Patents by Inventor Ryuji Yamada

Ryuji Yamada 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: 20240411075
    Abstract: Provided are an optical laminate in which, for example, in a case of being applied to a pancake lens-type virtual reality display apparatus, light leakage can be reduced by canceling out expression of phase difference, change in phase difference, and the like caused by molding into a curved surface; an optical lens including the optical laminate; and a virtual reality display apparatus using the optical lens. The optical laminate includes a first optically anisotropic layer containing a negative birefringent resin, and a specific layer selected from the group consisting of a third optically anisotropic layer which is formed by immobilizing a uniformly aligned liquid crystal compound and a cholesteric liquid crystal layer which is formed by immobilizing a helically aligned liquid crystal compound, in which the first optically anisotropic layer and the specific layer have a curved surface portion.
    Type: Application
    Filed: August 16, 2024
    Publication date: December 12, 2024
    Applicant: FUJIFILM Corporation
    Inventors: Naoyoshi YAMADA, Ryuji SANETO, Katsumi SASATA, Takehiro KASAHARA, Yohei HAMACHI
  • Patent number: 12166413
    Abstract: An integrated circuit for a power supply circuit, including: a first command value output circuit outputting a first command value to turn on a transistor of the power supply circuit for a first time period; an on signal output circuit outputting an on signal to turn on the transistor; a delay circuit delaying the on signal by a predetermined time period; a correction circuit correcting the first command value, to output a second command value to turn on the transistor for a second time period; and a driver circuit turning on and off the transistor based respectively on the delayed on-signal and the second command value. The correction circuit corrects the first command value based on the predetermined time period and a ratio between the second time period and another time period from when the transistor is turned off to when an inductor current of the power supply circuit reaches a predetermined value.
    Type: Grant
    Filed: July 28, 2022
    Date of Patent: December 10, 2024
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Ryuunosuke Araumi, Ryuji Yamada
  • Patent number: 12152519
    Abstract: A regeneration control apparatus for controlling, in an exhaust gas treatment apparatus of a diesel engine including a diesel oxidation catalyst (DOC) disposed in an exhaust passage of an internal combustion engine and a diesel particulate filter (DPF) disposed downstream of the DOC, execution of forced regeneration to remove an exhaust particulate matter (PM) which accumulates on the DPF through a temperature increase of the DPF, includes: a late-post injection amount determination part which determines a late-post injection amount. The late-post injection amount determination part is configured to determine an upper limit value of the late-post injection amount on the basis of an air excess ratio of exhaust gas flowing into the DOC obtained on the basis of a temperature index of the DOC.
    Type: Grant
    Filed: July 20, 2021
    Date of Patent: November 26, 2024
    Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.
    Inventors: Kazuki Nishizawa, Kazutoshi Nomura, Tomohide Yamada, Ryuji Kita, Mizuki Kanai
  • Publication number: 20240382066
    Abstract: An information processing apparatus (2000) detects an abnormal region (30) in each of a plurality of video frames (14) constituting video data (12) in which the inside of a body is captured. The information processing apparatus (2000) outputs output information related to the detected abnormal region (30). Herein, the information processing apparatus (2000) starts outputting of the output information when a detection score based on a proportion of the number of the video frames (14) in which the abnormal region (30) is detected becomes equal to or more than a first threshold value in a state where outputting of the output information is not being performed. Further, the information processing apparatus (2000) ends outputting of the output information 10 when the detection score becomes equal to or less than a second threshold value in a state where outputting of the output information is being performed.
    Type: Application
    Filed: July 30, 2024
    Publication date: November 21, 2024
    Applicants: NEC CORPORATION, NATIONAL CANCER CENTER
    Inventors: Ikuma TAKAHASHI, Maki SANO, Kimiyasu TAKOH, Motoyasu OKUTSU, Chiemi TANAKA, Masahiro SAIKOU, Hitoshi IMAOKA, Kenichi KAMIJO, Ryuji HAMAMOTO, Yutaka SAITO, Masayoshi YAMADA
  • Publication number: 20240382065
    Abstract: An information processing apparatus (2000) detects an abnormal region (30) in each of a plurality of video frames (14) constituting video data (12) in which the inside of a body is captured. The information processing apparatus (2000) outputs output information related to the detected abnormal region (30). Herein, the information processing apparatus (2000) starts outputting of the output information when a detection score based on a proportion of the number of the video frames (14) in which the abnormal region (30) is detected becomes equal to or more than a first threshold value in a state where outputting of the output information is not being performed. Further, the information processing apparatus (2000) ends outputting of the output information when the detection score becomes equal to or less than a second threshold value in a state where outputting of the output information is being performed.
