Patents by Inventor Ryo Takagi

Ryo Takagi 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: 12379262
    Abstract: A system for evaluating a treatment device capable of radiating ultrasound for cauterizing human tissue, the system including: simulated tissue having a property that hue changes according to temperature in a particular temperature-sensitive area and simulating temperature change of human tissue at time of the human tissue receiving the ultrasound from the treatment device, the simulated tissue having an insertion hole where the treatment device can be arranged; a light source radiating planar light from the whole circumference, the light source being arranged surrounding the simulated tissue; an image taking device taking cross-sectional color images of light irradiation surfaces of the simulated tissue; and movement mechanisms causing the light source and the image taking device to relatively move in a photographing axis direction of the image taking device relative to the simulated tissue; and a movement mechanism control/information processing unit controlling the movement mechanism.
    Type: Grant
    Filed: April 19, 2022
    Date of Patent: August 5, 2025
    Assignees: National Institute of Advanced Industrial Science and Technology, Otsuka Medical Devices Co., Ltd.
    Inventors: Ryo Takagi, Koji Inui
  • Publication number: 20250016898
    Abstract: A light-emitting element driving device includes an error amplifier configured to output a voltage corresponding to the difference between a voltage corresponding to the current flowing through a light-emitting element and a reference voltage, and to switch between an operating state and a non-operating state according to a control signal; a driver configured to drive, based on the output voltage of the error amplifier, a switching element in a voltage feeder configured to feed a voltage to the light-emitting element; and a suppressor configured, when the error amplifier switches from the non-operating state to the operating state, to suppress a rise in the output voltage of the error amplifier.
    Type: Application
    Filed: September 20, 2024
    Publication date: January 9, 2025
    Inventors: Ryo TAKAGI, Akira AOKI
  • Publication number: 20240333162
    Abstract: This light-emitting element drive control device (100) comprises: a drive logic unit (113) which performs a drive control of a switch output stage (N1, D1, L1) for dropping an input voltage (VIN) to an output voltage (VOUT) and supplying a light-emitting element therewith; a charge-pump power supply unit (?) which generates a step-up voltage (CP) higher than the input voltage (VIN); and a current detecting comparator (114) which receives a supply of the step-up voltage (CP) and the output voltage (VOUT) as power supply voltages, and generates control signals (SET, RST) for the drive logic unit (113) by directly comparing a current detection signal (Vsns) corresponding to an inductor current (IL) of the switch output stage with a peak detection value (Vsns_pk) and a bottom detection value (Vsns_bt).
    Type: Application
    Filed: June 14, 2024
    Publication date: October 3, 2024
    Inventors: Akira AOKI, Ryo TAKAGI
  • Patent number: 12096530
    Abstract: A power control device is configured to control a power circuit that generates an output voltage based on an input supply voltage relative to a ground, and includes a first terminal fed with a common voltage, a second terminal connectable to an application terminal for the ground, a P-type substrate fed with the common voltage, a MOS transistor connected between the first and second terminals and configured with an N-channel MOSFET, and an internal reference voltage generating circuit configured to generate, based on the input supply voltage, an internal reference voltage relative to the common voltage. When the input supply voltage is turned on, the MOS transistor is turned on and thereby the first and second terminals are short-circuited together.
    Type: Grant
    Filed: December 20, 2021
    Date of Patent: September 17, 2024
    Inventors: Daisuke Kanbara, Akira Aoki, Ryo Takagi
  • Patent number: 12047004
    Abstract: This light-emitting element drive control device (100) comprises: a drive logic unit (113) which performs a drive control of a switch output stage (N1, D1, L1) for dropping an input voltage (VIN) to an output voltage (VOUT) and supplying a light-emitting element therewith; a charge-pump power supply unit (?) which generates a step-up voltage (CP) higher than the input voltage (VIN); and a current detecting comparator (114) which receives a supply of the step-up voltage (CP) and the output voltage (VOUT) as power supply voltages, and generates control signals (SET, RST) for the drive logic unit (113) by directly comparing a current detection signal (Vsns) corresponding to an inductor current (IL) of the switch output stage with a peak detection value (Vsns_pk) and a bottom detection value (Vsns_bt).
    Type: Grant
    Filed: July 24, 2023
    Date of Patent: July 23, 2024
    Inventors: Akira Aoki, Ryo Takagi
  • Publication number: 20240237168
    Abstract: A level shifter includes a current output amplifier configured to output a first output current and a second output current through first and second output terminals thereof, respectively, a first resistor configured to be connected between each of an inverted input terminal and the first output terminal of the current output amplifier and an application terminal of a ground potential, and a second resistor configured to be connected between the second output terminal of the current output amplifier and an application terminal of a negative potential lower than the ground potential. A first analog signal referenced to the ground potential is accepted at a non-inverted input terminal of the current output amplifier, and a second analog signal referenced to the negative potential is outputted through one terminal of the second resistor.
