Patents by Inventor Takeshi Iwasa

Takeshi Iwasa 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: 11592510
    Abstract: The present invention relates to a medical apparatus which includes a motion mechanism which has at least one degree of freedom, an actuator configured to drive the motion mechanism and a control unit configured to control the actuator, and which operates in a magnetic field environment of an MRI, the medical apparatus including: a data storage unit in which data related to magnetic susceptibility of the actuator is stored; a calculating unit configured to calculate information related to an influence which the actuator exerts upon the magnetic field environment by calculation based on the magnetic susceptibility; and a communication unit configured to output the information to the MRI. An influence which an apparatus which operates in a strong magnetic field environment exerts upon an MR image can be reduced.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: February 28, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takeshi Iwasa
  • Patent number: 11146778
    Abstract: A synchronization control device includes a detection unit configured to detect at least one of a position and an orientation of the device in a three-dimensional space. The synchronization control device includes one or more image pickup elements, and a control unit configured to control such that a phase of an image capturing timing of the one or more image pickup elements is synchronized with a phase of a detection timing of the detection unit, and a cycle length of the image capturing timing is equal to a cycle length of the detection timing or an integral multiple of the cycle length of the detection tuning.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: October 12, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takeshi Iwasa
  • Publication number: 20210141227
    Abstract: A display device having a display element configured to display an image, the display device comprising: a wearing state determination unit configured to determine whether or not the display device is in a wearing state where the display device is worn by a user; a moving state determination unit configured to determine whether the display device is in a stopping state where the display device is stopping or in a moving state where the display device is moving; and a control unit configured to control the display element to be in a lighting enabled state when the display device is in the wearing state and in the moving state.
    Type: Application
    Filed: October 29, 2020
    Publication date: May 13, 2021
    Inventor: Takeshi Iwasa
  • Patent number: 10976802
    Abstract: The present invention aims to appropriately prevent an excessive temperature rise of a portable apparatus according to a situation of a heat release property of the portable apparatus. For such a purpose, there is provided a portable apparatus which comprises: a temperature estimating unit configured to estimate a temperature of the portable apparatus; a heat release property determining unit configured to determine whether or not a heat release property of the portable apparatus satisfies predetermined performance, based on information related to an orientation of the portable apparatus; and a stop controlling unit configured to stop at least a part of functions of the portable apparatus, based on the temperature estimated by the temperature estimating unit and a determination result by the heat release property determining unit.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: April 13, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Takeshi Iwasa
  • Publication number: 20200267376
    Abstract: A synchronization control device includes a detection unit configured to detect at least one of a position and an orientation of the device in a three-dimensional space. The synchronization control device includes one or more image pickup elements, and a control unit configured to control such that a phase of an image capturing timing of the one or more image pickup elements is synchronized with a phase of a detection timing of the detection unit, and a cycle length of the image capturing timing is equal to a cycle length of the detection timing or an integral multiple of the cycle length of the detection tuning.
    Type: Application
    Filed: February 7, 2020
    Publication date: August 20, 2020
    Inventor: Takeshi Iwasa
  • Publication number: 20190361084
    Abstract: The present invention relates to a medical apparatus which includes a motion mechanism which has at least one degree of freedom, an actuator configured to drive the motion mechanism and a control unit configured to control the actuator, and which operates in a magnetic field environment of an MRI, the medical apparatus including: a data storage unit in which data related to magnetic susceptibility of the actuator is stored; a calculating unit configured to calculate information related to an influence which the actuator exerts upon the magnetic field environment by calculation based on the magnetic susceptibility; and a communication unit configured to output the information to the MRI. An influence which an apparatus which operates in a strong magnetic field environment exerts upon an MR image can be reduced.