    Type: Application
    Filed: July 30, 2024
    Publication date: November 21, 2024
    Applicants: NEC Corporation, NATIONAL CANCER CENTER
    Inventors: Ikuma TAKAHASHI, Maki SANO, Kimiyasu TAKOH, Motoyasu OKUTSU, Chiemi TANAKA, Masahiro SAIKOU, Hitoshi IMAOKA, Kenichi KAMIJO, Ryuji HAMAMOTO, Yutaka SAITO, Masayoshi YAMADA
  • Publication number: 20240382064
    Abstract: An information processing apparatus (2000) detects an abnormal region (30) in each of a plurality of video frames (14) constituting video data (12) in which the inside of a body is captured. The information processing apparatus (2000) outputs output information related to the detected abnormal region (30). Herein, the information processing apparatus (2000) starts outputting of the output information when a detection score based on a proportion of the number of the video frames (14) in which the abnormal region (30) is detected becomes equal to or more than a first threshold value in a state where outputting of the output information is not being performed. Further, the information processing apparatus (2000) ends outputting of the output information when the detection score becomes equal to or less than a second threshold value in a state where outputting of the output information is being performed.
    Type: Application
    Filed: July 30, 2024
    Publication date: November 21, 2024
    Applicants: NEC CORPORATION, NATIONAL CANCER CENTER
    Inventors: Ikuma TAKAHASHI, Maki Sano, Kimiyasu Tokoh, Motoyasu Okutsu, Chiemi Tanaka, Masahiro Saikou, Hitoshi Imaoka, Kenichi Kamijo, Ryuji Hamamoto, Yutaka Saito, Masayoshi Yamada
  • Publication number: 20240333132
    Abstract: A switching control circuit including: a command value output circuit that respectively outputs a command value indicating a first time period, and command values indicating second and third time periods, in first and second load states; a first driver circuit that, in the first load state, turns on a first transistor after a first inductor current reaches a first value, and subsequently turns off the first transistor when the first time period has elapsed; and a second driver circuit that, in the second load state, turns on a second transistor when a second inductor current reaches a second value, and subsequently turns off the second transistor when the third time period has elapsed. The first driver circuit, in the second load state, turns on the first transistor when the first inductor current reaches the first value, and subsequently turns off the first transistor when the second time period has elapsed.
    Type: Application
    Filed: January 25, 2024
    Publication date: October 3, 2024
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventor: Ryuji YAMADA
  • Patent number: 12081116
    Abstract: A switching control circuit for a power supply circuit, including: a first command value output circuit outputting a first command value; a correction circuit correcting the first command value, to output a second command value; a first timer circuit measuring a first time period starting from a first timing at which a transistor of the power supply circuit is turned on; and a driving signal output circuit outputting a driving signal to turn on the transistor in response to an inductor current of the power supply circuit reaching a predetermined value and the first time period having elapsed since the first timing, and outputting the driving signal to turn off the transistor based on the second command value. The correction circuit causes an on time period of the transistor to increase, when the first time period has elapsed since the first timing, after the inductor current reaches the predetermined value.