    Type: Application
    Filed: December 29, 2023
    Publication date: July 11, 2024
    Inventors: Akira AOKI, Ryo TAKAGI
  • Publication number: 20240210256
    Abstract: A system for evaluating a treatment device capable of radiating ultrasound for cauterizing human tissue, the system including: simulated tissue having a property that hue changes according to temperature in a particular temperature-sensitive area and simulating temperature change of human tissue at time of the human tissue receiving the ultrasound from the treatment device, the simulated tissue having an insertion hole where the treatment device can be arranged; a light source radiating planar light from the whole circumference, the light source being arranged surrounding the simulated tissue; an image taking device taking cross-sectional color images of light irradiation surfaces of the simulated tissue; and movement mechanisms causing the light source and the image taking device to relatively move in a photographing axis direction of the image taking device relative to the simulated tissue; and a movement mechanism control/information processing unit controlling the movement mechanism.
    Type: Application
    Filed: April 19, 2022
    Publication date: June 27, 2024
    Inventors: Ryo Takagi, Koji Inui
  • Publication number: 20240138039
    Abstract: A level shifter includes a current output amplifier configured to output a first output current and a second output current through first and second output terminals thereof, respectively, a first resistor configured to be connected between each of an inverted input terminal and the first output terminal of the current output amplifier and an application terminal of a ground potential, and a second resistor configured to be connected between the second output terminal of the current output amplifier and an application terminal of a negative potential lower than the ground potential. A first analog signal referenced to the ground potential is accepted at a non-inverted input terminal of the current output amplifier, and a second analog signal referenced to the negative potential is outputted through one terminal of the second resistor.
    Type: Application
    Filed: December 29, 2023
    Publication date: April 25, 2024
    Inventors: Akira AOKI, Ryo TAKAGI
  • Publication number: 20240130018
    Abstract: For example, a semiconductor device disclosed in the present description is configured to function as a component of a switching power supply, and includes: a current sense signal generator configured to generate a current sense signal by amplifying a sense voltage corresponding to the output current of the switching power supply; a voltage sense signal generator configured to generate a voltage sense signal corresponding to the output voltage of the switching power supply; a selector configured to output as a selected sense signal one of the current sense signal and the voltage sense signal according to a mode switch signal; and an output feedback controller configured to control the driving of the switching power supply based on the selected sense signal.
    Type: Application
    Filed: December 27, 2023
    Publication date: April 18, 2024
    Inventors: Akira AOKI, Ryo TAKAGI
  • Patent number: 11871490
    Abstract: A lighting control device switches an input voltage to generate an output voltage and supplies a driving current based on the output voltage to a lighting unit. A raw control signal is generated to specify a lighting period and an extinction period alternately, and a corrected control signal is generated by correcting the raw control signal based on the current through the lighting unit. A switching controller performs the switching of the input voltage during the lighting period specified by the corrected control signal and suspends the switching of the input voltage during the extinction period specified by the corrected control signal.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: January 9, 2024
    Assignee: Rohm Co., Ltd.
    Inventors: Akira Aoki, Ryo Takagi
  • Publication number: 20230422375
    Abstract: A power control device is configured to control a power circuit that generates an output voltage based on an input supply voltage relative to a ground, and includes a first terminal fed with a common voltage, a second terminal connectable to an application terminal for the ground, a P-type substrate fed with the common voltage, a MOS transistor connected between the first and second terminals and configured with an N-channel MOSFET, and an internal reference voltage generating circuit configured to generate, based on the input supply voltage, an internal reference voltage relative to the common voltage. When the input supply voltage is turned on, the MOS transistor is turned on and thereby the first and second terminals are short-circuited together.
    Type: Application
    Filed: December 20, 2021
    Publication date: December 28, 2023
    Inventors: Daisuke KANBARA, Akira AOKI, Ryo TAKAGI
  • Patent number: 11849787
    Abstract: An object of the present invention is to provide a glove which, while having a cuff, can be easily donned and removed using just one hand.
    Type: Grant
    Filed: July 1, 2022
    Date of Patent: December 26, 2023
    Assignee: SHOWA GLOVE CO.
    Inventors: Ryo Takagi, Katsuhito Tomono, Nobuaki Takahashi
  • Publication number: 20230369980
    Abstract: This light-emitting element drive control device (100) comprises: a drive logic unit (113) which performs a drive control of a switch output stage (N1, D1, L1) for dropping an input voltage (VIN) to an output voltage (VOUT) and supplying a light-emitting element therewith; a charge-pump power supply unit (?) which generates a step-up voltage (CP) higher than the input voltage (VIN); and a current detecting comparator (114) which receives a supply of the step-up voltage (CP) and the output voltage (VOUT) as power supply voltages, and generates control signals (SET, RST) for the drive logic unit (113) by directly comparing a current detection signal (Vsns) corresponding to an inductor current (IL) of the switch output stage with a peak detection value (Vsns_pk) and a bottom detection value (Vsns_bt).
