Patents by Inventor Naoki Matsushita

Naoki Matsushita 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: 20240034073
    Abstract: An image forming apparatus includes a photosensitive member and a scanning unit including a light source, a rotatable polygonal mirror, and a sensor. The image forming apparatus includes setting of an operation in a first mode and setting of an operation in a second mode. The image forming apparatus further comprises, a surface identifying portion and a correction data storing portion configured to prestore correction data including first correction data for a first rotational speed and second correction data for a second rotational speed. Positional deviation in a main scan direction of laser light is corrected on the basis of the first correction data or the second correction data.
    Type: Application
    Filed: October 12, 2023
    Publication date: February 1, 2024
    Inventors: Yoshihiko Tanaka, Mitsuhiro Ohta, Takatoshi Tanaka, Fumihiko Yamaya, Naoki Matsushita, Hiroki Katayama
  • Patent number: 11852988
    Abstract: An image forming apparatus to form an image on a recording material includes a photosensitive member, an exposure device to form a latent image on the photosensitive member, a tubular body defining a space in which at least a part of the exposure device is contained, and a support portion that supports the exposure device and is provided along a rotation axis direction of the photosensitive member in the space of the tubular body. The image forming apparatus further includes, in the rotation axis direction, a first side plate fixed to one end portion of the tubular body, and a second side plate fixed to another end portion of the tubular body. One support portion end portion in the rotation axis direction is fixed to the first side plate, and another support portion end portion in the rotation axis direction is fixed to the second side plate.
    Type: Grant
    Filed: May 5, 2022
    Date of Patent: December 26, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shoji Yamamoto, Akira Yoshimura, Shogo Nagamine, Naoki Matsushita, Yoshihiko Tanaka, Hisanori Kobayashi, Takatoshi Tanaka, Mitsuhiro Ohta, Hiroki Katayama, Akitoshi Toyota
  • Patent number: 11837288
    Abstract: According to one embodiment, a memory device includes: a memory cell including a memory element and a switching element; and a circuit that applies a first write pulse having a first polarity to the memory cell at the time of writing first data in the memory cell and applies a second write pulse having a second polarity different from the first polarity to the memory cell at the time of writing second data in the memory cell. The switching element has polarity dependence according to the first and second polarities.
    Type: Grant
    Filed: September 9, 2021
    Date of Patent: December 5, 2023
    Assignee: Kioxia Corporation
    Inventor: Naoki Matsushita
  • Patent number: 11820158
    Abstract: An image forming apparatus includes a photosensitive member and a scanning unit including a light source, a rotatable polygonal mirror, and a sensor. The image forming apparatus includes setting of an operation in a first mode and setting of an operation in a second mode. The image forming apparatus further comprises, a surface identifying portion and a correction data storing portion configured to prestore correction data including first correction data for a first rotational speed and second correction data for a second rotational speed. Positional deviation in a main scan direction of laser light is corrected on the basis of the first correction data or the second correction data.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: November 21, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshihiko Tanaka, Mitsuhiro Ohta, Takatoshi Tanaka, Fumihiko Yamaya, Naoki Matsushita, Hiroki Katayama
  • Patent number: 11714372
    Abstract: In an image forming apparatus, a lifetime detection unit acquires an activation time threshold using a threshold stored in an activation time storage unit and an environmental temperature detected by a temperature detection unit, and, in a case where activation time acquired by an activation time acquisition unit is shorter than the activation time threshold, makes a notification of at least one of a lifetime or replacement of a deflection unit or an optical scanning unit.
    Type: Grant
    Filed: February 17, 2022
    Date of Patent: August 1, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takatoshi Tanaka, Yoshihiko Tanaka, Naoki Matsushita
  • Patent number: 11703776
    Abstract: A light deflector includes a rotary polygon mirror and a motor to rotate the rotary polygon mirror. The rotary polygon mirror includes reflecting surfaces to reflect light emitted from a light source and a hole portion provided in a rotational axis direction. The motor includes a shaft portion in the hole portion and a support member supporting the rotary polygon mirror. The support member is fixed to, and coaxial with, the shaft portion, and includes an insertion portion in the hole portion. The rotary polygon mirror includes a protruded portion near the hole portion and protruding from at least one reflecting surface orthogonal to the rotational axis direction. The protruded portion includes a fitting portion fitted to the shaft portion or the support member and in which a portion continued from a hole portion surface is protruded toward the rotation center more than the surface forming the hole portion.
    Type: Grant
    Filed: November 2, 2021
    Date of Patent: July 18, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takatoshi Tanaka, Yoshihiko Tanaka, Naoki Matsushita
  • Patent number: 11685393
    Abstract: A vehicle automated driving system 100 comprises a surrounding environment information acquiring device 10, a vehicle information acquiring device 20, a driver information acquiring device 30, a package selecting part 90, a package proposing part 91, an automated driving executing part 92, and a rejection count detecting part 93. The package selecting part determines the driving assistance package based on at least one of the surrounding environment information, the vehicle information, and the driver information, selects the determined driving assistance package if the rejection count of the determined driving assistance package is less than a predetermined threshold value, and selects a driving assistance package different from the determined driving assistance package if the rejection count of the determined driving assistance package is the threshold value or more.
