Patents by Inventor Kyohei YAMADA

Kyohei 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).

  • Publication number: 20250068110
    Abstract: An image forming system includes an image forming apparatus, a varnish applying apparatus, an input unit, a first image processing unit, and a second image processing unit. The image forming apparatus forms a toner image on a recording material on the basis of image data obtained by subjecting first image data to data change processing. The varnish applying apparatus forms a varnish image on the recording material on the basis of image data obtained by subjecting second image data to the data change processing.
    Type: Application
    Filed: November 14, 2024
    Publication date: February 27, 2025
    Inventors: TOSHIYUKI YAMADA, YOSHIRO TSUKADA, MASAMI HANO, SHINGO HIROTA, TARO HANAZATO, DAISUKE KATAYAMA, KYOHEI KIKUCHI
  • Patent number: 12216423
    Abstract: An image forming system includes an image forming apparatus, a fixing device, a varnish image forming apparatus, an image reading portion, and a controller. The controller corrects first image data depending on first detection image data of a toner image formed on a first recording material and read by the image reading portion, and then depending on the corrected first image data, a toner image is formed on a second recording material subsequent to the first recording material. The controller corrects second image data depending on second detection image data of a varnish image read by the image reading portion, and then depending on the corrected second image data, a varnish image is formed on the second recording material.
    Type: Grant
    Filed: August 3, 2023
    Date of Patent: February 4, 2025
    Assignee: Canon Kabushiki Kaisha
    Inventors: Taro Hanazato, Yoshiro Tsukada, Masami Hano, Shingo Hirota, Toshiyuki Yamada, Daisuke Katayama, Kyohei Kikuchi
  • Publication number: 20240219526
    Abstract: For example, an influence of a series resonant circuit formed when a switching unit is turned off is reduced. An illumination device includes a light emission element including a first light emission unit group including a plurality of first light emission units and a second light emission unit group including a plurality of second light emission units, a first electrode of the first light emission unit group and a second electrode of the second light emission unit group made common, a first switching unit connected between a power supply and a third electrode of the first light emission unit group, a second switching unit connected between the power supply and a fourth electrode of the second light emission unit group, and at least one capacitor connected to a connection point between the power supply and the first switching unit and second switching unit.
    Type: Application
    Filed: February 15, 2022
    Publication date: July 4, 2024
    Inventors: KYOHEI YAMADA, MOTOI KIMURA, KOUJI MORI, TATSUYA OIWA, TAKASHI KOBAYASHI
  • Patent number: 10693387
    Abstract: A transformer is provided between a power supply and a load, and includes a front stage circuit and a rear stage circuit each having a function of performing switching so as to alternately invert a polarity of output relative to input. The transformer further includes: a series unit provided in at least one of both circuits and composed of a pair of reactance elements connected in series to each other via a connection point; and a switch device which, with both ends of the series unit serving as a first port, causes a part between one end of the series unit and the connection point, and a part between the other end of the series unit and the connection point, to serve as a second port alternately through switching while inverting a polarity, and executes power transmission from the first port to the second port or vice versa.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: June 23, 2020
    Assignees: Sumitomo Electric Industries, Ltd., National University Corporation Toyohashi University of Technology
    Inventors: Hideaki Nakahata, Kenichi Hirotsu, Nobuo Shiga, Takashi Ohira, Kyohei Yamada, Daiya Egashira
  • Patent number: 10320305
    Abstract: A transformer is provided between a power supply, and a load with a resistance value R, and includes a two-terminal pair circuit composed of n-number of reactance elements that are mutually connected, where n is a natural number equal to or greater than 4. With respect to any value of the resistance value R of the load, an input impedance Zin of the two-terminal pair circuit has a real number component of k·R, where k is a constant, and an imaginary number component of 0. Such a transformer has a small size and a light weight, and does not need a coil, an iron core, and the like as used in a conventional transformer.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: June 11, 2019
    Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., NATIONAL UNIVERSITY CORPORATION TOYOHASHI OF TECHNOLOGY
    Inventors: Kenichi Hirotsu, Nobuo Shiga, Hideaki Nakahata, Takashi Ohira, Kyohei Yamada
  • Patent number: 10122288
    Abstract: A transformer includes a front stage circuit and a rear stage circuit. As a front stage circuit, a switch series unit, which is connected in parallel to a power supply, includes odd-numbered switches and even-numbered switches alternately turned ON. Mutual connection points of the respective switches and points at both ends of the switch series unit are regarded as m nodes in total. Capacitors are provided on at least one of a first electrical path combining odd nodes to lead them to a first output port, and a second electrical path combining even nodes to lead them to a second output port. The capacitors are present so as to correspond to at least (m?1) nodes. The rear stage circuit includes an element series unit, which is composed of a pair of semiconductor elements connected in series to each other for conducting operations of mutually opposite polarities, and necessary inductors.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: November 6, 2018
    Assignees: Sumitomo Electric Industries, Ltd., National University Corporation Toyohashi University of Technology
    Inventors: Hideaki Nakahata, Kenichi Hirotsu, Takashi Ohira, Kyohei Yamada, Daiya Egashira
  • Patent number: 10116197
    Abstract: A front stage circuit of a transformer includes a switch series unit, capacitors, and a ground electrical path. The switch series unit, connected in parallel to a power supply, includes odd-numbered/even-numbered switches configured to be alternately turned ON. Assuming that mutual connection points of the switches and points at both ends of the switch series unit are m nodes in total, and one of the points at the both ends is a ground node, the capacitors are provided on at least one of a first electrical path that combines odd nodes and leads them to a first output port, and a second electrical path that combines even nodes and leads them to a second output port, and the capacitors are present to correspond to (m?1) nodes excluding the ground node. The ground electrical path connects the ground node directly to the first output port without an interposed capacitor.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: October 30, 2018
    Assignees: Sumitomo Electric Industries, Ltd., National University Corporation Toyohashi University of Technology
    Inventors: Hideaki Nakahata, Satoshi Hatsukawa, Kenichi Hirotsu, Takashi Ohira, Kyohei Yamada, Daiya Egashira
  • Publication number: 20170294829
    Abstract: A front stage circuit of a transformer includes a switch series unit, capacitors, and a ground electrical path. The switch series unit, connected in parallel to a power supply, includes odd-numbered/even-numbered switches configured to be alternately turned ON. Assuming that mutual connection points of the switches and points at both ends of the switch series unit are m nodes in total, and one of the points at the both ends is a ground node, the capacitors are provided on at least one of a first electrical path that combines odd nodes and leads them to a first output port, and a second electrical path that combines even nodes and leads them to a second output port, and the capacitors are present to correspond to (m?1) nodes excluding the ground node. The ground electrical path connects the ground node directly to the first output port without an interposed capacitor.
