Patents by Inventor Takashi Kawaguchi

Takashi Kawaguchi 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: 11906934
    Abstract: An electronic watch includes a driver controlled to be in an ON state in which a drive current is supplied to a coil of a watch motor, and an OFF state in which the drive current is not supplied, a current detector that detects a current value flowing through the coil, a driver controller that controls the driver, a polarity switching controller that alternately switches a polarity of the drive current to a first polarity and a second polarity, a sampling controller that, at a sampling cycle, intermittently causes the current detector and the driver controller to operate, and a sampling cycle setting controller that detects a sampling cycle setting condition and changes the sampling cycle in at least two stages of a first cycle and a second cycle longer than the first cycle.
    Type: Grant
    Filed: January 8, 2021
    Date of Patent: February 20, 2024
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Takashi Kawaguchi
  • Patent number: 11693368
    Abstract: Provided is an electronic timepiece capable of suppressing variation in the drive speed of a rotor, and driving a motor at a constant speed. The electronic timepiece has a driver; a controller that controls the driver to the on state or the off state according to a current flowing through a coil of a motor; a detection signal output device configured to output a detection signal when the on time or the off time, which are the continuous time of the on state and off state of the driver, meets a specific condition; a reference signal output device that outputs a reference signal used as a reference of a drive speed of the motor; and a drive cycle adjuster that compares the output timing of the detection signal and the reference signal, shortens the drive cycle when the detection signal is output after the reference signal, and when the detection signal is output before the reference signal, lengthens the drive cycle of the motor.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: July 4, 2023
    Inventor: Takashi Kawaguchi
  • Publication number: 20230077057
    Abstract: An object is to obtain a ?-amylase having heat resistance even to high temperatures exceeding 60° C. By screening ?-amylase producing bacteria from a soil sample, a novel Bacillus halosaccharovorans strain having a novel ?-amylase with heat resistance and the ?-amylase from the novel B. halosaccharovorans strain were obtained.
    Type: Application
    Filed: April 14, 2020
    Publication date: March 9, 2023
    Inventors: Jun-ichi SUMITANI, Shuji TANI, Takashi KAWAGUCHI
  • Patent number: 11429067
    Abstract: An electronic timepiece enables driving by appropriate drive conditions even when the load on a motor changes. The electronic timepiece includes a motor having a coil; a driver that is controlled to an on state supplying drive current to the coil, and an off state not supplying the drive current; a driver controller configured to control the driver to the on state or the off state based on a control parameter and current value through the coil; and a control parameter setter configured to maintain or change the control parameter based on the on state or the off state control state of the driver controller.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: August 30, 2022
    Inventors: Reiko Nagahama, Takashi Kawaguchi
  • Patent number: 11345293
    Abstract: A protector includes a protector main body, a lid member, a locking mechanism, and a pair of guide mechanisms. The locking mechanism has a locking hole formed in the lid member and opens on opposite sides in a height direction and a locking lug portion positioned at an end portion of an opposed wall portion on a side of an opening and that is locked to the locking hole. The locking mechanism locks the protector main body and the lid member to each other in a correct position. The guide mechanisms have guide chips positioned at opposite end portions in a width direction of the lid member and extending along the height direction and guide holes positioned at the end portions of the opposed wall portions on the side of the opening and into which the guide chips are respectively inserted along the height direction.
    Type: Grant
    Filed: July 15, 2020
    Date of Patent: May 31, 2022
    Assignee: YAZAKI CORPORATION
    Inventors: Akitoshi Kimura, Michihito Suzuki, Takashi Kawaguchi, Hirotada Suyama, Akihito Futori, Kazuya Takahashi
  • Patent number: 11296627
    Abstract: An electronic watch includes a motor including a coil, a driver controlled to an ON state for supplying a driving current to the coil and an OFF state for not supplying the driving current, a driver controller configured to control the driver to the ON state or the OFF state depending on a value of a current flowing through the coil, and a polarity switcher configured to switch a polarity of the driving current when a prescribed condition is satisfied after detecting that an ON time, which is a duration of the ON state of the driver controller, reaches a maximum.