    Type: Grant
    Filed: July 29, 2022
    Date of Patent: September 3, 2024
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Ryuji Yamada, Ryuunosuke Araumi
  • Patent number: 12075969
    Abstract: An information processing apparatus (2000) detects an abnormal region (30) in each of a plurality of video frames (14) constituting video data (12) in which the inside of a body is captured. The information processing apparatus (2000) outputs output information related to the detected abnormal region (30). Herein, the information processing apparatus (2000) starts outputting of the output information when a detection score based on a proportion of the number of the video frames (14) in which the abnormal region (30) is detected becomes equal to or more than a first threshold value in a state where outputting of the output information is not being performed. Further, the information processing apparatus (2000) ends outputting of the output information when the detection score becomes equal to or less than a second threshold value in a state where outputting of the output information is being performed.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: September 3, 2024
    Assignees: NEC CORPORATION, NATIONAL CANCER CENTER
    Inventors: Ikuma Takahashi, Maki Sano, Kimiyasu Takoh, Motoyasu Okutsu, Chiemi Tanaka, Masahiro Saikou, Hitoshi Imaoka, Kenichi Kamijo, Ryuji Hamamoto, Yutaka Saito, Masayoshi Yamada
  • Patent number: 12051964
    Abstract: A current detection circuit configured to detect a resonant current of a power supply circuit. The power supply circuit includes a resonant circuit that has an inductor and a first capacitor having a first end and a second end. The current detection circuit includes a second capacitor having a first end and a second end, and a non-linear circuit provided between the second end of the second capacitor and the second end of the first capacitor. The first end of the second capacitor is coupled to the first end of the first capacitor.
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: July 30, 2024
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Ryuunosuke Araumi, Ryuji Yamada
  • Publication number: 20240243658
    Abstract: A current detection circuit for a power supply circuit configured to generate an output voltage from an input voltage thereof, the power supply circuit including an inductor configured to receive the input voltage, a transistor configured to control an inductor current flowing through the inductor, and a diode coupled to a first node that is a node at which the inductor and the transistor are coupled. The current detection circuit is configured to detect the inductor current, and includes: a first capacitor coupled to the first node; and a second capacitor provided between the first capacitor and a ground, the second capacitor being coupled in series with the first capacitor.
    Type: Application
    Filed: November 28, 2023
    Publication date: July 18, 2024
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventor: Ryuji YAMADA
  • Publication number: 20240146184
    Abstract: A switching control circuit for a power supply circuit including first and second inductors, and first and second transistors controlling first and second inductor currents flowing through the first and second inductors, respectively. The switching control circuit includes: a detection circuit detecting a switching period of the first transistor and a time difference between first and second timings, at which the first and second inductor currents respectively reach first and second predetermined values; an error output circuit outputting an error between a predetermined ratio and a ratio of the time difference to the switching period; and a driving signal output circuit configured to output a driving signal to turn on the second transistor, after the second inductor current reaches the second predetermined value, and to turn off the second transistor, in response to a second time period according to the first time period and the error having elapsed.
    Type: Application
    Filed: August 24, 2023
    Publication date: May 2, 2024
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventor: Ryuji YAMADA
  • Patent number: 11965650
    Abstract: A photoconversion device includes a first wavelength converter and a long-pass filter. The first wavelength converter receives excitation light from an output portion and emits fluorescence having a longer wavelength than the excitation light. The long-pass filter transmits the fluorescence emitted by the first wavelength converter and reflects the excitation light transmitted through or reflected from the first wavelength converter to enter the first wavelength converter.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: April 23, 2024
    Assignee: KYOCERA CORPORATION
    Inventors: Noritaka Niino, Ryuji Yamada
  • Publication number: 20240072648
    Abstract: A switching control circuit for a power factor correction circuit configured to generate an output voltage from an alternating current (AC) voltage, the power factor correction circuit including an inductor configured to receive a rectified voltage corresponding to the AC voltage, and a transistor configured to control an inductor current flowing through the inductor. The switching control circuit is configured to control switching of the transistor. The switching control circuit includes: a driving signal output circuit configured to, when a peak value of the inductor current in a half cycle of the AC voltage is smaller than and greater than a first predetermined value, output a driving signal to operate the power factor correction circuit in a critical mode and in a continuous mode, respectively; and a driver circuit configured to drive the transistor, in response to the driving signal.
    Type: Application
    Filed: July 24, 2023
    Publication date: February 29, 2024
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventor: Ryuji YAMADA
  • Patent number: 11876441
    Abstract: A switching control circuit controls switching of a switching device, which controls a resonance current of a resonant converter, with a frequency corresponding to an output voltage of the resonant converter. The switching control circuit includes a detection circuit configured to detect a difference between a first timing at which the switching device is turned on and a second timing at which a polarity of the resonance current reverses, and a signal output circuit configured to output a driving signal with a preset minimum frequency, responsive to the difference becoming so small as to satisfy a predetermined condition.