    Type: Application
    Filed: October 9, 2015
    Publication date: October 12, 2017
    Applicants: Sumitomo Electric Industries, Ltd., NATIONAL UNIVERSITY CORPORATION TOYOHASHI UNIVERSITY OF TECHNOLOGY, NATIONAL UNIVERSITY CORPORATION TOYOHASHI UNIVERSITY OF TECHNOLOGY
    Inventors: Hideaki Nakahata, Satoshi Hatsukawa, Kenichi Hirotsu, Takashi Ohira, Kyohei Yamada, Daiya Egashira
  • Publication number: 20170288559
    Abstract: A transformer includes a front stage circuit and a rear stage circuit. As a front stage circuit, a switch series unit, which is connected in parallel to a power supply, includes odd-numbered switches and even-numbered switches alternately turned ON. Mutual connection points of the respective switches and points at both ends of the switch series unit are regarded as m nodes in total. Capacitors are provided on at least one of a first electrical path combining odd nodes to lead them to a first output port, and a second electrical path combining even nodes to lead them to a second output port. The capacitors are present so as to correspond to at least (m?1) nodes. The rear stage circuit includes an element series unit, which is composed of a pair of semiconductor elements connected in series to each other for conducting operations of mutually opposite polarities, and necessary inductors.
    Type: Application
    Filed: October 9, 2015
    Publication date: October 5, 2017
    Applicants: Sumitomo Electric Industries, Ltd., National University Corporation Toyohashi University of Technology
    Inventors: Hideaki Nakahata, Kenichi Hirotsu, Takashi Ohira, Kyohei Yamada, Daiya Egashira
  • Patent number: 9712069
    Abstract: A transformer of distributed-constant type is provided between an AC power supply with a frequency f and a load with a resistance value R, and includes: a first converter connected to the AC power supply and having a length of ?/4; and a second converter provided between an end of the first converter and the load, and having a length of ?/4, where a wavelength at the frequency f is ?. Such a transformer has a small size and a light weight, and does not need a coil, an iron core, and the like as used in a conventional transformer.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: July 18, 2017
    Assignees: Sumitomo Electric Industries, Ltd., National University Corporation Toyohashi University of Technology
    Inventors: Hideaki Nakahata, Nobuo Shiga, Kenichi Hirotsu, Takashi Ohira, Kyohei Yamada
  • Publication number: 20160211760
    Abstract: A transformer is provided between a power supply, and a load with a resistance value R, and includes a two-terminal pair circuit composed of n-number of reactance elements that are mutually connected, where n is a natural number equal to or greater than 4. With respect to any value of the resistance value R of the load, an input impedance Zin of the two-terminal pair circuit has a real number component of k·R, where k is a constant, and an imaginary number component of 0. Such a transformer has a small size and a light weight, and does not need a coil, an iron core, and the like as used in a conventional transformer.
    Type: Application
    Filed: August 8, 2014
    Publication date: July 21, 2016
    Inventors: Kenichi HIROTSU, Nobuo SHIGA, Hideaki NAKAHATA, Takashi OHIRA, Kyohei Yamada
  • Publication number: 20160204708
    Abstract: A transformer of distributed-constant type is provided between an AC power supply with a frequency f and a load with a resistance value R, and includes: a first converter connected to the AC power supply and having a length of ?/4; and a second converter provided between an end of the first converter and the load, and having a length of ?/4, where a wavelength at the frequency f is ?. Such a transformer has a small size and a light weight, and does not need a coil, an iron core, and the like as used in a conventional transformer.
    Type: Application
    Filed: August 5, 2014
    Publication date: July 14, 2016
    Inventors: Hideaki NAKAHATA, Nobuo SHIGA, Kenichi HIROTSU, Takashi OHIRA, Kyohei YAMADA
  • Publication number: 20160181937
    Abstract: A transformer is provided between a power supply and a load, and includes a front stage circuit and a rear stage circuit each having a function of performing switching so as to alternately invert a polarity of output relative to input. The transformer further includes: a series unit provided in at least one of both circuits and composed of a pair of reactance elements connected in series to each other via a connection point; and a switch device which, with both ends of the series unit serving as a first port, causes a part between one end of the series unit and the connection point, and a part between the other end of the series unit and the connection point, to serve as a second port alternately through switching while inverting a polarity, and executes power transmission from the first port to the second port or vice versa.
    Type: Application
    Filed: August 29, 2014
    Publication date: June 23, 2016
    Inventors: Hideaki NAKAHATA, Kenichi HIROTSU, Nobuo SHIGA, Takashi OHIRA, Kyohei YAMADA, Daiya EGASHIRA