    Type: Application
    Filed: July 24, 2023
    Publication date: November 16, 2023
    Inventors: Akira AOKI, Ryo TAKAGI
  • Patent number: 11764683
    Abstract: This light-emitting element drive control device (100) comprises: a drive logic unit (113) which performs a drive control of a switch output stage (N1, D1, L1) for dropping an input voltage (VIN) to an output voltage (VOUT) and supplying a light-emitting element therewith: a charge-pump power supply unit (?) which generates a step-up voltage (CP) higher than the input voltage (VIN); and a current detecting comparator (114) which receives a supply of the step-up voltage (CP) and the output voltage (VOUT) as power supply voltages, and generates control signals (SET, RST) for the drive logic unit (113) by directly comparing a current detection signal (Vsns) corresponding to an inductor current (IL) of the switch output stage with a peak detection value (Vsns_pk) and a bottom detection value (Vsns_bt).
    Type: Grant
    Filed: September 6, 2022
    Date of Patent: September 19, 2023
    Assignee: Rohm Co., Ltd.
    Inventors: Akira Aoki, Ryo Takagi
  • Publication number: 20220416667
    Abstract: This light-emitting element drive control device (100) comprises: a drive logic unit (113) which performs a drive control of a switch output stage (N1, D1, L1) for dropping an input voltage (VIN) to an output voltage (VOUT) and supplying a light-emitting element therewith: a charge-pump power supply unit (?) which generates a step-up voltage (CP) higher than the input voltage (VIN); and a current detecting comparator (114) which receives a supply of the step-up voltage (CP) and the output voltage (VOUT) as power supply voltages, and generates control signals (SET, RST) for the drive logic unit (113) by directly comparing a current detection signal (Vsns) corresponding to an inductor current (IL) of the switch output stage with a peak detection value (Vsns_pk) and a bottom detection value (Vsns_bt).
    Type: Application
    Filed: September 6, 2022
    Publication date: December 29, 2022
    Inventors: Akira AOKI, Ryo Takagi
  • Patent number: 11502608
    Abstract: This light-emitting element drive control device (100) comprises: a drive logic unit (113) which performs a drive control of a switch output stage (N1, D1, L1) for dropping an input voltage (VIN) to an output voltage (VOUT) and supplying a light-emitting element therewith; a charge-pump power supply unit (a) which generates a step-up voltage (CP) higher than the input voltage (VIN); and a current detecting comparator (114) which receives a supply of the step-up voltage (CP) and the output voltage (VOUT) as power supply voltages, and generates control signals (SET, RST) for the drive logic unit (113) by directly comparing a current detection signal (Vsns) corresponding to an inductor current (IL) of the switch output stage with a peak detection value (Vsns_pk) and a bottom detection value (Vsns_bt).
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: November 15, 2022
    Assignee: Rohm Co., Ltd.
    Inventors: Akira Aoki, Ryo Takagi
  • Publication number: 20220330634
    Abstract: An object of the present invention is to provide a glove which, while having a cuff, can be easily donned and removed using just one hand.
    Type: Application
    Filed: July 1, 2022
    Publication date: October 20, 2022
    Inventors: Ryo TAKAGI, Katsuhito TOMONO, Nobuaki TAKAHASHI
  • Patent number: 11406146
    Abstract: An object of the present invention is to provide a glove which, while having a cuff, can be easily donned and removed using just one hand.
    Type: Grant
    Filed: October 28, 2020
    Date of Patent: August 9, 2022
    Assignee: SHOWA GLOVE CO.
    Inventors: Ryo Takagi, Katsuhito Tomono, Nobuaki Takahashi
  • Patent number: 11265981
    Abstract: A light emitting element driving device includes, for example, a slope voltage generator generating a slope voltage including information on an inductor current passing through a switching output stage, a sense amplifier generating a sense voltage commensurate with the output current fed to a light-emitting element from the switching output stage, a sense amplifier generating a control voltage commensurate with the difference between the sense voltage and a reference voltage, a comparator comparing the slope voltage with the control voltage to generate a comparison signal, a controller controlling the switching output stage in accordance with the comparison signal, and a clamper limiting the control voltage to equal to or lower than a clamp voltage commensurate with the slope voltage.
    Type: Grant
    Filed: August 13, 2020
    Date of Patent: March 1, 2022
    Assignee: Rohm Co., Ltd.
    Inventors: Akira Aoki, Ryo Takagi
  • Patent number: 11172556
    Abstract: A light emitting element drive device generates a single output current while switching a target current value for each of a plurality of light emitting elements, and supplies the single output current to the plurality of light emitting elements in a time division manner.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: November 9, 2021
    Assignee: Rohm Co., Ltd.
    Inventors: Akira Aoki, Ryo Takagi, Masaaki Nakayama