    Type: Application
    Filed: July 29, 2019
    Publication date: November 28, 2019
    Inventor: Takeshi Iwasa
  • Patent number: 10408909
    Abstract: The present invention relates to a medical apparatus which includes a motion mechanism which has at least one degree of freedom, an actuator configured to drive the motion mechanism and a control unit configured to control the actuator, and which operates in a magnetic field environment of an MRI, the medical apparatus including: a data storage unit in which data related to magnetic susceptibility of the actuator is stored; a calculating unit configured to calculate information related to an influence which the actuator exerts upon the magnetic field environment by calculation based on the magnetic susceptibility; and a communication unit configured to output the information to the MRI. An influence which an apparatus which operates in a strong magnetic field environment exerts upon an MR image can be reduced.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: September 10, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takeshi Iwasa
  • Publication number: 20190138067
    Abstract: The present invention aims to appropriately prevent an excessive temperature rise of a portable apparatus according to a situation of a heat release property of the portable apparatus. For such a purpose, there is provided a portable apparatus which comprises: a temperature estimating unit configured to estimate a temperature of the portable apparatus; a heat release property determining unit configured to determine whether or not a heat release property of the portable apparatus satisfies predetermined performance, based on information related to an orientation of the portable apparatus; and a stop controlling unit configured to stop at least a part of functions of the portable apparatus, based on the temperature estimated by the temperature estimating unit and a determination result by the heat release property determining unit.
    Type: Application
    Filed: October 30, 2018
    Publication date: May 9, 2019
    Inventor: Takeshi Iwasa
  • Publication number: 20160063307
    Abstract: The image acquisition device has a stage that supports the sample, and an imaging unit that has an image forming optical system forming an image of the sample and captures the formed image. The image acquisition device further includes a specimen information acquisition unit that acquires information on presence or absence of a specimen included in the sample based on an imaging result of the imaging unit, and a control unit that moves the stage based on the information on the presence or absence of the specimen.
    Type: Application
    Filed: August 7, 2015
    Publication date: March 3, 2016
    Inventor: Takeshi Iwasa
  • Patent number: 9134672
    Abstract: A recording medium determination apparatus that determines grammage of a recording medium by using an ultrasonic wave includes a transmission unit configured to output an ultrasonic wave having a predetermined frequency, a reception unit configured to receive the ultrasonic wave output from the transmission unit and transmitted through the recording medium and output a received signal, a calculation unit configured to calculate a signal having a peak component according to a cycle of the received signal, and a determination unit configured to determine the grammage of the recording medium based on the signal calculated by the calculation unit.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: September 15, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Iwasa, Tsutomu Ishida
  • Patent number: 9065359
    Abstract: An unnecessary vibration detection apparatus of a vibration type actuator includes an AC voltage generation unit that generates a plurality of AC voltages having a driving frequency; a vibration detection unit that outputs a vibration detection signal of the vibration type actuator; and an unnecessary vibration detection unit that detects an unnecessary vibration component by generating a signal for cancelling the vibration component of the driving frequency in the vibration detection signal by controlling amplitudes of a plurality of AC signals which are used for generating the plurality of AC voltages.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: June 23, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Iwasa, Kenichi Kataoka
  • Patent number: 9054606
    Abstract: A driving device, including a drive signal generating section configured to variably control a frequency or an amplitude of an application voltage to a vibration member, includes a variable period setting section configured to output a value of a PWM period, the set value being set so that an average value of PWM periods in one target period of the application voltage is one fraction of an integer number of the target period by variably adjusting the PWM periods in an aperiodic manner; a drive waveform information output section; and a variable period PWM signal generating section configured to generate a PWM signal based on the set value of the PWM period output from the variable period setting section and drive waveform information of the application voltage, wherein the drive signal generating section is a digital circuit.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: June 9, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Iwasa, Kenichi Kataoka
  • Publication number: 20150150637
    Abstract: The present invention relates to a medical manipulator equipped with a fail-safe mechanism capable of protecting a manipulator in an emergency. A medical manipulator includes a supporting section; a driving section supported by the supporting section and including a vibrating body in which vibration waves are excited by application of an alternating voltage, a movable body that moves relative to the vibrating body by receiving the vibration waves, and a pressurization unit configured to exert pressure between the vibrating body and the movable body; a manipulator section supported by the driving section; an emergency detecting unit configured to detect an emergency; and an interruption unit configured to interrupt transmission of torque between the manipulator section and the supporting section on the basis of an emergency detection signal transmitted from the emergency detecting unit.
