Patents by Inventor Keita YOSHIKAWA

Keita YOSHIKAWA 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: 11975778
    Abstract: An information processing apparatus disclosed has a controller configured to execute the processing of accepting a request for retrieving a target vehicle body unit that is laid at a specific place, selecting a chassis unit for retrieval from among chassis units in the state separated from any vehicle body unit, the chassis unit for retrieval being a chassis unit to be used to retrieve the target vehicle body unit, and sending a retrieval command to the chassis unit for retrieval, the retrieval command being a command to retrieve the target vehicle body unit.
    Type: Grant
    Filed: February 3, 2021
    Date of Patent: May 7, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsuhisa Yoshikawa, Yuji Suzuki, Keita Yamazaki, Kei Matsumoto, Hiroyuki Ito, Takashi Ogawa, Yukiya Sugiyama, Masaru Ando, Yasushi Fujiwara, Azusa Nakagame, Erina Toyama
  • Publication number: 20230305450
    Abstract: A power supply device includes: a DC power supply that generates a DC voltage of a variable value and outputs the DC voltage; an AC power supply that generates an AC voltage of a variable value, and superimposes the AC voltage and the DC voltage to generate a superimposed voltage for output; and a control circuit. The control circuit start giving the DC power supply an instruction to output the DC voltage, and start giving the AC power supply an instruction to output the AC voltage for restricting output of the DC voltage. The control circuit controls an absolute value of the superimposed voltage to be smaller than or equal to a predetermined value in a predetermined period from a time when the giving of the instruction to output the AC voltage is started to a time when the restricting of the output of the DC voltage is started.
    Type: Application
    Filed: March 17, 2023
    Publication date: September 28, 2023
    Inventors: Keita YOSHIKAWA, Kentaroh KUROSU, Taichi URAYAMA, Suguru YOKOZAWA
  • Patent number: 11406009
    Abstract: A substrate includes a primary circuit; a secondary circuit; and a ground (GND) patterns. In a path between the primary circuit and the secondary circuit without passing through the GND pattern, reinforced insulation is provided between the primary circuit and the secondary circuit. In a path between the primary circuit and the secondary circuit through the GND pattern, one of 1) a combination of reinforced insulation and functional insulation and 2) a combination of basic insulation, additional insulation, and functional insulation is provided between the primary circuit and the secondary circuit.
    Type: Grant
    Filed: November 24, 2020
    Date of Patent: August 2, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Yukihiro Mitani, Keita Yoshikawa
  • Publication number: 20210076487
    Abstract: A substrate includes a primary circuit; a secondary circuit; and a ground (GND) patterns. In a path between the primary circuit and the secondary circuit without passing through the GND pattern, reinforced insulation is provided between the primary circuit and the secondary circuit. In a path between the primary circuit and the secondary circuit through the GND pattern, one of 1) a combination of reinforced insulation and functional insulation and 2) a combination of basic insulation, additional insulation, and functional insulation is provided between the primary circuit and the secondary circuit.
    Type: Application
    Filed: November 24, 2020
    Publication date: March 11, 2021
    Applicant: Ricoh Company, Ltd.
    Inventors: Yukihiro Mitani, Keita Yoshikawa
  • Patent number: 10887981
    Abstract: A substrate includes a primary circuit; a secondary circuit; and a ground (GND) patterns. In a path between the primary circuit and the secondary circuit without passing through the GND pattern, reinforced insulation is provided between the primary circuit and the secondary circuit. In a path between the primary circuit and the secondary circuit through the GND pattern, one of 1) a combination of reinforced insulation and functional insulation and 2) a combination of basic insulation, additional insulation, and functional insulation is provided between the primary circuit and the secondary circuit.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: January 5, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Yukihiro Mitani, Keita Yoshikawa
  • Patent number: 10423114
    Abstract: A power supply device includes a DC power supply circuit to output a DC voltage, an AC power supply circuit to generate an AC voltage, and a power supply control circuit to control the DC power supply circuit and the AC power supply circuit. The AC power supply circuit outputs a superimposed voltage in which the DC voltage is superimposed with the AC voltage. The power supply control circuit controls the DC power supply circuit to output the DC voltage according to a DC output value corresponding to the AC voltage.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: September 24, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventor: Keita Yoshikawa
  • Publication number: 20190166710
    Abstract: A substrate includes a primary circuit; a secondary circuit; and a ground (GND) patterns. In a path between the primary circuit and the secondary circuit without passing through the GND pattern, reinforced insulation is provided between the primary circuit and the secondary circuit. In a path between the primary circuit and the secondary circuit through the GND pattern, one of 1) a combination of reinforced insulation and functional insulation and 2) a combination of basic insulation, additional insulation, and functional insulation is provided between the primary circuit and the secondary circuit.