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: April 5, 2022
    Inventors: Reiko Nagahama, Takashi Kawaguchi
  • Patent number: 11261436
    Abstract: Provided is a mutant ?-glucosidase capable of more efficiently saccharifying biomass. A mutant ?-glucosidase comprising an amino acid sequence having at least 80% sequence identity to SEQ ID NO: 1, wherein the amino acid sequence has asparagine at one or more positions selected from the group consisting of positions corresponding to positions 787, 790, and 797 of SEQ ID NO: 1, and has ?-glucosidase activity.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: March 1, 2022
    Assignee: Kao Corporation
    Inventors: Hiroshi Kakeshita, Nozomu Shibata, Junichi Sumitani, Yutaro Baba, Shuji Tani, Takashi Kawaguchi
  • Patent number: 11258384
    Abstract: A motor control circuit includes a driver having ON and OFF states, and outputs a drive signal to a coil of a motor, a lower limit detector detecting whether current flowing through the coil is less than a lower limit, an upper limit detector detecting whether current flowing through the coil is more than an upper limit, a drive controller placing the driver into the ON state based on a detection result in the lower limit detector after the driver is brought into the OFF state, and placing the driver into the OFF state when the upper limit detector detects that the current is more than the upper limit after a predetermined time elapses from the driver being placed in the ON state, and a polarity switcher switching a polarity of the drive signal when an OFF time of the driver satisfies a polarity switching condition.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: February 22, 2022
    Inventor: Takashi Kawaguchi
  • Patent number: 11225679
    Abstract: Provision of a mutant ?-glucosidase having high protease resistance. A mutant ?-glucosidase consists of an amino acid sequence having at least 90% sequence identity to SEQ ID NO: 1, wherein the amino acid sequence comprises Gln and Thr respectively at positions corresponding to positions 649 and 655 of SEQ ID NO: 1 or Tyr-Glu-Pro-Ala-Ser-Gly in a region corresponding to the region from position 653 to position 658 of SEQ ID NO: 1, and has ?-glucosidase activity.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: January 18, 2022
    Assignee: Kao Corporation
    Inventors: Junichi Sumitani, Yutaro Baba, Shuji Tani, Takashi Kawaguchi
  • Patent number: 11175632
    Abstract: An electronic timepiece detects an external magnetic field without using a magnetic sensor. The electronic timepiece has a driver that drives a motor; a current detector that detects a current value flowing through a coil of the motor; a controller that controls the driver to the on state or the off state according to the detected current value; a polarity changer that alternately changes the polarity of the drive current to a first polarity and a second polarity when an on time, which is a continuous time of the on state, meets a specific condition; a counter that counts the number of on states in the first polarity and the number of on states in the second polarity; and an external magnetic field detector that detects an external magnetic field based on a result of comparing the counted number of on states in the first polarity and the second polarity.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: November 16, 2021
    Inventor: Takashi Kawaguchi
  • Patent number: 11165376
    Abstract: A movement includes a driver having ON and OFF states, and outputting a drive signal to a coil of a motor, a lower limit detector detecting that a current flowing through the coil is less than a lower limit, a drive controller bringing the driver into the ON state based on a result of the lower limit detector, and bringing the driver into the OFF state based on an elapsed time from the ON state, a polarity switcher switching a polarity of the drive signal when an elapsed time from the OFF state of the driver satisfies a switching condition, and a drive stopper stopping driving of the driver when the OFF time satisfies a stopping condition.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: November 2, 2021
    Inventor: Takashi Kawaguchi
  • Patent number: 11137724
    Abstract: An electronic timepiece can prevent overrunning when driving a motor at a high speed. The electronic timepiece has a controller that controls a driver to an on state or an off state according to the current value detected by the current detector; a polarity changer that determines driving one step of the motor ended and changes the polarity of the drive current when the on time or off time is detected to meet a specific condition; and a drive period adjuster that sets the terminal supplying the drive current to the coil to a first state if the remaining drive step count is greater than the remaining count evaluation number, and if the remaining drive step count is less than or equal to the remaining count evaluation number, sets the terminal to a second state in which the brake force applied to the rotor is greater than in the first state.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: October 5, 2021
    Inventor: Takashi Kawaguchi
  • Patent number: 11082655
    Abstract: A solid state imaging device includes: a pixel array unit that has a plurality of pixels 2-dimensionally arranged in a matrix and a plurality of signal lines arranged along a column direction; A/D conversion units that are provided corresponding to the respective signal lines and convert an analog signal output from a pixel through the signal line into a digital signal; and a switching unit that switches or converts the analog signal output through each signal line into a digital signal using any of an A/D conversion unit provided corresponding to the signal line through which the analog signal is transmitted, and an A/D conversion unit provided corresponding to a signal line other than the signal line through which the analog signal is transmitted.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: August 3, 2021
    Inventor: Takashi Kawaguchi
  • Patent number: 11076119
    Abstract: A solid state imaging device includes: a pixel array unit that has a plurality of pixels 2-dimensionally arranged in a matrix and a plurality of signal lines arranged along a column direction; A/D conversion units that are provided corresponding to the respective signal lines and convert an analog signal output from a pixel through the signal line into a digital signal; and a switching unit that switches or converts the analog signal output through each signal line into a digital signal using any of an A/D conversion unit provided corresponding to the signal line through which the analog signal is transmitted, and an A/D conversion unit provided corresponding to a signal line other than the signal line through which the analog signal is transmitted.
