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).
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Patent number: 12379262Abstract: 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: GrantFiled: April 19, 2022Date of Patent: August 5, 2025Assignees: National Institute of Advanced Industrial Science and Technology, Otsuka Medical Devices Co., Ltd.Inventors: Ryo Takagi, Koji Inui
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Publication number: 20250016898Abstract: 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: ApplicationFiled: September 20, 2024Publication date: January 9, 2025Inventors: Ryo TAKAGI, Akira AOKI
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Publication number: 20240333162Abstract: 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: ApplicationFiled: June 14, 2024Publication date: October 3, 2024Inventors: Akira AOKI, Ryo TAKAGI
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Patent number: 12096530Abstract: 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: GrantFiled: December 20, 2021Date of Patent: September 17, 2024Inventors: Daisuke Kanbara, Akira Aoki, Ryo Takagi
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Patent number: 12047004Abstract: 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: GrantFiled: July 24, 2023Date of Patent: July 23, 2024Inventors: Akira Aoki, Ryo Takagi
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Publication number: 20240237168Abstract: 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: ApplicationFiled: December 29, 2023Publication date: July 11, 2024Inventors: Akira AOKI, Ryo TAKAGI
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Publication number: 20240210256Abstract: 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: ApplicationFiled: April 19, 2022Publication date: June 27, 2024Inventors: Ryo Takagi, Koji Inui
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Publication number: 20240138039Abstract: 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: ApplicationFiled: December 29, 2023Publication date: April 25, 2024Inventors: Akira AOKI, Ryo TAKAGI
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Publication number: 20240130018Abstract: 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: ApplicationFiled: December 27, 2023Publication date: April 18, 2024Inventors: Akira AOKI, Ryo TAKAGI
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Patent number: 11871490Abstract: 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: GrantFiled: September 29, 2020Date of Patent: January 9, 2024Assignee: Rohm Co., Ltd.Inventors: Akira Aoki, Ryo Takagi
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Publication number: 20230422375Abstract: 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: ApplicationFiled: December 20, 2021Publication date: December 28, 2023Inventors: Daisuke KANBARA, Akira AOKI, Ryo TAKAGI
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Patent number: 11849787Abstract: 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: GrantFiled: July 1, 2022Date of Patent: December 26, 2023Assignee: SHOWA GLOVE CO.Inventors: Ryo Takagi, Katsuhito Tomono, Nobuaki Takahashi
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Publication number: 20230369980Abstract: 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: ApplicationFiled: July 24, 2023Publication date: November 16, 2023Inventors: Akira AOKI, Ryo TAKAGI
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Patent number: 11764683Abstract: 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: GrantFiled: September 6, 2022Date of Patent: September 19, 2023Assignee: Rohm Co., Ltd.Inventors: Akira Aoki, Ryo Takagi
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Publication number: 20220416667Abstract: 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: ApplicationFiled: September 6, 2022Publication date: December 29, 2022Inventors: Akira AOKI, Ryo Takagi
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Patent number: 11502608Abstract: 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: GrantFiled: January 23, 2019Date of Patent: November 15, 2022Assignee: Rohm Co., Ltd.Inventors: Akira Aoki, Ryo Takagi
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Publication number: 20220330634Abstract: 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: ApplicationFiled: July 1, 2022Publication date: October 20, 2022Inventors: Ryo TAKAGI, Katsuhito TOMONO, Nobuaki TAKAHASHI
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Patent number: 11406146Abstract: 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: GrantFiled: October 28, 2020Date of Patent: August 9, 2022Assignee: SHOWA GLOVE CO.Inventors: Ryo Takagi, Katsuhito Tomono, Nobuaki Takahashi
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Patent number: 11265981Abstract: 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: GrantFiled: August 13, 2020Date of Patent: March 1, 2022Assignee: Rohm Co., Ltd.Inventors: Akira Aoki, Ryo Takagi
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Patent number: 11172556Abstract: 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: GrantFiled: May 29, 2020Date of Patent: November 9, 2021Assignee: Rohm Co., Ltd.Inventors: Akira Aoki, Ryo Takagi, Masaaki Nakayama