Patents by Inventor Takanori Ishii

Takanori Ishii 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: 11329546
    Abstract: A power converter apparatus is provided to include a switching circuit, and a filter circuit. The switching circuit generates an AC voltage by switching a DC voltage at a predetermining switching frequency, and the filter circuit converts the AC voltage from the switching circuit into the DC voltage by low-pass filtering the AC voltage. The filter circuit induces first and second bypass capacitors, and an inductor. The first bypass capacitor bypasses noise of a first frequency component of the AC voltage from the switching circuit, and the second bypass capacitor bypasses noise of a second frequency component of the AC voltage from the switching circuit, which is lower than the first frequency component. The inductor is inserted between the first and second bypass capacitors, and the inductance thereof is set so that a resonance frequency of the filter circuit is lower than the switching frequency by insertion of the inductor.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: May 10, 2022
    Assignee: OMRON CORPORATION
    Inventors: Noriyuki Nosaka, Takeo Nishikawa, Wataru Okada, Satoshi Iwai, Takanori Ishii, Gun Eto
  • Publication number: 20220060101
    Abstract: A voltage balance circuit including first and second semiconductor devices connected in series with each other is provided with a first transformer having a primary winding and a secondary winding, a second transformer having a primary winding and a secondary winding. A pair of capacitors connected in series with each other and connected between the output terminals of the plurality of semiconductor devices. A first control signal is applied to the control electrode of the first semiconductor device via the primary winding of the first transformer. A second control signal is applied to the control electrode of the second semiconductor device via the primary winding of the second transformer, with one end of each secondary winding connected to each other.
    Type: Application
    Filed: March 14, 2019
    Publication date: February 24, 2022
    Inventors: Noriyuki NOSAKA, Wataru OKADA, Chen CHEN, Takanori ISHII
  • Patent number: 11172610
    Abstract: A transmission for a lawn mower, for transmitting an output of a drive source to a driving wheel, the transmission including a speed-change transmission device and a power transmission device movably coupled to the speed-change transmission device. The power transmission device includes a first power transmission device coupled to the speed-change transmission device and a second power transmission device to which the driving wheel is coupled, and the first power transmission device and the second power transmission device are movably coupled to each other.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: November 16, 2021
    Assignee: KAAZ CORPORATION
    Inventors: Masaki Nonaka, Koichi Ogawa, Takanori Ishii
  • Publication number: 20210273553
    Abstract: A power converter apparatus is provided to include a switching circuit, and a filter circuit. The switching circuit generates an AC voltage by switching a DC voltage at a predetermined switching frequency, and the filter circuit converts the AC voltage from the switching circuit into the DC voltage by low-pass filtering the AC voltage. The filter circuit includes first and second bypass capacitors, and an inductor. The first bypass capacitor bypasses noise of a first frequency component of the AC voltage from the switching circuit, and the second bypass capacitor bypasses noise of a second frequency component of the AC voltage from the switching circuit, which is lower than the first frequency component. The inductor is inserted between the first and second bypass capacitors, and the inductance thereof is set so that a resonance frequency of the filter circuit is lower than multiple times the switching frequency by insertion of the inductor.
    Type: Application
    Filed: March 11, 2019
    Publication date: September 2, 2021
    Inventors: Noriyuki NOSAKA, Takeo NISHIKAWA, Wataru OKADA, Satoshi IWAI, Takanori ISHII, Gun ETO
  • Publication number: 20210167692
    Abstract: A power converter apparatus is provided to include a switching circuit, and a filter circuit. The switching circuit generates an AC voltage by switching a DC voltage at a predetermining switching frequency, and the filter circuit converts the AC voltage from the switching circuit into the DC voltage by low-pass filtering the AC voltage. The filter circuit induces first and second bypass capacitors, and an inductor. The first bypass capacitor bypasses noise of a first frequency component of the AC voltage from the switching circuit, and the second bypass capacitor bypasses noise of a second frequency component of the AC voltage from the switching circuit, which is lower than the first frequency component. The inductor is inserted between the first and second bypass capacitors, and the inductance thereof is set so that a resonance frequency of the filter circuit is lower than the switching frequency by insertion of the inductor.
    Type: Application
    Filed: March 11, 2019
    Publication date: June 3, 2021
    Inventors: Noriyuki NOSAKA, Takeo NISHIKAWA, Wataru OKADA, Satoshi IWAI, Takanori ISHII, Gun ETO
  • Patent number: 11023337
    Abstract: An information processing system includes a plurality of control apparatuses communicably coupled to each other. A first control apparatus of the plurality of control apparatuses includes a first memory configured to store first instructions and a first processor configured to operate using standby power before a power-on selection is made. The first processor executes the first instructions causing a process including collecting first identification information of each of the plurality of control apparatuses other than the first control apparatus. The process includes storing the first identification information in the first memory. The process includes determining a role of the first control apparatus based on a comparison result derived by comparing second identification information of the first control apparatus with the first identification information.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: June 1, 2021
    Assignee: FUJITSU LIMITED
    Inventors: Tatsuya Shinozaki, Takanori Ishii, Keisuke Yamasaki
  • Publication number: 20210135583
    Abstract: An isolated bidirectional DC-DC converter device includes a first full-bridge inverter and a second full-bridge inverter circuit connected via a transformer; the second full-bridge inverter circuit including high-side switching elements and low-side switching elements; and a control unit configured to repeatedly execute an input-side control and an output-side control when boosting the input voltage to the first full-bridge inverter circuit; the control unit selectively executes any of a first control and a second control as the output-side control. The first control maintains the high-side switching elements in the OFF state while alternating each of the low-side switching elements between the ON and OFF states; and the second control maintains the low-side switching elements in the OFF state while alternating each of the high-side switching element between the ON and OFF states.
