Patents by Inventor Junpei Nakayama

Junpei Nakayama 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: 20230318507
    Abstract: A control apparatus includes a drive circuit unit to which regenerative electric power is input, a discharge resistance unit parallel-coupled to the drive circuit unit, to which the regenerative electric power is input from the drive circuit unit, and, when a voltage value of the regenerative electric power exceeds a threshold value, consuming electric power, a second converter circuit unit parallel-coupled to a first converter circuit unit and converting and outputting an alternating current into a direct current, a step-down circuit unit stepping down and outputting a voltage of the current output from the second converter circuit unit, an energization control circuit unit actuated by the direct current and controlling the drive circuit unit, and a regenerative electric power supply unit having a regenerative diode coupled to the discharge resistance unit and outputting a direct current of the regenerative electric power to the step-down circuit unit.
    Type: Application
    Filed: March 30, 2023
    Publication date: October 5, 2023
    Inventor: Junpei NAKAYAMA
  • Patent number: 11691272
    Abstract: A motor drive circuit for a robot includes a switching unit switching among a normal state in which regenerative power is supplied to a regenerative capacitor, a first state in which a voltage is applied to a first resistor, and a second state in which a voltage is applied to the first resistor and a second resistor based on a detection result of a detection unit, wherein the switching unit switches to the first state when the voltage applied to the regenerative capacitor detected in the detection unit is equal to or larger than a first threshold in the normal state, and switches to the second state when the voltage applied to the first resistor is equal to or larger than a second threshold larger than the first threshold in the first state.
    Type: Grant
    Filed: June 27, 2022
    Date of Patent: July 4, 2023
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Junpei Nakayama
  • Publication number: 20220410377
    Abstract: A motor drive circuit for a robot includes a switching unit switching among a normal state in which regenerative power is supplied to a regenerative capacitor, a first state in which a voltage is applied to a first resistor, and a second state in which a voltage is applied to the first resistor and a second resistor based on a detection result of a detection unit, wherein the switching unit switches to the first state when the voltage applied to the regenerative capacitor detected in the detection unit is equal to or larger than a first threshold in the normal state, and switches to the second state when the voltage applied to the first resistor is equal to or larger than a second threshold larger than the first threshold in the first state.
    Type: Application
    Filed: June 27, 2022
    Publication date: December 29, 2022
    Inventor: Junpei NAKAYAMA
  • Patent number: 10243383
    Abstract: A power source is configured to include a plurality of batteries and a switching circuit that switches a state to and from a first state in which the electric power is supplied to the outside by the plurality of batteries being connected in series and a second state in which the electric power is supplied to the outside using remaining batteries without using a part of the plurality of batteries.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: March 26, 2019
    Assignee: Seiko Epson Corporation
    Inventors: Junpei Nakayama, Ryohei Horita
  • Publication number: 20170187184
    Abstract: A power source is configured to include a plurality of batteries and a switching circuit that switches a state to and from a first state in which the electric power is supplied to the outside by the plurality of batteries being connected in series and a second state in which the electric power is supplied to the outside using remaining batteries without using a part of the plurality of batteries.
    Type: Application
    Filed: December 21, 2016
    Publication date: June 29, 2017
    Inventors: Junpei NAKAYAMA, Ryohei HORITA
  • Patent number: 8449065
    Abstract: A detection unit that detects the width of a medium on a placement surface is mounted on a carriage, a reflection plate is formed on one end of the placement surface while the reflection plate is inclined at the placement surface, and the carriage is moved to a position in which the carriage faces the reflection plate, so that the thickness of the medium is determined based on the output of the detection unit while moving the carriage. Therefore, the thickness of the medium is detected with high accuracy without using a dedicated sensor.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: May 28, 2013
    Assignee: Seiko Epson Corporation
    Inventor: Junpei Nakayama
  • Publication number: 20110199412
    Abstract: A detection unit that detects the width of a medium on a placement surface is mounted on a carriage, a reflection plate is formed on one end of the placement surface while the reflection plate is inclined at the placement surface, and the carriage is moved to a position in which the carriage faces the reflection plate, so that the thickness of the medium is determined based on the output of the detection unit while moving the carriage. Therefore, the thickness of the medium is detected with high accuracy without using a dedicated sensor.
    Type: Application
    Filed: February 15, 2011
    Publication date: August 18, 2011
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Junpei Nakayama
  • Publication number: 20090161180
    Abstract: A printing apparatus includes a printing unit that ejects ink from nozzles toward a recording medium to thereby perform printing, vibration detection unit that is provided in an apparatus body to detect vibration of the apparatus body, a determination unit that, if vibration is detected by the vibration detection unit while printing by the printing unit is being performed, determines an abnormality, and a display control unit that, if an abnormality is determined by the determination unit, informs a user of the abnormality after the printing has ended, and controls a display unit to display an image that was being printed when the abnormality was determined.
    Type: Application
    Filed: December 19, 2008
    Publication date: June 25, 2009
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Junpei Nakayama