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).
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Publication number: 20240111225Abstract: A rotatable polygon mirror includes a plurality of reflecting surfaces provided in parallel to a rotational axis direction, first surface and second surface of polygonal shape perpendicular to the plurality of reflecting surface and of which each side is continued to the plurality of reflecting surfaces. The second surface is opposite to the first surface. A through hole penetrates though the first and second surfaces in parallel to the rotational axis direction and to engage with a rotational shaft of a driving portion. As seen in the rotational axis direction, the through hole has substantially similar shape to the polygonal shape of the first and the second surfaces, and vertexes of the similar shape of the through hole are different in phase from apexes of the polygonal shape of the first and second surfaces with respect to a rotational direction of the polygon mirror.Type: ApplicationFiled: September 5, 2023Publication date: April 4, 2024Inventors: HISANORI KOBAYASHI, YOSHIHIKO TANAKA, Takatoshi Tanaka, NAOKI MATSUSHITA
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Publication number: 20240103264Abstract: An optical deflector includes a rotatable polygon mirror and an urging member to urge the rotatable polygon mirror toward a driving unit to fix the rotatable polygon mirror to the driving unit. The urging member includes an annular shape portion having an annular shape surface contacting the rotatable polygon mirror and a plurality of arm portions integrally formed with the annular shape portion. The plurality of the arm portions radially extend from an outer circumference of the annular shape portion, are disposed at equal intervals with respect to a rotational direction with a rotation center of the rotatable polygon mirror, and are pressed by a restricting member.Type: ApplicationFiled: July 25, 2023Publication date: March 28, 2024Inventors: NAOKI MATSUSHITA, Takatoshi Tanaka, YOSHIHIKO TANAKA
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Publication number: 20240103265Abstract: A rotatable polygon mirror molded with a resin includes a plurality of reflecting surfaces provided in parallel to a rotational axis direction, a surface perpendicular to the rotational axis direction; a plurality of gate portions provided on the surface and a recess-projection on the surface. The recess-projection has at least one shape of a recess shape recessed in the rotational axis from the and a projection shape projected from the surface as viewed in a direction perpendicular to the rotational axis direction. The recess-projection is provided in a virtual straight line with equal distances from two of the adjacent gate portions with respect to a rotational direction of the rotatable polygon mirror and connecting a rotation center of the rotatable polygon mirror and a boundary of two of the adjacent reflecting surfaces with respect to the rotational direction.Type: ApplicationFiled: August 30, 2023Publication date: March 28, 2024Inventors: TAKATOSHI TANAKA, ATSUSHI TAKATA, YOSHIHIKO TANAKA, NAOKI MATSUSHITA
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Publication number: 20240087629Abstract: According to one embodiment, a memory device includes first interconnects in a first direction, second interconnects in a second direction intersecting the first direction, and memory cells. Each of the memory cells is associated with a set of one of the first interconnects and one of the second interconnects between the first interconnects and the second interconnects and includes a variable resistance element and a switching element which are coupled in series. A forming method of the memory device includes: selecting a memory cell having a highest interconnect resistance from memory cells on which a forming process has not been performed; performing a forming process on a switching element in the selected memory cell; and repeating the selecting and the performing on the memory cells.Type: ApplicationFiled: March 7, 2023Publication date: March 14, 2024Applicant: Kioxia CorporationInventor: Naoki MATSUSHITA
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Publication number: 20240034073Abstract: 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: ApplicationFiled: October 12, 2023Publication date: February 1, 2024Inventors: Yoshihiko Tanaka, Mitsuhiro Ohta, Takatoshi Tanaka, Fumihiko Yamaya, Naoki Matsushita, Hiroki Katayama
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Patent number: 11852988Abstract: 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: GrantFiled: May 5, 2022Date of Patent: December 26, 2023Assignee: Canon Kabushiki KaishaInventors: Shoji Yamamoto, Akira Yoshimura, Shogo Nagamine, Naoki Matsushita, Yoshihiko Tanaka, Hisanori Kobayashi, Takatoshi Tanaka, Mitsuhiro Ohta, Hiroki Katayama, Akitoshi Toyota
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Patent number: 11837288Abstract: 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: GrantFiled: September 9, 2021Date of Patent: December 5, 2023Assignee: Kioxia CorporationInventor: Naoki Matsushita
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Patent number: 11820158Abstract: 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: GrantFiled: October 16, 2019Date of Patent: November 21, 2023Assignee: Canon Kabushiki KaishaInventors: Yoshihiko Tanaka, Mitsuhiro Ohta, Takatoshi Tanaka, Fumihiko Yamaya, Naoki Matsushita, Hiroki Katayama
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Patent number: 11714372Abstract: 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: GrantFiled: February 17, 2022Date of Patent: August 1, 2023Assignee: Canon Kabushiki KaishaInventors: Takatoshi Tanaka, Yoshihiko Tanaka, Naoki Matsushita
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Patent number: 11703776Abstract: 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: GrantFiled: November 2, 2021Date of Patent: July 18, 2023Assignee: Canon Kabushiki KaishaInventors: Takatoshi Tanaka, Yoshihiko Tanaka, Naoki Matsushita
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Patent number: 11685393Abstract: 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: GrantFiled: December 6, 2022Date of Patent: June 27, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuichi Kumai, Naoki Matsushita, Masaki Matsunaga
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Publication number: 20230123657Abstract: 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: ApplicationFiled: December 6, 2022Publication date: April 20, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuichi KUMAI, Naoki Matsushita, Masaki Matsunaga
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Publication number: 20230073548Abstract: 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: ApplicationFiled: November 29, 2021Publication date: March 9, 2023Applicant: Kioxia CorporationInventor: Naoki MATSUSHITA
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Patent number: 11529964Abstract: 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: GrantFiled: November 24, 2021Date of Patent: December 20, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuichi Kumai, Naoki Matsushita, Masaki Matsunaga
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Patent number: 11505201Abstract: 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: GrantFiled: October 29, 2021Date of Patent: November 22, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuichi Kumai, Naoki Matsushita, Masaki Matsunaga
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Publication number: 20220293176Abstract: 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: ApplicationFiled: September 9, 2021Publication date: September 15, 2022Applicant: Kioxia CorporationInventor: Naoki MATSUSHITA
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Publication number: 20220276599Abstract: 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: ApplicationFiled: February 17, 2022Publication date: September 1, 2022Inventors: Takatoshi Tanaka, Yoshihiko Tanaka, Naoki Matsushita
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Publication number: 20220260938Abstract: 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: ApplicationFiled: May 5, 2022Publication date: August 18, 2022Inventors: Shoji Yamamoto, Akira Yoshimura, Shogo Nagamine, Naoki Matsushita, Yoshihiko Tanaka, Hisanori Kobayashi, Takatoshi Tanaka, Mitsuhiro Ohta, Hiroki Katayama, Akitoshi Toyota
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Patent number: 11385457Abstract: 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: GrantFiled: September 9, 2020Date of Patent: July 12, 2022Assignee: CANON KABUSHIKI KAISHAInventors: Yoshihiko Tanaka, Hisanori Kobayashi, Naoki Matsushita, Takatoshi Tanaka, Mitsuhiro Ohta, Hiroki Katayama
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Patent number: 11383413Abstract: 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: GrantFiled: April 15, 2019Date of Patent: July 12, 2022Assignee: CANON KABUSHIKI KAISHAInventors: Fumihiko Yamaya, Hiroki Katayama, Yoshihiko Tanaka, Takatoshi Tanaka, Mitsuhiro Ohta, Atsushi Takata, Naoki Matsushita