Patents by Inventor Fumiaki Mizuno

Fumiaki Mizuno 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: 20210265816
    Abstract: A laser emitting device has a constant current source, a single charging capacitor, and one or more laser emitters. The constant current source supplies a charging current to the single charging capacitor to charge the single charging capacitor. Each of the laser emitter has a laser diode and a drive circuit. Each laser diode emits laser light in response to a power supplied from the single charging capacitor. A charging current to be supplied to the single charging capacitor is less than a threshold current of the laser diode in each of the laser emitters.
    Type: Application
    Filed: February 18, 2021
    Publication date: August 26, 2021
    Inventor: Fumiaki MIZUNO
  • Publication number: 20210240066
    Abstract: An optical detector includes a light emitter having a light emitting window extended in an extension direction to emit a projection beam from the light emitting window toward a measurement area and to detect a return beam from the measurement area. The optical detector includes a scanning mirror that scans by reflecting the projection beam. The scanning mirror swings within a finite angular range around a rotation axis that is along a direction corresponding to the extension direction.
    Type: Application
    Filed: January 28, 2021
    Publication date: August 5, 2021
    Inventors: Mitsuhiro Kiyono, Kenichi Yanai, Teiyuu Kimura, Noriyuki Ozaki, Shinji Kashiwada, Fumiaki Mizuno, Kazuhisa Onda
  • Publication number: 20210239802
    Abstract: An optical detector is configured to project a projection beam toward a measurement area and detect a return beam from the measurement area. The optical detector includes: a projecting optical system that forms a projection optical axis to project the projection beam; a receiving optical system that forms a receiving optical axis to receive the return beam, and a housing having a housing chamber to house the projecting optical system and the receiving optical system, and an optical window for the projection beam and the return beam to travel between the housing chamber and the measurement area. The projection optical axis and the receiving optical axis are offset from each other to define an overlap region inside the housing chamber where footprints of the projection beam and the return beam overlap with each other.
    Type: Application
    Filed: January 28, 2021
    Publication date: August 5, 2021
    Inventors: Mitsuhiro Kiyono, Teiyuu Kimura, Noriyuki Ozaki, Kenichi Yanai, Shinji Kashiwada, Fumiaki Mizuno, Kazuhisa Onda
  • Publication number: 20210149026
    Abstract: An optical distance measuring device includes a light emitting element in which a plurality of light emitting units 16 that emit light are arranged so that a gap is present between adjacent ones of the light emitting units, a transmission unit through which the light is transmitted, a drive unit that changes a positional relationship between the light emitting element and the transmission unit, and a light receiving unit that receives reflected light of the light. The drive unit changes the positional relationship between the light emitting element and the transmission unit, thereby changing an irradiation path of the light along an arrangement direction.
    Type: Application
    Filed: December 30, 2020
    Publication date: May 20, 2021
    Inventors: Hitoshi YAMADA, Yoshiaki HOASHI, Fumiaki MIZUNO, Noriyuki OZAKI, Akifumi UENO
  • Patent number: 10915037
    Abstract: An image forming apparatus includes: an image carrier; a light source configured to emit light for exposing the image carrier; a controller configured to control a light intensity of the light source; a reference current generator configured to generate a reference current based on a target light intensity of the light source, the target light intensity being set by the controller; a correction current generator configured to generate a correction current for correcting the reference current based on an amount of correction that is set by the controller, and on the target light intensity; and a driver configured to drive the light source using a drive current that corresponds to a difference between the reference current and the correction current.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: February 9, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Eriko Odagiri, Fumiaki Mizuno
  • Patent number: 10364109
    Abstract: The feeding apparatus includes a pick-up roller, a feed roller, a separation roller which forms a separation nip portion with the feed roller, an encoder, and an engine control unit. The engine control unit obtains variation in rotation speed of the separation roller based on a detection result of the encoder, and determines a life condition of the separation roller based on the obtained variation in rotation speed of the separation roller.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: July 30, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuya Hirano, Fumiaki Mizuno
  • Patent number: 10329106
    Abstract: A sheet feeding device includes a stacking portion, a first roller, a second roller, a third roller rotatable to provide peripheral movement in a predetermined direction and to provide peripheral movement in a direction opposite to the predetermined direction, a detecting unit, a driving unit for executing a feeding operation by the first roller, and a control unit for providing an instruction to the driving unit so as to continue or stop the feeding operation. The predetermined rotational frequency is larger than 0 and is smaller than a rotational frequency of the third roller in a period in which the third roller is rotated in the predetermined direction in a state in which a single recording material is fed to the nip.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: June 25, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Kawarago, Fumiaki Mizuno, Yuta Hojo, Takao Nada
  • Patent number: 10095155
    Abstract: An apparatus has a detection unit, a rotating polygonal mirror and a generation unit. The rotating polygonal mirror has reflecting surfaces and configured to deflect light. The detection unit outputs a first signal in accordance with detecting the light. The generation unit, based on the first signal, generates a second signal which is a main scanning synchronization signal for controlling a write start in a main scanning direction. The second signal has a first waveform and a second waveform. The first waveform does not correspond to a reference reflection surface. The second waveform corresponds to the reference reflection surface and is different to the first waveform.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: October 9, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tatsuya Hotogi, Fumiaki Mizuno
  • Publication number: 20180222705
    Abstract: The feeding apparatus includes a pick-up roller, a feed roller, a separation roller which forms a separation nip portion with the feed roller, an encoder, and an engine control unit. The engine control unit obtains variation in rotation speed of the separation roller based on a detection result of the encoder, and determines a life condition of the separation roller based on the obtained variation in rotation speed of the separation roller.
