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).

  • 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: 11953059
    Abstract: A speed reducer is configured to reduce a rotational speed of rotation generated by torque received from a drive device and output the torque of the rotation of the reduced rotational speed. A drive cam has a plurality of drive cam grooves formed at one end surface of the drive cam and is rotated by the torque outputted from the speed reducer. A driven cam has a plurality of driven cam grooves formed at one end surface of the driven cam while each of the plurality of rolling elements is clamped between a corresponding one of the plurality of drive cam grooves and a corresponding one of the plurality of driven cam grooves. At least a part of each of the plurality of drive cam grooves overlaps with the speed reducer in the axial direction.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: April 9, 2024
    Assignee: DENSO CORPORATION
    Inventors: Ryo Ishibashi, Akira Takagi, Takumi Sugiura
  • Publication number: 20240102517
    Abstract: A housing is placed at an inside space of a case to be installed on a vehicle. The housing includes: a housing plate portion configured to contact a case plate portion of the case; and a receiving space located on one side of the housing plate portion which is opposite to the case plate portion. An electric motor is placed at the receiving space and is configured to output a torque. The housing includes: a housing ventilation hole that extends through the housing plate portion and communicates between an outside space of the housing and the receiving space; and a breathable filter that is placed on a side of the housing ventilation hole, at which the case plate portion is placed, to cover the housing ventilation hole, while the breathable filter is configured to perm it a gas to pass through the breathable filter.
    Type: Application
    Filed: December 7, 2023
    Publication date: March 28, 2024
    Inventors: Hirohisa NODA, Ryo ISHIBASHI, Akira TAKAGI
  • Patent number: 11940012
    Abstract: A normal-time drive cam groove extends from a drive cam specific point, which is defined as a specific point of the drive cam, toward one side in a circumferential direction of the drive cam. A groove bottom at the normal-time drive cam groove is sloped relative to one end surface of the drive cam such that a depth of the groove bottom continuously decreases from the drive cam specific point toward the one side in the circumferential direction of the drive cam. An emergency-time drive cam groove extends from the drive cam specific point toward another side in the circumferential direction of the drive cam.
    Type: Grant
    Filed: December 30, 2020
    Date of Patent: March 26, 2024
    Assignee: DENSO CORPORATION
    Inventors: Akira Takagi, Ryo Ishibashi, Takumi Sugiura
  • Patent number: 11929307
    Abstract: A power semiconductor module, which is a semiconductor device, includes a semiconductor element 155 and a lead frame 318 that is disposed to face the semiconductor element 155 and connected to the semiconductor element 155 by a solder material 162. The lead frame 318 has the top surface 331 including a surface facing the semiconductor element 155, and the side surface 334 connected to the peripheral edge portion 333 of the top surface 331 at a predetermined angle with respect to the top surface 331. The top surface of the lead frame 318 includes the solder surface 332 that is in contact with the solder material 162 and the solder resistance surface on which the solder material 162 is less wettable than on the solder surface 332. The solder resistance surface is formed to surround the periphery of the solder surface 332. In this manner, when the semiconductor element and the lead frame are solder-joined in the semiconductor device, the region where the solder wet-spreads is appropriately controlled.
    Type: Grant
    Filed: January 15, 2020
    Date of Patent: March 12, 2024
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Yusuke Takagi, Ryo Terayama, Ko Hamaya, Osamu Ikeda
  • 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
  • Patent number: 11104225
    Abstract: A transfer case with an actuator for operating a two-speed transmission (i.e., range mechanism) and a clutch (i.e., mode mechanism). The actuator employs a motor-driven cam structure that coordinates the movement of a first fork, which is associated with the range mechanism, and a second fork that is associated with the mode mechanism. A resilient coupling is employed to provide compliance between the motor and the cam structure in the event that tooth-on-tooth contact inhibits the range mechanism from changing from a high-range mode and a low range mode or tooth-on-tooth contact inhibits the mode mechanism from changing between a two-wheel drive mode and a four-wheel drive mode. A sensor target and sensor are employed to identify the rotational positioning of the cam structure placement, which is indicative of the modes in which the transmission and the clutch are operating.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: August 31, 2021
    Assignee: BorgWarner Inc.
    Inventors: Travis J. Wentz, Christopher A. Chirco, Ryo Takagi
  • Patent number: D929697
    Type: Grant
    Filed: February 10, 2021
    Date of Patent: September 7, 2021
    Assignee: SHOWA GLOVE CO.
    Inventors: Ryo Takagi, Nobuaki Takahashi
  • Patent number: D929698
    Type: Grant
    Filed: February 10, 2021
    Date of Patent: September 7, 2021
    Assignee: SHOWA GLOVE CO.
    Inventors: Ryo Takagi, Nobuaki Takahashi