Patents by Inventor Yohei Miura

Yohei Miura 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: 20210184640
    Abstract: A decision feedback equalizer circuit includes first and second equalizers implemented in parallel. Each equalizer includes: an adder; and a comparator configured to alternatingly perform refreshing and sampling for a differential signal output from the adder. The comparator includes: a differential amplifier configured to output a differential signal having same values in a refresh period, and output a differential signal corresponding to the differential signal output from the adder in a sampling period; and a latch circuit configured to perform a decision operation based on a comparison between two signals that form the differential signal output from the differential amplifier, and to latch a decision result. The adder in the first equalizer controls the differential signal based on the decision in the second equalizer, and the adder in the second equalizer controls the differential signal based on the decision in the first equalizer.
    Type: Application
    Filed: November 30, 2020
    Publication date: June 17, 2021
    Applicant: FUJITSU LIMITED
    Inventor: Yohei Miura
  • Patent number: 10591853
    Abstract: A moving device, which is included in an image forming apparatus, includes a cam, a moving body, a biasing body, a drive source and a drive transmission device. The moving body is configured to be moved by the cam. The biasing body is configured to apply a biasing force to bias the moving body toward the cam. The drive source is configured to apply a driving force to the cam. The drive transmission device is configured to transmit the driving force to the cam and includes a load applying body configured to apply a load to a rotation of the cam.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: March 17, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Kenji Tomita, Kimihiro Tanaka, Yohei Miura, Hiroaki Nieda
  • Patent number: 10268143
    Abstract: A drive device, which is included in an image forming apparatus, includes a drive source, a drive switching device configured to switch between a transmission state and a halting state, a first rotary body having a rotary shaft, a first drive transmission passage through which a driving force is transmitted to the first rotary body, a second rotary body, a second drive transmission passage through which the driving force is transmitted to the second rotary body, a drive transmission body rotatably mounted on the rotary shaft of the first rotary body, and an input drive transmission body mounted on the rotary shaft of the first rotary body and configured to input the driving force to the rotary shaft of the first rotary body, the input drive transmission body configured to rotate together with the drive transmission body as a single unit.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: April 23, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kimihiro Tanaka, Kenji Tomita, Yohei Miura, Kentaro Uji
  • Publication number: 20190115721
    Abstract: A laser diode control circuit includes, a control signal supply circuit that supplies a control signal including a direct current component and an alternating current component to a laser diode, an optical output signal acquisition circuit that acquires an optical output signal indicating an optical output of the laser diode according to the control signal, a phase determination circuit that determines whether a phase of the alternating current component included in the optical output signal is the same as the phase of the alternating current component included in the control signal, and a control signal determination circuit that determines to decrease the direct current component of the control signal when it is determined that the phase of the alternating current component included in the optical output signal is not the same as the phase of the alternating current component included in the control signal.
    Type: Application
    Filed: October 11, 2018
    Publication date: April 18, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Hirotomo Izumi, Shigeki Kawaai, Daisuke USUI, Yohei Miura
  • Publication number: 20190074534
    Abstract: A fuel cell stack includes a fuel manifold and a fuel cell. The fuel cell extends from the fuel manifold. The fuel cell includes a support substrate and a plurality of electricity generating elements. The support substrate includes a gas flow pathway extending along a lengthwise direction. The plurality of electricity generating elements are disposed on the support substrate, while being disposed away from each other at intervals along the lengthwise direction. A base end-side electricity generating element disposed as gas supply-side endmost one of the plurality of electricity generating elements has an area greater than an average area of the plurality of electricity generating elements except for the base end-side electricity generating element.
    Type: Application
    Filed: November 2, 2018
    Publication date: March 7, 2019
    Inventors: Yohei MIURA, Noriyuki OGASAWARA, Makoto OHMORI
  • Patent number: 10054884
    Abstract: A fixing device, which is included in an image forming apparatus, includes a heater, a heating target body, a biasing body, a pressure body, a moving body, a drive source, and a drive transmitter. The heating target body is configured to be heated by the heater. The biasing body is configured to apply a biasing force. The pressure body is configured to be pressed by the biasing body toward the heating target body. The moving body is configured to move the pressure body away from the heating target body against the biasing force applied by the biasing body. The drive source is configured to apply a driving force. The drive transmitter is configured to transmit the driving force of the drive source to the moving body and includes a planetary gear device and a worm gear.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: August 21, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Kenji Tomita, Kimihiro Tanaka, Yohei Miura
  • Publication number: 20180224779
    Abstract: A moving device, which is included in an image forming apparatus, includes a cam, a moving body, a biasing body, a drive source and a drive transmission device. The moving body is configured to be moved by the cam. The biasing body is configured to apply a biasing force to bias the moving body toward the cam. The drive source is configured to apply a driving force to the cam. The drive transmission device is configured to transmit the driving force to the cam and includes a load applying body configured to apply a load to a rotation of the cam.