    Type: Application
    Filed: January 31, 2018
    Publication date: August 9, 2018
    Inventors: Yuya Hirano, Fumiaki Mizuno
  • Patent number: 9944480
    Abstract: An image forming apparatus includes an accommodation unit, feeding, conveying, and separating members, and detecting, control, image forming, and regulating units. The conveying member conveys a fed recording material. The separating member forms a nip and separates recording materials. The detecting unit detects that the recording material has been fed to the nip. The feeding member starts feeding an accommodated recording material and, where a recording material is fed to the nip, causes the feeding to be finished. An image is formed on a fed recording material. The regulating unit regulates an end on an upstream side. The control unit measures a period from a recording material feeding to detection that a recording material is fed to the nip. Based on the measured period, information is output indicating that a position of the regulating unit is deviated from a position according to a size of the accommodated recording materials.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: April 17, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuya Hirano, Fumiaki Mizuno, Yuta Hojo, Atsushi Kawarago
  • Patent number: 9921517
    Abstract: An image forming apparatus includes: a detection unit configured to detect light that a light source emits and that is reflected by a polygon mirror in a predetermined direction, and to output a synchronization signal; a speed control unit configured to perform acceleration/deceleration control of the polygon mirror based on the synchronization signal at a target speed; and a light intensity control unit configured to decide an emission intensity of the light source and notify the digital value to the light driving unit. The speed control unit changes control of the polygon mirror to a neutral control in which neither acceleration nor deceleration control is performed in a case the light intensity control unit changes the light intensity of the light source when the speed control unit is performing the acceleration/deceleration control.
    Type: Grant
    Filed: April 19, 2017
    Date of Patent: March 20, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Fumiaki Mizuno
  • Publication number: 20180074430
    Abstract: An image forming apparatus includes: an image carrier; a light source configured to emit light for exposing the image carrier; a controller configured to control a light intensity of the light source; a reference current generator configured to generate a reference current based on a target light intensity of the light source, the target light intensity being set by the controller; a correction current generator configured to generate a correction current for correcting the reference current based on an amount of correction that is set by the controller, and on the target light intensity; and a driver configured to drive the light source using a drive current that corresponds to a difference between the reference current and the correction current.
    Type: Application
    Filed: August 1, 2017
    Publication date: March 15, 2018
    Inventors: Eriko Odagiri, Fumiaki Mizuno
  • Publication number: 20180024461
    Abstract: An apparatus has a detection unit, a rotating polygonal mirror and a generation unit. The rotating polygonal mirror has reflecting surfaces and configured to deflect light. The detection unit outputs a first signal in accordance with detecting the light. The generation unit, based on the first signal, generates a second signal which is a main scanning synchronization signal for controlling a write start in a main scanning direction. The second signal has a first waveform and a second waveform. The first waveform does not correspond to a reference reflection surface. The second waveform corresponds to the reference reflection surface and is different to the first waveform.