    Type: Grant
    Filed: April 23, 2020
    Date of Patent: July 27, 2021
    Inventor: Takashi Kawaguchi
  • Publication number: 20210216045
    Abstract: An electronic watch includes a driver controlled to be in an ON state in which a drive current is supplied to a coil of a watch motor, and an OFF state in which the drive current is not supplied, a current detector that detects a current value flowing through the coil, a driver controller that controls the driver, a polarity switching controller that alternately switches a polarity of the drive current to a first polarity and a second polarity, a sampling controller that, at a sampling cycle, intermittently causes the current detector and the driver controller to operate, and a sampling cycle setting controller that detects a sampling cycle setting condition and changes the sampling cycle in at least two stages of a first cycle and a second cycle longer than the first cycle.
    Type: Application
    Filed: January 8, 2021
    Publication date: July 15, 2021
    Inventor: Takashi KAWAGUCHI
  • Patent number: 10958199
    Abstract: Provided is a motor drive circuit capable of driving a stepper motor even if the load on the stepper motor varies. A motor drive circuit has a first drive circuit that outputs a first drive signal to the driver; a second drive circuit that outputs a second drive signal to the driver; a controller that controls the first drive circuit and second drive circuit. The first drive circuit is configured to output a first drive signal based on the current value of current flow of a coil of a stepper motor. The second drive circuit is configured to output multiple types of second drive signals that differ by the supply time of drive current supplied to the coil. Based on a result of driving by the first drive circuit, the controller selects the type of second drive signal the second drive circuit outputs.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: March 23, 2021
    Inventors: Reiko Nagahama, Takashi Kawaguchi
  • Publication number: 20210024969
    Abstract: Provision of a mutant ?-glucosidase having high protease resistance. A mutant ?-glucosidase consists of an amino acid sequence having at least 90% sequence identity to SEQ ID NO: 1, wherein the amino acid sequence comprises Gln and Thr respectively at positions corresponding to positions 649 and 655 of SEQ ID NO: 1 or Tyr-Glu-Pro-Ala-Ser-Gly in a region corresponding to the region from position 653 to position 658 of SEQ ID NO: 1, and has ?-glucosidase activity.
    Type: Application
    Filed: February 21, 2019
    Publication date: January 28, 2021
    Applicant: Kao Corporation
    Inventors: Junichi SUMITANI, Yutaro BABA, Shuji TANI, Takashi KAWAGUCHI
  • Publication number: 20210016727
    Abstract: A protector includes a protector main body, a lid member, a locking mechanism, and a pair of guide mechanisms. The locking mechanism has a locking hole formed in the lid member and opens on opposite sides in a height direction and a locking lug portion positioned at an end portion of an opposed wall portion on a side of an opening and that is locked to the locking hole. The locking mechanism locks the protector main body and the lid member to each other in a correct position. The guide mechanisms have guide chips positioned at opposite end portions in a width direction of the lid member and extending along the height direction and guide holes positioned at the end portions of the opposed wall portions on the side of the opening and into which the guide chips are respectively inserted along the height direction.
    Type: Application
    Filed: July 15, 2020
    Publication date: January 21, 2021
    Inventors: Akitoshi Kimura, Michihito Suzuki, Takashi Kawaguchi, Hirotada Suyama, Akihito Futori, Kazuya Takahashi
  • Publication number: 20210017511
    Abstract: Provided is a mutant ?-glucosidase capable of more efficiently saccharifying biomass. A mutant ?-glucosidase comprising an amino acid sequence having at least 80% sequence identity to SEQ ID NO: 1, wherein the amino acid sequence has asparagine at one or more positions selected from the group consisting of positions corresponding to positions 787, 790, and 797 of SEQ ID NO: 1, and has ?-glucosidase activity.
    Type: Application
    Filed: February 21, 2019
    Publication date: January 21, 2021
    Applicant: Kao Corporation
    Inventors: Hiroshi KAKESHITA, Nozomu SHIBATA, Junichi SUMITANI, Yutaro BABA, Shuji TANI, Takashi KAWAGUCHI
  • Publication number: 20210006187
    Abstract: An electronic watch includes a motor including a coil, a driver controlled to an ON state for supplying a driving current to the coil and an OFF state for not supplying the driving current, a driver controller configured to control the driver to the ON state or the OFF state depending on a value of a current flowing through the coil, and a polarity switcher configured to switch a polarity of the driving current when a prescribed condition is satisfied after detecting that an ON time, which is a duration of the ON state of the driver controller, reaches a maximum.
    Type: Application
    Filed: July 2, 2020
    Publication date: January 7, 2021
    Inventors: Reiko NAGAHAMA, Takashi KAWAGUCHI