A metal member includes a first plate, and a second plate abutting against and welded to the first plate in at least one butt portion. In the butt portion, a length from a first end to a second end of a welding boundary line between the first plate and the second plate is longer than a length of a straight line connecting the first end to the second end of the welding boundary line.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: June 21, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuji Egawa, Eita Niisato, Jun Kitagawa, Masahiro Onoda
  • Publication number: 20220166356
    Abstract: To provide a controller for rotary electric machine which can suppress the increase in the switching frequency by the voltage for estimation while reducing the estimation delay of the magnetic pole position (the rotational angle). A controller for rotary electric machine turns on and off switching devices which the inverter has and applies voltage to the winding, based on a comparison result between the voltage command and the carrier wave; generates the voltage command for estimation of a preliminarily set one period on a stationary coordinate system fixed to the winding; generates the carrier wave of the same one period as the one period of the voltage command for estimation; extracts the frequency component of the one period of the voltage command for estimation from the current detection value; and estimates a rotational angle based on the frequency component.
    Type: Application
    Filed: June 4, 2019
    Publication date: May 26, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Jun KITAGAWA, Tatsuya MORI, Isao KEZOBO, Seiji SAWADA, Kenta KUBO