    Type: Application
    Filed: June 27, 2017
    Publication date: January 25, 2018
    Inventors: Tatsuya Hotogi, Fumiaki Mizuno
  • Publication number: 20170336732
    Abstract: An image forming apparatus includes: a detection unit configured to detect light that a light source emits and that is reflected by a polygon mirror in a predetermined direction, and to output a synchronization signal; a speed control unit configured to perform acceleration/deceleration control of the polygon mirror based on the synchronization signal at a target speed; and a light intensity control unit configured to decide an emission intensity of the light source and notify the digital value to the light driving unit. The speed control unit changes control of the polygon mirror to a neutral control in which neither acceleration nor deceleration control is performed in a case the light intensity control unit changes the light intensity of the light source when the speed control unit is performing the acceleration/deceleration control.
    Type: Application
    Filed: April 19, 2017
    Publication date: November 23, 2017
    Inventor: Fumiaki Mizuno
  • Publication number: 20170267475
    Abstract: An image forming apparatus includes an accommodation unit, feeding, conveying, and separating members, and detecting, control, image forming, and regulating units. The conveying member conveys a fed recording material. The separating member forms a nip and separates recording materials. The detecting unit detects that the recording material has been fed to the nip. The feeding member starts feeding an accommodated recording material and, where a recording material is fed to the nip, causes the feeding to be finished. An image is formed on a fed recording material. The regulating unit regulates an end on an upstream side. The control unit measures a period from a recording material feeding to detection that a recording material is fed to the nip. Based on the measured period, information is output indicating that a position of the regulating unit is deviated from a position according to a size of the accommodated recording materials.
    Type: Application
    Filed: March 8, 2017
    Publication date: September 21, 2017
    Inventors: Yuya Hirano, Fumiaki Mizuno, Yuta Hojo, Atsushi Kawarago
  • Publication number: 20170166411
    Abstract: A sheet feeding device includes a stacking portion, a first roller, a second roller, a third roller rotatable to provide peripheral movement in a predetermined direction and to provide peripheral movement in a direction opposite to the predetermined direction, a detecting unit, a driving unit for executing a feeding operation by the first roller, and a control unit for providing an instruction to the driving unit so as to continue or stop the feeding operation. The predetermined rotational frequency is larger than 0 and is smaller than a rotational frequency of the third roller in a period in which the third roller is rotated in the predetermined direction in a state in which a single recording material is fed to the nip.
    Type: Application
    Filed: December 6, 2016
    Publication date: June 15, 2017
    Inventors: Atsushi Kawarago, Fumiaki Mizuno, Yuta Hojo, Takao Nada
  • Patent number: 9141057
    Abstract: The switching control apparatus includes a switching driving unit for turning on and off the switch, a control-purpose power supply for outputting electric power, a power transmission unit provided between the switching driving unit and the control-purpose power supply, for supplying or cutting off electric power from the control-purpose power supply to the switching driving unit, and a control unit for controlling the power transmission unit. The control unit controls the switching driving unit to turn the switch on or off, during a period in which the electric power from the power supply to the switching driving unit is cut off by the power transmission unit, or supplied from the power supply to the switching driving unit.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: September 22, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuji Fujiwara, Fumiaki Mizuno, Yuka Fukasawa
  • Patent number: 9025975
    Abstract: A switching power source is provided, which includes, a transformer, a switching unit configured to switch a voltage supplied to a primary side of the transformer, and an output unit configured to output a voltage generated at a secondary side of the transformer, wherein a switching cycle of the switching unit is set to be a predetermined period of time when the output unit outputs a first voltage, a first period of time and a second period of time are set to be longer than the predetermined period of time and are set to be different from each other.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: May 5, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuki Nakajima, Fumiaki Mizuno
  • Publication number: 20140341603
    Abstract: The switching control apparatus includes a switching driving unit for turning on and off the switch, a control-purpose power supply for outputting electric power, a power transmission unit provided between the switching driving unit and the control-purpose power supply, for supplying or cutting off electric power from the control-purpose power supply to the switching driving unit, and a control unit for controlling the power transmission unit. The control unit controls the switching driving unit to turn the switch on or off, during a period in which the electric power from the power supply to the switching driving unit is cut off by the power transmission unit, or supplied from the power supply to the switching driving unit.
    Type: Application
    Filed: May 2, 2014
    Publication date: November 20, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yuji Fujiwara, Fumiaki Mizuno, Yuka Fukasawa
  • Publication number: 20110316352
    Abstract: An apparatus including: a device connector to which an external device is to be connected; and a power source configured to supply electric power to the device connector. In response to turn-ON of a switch when the external device is connected, electric power is started to be supplied from the power source to the device connector.
    Type: Application
    Filed: June 13, 2011
    Publication date: December 29, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Shinji Kubo, Fumiaki Mizuno