    Type: Application
    Filed: February 27, 2018
    Publication date: May 6, 2021
    Applicant: OMRON Corporation
    Inventors: Makoto OHASHI, Yoshihiko YAMAGUCHI, Takeo NISHIKAWA, Takanori ISHII
  • Patent number: 10776278
    Abstract: A storing unit stores therein mapping management information indicating mappings between each of a plurality of divided regions created by dividing logical storage space on a storage apparatus and one of a plurality of identification numbers each representing a different write frequency. A control unit measures the write frequency of each of the plurality of divided regions and updates the mappings indicated by the mapping management information based on results of the write frequency measurement. Upon request for a data write to a write address included in a divided region after the update of the mappings, the control unit identifies an identification number associated with the divided region based on the mapping management information, appends the identified identification number to a write request for the write address, and transmits the write request with the identified identification number appended thereto to the storage apparatus.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: September 15, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Takanori Ishii, Tomoka Aoki
  • Patent number: 10348551
    Abstract: An information processing apparatus includes a communication apparatus and a different communication apparatus connected to the communication apparatus via a plurality of transmission paths. The communication apparatus includes a transmitting unit and a control unit. In response to designation of a transmission path targeted for diagnosis, selected amongst the transmission paths while the communication apparatus is in a state capable of data communication with the different communication apparatus using the transmission paths, the transmitting unit transmits a test signal to the targeted transmission path while the state capable of data communication with the different communication apparatus is maintained using remaining transmission paths of the transmission paths other than the targeted transmission path.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: July 9, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Kazuko Sasaki, Tomoyuki Kanayama, Takanori Ishii, Yohei Nuno
  • Publication number: 20190183041
    Abstract: A transmission (10) for a lawn mower, for transmitting an output of a drive source (8) to a driving wheel (4), the transmission including a speed-change transmission device (11) and a power transmission device (12) movably coupled to the speed-change transmission device (11), wherein the power transmission device (12) includes a first power transmission device (13) coupled to the speed-change transmission device (11), and a second power transmission device (14) to which the driving wheel (4) is coupled, and the first power transmission device (13) and the second power transmission device (14) are movably coupled to each other.
    Type: Application
    Filed: August 8, 2017
    Publication date: June 20, 2019
    Inventors: Masaki Nonaka, Koichi Ogawa, Takanori Ishii
  • Publication number: 20190086767
    Abstract: In a camera having an automatic opening/closing mechanism of an iris, there is a problem that the iris cannot be operated in a case where the iris has not been operated for a long period of time. A monitoring camera includes: a light receiving unit; an iris for adjusting an amount of light passing through the light receiving unit; an iris opening/closing unit; an imaging element for converting light having passed through the light receiving unit into a video signal; a light amount feedback opening/closing controlling unit for controlling the iris opening/closing unit so that the iris is opened or closed on the basis of a luminance of the video signal; and an opening/closing controlling unit for controlling the iris opening/closing unit so that the iris is opened or closed not on the basis of the luminance of the video signal but in a case where a predetermined condition is satisfied.
    Type: Application
    Filed: March 22, 2016
    Publication date: March 21, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akito TAKEYA, Takanori ISHII, Takuya MIWA
  • Publication number: 20190079838
    Abstract: An information processing system includes a plurality of control apparatuses communicably coupled to each other. A first control apparatus of the plurality of control apparatuses includes a first memory configured to store first instructions and a first processor configured to operate using standby power before a power-on selection is made. The first processor executes the first instructions causing a process including collecting first identification information of each of the plurality of control apparatuses other than the first control apparatus. The process includes storing the first identification information in the first memory. The process includes determining a role of the first control apparatus based on a comparison result derived by comparing second identification information of the first control apparatus with the first identification information.
    Type: Application
    Filed: September 6, 2018
    Publication date: March 14, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Tatsuya Shinozaki, TAKANORI ISHII, Keisuke Yamasaki
  • Publication number: 20190018784
    Abstract: A storing unit stores therein mapping management information indicating mappings between each of a plurality of divided regions created by dividing logical storage space on a storage apparatus and one of a plurality of identification numbers each representing a different write frequency. A control unit measures the write frequency of each of the plurality of divided regions and updates the mappings indicated by the mapping management information based on results of the write frequency measurement. Upon request for a data write to a write address included in a divided region after the update of the mappings, the control unit identifies an identification number associated with the divided region based on the mapping management information, appends the identified identification number to a write request for the write address, and transmits the write request with the identified identification number appended thereto to the storage apparatus.
