Patents by Inventor Keisuke Kanda

Keisuke Kanda 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: 12273023
    Abstract: An active snubber circuit is connected to a buck converter and decreases a first surge voltage and a second surge voltage generated by the buck converter. The active snubber circuit includes a first FET switch connected to the output point of the first surge voltage and a first power storage element, a second FET switch connected to the output point of the second surge voltage and a second power storage element, an inductor connected to a connection point positioned on an output side with respect to the output point of the second surge voltage, the first and second FET switches, and an element connected to the first and second FET switches, the inductor, and ground and through which a forward current flows.
    Type: Grant
    Filed: April 10, 2023
    Date of Patent: April 8, 2025
    Assignee: YAZAKI CORPORATION
    Inventors: Keisuke Kanda, Koichi Ushitani
  • Publication number: 20250042178
    Abstract: A laser printing apparatus includes: an input interface for setting a printing pattern on a setting plane; a first selection unit that displays a plurality of different types of materials on a display unit and selects one thereof; a second selection unit that displays a plurality of different types of laser printing methods corresponding to a workpiece of a type on the display unit based on the type of a material selected by the first selection unit, and selects any one thereof; and a printing condition setting unit that sets a printing condition for printing the printing pattern on the workpiece of the material type by a laser printing method based on the printing pattern set by the input interface, the type of the material selected by the first selection unit, and a type of the laser printing method selected by the second selection unit.
    Type: Application
    Filed: June 19, 2024
    Publication date: February 6, 2025
    Applicant: Keyence Corporation
    Inventors: Keisuke KANDA, Junya ONODA, Daishi WATANABE, Yuri ITO
  • Patent number: 12086356
    Abstract: A display device with a touch panel is provided with a transmission touch electrode, a reception touch electrode, a transmission reference electrode formed from the same material as the transmission touch electrode, a reception reference electrode formed from the same material as the reception touch electrode, a reference electrode that faces the transmission reference electrode and to which a predetermined potential is applied, and a touch control circuit that detects a touch by a pointer on the basis of a comparison between a touch detection signal from the reception touch electrode and a detection threshold value. The reception reference electrode outputs a reference signal based on a capacitance formed between the reception reference electrode and the transmission reference electrode, and the touch control circuit changes the detection threshold value in accordance with a change in the reference signal.
    Type: Grant
    Filed: January 3, 2023
    Date of Patent: September 10, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Takuya Henmi, Satoshi Sekido, Keisuke Kanda, Yuhji Satoh
  • Publication number: 20240186899
    Abstract: A voltage conversion device of the present disclosure includes: an HV-48V DC/DC converter that steps down a high voltage input from a high-voltage battery to 48 V; a first wire harness that supplies 48 V from the HV-48V DC/DC converter to a 48V load; an HV-12V DC/DC converter that steps down the high voltage input from the high-voltage battery to 12 V; a second wire harness that supplies 12 V from the HV-12V DC/DC converter to a 12V load; a 48V-12V DC/DC converter that is connected to the first wire harness and the second wire harness, steps down 48 V to 12 V, and steps up 12 V to 48 V; and a control device.
    Type: Application
    Filed: February 10, 2024
    Publication date: June 6, 2024
    Inventors: Keisuke Kanda, Satoshi Ito, Shota Yoshimitsu
  • Patent number: 11855542
    Abstract: A power-supply control device capable of reducing a size of a power-supply device including a main power-supply and a plurality of auxiliary power-supply systems and stably supplying electric power to the plurality of auxiliary power-supply systems is provided. The power-supply control device includes a DC/DC converter that steps down a power-supply voltage from a main battery and outputs the stepped-down power-supply voltage to a first auxiliary power-supply system and a second auxiliary power-supply system; and a controller that stops supply of electric power from the DC/DC converter to the second auxiliary power-supply system when a load of a heater is in a predetermined high-load state, and supplies electric power from the DC/DC converter to the second auxiliary power-supply system when the load of the heater changes from the predetermined high-load state to a predetermined low-load state.