    Type: Application
    Filed: January 24, 2018
    Publication date: August 9, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Kenji TOMITA, Kimihiro TANAKA, Yohei MIURA, Hiroaki NIEDA
  • Publication number: 20180181030
    Abstract: A drive device, which is included in an image forming apparatus, includes a drive source, a drive switching device configured to switch between a transmission state and a halting state, a first rotary body having a rotary shaft, a first drive transmission passage through which a driving force is transmitted to the first rotary body, a second rotary body, a second drive transmission passage through which the driving force is transmitted to the second rotary body, a drive transmission body rotatably mounted on the rotary shaft of the first rotary body, and an input drive transmission body mounted on the rotary shaft of the first rotary body and configured to input the driving force to the rotary shaft of the first rotary body, the input drive transmission body configured to rotate together with the drive transmission body as a single unit.
    Type: Application
    Filed: December 20, 2017
    Publication date: June 28, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Kimihiro TANAKA, Kenji TOMITA, Yohei MIURA, Kentaro UJI
  • Patent number: 9847271
    Abstract: A semiconductor device includes: a processor having a heat sink mounted thereon; and an optical module having a heat transfer interposer, wherein the heat sink and the optical module are coupled to each other via the heat transfer interposer. And a semiconductor device includes: a semiconductor chip mounted on a substrate; a lead that covers the semiconductor chip; a heat sink installed on the lead; and an optical module coupled to the heat sink via a heat transfer interposer.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: December 19, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Yohei Miura, Yasushi Masuda, Satoshi Ohsawa, Yoshihiro Morita
  • Publication number: 20170343937
    Abstract: A fixing device, which is included in an image forming apparatus, includes a heater, a heating target body, a biasing body, a pressure body, a moving body, a drive source, and a drive transmitter. The heating target body is configured to be heated by the heater. The biasing body is configured to apply a biasing force. The pressure body is configured to be pressed by the biasing body toward the heating target body. The moving body is configured to move the pressure body away from the heating target body against the biasing force applied by the biasing body. The drive source is configured to apply a driving force. The drive transmitter is configured to transmit the driving force of the drive source to the moving body and includes a planetary gear device and a worm gear.
    Type: Application
    Filed: May 24, 2017
    Publication date: November 30, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Kenji TOMITA, Kimihiro TANAKA, Yohei MIURA
  • Publication number: 20170148703
    Abstract: A semiconductor device includes: a processor having a heat sink mounted thereon; and an optical module having a heat transfer interposer, wherein the heat sink and the optical module are coupled to each other via the heat transfer interposer. And a semiconductor device includes: a semiconductor chip mounted on a substrate; a lead that covers the semiconductor chip; a heat sink installed on the lead; and an optical module coupled to the heat sink via a heat transfer interposer.
    Type: Application
    Filed: October 27, 2016
    Publication date: May 25, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Yohei Miura, Yasushi Masuda, Satoshi Ohsawa, YOSHIHIRO MORITA
  • Patent number: 9640825
    Abstract: A fuel cell includes an anode, a solid electrolyte layer, a barrier layer, and a cathode. The anode includes a transition metal and an oxygen ion conductive material. In the interface region within 3 micrometers from the interface with the solid electrolyte layer of the anode after reduction, the content rate of silicon is less than or equal to 200 ppm, the content rate of phosphorous is less than or equal to 50 ppm, the content rate of chromium is less than or equal to 100 ppm, the content rate of boron is less than or equal to 100 ppm, and the content rate of sulfur is less than or equal to 100 ppm.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: May 2, 2017
    Assignee: NGK INSULATORS, LTD.
    Inventors: Yohei Miura, Makoto Ohmori, Ayano Kobayashi, Takafumi Terahai
  • Publication number: 20170068055
    Abstract: An optical module connector includes a connector configured to be coupled to a package substrate, which is coupled to first solder coupled to a printed board, and to second solder coupled to the printed board, the connector being coupled to the second solder; and an optical-module substrate configured to be detachably coupled to the connector, wherein the connector configured to include a first surface to which the optical-module substrate is coupled, a second surface coupled to the package substrate, and a third surface coupled to the second solder, and wherein the first surface to which the optical-module substrate is coupled includes a fourth surface opposite the second surface and a fifth surface opposite the third surface coupled to the second solder, and wherein a first height from the second surface to the first surface is less than a second height from the third surface to the first surface.
    Type: Application
    Filed: August 25, 2016
    Publication date: March 9, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Yasushi Masuda, YOSHIHIRO MORITA, Satoshi Ohsawa, Yohei Miura
  • Publication number: 20150264810
    Abstract: A circuit board includes: a substrate; a through hole formed in the substrate; and a connection terminal provided in the through hole; wherein the connection terminal includes a pedestal portion provided within the through hole and a pin which is provided at a center of the pedestal portion and extends from the pedestal portion toward a first surface of the substrate, so that a first end portion protrudes from the first surface.