    Type: Application
    Filed: September 19, 2018
    Publication date: May 30, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Yukihiro Mitani, Keita Yoshikawa
  • Publication number: 20170299999
    Abstract: A power supply device includes a DC power supply circuit to output a DC voltage, an AC power supply circuit to generate an AC voltage, and a power supply control circuit to control the DC power supply circuit and the AC power supply circuit. The AC power supply circuit outputs a superimposed voltage in which the DC voltage is superimposed with the AC voltage. The power supply control circuit controls the DC power supply circuit to output the DC voltage according to a DC output value corresponding to the AC voltage.
    Type: Application
    Filed: April 10, 2017
    Publication date: October 19, 2017
    Inventor: Keita YOSHIKAWA
  • Patent number: 9106861
    Abstract: An image forming control device and an image forming control method control an image forming apparatus that forms an image at every scanning line. The image forming control device includes a pixel data generation controller and an image forming mechanism controller. The pixel data generation controller receives data of an image to be formed and an instruction for image formation, and generates image data to be input to an image forming mechanism that forms an image on a recording medium. The pixel data includes data of each pixel that makes up the image to be formed. The image forming mechanism controller controls image formation performed by the image forming mechanism according to the generated pixel data.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: August 11, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Miyadera, Hideo Tanaka, Keita Yoshikawa, Akinobu Nakamura
  • Patent number: 8983330
    Abstract: Disclosed is a power supply including a first voltage generating unit that generates a first voltage from an external power supply; a second voltage generating unit that generates a first predetermined voltage and supplies the generated first predetermined voltage to the load; a third voltage generating unit that generates the first predetermined voltage and supplies the generated first predetermined voltage to the load; and a controller that causes the first voltage to be greater than or equal to a second voltage during a first mode, and causes the first voltage to be less than the second voltage during a second mode. During the first mode, the power is supplied from the second voltage generating unit and the third voltage generating unit to the load, and during the second mode, the power is supplied from the third voltage generating unit to the load.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: March 17, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Akinobu Nakamura, Yutaka Aso, Fuminori Tsuchiya, Susumu Miyazaki, Keita Yoshikawa, Tatsuya Miyadera, Motohiro Kawanabe
  • Publication number: 20140204429
    Abstract: An image forming control device and an image forming control method control an image forming apparatus that forms an image at every scanning line. The image forming control device includes a pixel data generation controller and an image forming mechanism controller. The pixel data generation controller receives data of an image to be formed and an instruction for image formation, and generates image data to be input to an image forming mechanism that forms an image on a recording medium. The pixel data includes data of each pixel that makes up the image to be formed. The image forming mechanism controller controls image formation performed by the image forming mechanism according to the generated pixel data.
    Type: Application
    Filed: December 19, 2013
    Publication date: July 24, 2014
    Applicant: RICOH COMPANY, LTD.
    Inventors: Tatsuya MIYADERA, Hideo TANAKA, Keita YOSHIKAWA, Akinobu NAKAMURA
  • Publication number: 20130223867
    Abstract: Disclosed is a power supply including a first voltage generating unit that generates a first voltage from an external power supply; a second voltage generating unit that generates a first predetermined voltage and supplies the generated first predetermined voltage to the load; a third voltage generating unit that generates the first predetermined voltage and supplies the generated first predetermined voltage to the load; and a controller that causes the first voltage to be greater than or equal to a second voltage during a first mode, and causes the first voltage to be less than the second voltage during a second mode. During the first mode, the power is supplied from the second voltage generating unit and the third voltage generating unit to the load, and during the second mode, the power is supplied from the third voltage generating unit to the load.
    Type: Application
    Filed: February 22, 2013
    Publication date: August 29, 2013
    Inventors: Akinobu NAKAMURA, Yutaka ASO, Fuminori TSUCHIYA, Susumu MIYAZAKI, Keita YOSHIKAWA, Tatsuya MIYADERA, Motohiro KAWANABE