    Type: Grant
    Filed: October 25, 2021
    Date of Patent: December 26, 2023
    Assignee: YAZAKI CORPORATION
    Inventors: Satoshi Ito, Keisuke Kanda, Shota Yoshimitsu
  • Publication number: 20230369967
    Abstract: An active snubber circuit is connected to a buck converter and decreases a first surge voltage and a second surge voltage generated by the buck converter. The active snubber circuit includes a first FET switch connected to the output point of the first surge voltage and a first power storage element, a second FET switch connected to the output point of the second surge voltage and a second power storage element, an inductor connected to a connection point positioned on an output side with respect to the output point of the second surge voltage, the first and second FET switches, and an element connected to the first and second FET switches, the inductor, and ground and through which a forward current flows.
    Type: Application
    Filed: April 10, 2023
    Publication date: November 16, 2023
    Inventors: Keisuke Kanda, Koichi Ushitani
  • Publication number: 20230229257
    Abstract: A display device with a touch panel is provided with a transmission touch electrode, a reception touch electrode, a transmission reference electrode formed from the same material as the transmission touch electrode, a reception reference electrode formed from the same material as the reception touch electrode, a reference electrode that faces the transmission reference electrode and to which a predetermined potential is applied, and a touch control circuit that detects a touch by a pointer on the basis of a comparison between a touch detection signal from the reception touch electrode and a detection threshold value. The reception reference electrode outputs a reference signal based on a capacitance formed between the reception reference electrode and the transmission reference electrode, and the touch control circuit changes the detection threshold value in accordance with a change in the reference signal.
    Type: Application
    Filed: January 3, 2023
    Publication date: July 20, 2023
    Applicant: Sharp Display Technology Corporation
    Inventors: Takuya HENMI, Satoshi SEKIDO, Keisuke KANDA, Yuhji SATOH
  • Publication number: 20220181982
    Abstract: A voltage conversion device includes input-side switching elements provided on an input side of a smoothing inductance and configured to perform switching, first and second power supply lines provided on an output side of the smoothing inductance and configured to respectively supply power to a first load and a second load, output-side switching elements respectively provided on the first and second power supply lines, and a control unit configured to perform on/off control on the input-side switching elements and the output-side switching elements. The control unit performs the on/off control by setting switching frequencies of the output-side switching elements to be lower than switching frequencies of the input-side switching elements.
    Type: Application
    Filed: November 5, 2021
    Publication date: June 9, 2022
    Applicant: Yazaki Corporation
    Inventors: Keisuke Kanda, Satoshi Ito, Shota Yoshimitsu
  • Publication number: 20220173666
    Abstract: A voltage conversion device includes first to fourth input-side switching elements provided on an input side of a smoothing inductance, first and second power supply lines provided on an output side of the smoothing inductance and configured to respectively supply power to a first load and a second load operating at an operating voltage lower than that of the first load; first and second output-side switching elements respectively provided on the first and second power supply lines, and a control unit configured to perform on/off control on the first and second output-side switching elements. The control unit turns on the first output-side switching element to supply power to the first load, without supplying power to the second load by turning off the second output-side switching element, during a period in which the current is supplied to the smoothing inductance by switching of the input-side switching elements.
    Type: Application
    Filed: November 12, 2021
    Publication date: June 2, 2022
    Applicant: Yazaki Corporation
    Inventors: Keisuke KANDA, Satoshi ITO, Shota YOSHIMITSU
  • Patent number: 11320679
    Abstract: In a display device including a connection portion pressure-bonded with an anisotropic conductive film and an FPC, a closed circuit configured to allow an abnormality, such as a connection failure in the connection portion, or disconnection or a short circuit in a wiring line of the FPC to be detected, is provided separately from a wiring line needed for displaying an image. When an abnormality occurs, a resistance value of the closed circuit changes, and thus a current value of current flowing through the closed circuit changes. As a result, even when an image is displayed, a detection circuit detects a change in a value of voltage applied to the closed circuit and notifies a user, and thus the user can know that an abnormality occurs in the connection portion or the wiring line of the FPC.