    Type: Grant
    Filed: December 6, 2022
    Date of Patent: June 27, 2023
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuichi Kumai, Naoki Matsushita, Masaki Matsunaga
  • Publication number: 20230123657
    Abstract: A vehicle automated driving system 100 comprises a surrounding environment information acquiring device 10, a vehicle information acquiring device 20, a driver information acquiring device 30, a package selecting part 90, a package proposing part 91, an automated driving executing part 92, and a rejection count detecting part 93. The package selecting part determines the driving assistance package based on at least one of the surrounding environment information, the vehicle information, and the driver information, selects the determined driving assistance package if the rejection count of the determined driving assistance package is less than a predetermined threshold value, and selects a driving assistance package different from the determined driving assistance package if the rejection count of the determined driving assistance package is the threshold value or more.
    Type: Application
    Filed: December 6, 2022
    Publication date: April 20, 2023
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuichi KUMAI, Naoki Matsushita, Masaki Matsunaga
  • Publication number: 20230073548
    Abstract: According to one embodiment, a memory device includes a memory cell that includes a resistance change element and a switching element that are coupled in series; and a control circuit configured to perform a first operation to bring the resistance change element to a first resistance value based on a first current, a second operation to bring the resistance change element to a second resistance value different from the first resistance value based on a second current, and a third operation to determine whether the resistance change element is at the first resistance value or the second resistance value based on a third current. The control circuit is configured to pass two currents having different polarities alternately in the memory cell in a single operation.
    Type: Application
    Filed: November 29, 2021
    Publication date: March 9, 2023
    Applicant: Kioxia Corporation
    Inventor: Naoki MATSUSHITA
  • Patent number: 11529964
    Abstract: A vehicle automated driving system 100 comprises a surrounding environment information acquiring device 10, a vehicle information acquiring device 20, a driver information acquiring device 30, a package selecting part 90, a package proposing part 91, an automated driving executing part 92, and a rejection count detecting part 93. The package selecting part determines the driving assistance package based on at least one of the surrounding environment information, the vehicle information, and the driver information, selects the determined driving assistance package if the rejection count of the determined driving assistance package is less than a predetermined threshold value, and selects a driving assistance package different from the determined driving assistance package if the rejection count of the determined driving assistance package is the threshold value or more.
    Type: Grant
    Filed: November 24, 2021
    Date of Patent: December 20, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuichi Kumai, Naoki Matsushita, Masaki Matsunaga
  • Patent number: 11505201
    Abstract: A vehicle automated driving system 100 comprises a surrounding environment information acquiring device 10, a vehicle information acquiring device 20, a driver information acquiring device 30, a package selecting part 90, a package proposing part 91, an automated driving executing part 92, and a rejection count detecting part 93. The package selecting part determines the driving assistance package based on at least one of the surrounding environment information, the vehicle information, and the driver information, selects the determined driving assistance package if the rejection count of the determined driving assistance package is less than a predetermined threshold value, and selects a driving assistance package different from the determined driving assistance package if the rejection count of the determined driving assistance package is the threshold value or more.
    Type: Grant
    Filed: October 29, 2021
    Date of Patent: November 22, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuichi Kumai, Naoki Matsushita, Masaki Matsunaga
  • Publication number: 20220293176
    Abstract: According to one embodiment, a memory device includes: a memory cell including a memory element and a switching element; and a circuit that applies a first write pulse having a first polarity to the memory cell at the time of writing first data in the memory cell and applies a second write pulse having a second polarity different from the first polarity to the memory cell at the time of writing second data in the memory cell. The switching element has polarity dependence according to the first and second polarities.
    Type: Application
    Filed: September 9, 2021
    Publication date: September 15, 2022
    Applicant: Kioxia Corporation
    Inventor: Naoki MATSUSHITA
  • Publication number: 20220276599
    Abstract: In an image forming apparatus, a lifetime detection unit acquires an activation time threshold using a threshold stored in an activation time storage unit and an environmental temperature detected by a temperature detection unit, and, in a case where activation time acquired by an activation time acquisition unit is shorter than the activation time threshold, makes a notification of at least one of a lifetime or replacement of a deflection unit or an optical scanning unit.
    Type: Application
    Filed: February 17, 2022
    Publication date: September 1, 2022
    Inventors: Takatoshi Tanaka, Yoshihiko Tanaka, Naoki Matsushita
  • Publication number: 20220260938
    Abstract: An image forming apparatus to form an image on a recording material includes a photosensitive member, an exposure device to form a latent image on the photosensitive member, a tubular body defining a space in which at least a part of the exposure device is contained, and a support portion that supports the exposure device and is provided along a rotation axis direction of the photosensitive member in the space of the tubular body. The image forming apparatus further includes, in the rotation axis direction, a first side plate fixed to one end portion of the tubular body, and a second side plate fixed to another end portion of the tubular body. One support portion end portion in the rotation axis direction is fixed to the first side plate, and another support portion end portion in the rotation axis direction is fixed to the second side plate.
