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).
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Patent number: 11975778Abstract: 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: GrantFiled: February 3, 2021Date of Patent: May 7, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Katsuhisa Yoshikawa, Yuji Suzuki, Keita Yamazaki, Kei Matsumoto, Hiroyuki Ito, Takashi Ogawa, Yukiya Sugiyama, Masaru Ando, Yasushi Fujiwara, Azusa Nakagame, Erina Toyama
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Publication number: 20230305450Abstract: 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: ApplicationFiled: March 17, 2023Publication date: September 28, 2023Inventors: Keita YOSHIKAWA, Kentaroh KUROSU, Taichi URAYAMA, Suguru YOKOZAWA
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Patent number: 11406009Abstract: 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: GrantFiled: November 24, 2020Date of Patent: August 2, 2022Assignee: Ricoh Company, Ltd.Inventors: Yukihiro Mitani, Keita Yoshikawa
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Publication number: 20210076487Abstract: 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: ApplicationFiled: November 24, 2020Publication date: March 11, 2021Applicant: Ricoh Company, Ltd.Inventors: Yukihiro Mitani, Keita Yoshikawa
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Patent number: 10887981Abstract: 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: GrantFiled: September 19, 2018Date of Patent: January 5, 2021Assignee: Ricoh Company, Ltd.Inventors: Yukihiro Mitani, Keita Yoshikawa
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Patent number: 10423114Abstract: 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: GrantFiled: April 10, 2017Date of Patent: September 24, 2019Assignee: RICOH COMPANY, LTD.Inventor: Keita Yoshikawa
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Publication number: 20190166710Abstract: 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: ApplicationFiled: September 19, 2018Publication date: May 30, 2019Applicant: Ricoh Company, Ltd.Inventors: Yukihiro Mitani, Keita Yoshikawa
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Publication number: 20170299999Abstract: 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: ApplicationFiled: April 10, 2017Publication date: October 19, 2017Inventor: Keita YOSHIKAWA
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Patent number: 9106861Abstract: 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: GrantFiled: December 19, 2013Date of Patent: August 11, 2015Assignee: Ricoh Company, Ltd.Inventors: Tatsuya Miyadera, Hideo Tanaka, Keita Yoshikawa, Akinobu Nakamura
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Patent number: 8983330Abstract: 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: GrantFiled: February 22, 2013Date of Patent: March 17, 2015Assignee: Ricoh Company, Ltd.Inventors: Akinobu Nakamura, Yutaka Aso, Fuminori Tsuchiya, Susumu Miyazaki, Keita Yoshikawa, Tatsuya Miyadera, Motohiro Kawanabe
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Publication number: 20140204429Abstract: 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: ApplicationFiled: December 19, 2013Publication date: July 24, 2014Applicant: RICOH COMPANY, LTD.Inventors: Tatsuya MIYADERA, Hideo TANAKA, Keita YOSHIKAWA, Akinobu NAKAMURA
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Publication number: 20130223867Abstract: 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: ApplicationFiled: February 22, 2013Publication date: August 29, 2013Inventors: Akinobu NAKAMURA, Yutaka ASO, Fuminori TSUCHIYA, Susumu MIYAZAKI, Keita YOSHIKAWA, Tatsuya MIYADERA, Motohiro KAWANABE