    Type: Grant
    Filed: May 19, 2021
    Date of Patent: May 3, 2022
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Keisuke Kanda
  • Publication number: 20220131472
    Abstract: A power-supply control device capable of reducing a size of a power-supply device including a main power-supply and a plurality of auxiliary power-supply systems and stably supplying electric power to the plurality of auxiliary power-supply systems is provided. The power-supply control device includes a DC/DC converter that steps down a power-supply voltage from a main battery and outputs the stepped-down power-supply voltage to a first auxiliary power-supply system and a second auxiliary power-supply system; and a controller that stops supply of electric power from the DC/DC converter to the second auxiliary power-supply system when a load of a heater is in a predetermined high-load state, and supplies electric power from the DC/DC converter to the second auxiliary power-supply system when the load of the heater changes from the predetermined high-load state to a predetermined low-load state.
    Type: Application
    Filed: October 25, 2021
    Publication date: April 28, 2022
    Applicant: Yazaki Corporation
    Inventors: Satoshi Ito, Keisuke Kanda, Shota Yoshimitsu
  • Patent number: 11260740
    Abstract: The vehicle power supply system includes the DC/DC converter that is disposed on an electric path between the first load related to vehicle control and the battery and converts a voltage of direct current power supplied from the battery to the first load, and the detection device that detects the voltage of the battery. In a case where the engine is restarted by using the starter from the automatically stopped state of the engine, the detection device controls the DC/DC converter to start in a case where the voltage of the battery becomes equal to or less than a threshold value during a period from stoppage of the alternator to start of the starter.
    Type: Grant
    Filed: February 23, 2021
    Date of Patent: March 1, 2022
    Assignee: YAZAKI CORPORATION
    Inventor: Keisuke Kanda
  • Publication number: 20210364831
    Abstract: In a display device including a connection portion pressure-bonded with an anisotropic conductive film and an FPC, a closed circuit configured to allow an abnormality, such as a connection failure in the connection portion, or disconnection or a short circuit in a wiring line of the FPC to be detected, is provided separately from a wiring line needed for displaying an image. When an abnormality occurs, a resistance value of the closed circuit changes, and thus a current value of current flowing through the closed circuit changes. As a result, even when an image is displayed, a detection circuit detects a change in a value of voltage applied to the closed circuit and notifies a user, and thus the user can know that an abnormality occurs in the connection portion or the wiring line of the FPC.
    Type: Application
    Filed: May 19, 2021
    Publication date: November 25, 2021
    Inventor: Keisuke KANDA
  • Publication number: 20210276407
    Abstract: The vehicle power supply system includes the DC/DC converter that is disposed on an electric path between the first load related to vehicle control and the battery and converts a voltage of direct current power supplied from the battery to the first load, and the detection device that detects the voltage of the battery. In a case where the engine is restarted by using the starter from the automatically stopped state of the engine, the detection device controls the DC/DC converter to start in a case where the voltage of the battery becomes equal to or less than a threshold value during a period from stoppage of the alternator to start of the starter.
    Type: Application
    Filed: February 23, 2021
    Publication date: September 9, 2021
    Inventor: Keisuke Kanda
  • Publication number: 20210265916
    Abstract: In a power supply device, a primary winding is connected to, out of drain-source terminals of FETs as the subject of soft switching control, a source terminal and a drain terminal where the potential of the drain-source terminals is adjusted. In a case where a current value detected by a current detection unit is equal to or smaller than a reference current value defined in advance, a controller allows the current flowing backward due to resonance of a coil and a capacitor of a smoothing circuit to flow in a secondary winding via a rectifier circuit.