    Type: Application
    Filed: May 5, 2022
    Publication date: August 18, 2022
    Inventors: Shoji Yamamoto, Akira Yoshimura, Shogo Nagamine, Naoki Matsushita, Yoshihiko Tanaka, Hisanori Kobayashi, Takatoshi Tanaka, Mitsuhiro Ohta, Hiroki Katayama, Akitoshi Toyota
  • Patent number: 11385457
    Abstract: In an optical scanning device, an outer wall closest to a circumscribed circle of a rotating polygon mirror has a space in a position facing to a position of a reflection surface of the rotating polygon mirror in an axial direction of a rotating shaft. A part of a cover is provided in a position farther from the circumscribed circle than the outer wall so as to close the space, when the optical scanning device is viewed in a direction perpendicular to the axial direction of the rotating shaft.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: July 12, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yoshihiko Tanaka, Hisanori Kobayashi, Naoki Matsushita, Takatoshi Tanaka, Mitsuhiro Ohta, Hiroki Katayama
  • Patent number: 11383413
    Abstract: A manufacturing method of a polygonal mirror using a metal mold including a first mold, a second mold, a third mold, and a fourth mold includes a step of forming the molded member by providing the third mold and the fourth mold between the first mold and the second mold in a state in which the third mold and the fourth mold are in contact with each other and then by injecting a resin material into the metal mold, and a step of separating the third mold from the first crossing surface of the molded member in a direction crossing the first crossing surface.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: July 12, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Fumihiko Yamaya, Hiroki Katayama, Yoshihiko Tanaka, Takatoshi Tanaka, Mitsuhiro Ohta, Atsushi Takata, Naoki Matsushita
  • Patent number: 11366310
    Abstract: A polygonal mirror includes reflecting surfaces, a molded member including a first surface and a second surface, a contact portion, and gate marks. Each of said first surface and said second surface has a polygonal shape. The contact portion and the gate marks are formed at non-overlapping positions with a line segment connecting a vertex of the polygonal shape with a rotation center. The gate marks and the reflecting surfaces are the same in number. A perpendicular bisector of a line segment connecting centers of the gate marks adjacent to each other with respect to a rotational direction of the polygonal mirror is formed at a position passing through an associated vertex of the polygonal shape and the rotation center.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: June 21, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Naoki Matsushita, Atsushi Takata, Yoshihiko Tanaka, Takatoshi Tanaka, Fumihiko Yamaya, Mitsuhiro Ohta, Hiroki Katayama
  • Patent number: 11353805
    Abstract: An image forming apparatus to form an image on a recording material includes a photosensitive member, an exposure device to form a latent image on the photosensitive member, a tubular body defining a space in which at least a part of the exposure device is contained, and a support portion that supports the exposure device and is provided along a rotation axis direction of the photosensitive member in the space of the tubular body. The image forming apparatus further includes, in the rotation axis direction, a first side plate fixed to one end portion of the tubular body, and a second side plate fixed to another end portion of the tubular body. One support portion end portion in the rotation axis direction is fixed to the first side plate, and another support portion end portion in the rotation axis direction is fixed to the second side plate.
    Type: Grant
    Filed: May 3, 2021
    Date of Patent: June 7, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shoji Yamamoto, Akira Yoshimura, Shogo Nagamine, Naoki Matsushita, Yoshihiko Tanaka, Hisanori Kobayashi, Takatoshi Tanaka, Mitsuhiro Ohta, Hiroki Katayama, Akitoshi Toyota
  • Patent number: 11338820
    Abstract: A vehicle automated driving system 100 comprises a surrounding environment information acquiring device 10, a vehicle information acquiring device 20, a driver information acquiring device 30, a package selecting part 90, a package proposing part 91, an automated driving executing part 92, and a rejection count detecting part 93. The package selecting part determines the driving assistance package based on at least one of the surrounding environment information, the vehicle information, and the driver information, selects the determined driving assistance package if the rejection count of the determined driving assistance package is less than a predetermined threshold value, and selects a driving assistance package different from the determined driving assistance package if the rejection count of the determined driving assistance package is the threshold value or more.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: May 24, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuichi Kumai, Naoki Matsushita, Masaki Matsunaga
  • Publication number: 20220137528
    Abstract: A light deflector includes a rotary polygon mirror and a motor to rotate the rotary polygon mirror. The rotary polygon mirror includes reflecting surfaces to reflect light emitted from a light source and a hole portion provided in a rotational axis direction. The motor includes a shaft portion in the hole portion and a support member supporting the rotary polygon mirror. The support member is fixed to, and coaxial with, the shaft portion, and includes an insertion portion in the hole portion. The rotary polygon mirror includes a protruded portion near the hole portion and protruding from at least one reflecting surface orthogonal to the rotational axis direction. The protruded portion includes a fitting portion fitted to the shaft portion or the support member and in which a portion continued from a hole portion surface is protruded toward the rotation center more than the surface forming the hole portion.
    Type: Application
    Filed: November 2, 2021
    Publication date: May 5, 2022
    Inventors: Takatoshi Tanaka, Yoshihiko Tanaka, Naoki Matsushita