    Type: Application
    Filed: July 3, 2018
    Publication date: January 17, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Takanori ISHII, Tomoka Aoki
  • Patent number: 9990284
    Abstract: A storage control device includes a first processor, a second processor, and transfer units for transferring data from the first processor to the second processor. The first processor receives a write request for writing first data from a first device and sequentially transmits the first data, additional data, and pieces of dummy data. A number of the pieces is same as a number of the transfer units. The first processor notifies the first device of completion of the writing upon receiving an acknowledgement for a last transmitted piece of dummy data. Each transfer unit includes a third processor. The third processor receives the additional data from a preceding processor, and transmits an acknowledgement to the preceding processor upon storing the received additional data. The third processor receives one piece of dummy data from the preceding processor, and transmits an acknowledgement to the preceding processor upon storing the one piece.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: June 5, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Yoshiharu Watanabe, Takanori Ishii, Tomoyuki Kanayama
  • Publication number: 20180091358
    Abstract: An information processing apparatus includes a communication apparatus and a different communication apparatus connected to the communication apparatus via a plurality of transmission paths. The communication apparatus includes a transmitting unit and a control unit. In response to designation of a transmission path targeted for diagnosis, selected amongst the transmission paths while the communication apparatus is in a state capable of data communication with the different communication apparatus using the transmission paths, the transmitting unit transmits a test signal to the targeted transmission path while the state capable of data communication with the different communication apparatus is maintained using remaining transmission paths of the transmission paths other than the targeted transmission path.
    Type: Application
    Filed: August 16, 2017
    Publication date: March 29, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Kazuko Sasaki, Tomoyuki Kanayama, Takanori Ishii, Yohei Nuno
  • Patent number: 9830293
    Abstract: An information processing apparatus includes: an interface unit that communicates with another device through a plurality of physical links; a setting unit that determines a value of a setting parameter for setting a signal transmission characteristic for each of the plurality of physical links by performing a negotiation with the other device and that outputs a plurality of determined values of the setting parameter, each of the plurality of determined values corresponding to one of the plurality of physical links; and a judgment unit that judges whether each of the plurality of determined values is correct or not by judging whether or not a difference between a maximum value and a minimum value among the plurality of determined values falls within a predetermined range.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: November 28, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Takanori Ishii, Kazuko Sakurai, Yohei Nuno, Tatsuya Shinozaki
  • Patent number: 9738348
    Abstract: A saddle type vehicle to improve the workability in fastening a frame and an engine together and thereby to enhance productivity. The saddle type vehicle includes a head pipe, a main frame extending rearwardly from the head pipe, and a seat rail located rearwardly of the main frame for supporting a seat. The main frame is fastened to the engine by fastening members being directed from an outer side toward an inner side in the vehicle widthwise direction. A knock pin is provided between the main frame and the engine, in a position in the vicinity of at least one of the fastening members.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: August 22, 2017
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Akihiro Yamashita, Jun Hariu, Takanori Ishii, Shunichi Nakajima, Daisuke Umikawa
  • Publication number: 20170046258
    Abstract: A storage control device includes a first processor, a second processor, and transfer units for transferring data from the first processor to the second processor. The first processor receives a write request for writing first data from a first device and sequentially transmits the first data, additional data, and pieces of dummy data. A number of the pieces is same as a number of the transfer units. The first processor notifies the first device of completion of the writing upon receiving an acknowledgement for a last transmitted piece of dummy data. Each transfer unit includes a third processor. The third processor receives the additional data from a preceding processor, and transmits an acknowledgement to the preceding processor upon storing the received additional data. The third processor receives one piece of dummy data from the preceding processor, and transmits an acknowledgement to the preceding processor upon storing the one piece.
    Type: Application
    Filed: July 5, 2016
    Publication date: February 16, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Yoshiharu WATANABE, Takanori ISHII, Tomoyuki Kanayama
  • Patent number: 9336089
    Abstract: A processing apparatus includes a first memory, a second memory, a capacitor, and a processor coupled to the first memory and the second memory. The processor is configured to cause power feeding from the capacitor, and execute a first processing to cause the first memory to hold data, after the power feeding is caused from the capacitor, cause a battery to start power feeding in at least one of a case where the power feeding from an external power source is not started after being halted and an output voltage of the capacitor has fallen below a first value, and a case where the power feeding from the external power source is not started after being halted and a first time period has elapsed, and execute a second processing to write the data from the first memory into the second memory during the power feeding from the battery.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: May 10, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Kentarou Yuasa, Takanori Ishii
  • Patent number: 9298239
    Abstract: There is provided a control device which includes a cache memory configured to temporarily store data, a nonvolatile memory configured to store a copy of the data stored in the cache memory, a battery configured to supply power to the cache memory in a case of a power failure, a data save processing unit configured to save data stored in a backup target region of the cache memory to the nonvolatile memory in the case of the power failure, and a charge control unit configured to charge the battery up to a target amount of charge which is determined on the basis of a size of the backup target region.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: March 29, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Takanori Ishii, Kentarou Yuasa, Shinnosuke Matsuda