Patents by Inventor Tatsuya Tsuzuki

Tatsuya Tsuzuki 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: 20240151278
    Abstract: This clutch control device includes a clutch apparatus configured to connect and disconnect power transmission between a prime mover and an output target, a clutch actuator configured to output a driving force for actuating the clutch apparatus, a control unit configured to drive the clutch actuator, and an operating force transmission mechanism configured to transmit an operating force of a driver with respect to a clutch operator to the clutch apparatus, an operating force sensor configured to detect the operating force of the driver is provided in the operating force transmission mechanism, and the control unit drives the clutch actuator according to a detection value of the operating force sensor.
    Type: Application
    Filed: March 15, 2022
    Publication date: May 9, 2024
    Inventors: Junya Ono, Yoshiaki Tsukada, Takashi Ozeki, Koichi Furusato, Yuma Kaibe, Ryohei Tsuzuki, Yasushi Fujimoto, Tatsuya Ryuzaki
  • Publication number: 20230388040
    Abstract: A transmission apparatus includes a signal power detector configured to detect signal power of a wavelength-multiplexed optical signal to be transmitted to a transmission line, a variable optical attenuator configured to attenuate the wavelength-multiplexed optical signal, and a processor configured to control an attenuation amount of the variable optical attenuator according to the signal power and whether a Raman amplifier in which pumping light is inputted to the transmission line exists.
    Type: Application
    Filed: February 17, 2023
    Publication date: November 30, 2023
    Applicant: Fujitsu Limited
    Inventors: XIANG ZHANG, ATSUSHI KODAMA, Tatsuya TSUZUKI, Kyosuke SONE
  • Publication number: 20230239050
    Abstract: An optical wavelength multiplexing transmission device includes: a demultiplexer configured to demultiplex a wavelength multiplexing signal for each wavelength band from a multiplexed signal that includes wavelength multiplexing signals in a plurality of the wavelength bands; a processor configured to detect an optical power value of each wavelength multiplexing signal for each wavelength band; calculate a compensation amount used to compensate a tilt of the wavelength multiplexing signal, by using the optical power value and a predetermined calculation expression; and compensate the tilt of the wavelength multiplexing signal, based on the compensation amount; and a multiplexer configured to multiplex each wavelength multiplexing signal compensated by the processor and output the wavelength multiplexing signal to a transmission line.
    Type: Application
    Filed: November 3, 2022
    Publication date: July 27, 2023
    Applicant: Fujitsu Limited
    Inventors: Shigeru ISHII, Tatsuya Tsuzuki, Takehiro Fujita, Tomoaki Takeyama
  • Patent number: 11711160
    Abstract: A transmission device including: a signal power detection circuit that detects signal power of a wavelength-division-multiplexed optical signal to be transmitted to a transmission line into which pumping light is inputted from a Raman amplifier; a variable optical attenuator that attenuates the wavelength-division-multiplexed optical signal; and a control circuit that reduces an attenuation amount of the variable optical attenuator depending on an increase in the signal power.
    Type: Grant
    Filed: December 8, 2021
    Date of Patent: July 25, 2023
    Assignee: FUJITSU LIMITED
    Inventors: Xiang Zhang, Kyosuke Sone, Tatsuya Tsuzuki
  • Publication number: 20230199350
    Abstract: An optical switching device including: an input unit to which multichannel light beams are redundantly input; a channel tunable optical filter that confirms, from the received multichannel light beams, whether correct input of a channel for an output destination is included; and an optical switch that outputs, to an optical transfer device which is the output destination, any one of the multichannel light beams that includes the channel which has been correctly input.
    Type: Application
    Filed: February 13, 2023
    Publication date: June 22, 2023
    Applicant: Fujitsu Limited
    Inventors: Tatsuya TSUZUKI, Shigeru ISHII, Takehiro FUJITA
  • Patent number: 11515960
    Abstract: A transmission device includes a wavelength multiplexer that wavelength-multiplexes a plurality of optical signals having different wavelengths to generate a wavelength-multiplexed optical signal, an amplifier that outputs the wavelength-multiplexed optical signal to a transmission path, and a first processor that allocates wavelength bands to the plurality of optical signals to be wavelength-multiplexed into the wavelength-multiplexed optical signal and controls power of the wavelength-multiplexed optical signal in accordance with the wavelength bands allocated to the plurality of optical signals.