    Type: Application
    Filed: March 3, 2015
    Publication date: September 17, 2015
    Inventors: Shunji BABA, Manabu WATANABE, Kenji FUKUZONO, Satoshi OHSAWA, Tetsuro YAMADA, Akihiro WAKABAYASHI, Yasushi MASUDA, Yohei MIURA
  • Publication number: 20150194692
    Abstract: A fuel cell includes an anode, a solid electrolyte layer, a barrier layer, and a cathode. The anode includes a transition metal and an oxygen ion conductive material. In the interface region within 3 micrometers from the interface with the solid electrolyte layer of the anode after reduction, the content rate of silicon is less than or equal to 200 ppm, the content rate of phosphorous is less than or equal to 50 ppm, the content rate of chrome is less than or equal to 100 ppm, the content rate of boron is less than or equal to 100 ppm, and the content rate of sulfur is less than or equal to 100 ppm.
    Type: Application
    Filed: March 18, 2015
    Publication date: July 9, 2015
    Inventors: Yohei MIURA, Makoto OHMORI, Ayano KOBAYASHI, Takafumi TERAHAI
  • Patent number: 9017898
    Abstract: A fuel cell (10) includes an anode (11), a solid electrolyte layer (12), a barrier layer (13), and a cathode (14). The anode (11) includes a transition metal and an oxygen ion conductive material. In the interface region (R) within 3 micrometers from the interface with the solid electrolyte layer (12) of the anode (11) after reduction, the content rate of silicon is less than or equal to 200 ppm, the content rate of phosphorous is less than or equal to 50 ppm, the content rate of chrome is less than or equal to 100 ppm, the content rate of boron is less than or equal to 100 ppm, and the content rate of sulfur is less than or equal to 100 ppm.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: April 28, 2015
    Assignee: NGK Insulators, Ltd.
    Inventors: Yohei Miura, Makoto Ohmori, Ayano Kobayashi, Takafumi Terahai
  • Publication number: 20150084530
    Abstract: According to one embodiment, a power supply device includes a conductive first mounting board, a first switching element, a current control element, and a second switching element. The first switching element is mounted on the first mounting board. The current control element is mounted on the first mounting board, includes a main terminal connected to the first mounting board, is connected to the first switching element in series, and is configured to limit an electric current of the first switching element. The second switching element is connected to the current control element in series. An electric current flows to the second switching element when the first switching element is off.
    Type: Application
    Filed: March 14, 2014
    Publication date: March 26, 2015
    Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATION
    Inventors: Noriyuki Kitamura, Yohei Miura, Hirokazu Otake, Yuji Takahashi
  • Publication number: 20150084510
    Abstract: According to one embodiment, there is provided a power supply device includes a DC-DC converter and a protection circuit. The DC-DC converter includes a switching element of a normally on type, a current control element of the normally on type connected to the switching element in series and configured to control an electric current flowing to the switching element, and a rectifying element connected to the current control element in series. The DC-DC converter converts, according to ON and OFF of the switching element, an input first direct-current voltage into a second-direct current voltage, which has an absolute value different from an absolute value of the first direct-current voltage, and supplies the second direct-current voltage to a load. When an electric current equal to or larger than a predetermined value flows to the switching element and the current control element, the protection circuit cuts off the electric current.
    Type: Application
    Filed: February 26, 2014
    Publication date: March 26, 2015
    Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATION
    Inventors: Yohei Miura, Hiroshi Akahoshi, Noriyuki Kitamura, Hirokazu Otake, Masato Ishikawa, Yuji Takahashi
  • Publication number: 20150084528
    Abstract: According to one embodiment, a power supply device includes a rectifier circuit, a smoothing capacitor, and a normally on type transistor. The rectifier circuit is configured to rectify an alternating current supplied from a voltage source. The smoothing capacitor is charged by an output current output from the rectifier circuit. The normally on type transistor is connected between the rectifier circuit and the smoothing capacitor in series and is configured to limit an output current value of the rectifier circuit during a voltage input from the voltage source to an output current value higher than an output current value of the rectifier circuit during a steady operation.
    Type: Application
    Filed: March 14, 2014
    Publication date: March 26, 2015
    Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATION
    Inventors: Hirokazu Otake, Noriyuki Kitamura, Yuji Takahashi, Masato Ishikawa, Yohei Miura
  • Publication number: 20150085544
    Abstract: A rectifying circuit according to an embodiment includes a first rectifying portion and a second rectifying portion. The first rectifying portion has a positive temperature coefficient. The second rectifying portion has a negative temperature coefficient, is connected in parallel to the first rectifying portion, and has a forward voltage-forward current curve intersecting a forward voltage-forward current curve of the first rectifying portion.
    Type: Application
    Filed: March 14, 2014
    Publication date: March 26, 2015
    Applicant: TOSHIBA LIGHTING & TECHNOLOGY CORPORATION
    Inventors: Hirokazu Otake, Noriyuki Kitamura, Yuji Takahashi, Masato Ishikawa, Yohei Miura