    Type: Application
    Filed: February 17, 2021
    Publication date: August 26, 2021
    Inventors: Keisuke Kanda, Satoshi Ito, Shota Yoshimitsu
  • Patent number: 11005380
    Abstract: A multi-output power supply device includes an inductor, a first output terminal, a second output terminal, an FET, an FET, a chopper circuit, and a controller. The FET adjusts a current output from the inductor to the first output terminal. The FET adjusts a current output from the inductor to the second output terminal. The chopper circuit has the FET and the inductor. The FET is connected in parallel with the FET, and conducts or cuts off a current. The inductor is provided between the FET and the second output terminal. For example, the controller lowers a potential from the first output terminal by turning on the FET and sets a potential difference between a drain terminal and a source terminal of the FET to zero to suppress a switching loss when the FET is turned on.
    Type: Grant
    Filed: June 1, 2020
    Date of Patent: May 11, 2021
    Assignee: YAZAKI CORPORATION
    Inventors: Keisuke Kanda, Shota Yoshimitsu
  • Patent number: 10964282
    Abstract: A power supply circuit includes a voltage boosting circuit for boosting a supplied first power supply voltage to a second power supply voltage used in a drive circuit of a display device, a capacitor provided between a power supply wiring for outputting the second power supply voltage and a ground, a logic circuit for outputting a high-level signal when the first power supply voltage and a supplied first control signal are at a high level, a delay circuit for outputting a signal obtained by delaying an output signal of the logic circuit as a second control signal used for an operation control of the drive circuit, and a resistor provided between an input terminal of the delay circuit and the ground. The power supply circuit may include a first diode on the power supply wiring, or may include a second diode having an anode terminal connected to an output terminal of the second control signal and a cathode terminal connected to the input terminal of the delay circuit.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: March 30, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Keisuke Kanda
  • Patent number: 10897209
    Abstract: In the power supply device, the insulated transformer transforms the voltage of alternating-current power. The rectifying circuit rectifies the alternating-current power transformed by the transformer to direct-current power. The smoothing inductor smoothes the direct-current power rectified by the rectifying circuit. The first output terminal outputs the direct-current power smoothed by the smoothing inductor. The second output terminal is a terminal different from the first output terminal and outputs the direct-current power smoothed by the smoothing inductor. An FET is provided between the smoothing inductor and the first output terminal and adjusts a current output from the smoothing inductor to the first output terminal. An FET is provided between the smoothing inductor and the second output terminal and adjusts a current output from the smoothing inductor to the second output terminal. The controller controls the FET and the FET.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: January 19, 2021
    Assignee: YAZAKI CORPORATION
    Inventors: Shota Yoshimitsu, Keisuke Kanda
  • Publication number: 20200389094
    Abstract: A multi-output power supply device includes an inductor, a first output terminal, a second output terminal, an FET, an FET, a chopper circuit, and a controller. The FET adjusts a current output from the inductor to the first output terminal. The FET adjusts a current output from the inductor to the second output terminal. The chopper circuit has the FET and the inductor. The FET is connected in parallel with the FET, and conducts or cuts off a current. The inductor is provided between the FET and the second output terminal. For example, the controller lowers a potential from the first output terminal by turning on the FET and sets a potential difference between a drain terminal and a source terminal of the FET to zero to suppress a switching loss when the FET is turned on.
    Type: Application
    Filed: June 1, 2020
    Publication date: December 10, 2020
    Inventors: Keisuke Kanda, Shota Yoshimitsu
  • Patent number: 10833593
    Abstract: In the power supply device, the insulated transformer transforms the voltage of alternating-current power. The rectifying circuit rectifies the alternating-current power transformed by the transformer to direct-current power. The smoothing inductor smoothes the direct-current power rectified by the rectifying circuit. The first output terminal outputs the direct-current power smoothed by the smoothing inductor. The second output terminal is a terminal different from the first output terminal and outputs the direct-current power smoothed by the smoothing inductor. An FET is provided between the smoothing inductor and the first output terminal and adjusts a current output from the smoothing inductor to the first output terminal. An FET is provided between the smoothing inductor and the second output terminal and adjusts a current output from the smoothing inductor to the second output terminal. The controller controls the FET and the FET.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: November 10, 2020
    Assignee: YAZAKI CORPORATION
    Inventors: Shota Yoshimitsu, Keisuke Kanda