    Type: Grant
    Filed: March 16, 2021
    Date of Patent: November 29, 2022
    Assignee: FUJITSU LIMITED
    Inventor: Tatsuya Tsuzuki
  • Publication number: 20220303038
    Abstract: A transmission device including: a signal power detection circuit that detects signal power of a wavelength-division-multiplexed optical signal to be transmitted to a transmission line into which pumping light is inputted from a Raman amplifier; a variable optical attenuator that attenuates the wavelength-division-multiplexed optical signal; and a control circuit that reduces an attenuation amount of the variable optical attenuator depending on an increase in the signal power.
    Type: Application
    Filed: December 8, 2021
    Publication date: September 22, 2022
    Applicant: FUJITSU LIMITED
    Inventors: XIANG ZHANG, Kyosuke Sone, Tatsuya Tsuzuki
  • Patent number: 11384013
    Abstract: An automotive laminated glass includes a thermoplastic interlayer film, a curved first glass sheet, and a curved second glass sheet. The thermoplastic interlayer film is disposed between the first and second glass sheets. The first glass sheet is a 0.7- to 3-mm thick non-chemically strengthened glass sheet including a convex-side first main surface and a concave-side second main surface facing the thermoplastic interlayer film. The second glass sheet is an ion-exchanged, 0.3- to 1.5-mm thick chemically strengthened glass sheet including a convex-side third main surface facing the thermoplastic interlayer film and a concave-side fourth main surface. The second glass sheet is thinner than the first glass sheet, and is adjusted to have a curvature equal to the curvature of the first glass sheet. A compressive stress layer on the concave-side fourth main surface is thicker than a compressive stress layer on the convex-side third main surface.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: July 12, 2022
    Assignee: CENTRAL GLASS COMPANY, LIMITED
    Inventors: Naoki Mitamura, Tatsuya Tsuzuki, Hiroki Nakamura, Naoya Hirata
  • Patent number: 11270386
    Abstract: It is desirable to provide a technology for enabling to make a reply to a received message by simple operation. There is provided an information processing device including an output control unit that, in a case where a received message has been obtained through a communication unit, controls display of first and second candidates of a transmission message, and sets the first candidate as a candidate in a selected state, in which: in a case where first pressing force has been detected by a first pressure sensor, the output control unit switches the candidate in the selected state from the first candidate to the second candidate; and in a case where second pressing force has been detected by a second pressure sensor, the output control unit controls the communication unit in such a manner that the candidate in the selected state is transmitted as the transmission message.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: March 8, 2022
    Assignee: SONY CORPORATION
    Inventors: Masaharu Asano, Yosuke Kiyama, Akinori Yamada, Ryo Yamamoto, Takashi Hasegawa, Takuya Goda, Tatsuya Tsuzuki, Keita Hibi, Kazuhiro Ishida, Keishi Tsuchiya
  • Publication number: 20210226720
    Abstract: A transmission device includes a wavelength multiplexer that wavelength-multiplexes a plurality of optical signals having different wavelengths to generate a wavelength-multiplexed optical signal, an amplifier that outputs the wavelength-multiplexed optical signal to a transmission path, and a first processor that allocates wavelength bands to the plurality of optical signals to be wavelength-multiplexed into the wavelength-multiplexed optical signal and controls power of the wavelength-multiplexed optical signal in accordance with the wavelength bands allocated to the plurality of optical signals.