    Type: Application
    Filed: June 4, 2013
    Publication date: June 4, 2015
    Inventor: Takeshi Iwasa
  • Publication number: 20150153435
    Abstract: The present invention relates to a medical apparatus which includes a motion mechanism which has at least one degree of freedom, an actuator configured to drive the motion mechanism and a control unit configured to control the actuator, and which operates in a magnetic field environment of an MRI, the medical apparatus including: a data storage unit in which data related to magnetic susceptibility of the actuator is stored; a calculating unit configured to calculate information related to an influence which the actuator exerts upon the magnetic field environment by calculation based on the magnetic susceptibility; and a communication unit configured to output the information to the MRI. An influence which an apparatus which operates in a strong magnetic field environment exerts upon an MR image can be reduced.
    Type: Application
    Filed: May 22, 2013
    Publication date: June 4, 2015
    Inventor: Takeshi Iwasa
  • Publication number: 20140270825
    Abstract: A recording medium determination apparatus that determines grammage of a recording medium by using an ultrasonic wave includes a transmission unit configured to output an ultrasonic wave having a predetermined frequency, a reception unit configured to receive the ultrasonic wave output from the transmission unit and transmitted through the recording medium and output a received signal, a calculation unit configured to calculate a signal having a peak component according to a cycle of the received signal, and a determination unit configured to determine the grammage of the recording medium based on the signal calculated by the calculation unit.
    Type: Application
    Filed: May 28, 2014
    Publication date: September 18, 2014
    Inventors: Takeshi Iwasa, Tsutomu Ishida
  • Patent number: 8774653
    Abstract: A recording medium determination apparatus that determines grammage of a recording medium by using an ultrasonic wave includes a transmission unit configured to output an ultrasonic wave having a predetermined frequency, a reception unit configured to receive the ultrasonic wave output from the transmission unit and transmitted through the recording medium and output a received signal, a calculation unit configured to calculate a signal having a peak component according to a cycle of the received signal, and a determination unit configured to determine the grammage of the recording medium based on the signal calculated by the calculation unit.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: July 8, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Iwasa, Tsutomu Ishida
  • Publication number: 20130334988
    Abstract: A driving device, including a drive signal generating section configured to variably control a frequency or an amplitude of an application voltage to a vibration member, including: a variable period setting section configured to output a value of a PWM period, the set value being set so that an average value of PWM periods in one target period of the application voltage is one fraction of an integer number of the target period by variably adjusting the PWM periods in an aperiodic manner; a drive waveform information output section; and a variable period PWM signal generating section configured to generate a PWM signal based on the set value of the PWM period output from the variable period setting section and drive waveform information of the application voltage, wherein the drive signal generating section is a digital circuit.
    Type: Application
    Filed: June 6, 2013
    Publication date: December 19, 2013
    Inventors: Takeshi Iwasa, Kenichi Kataoka
  • Publication number: 20130334405
    Abstract: An optical receiving circuit of an embodiment of the present invention includes a photo detector configured to receive an optical pulse signal and a load connected to the photo detector. A circuit comprises the photo detector and a resistance component of the load. This circuit is configured to output a non-pulse signal.
    Type: Application
    Filed: June 11, 2013
    Publication date: December 19, 2013
    Inventor: Takeshi Iwasa
  • Publication number: 20130241446
    Abstract: An unnecessary vibration detection apparatus of a vibration type actuator includes an AC voltage generation unit that generates a plurality of AC voltages having a driving frequency; a vibration detection unit that outputs a vibration detection signal of the vibration type actuator; and an unnecessary vibration detection unit that detects an unnecessary vibration component by generating a signal for cancelling the vibration component of the driving frequency in the vibration detection signal by controlling amplitudes of a plurality of AC signals which are used for generating the plurality of AC voltages.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 19, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takeshi Iwasa, Kenichi Kataoka
  • Patent number: 8294315
    Abstract: An inner-rotor brushless motor includes a holding member configured to hold a stator core. The holding member includes a mounting surface disposed perpendicular to a shaft and brought into contact with a mating member in which the inner-rotor brushless motor is installed; bent portions integrated with the mounting surface, bent upward so as to be substantially perpendicular to the mounting surface, and configured to hold the outer circumferential surface of the stator core; and mounting flanges used for fastening the motor to the mating member. The mounting surface, the bent portions, and the mounting flanges are integrated with each other.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: October 23, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takeshi Iwasa, Hiromasa Masuta