    Type: Grant
    Filed: January 26, 2022
    Date of Patent: January 16, 2024
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Ryuunosuke Araumi, Ryuji Yamada
  • Publication number: 20230313974
    Abstract: A photoconversion device includes a first wavelength converter and a long-pass filter. The first wavelength converter receives excitation light from an output portion and emits fluorescence having a longer wavelength than the excitation light. The long-pass filter transmits the fluorescence emitted by the first wavelength converter and reflects the excitation light transmitted through or reflected from the first wavelength converter to enter the first wavelength converter.
    Type: Application
    Filed: March 31, 2021
    Publication date: October 5, 2023
    Applicant: KYOCERA Corporation
    Inventors: Noritaka NIINO, Ryuji YAMADA
  • Publication number: 20230299666
    Abstract: A switching control circuit for a power supply circuit that includes an inductor configured to receive a rectified voltage corresponding to an alternating current (AC) voltage, and a transistor configured to control a current flowing through the inductor, the power supply circuit generating an output voltage from the AC voltage, the switching control circuit being configured to switch the transistor. The switching control circuit comprises: a signal output circuit configured to output a signal to turn on the transistor, after lapse of a first time period since the inductor current reaches a first predetermined value after the transistor is turned off, the first time period corresponding to a conduction period during which a parasitic diode of the transistor conducts; and a driver circuit configured to turn on the transistor based on the signal, and turn off the transistor, based on a feedback voltage corresponding to the output voltage.
    Type: Application
    Filed: February 24, 2023
    Publication date: September 21, 2023
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Ryuunosuke ARAUMI, Ryuji YAMADA
  • Patent number: 11764667
    Abstract: A switching control circuit for a power supply circuit that generates an output voltage from an AC voltage. The power supply circuit includes a rectifier circuit rectifying the AC voltage, an inductor receiving the rectified AC voltage, and a transistor controlling an inductor current flowing through the inductor. The switching control circuit controls switching of the transistor, based on the inductor current and the output voltage. The switching control circuit includes a target value output circuit that outputs a target value of a peak value of the inductor current for shaping a waveform of the peak value so as to be similar to a waveform of the rectified voltage, and a drive signal output circuit that outputs a drive signal to turn on the transistor upon the inductor current falling below a predetermined value and turn off the transistor upon the peak value of the inductor current reaching the target value.
    Type: Grant
    Filed: October 28, 2021
    Date of Patent: September 19, 2023
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Ryuji Yamada, Ryuunosuke Araumi
  • Patent number: 11742746
    Abstract: A switching control circuit for controlling a power supply circuit that includes an inductor receiving a rectified voltage corresponding to an AC voltage, and a transistor controlling an inductor current flowing through the inductor. The switching control circuit controls switching of the transistor, and includes an output circuit, a processing circuit and a drive signal output circuit. The output circuit sequentially receives a first voltage, which fluctuates at a frequency twice a frequency of the AC voltage, and outputs, as a second voltage, the received first voltage after a delay of a predetermined period of time. The processing circuit processes the first voltage based on a value corresponding to the second voltage, to remove a ripple component generated in an output voltage and contained in the first voltage. The drive signal output circuit outputs a drive signal for driving the transistor, in response to a processing result of the processing circuit.
    Type: Grant
    Filed: October 26, 2021
    Date of Patent: August 29, 2023
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Ryuji Yamada
  • Patent number: 11705814
    Abstract: A switching control circuit for controlling an LLC converter that includes a first switching device, a first free-wheeling diode connected in parallel with the first switching device, a second switching device connected in series with the first switching device and the first free-wheeling diode, and a second free-wheeling diode connected in parallel with the second switching device. The switching control circuit controls switching of the first and second switching devices. The switching control circuit includes a determination circuit determining whether an operation mode of the LLC converter is a first mode or a second mode based on the resonant current of the LLC converter, and a drive signal output circuit outputting first and second drive signals for respectively switching the first and second switching devices based on the determined operation mode, to thereby prevent a shoot-through current from flowing through the first switching device or the second switching device.
    Type: Grant
    Filed: March 25, 2021
    Date of Patent: July 18, 2023
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Ryuunosuke Araumi, Ryuji Yamada