    Type: Application
    Filed: March 16, 2021
    Publication date: July 22, 2021
    Applicant: FUJITSU LIMITED
    Inventor: Tatsuya Tsuzuki
  • Patent number: 11018763
    Abstract: A network system includes a plurality of transmission devices, each of which being provided with a wavelength selective switch including a wavelength filter, configured to transmit an optical signal for each channel; and a management device configured to manage the plurality of transmission devices. The wavelength selective switch configured to enable band setting that widens a transmission band of an optical signal of a predetermined channel to the wavelength filter of an adjacent channel. The management device is further configured to calculate an OSNR of the optical signal based on power loss, calculate a bandwidth of the optical signal according to narrowing due to the wavelength filter, determine whether or not the OSNR and the bandwidth respectively satisfies a condition of transmission quality of the optical signal, and decide whether or not to cause the wavelength selective switch to perform the band setting based on a result of the determination.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: May 25, 2021
    Assignee: FUJITSU LIMITED
    Inventors: Tatsuya Tsuzuki, Shinji Komiya, Tomoaki Takeyama
  • Patent number: 10979168
    Abstract: A transmission device includes a wavelength multiplexer that wavelength-multiplexes a plurality of optical signals having different wavelengths to generate a wavelength-multiplexed optical signal, an amplifier that outputs the wavelength-multiplexed optical signal to a transmission path, and a first processor that allocates wavelength bands to the plurality of optical signals to be wavelength-multiplexed into the wavelength-multiplexed optical signal and controls power of the wavelength-multiplexed optical signal in accordance with the wavelength bands allocated to the plurality of optical signals.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: April 13, 2021
    Assignee: FUJITSU LIMITED
    Inventor: Tatsuya Tsuzuki
  • Patent number: 10960648
    Abstract: An automotive laminated glass includes a thermoplastic interlayer film, a curved first glass sheet, and a curved second glass sheet. The thermoplastic interlayer film is disposed between the first and second glass sheets. The first glass sheet is a 0.7- to 3-mm thick non-chemically strengthened glass sheet including a convex-side first main surface and a concave-side second main surface facing the thermoplastic interlayer film. The second glass sheet is an ion-exchanged, 0.3- to 1.5-mm thick chemically strengthened glass sheet including a convex-side third main surface facing the thermoplastic interlayer film and a concave-side fourth main surface. The second glass sheet is thinner than the first glass sheet. The convex-side third main surface has a compressive stress layer thicker than that on the concave-side fourth main surface, and the second glass sheet is adjusted to fit the curvature of the first glass sheet.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: March 30, 2021
    Assignee: CENTRAL GLASS COMPANY, LIMITED
    Inventors: Naoki Mitamura, Tatsuya Tsuzuki, Hiroki Nakamura, Naoya Hirata
  • Publication number: 20210067245
    Abstract: A network system includes a plurality of transmission devices, each of which being provided with a wavelength selective switch including a wavelength filter, configured to transmit an optical signal for each channel; and a management device configured to manage the plurality of transmission devices. The wavelength selective switch configured to enable band setting that widens a transmission band of an optical signal of a predetermined channel to the wavelength filter of an adjacent channel. The management device is further configured to calculate an OSNR of the optical signal based on power loss, calculate a bandwidth of the optical signal according to narrowing due to the wavelength filter, determine whether or not the OSNR and the bandwidth respectively satisfies a condition of transmission quality of the optical signal, and decide whether or not to cause the wavelength selective switch to perform the band setting based on a result of the determination.
    Type: Application
    Filed: August 26, 2020
    Publication date: March 4, 2021
    Applicant: FUJITSU LIMITED
    Inventors: Tatsuya Tsuzuki, Shinji KOMIYA, Tomoaki Takeyama
  • Publication number: 20200402180
    Abstract: It is desirable to provide a technology for enabling to make a reply to a received message by simple operation. There is provided an information processing device including an output control unit that, in a case where a received message has been obtained through a communication unit, controls display of first and second candidates of a transmission message, and sets the first candidate as a candidate in a selected state, in which: in a case where first pressing force has been detected by a first pressure sensor, the output control unit switches the candidate in the selected state from the first candidate to the second candidate; and in a case where second pressing force has been detected by a second pressure sensor, the output control unit controls the communication unit in such a manner that the candidate in the selected state is transmitted as the transmission message.
    Type: Application
    Filed: November 16, 2018
    Publication date: December 24, 2020
    Applicant: Sony Corporation
    Inventors: Masaharu ASANO, Yosuke KIYAMA, Akinori YAMADA, Ryo YAMAMOTO, Takashi HASEGAWA, Takuya GODA, Tatsuya TSUZUKI, Keita HIBI, Kazuhiro ISHIDA, Keishi TSUCHIYA
  • Publication number: 20200122437
    Abstract: An automotive laminated glass includes a thermoplastic interlayer film, a curved first glass sheet, and a curved second glass sheet. The thermoplastic interlayer film is disposed between the first and second glass sheets. The first glass sheet is a 0.7- to 3-mm thick non-chemically strengthened glass sheet including a convex-side first main surface and a concave-side second main surface facing the thermoplastic interlayer film. The second glass sheet is an ion-exchanged, 0.3- to 1.5-mm thick chemically strengthened glass sheet including a convex-side third main surface facing the thermoplastic interlayer film and a concave-side fourth main surface. The second glass sheet is thinner than the first glass sheet. The convex-side third main surface has a compressive stress layer thicker than that on the concave-side fourth main surface, and the second glass sheet is adjusted to fit the curvature of the first glass sheet.
    Type: Application
    Filed: November 14, 2017
    Publication date: April 23, 2020
    Applicant: CENTRAL GLASS COMPANY, LIMITED
    Inventors: Naoki Mitamura, Tatsuya Tsuzuki, Hiroki Nakamura, Naoya Hirata
  • Publication number: 20200067624
    Abstract: A transmission device includes a wavelength multiplexer that wavelength-multiplexes a plurality of optical signals having different wavelengths to generate a wavelength-multiplexed optical signal, an amplifier that outputs the wavelength-multiplexed optical signal to a transmission path, and a first processor that allocates wavelength bands to the plurality of optical signals to be wavelength-multiplexed into the wavelength-multiplexed optical signal and controls power of the wavelength-multiplexed optical signal in accordance with the wavelength bands allocated to the plurality of optical signals.
    Type: Application
    Filed: August 15, 2019
    Publication date: February 27, 2020
    Applicant: FUJITSU LIMITED
    Inventor: Tatsuya Tsuzuki
  • Patent number: 10541749
    Abstract: A transmission apparatus includes a demultiplexer configured to demultiplex a multiplexed signal including wavelength multiplexed signals having individual wavelength bands into a wavelength multiplexed signal for each of the wavelength bands, a detector configured to detect a power value of each of the wavelength multiplexed signals for each of the wavelength bands, first compensators configured to compensate for a tilt in the wavelength multiplexed signal based on the power value for each of the wavelength bands, second compensators configured to compensate for a power of the wavelength multiplexed signal for each of the wavelength bands so as to reduce a power difference among wavelength multiplexed signals after the tilt compensation based on the power value for each of the wavelength bands, and a multiplexer configured to multiplex each of the wavelength multiplexed signals after the power compensation and output a multiplexed signal.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: January 21, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Shigeru Ishii, Hiroki Oi, Takehiro Fujita, Tatsuya Tsuzuki
  • Publication number: 20190358935
    Abstract: An automotive laminated glass includes a thermoplastic interlayer film, a curved first glass sheet, and a curved second glass sheet. The thermoplastic interlayer film is disposed between the first and second glass sheets. The first glass sheet is a 0.7- to 3-mm thick non-chemically strengthened glass sheet including a convex-side first main surface and a concave-side second main surface facing the thermoplastic interlayer film. The second glass sheet is an ion-exchanged, 0.3- to 1.5-mm thick chemically strengthened glass sheet including a convex-side third main surface facing the thermoplastic interlayer film and a concave-side fourth main surface. The second glass sheet is thinner than the first glass sheet, and is adjusted to have a curvature equal to the curvature of the first glass sheet. A compressive stress layer on the concave-side fourth main surface is thicker than a compressive stress layer on the convex-side third main surface.
    Type: Application
    Filed: November 14, 2017
    Publication date: November 28, 2019
    Applicant: CENTRAL GLASS COMPANY, LIMITED
    Inventors: Naoki Mitamura, Tatsuya Tsuzuki, Hiroki Nakamura, Naoya Hirata
  • Publication number: 20190312641
    Abstract: A transmission apparatus includes a demultiplexer configured to demultiplex a multiplexed signal including wavelength multiplexed signals having individual wavelength bands into a wavelength multiplexed signal for each of the wavelength bands, a detector configured to detect a power value of each of the wavelength multiplexed signals for each of the wavelength bands, first compensators configured to compensate for a tilt in the wavelength multiplexed signal based on the power value for each of the wavelength bands, second compensators configured to compensate for a power of the wavelength multiplexed signal for each of the wavelength bands so as to reduce a power difference among wavelength multiplexed signals after the tilt compensation based on the power value for each of the wavelength bands, and a multiplexer configured to multiplex each of the wavelength multiplexed signals after the power compensation and output a multiplexed signal.
    Type: Application
    Filed: March 19, 2019
    Publication date: October 10, 2019
    Applicant: FUJITSU LIMITED
    Inventors: Shigeru ISHII, Hiroki Oi, Takehiro Fujita, Tatsuya Tsuzuki