Patents by Inventor Daisuke Aruga

Daisuke Aruga 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: 11385503
    Abstract: There is provided a liquid crystal display apparatus having sufficiently small black brightness in an oblique direction. A liquid crystal display apparatus according to an embodiment of the present invention includes: a liquid crystal cell including a viewer-side substrate, a back surface-side substrate, and a homogeneously aligned liquid crystal layer sandwiched therebetween; a first polarizer arranged on a viewer side of the liquid crystal cell; a second polarizer arranged on a back surface side of the liquid crystal cell; a first optical compensation layer arranged between the liquid crystal cell and the first polarizer; and a second optical compensation layer arranged between the liquid crystal cell and the second polarizer. The viewer-side substrate and the back surface-side substrate each have a thickness direction retardation Rth(550) of from ?10 nm to 100 nm, and a product A×E is 300 or less.
    Type: Grant
    Filed: August 19, 2020
    Date of Patent: July 12, 2022
    Assignee: NITTO DENKO CORPORATION
    Inventors: Daisuke Hayashi, Sohei Aruga, Toshiyuki Iida
  • Patent number: 11366405
    Abstract: A holding member includes a first opposing portion (first inner wall surface) and a second opposing portion (second inner wall surface) which oppose side wall surfaces of a lens array. Side wall surfaces of the lens array on opposite end sides with respect to a longitudinal direction of the lens array are exposed from opposite ends of the first opposing portion and opposite ends of the second opposing portion.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: June 21, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuaki Otoguro, Yuta Okada, Daisuke Aruga, Hitoshi Iwai, Shinichiro Hosoi, Yuichiro Imai, Toshiki Momoka, Yoshitaka Otsubo, Saimon Gokyu, Takehiro Ishidate
  • Publication number: 20220050399
    Abstract: A holding member 505 includes a first side wall portion 505a and a second side wall portion 505b, and a part of a surface 803b of a substrate 502 on a side opposite from a mounting surface 803 and a holding member 505 are fixed to each other by an adhesive. In the first side wall portion 505a, an inserting hole 801 opposing a corner portion 502 as of the substrate 502 in a widthwise direction of the substrate 502, and also, in the second side wall portion 505b, an inserting hole 801 opposing a corner portion 502bs of the substrate 502.
    Type: Application
    Filed: October 29, 2021
    Publication date: February 17, 2022
    Inventors: Toshiki Momoka, Hitoshi Iwai, Shinichiro Hosoi, Takehiro Ishidate, Daisuke Aruga, Ryota Fukumoto
  • Patent number: 11249434
    Abstract: In an image forming apparatus including an optical print head, a length of a cable from a regulating portion to a connecting portion in a state where the connecting portion is connected to a connector is set to a length that enables the connector to be located on a front side of an opening when the optical print head moves to a pull-out position in the state where the connecting portion is connected to the connector.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: February 15, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuya Tamura, Hitoshi Iwai, Takehiro Ishidate, Shinichiro Hosoi, Toshiki Momoka, Daisuke Aruga
  • Patent number: 11086271
    Abstract: The image forming apparatus stores a plurality of candidate formulas in a memory. Each of the candidate formulas is a formula for calculating a prediction formula for calculating a predicted value of the color misregistration amount based on an external exposure device temperature, which is a temperature of the atmosphere around the exposure device, an external machine temperature, and a heater temperature of a heater which heats the plurality of image forming units. The CPU determines the prediction formula from the plurality of candidate formulas according to the external exposure device temperature, the external machine temperature, and the heater temperature. The CPU calculates the predicted value of the color misregistration amount using the determined predicted formula, and performs a color misregistration correction according to the calculated predicted value.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: August 10, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuichiro Imai, Daisuke Aruga, Yoshitaka Otsubo
  • Patent number: 11079698
    Abstract: An image forming apparatus includes a print head to expose a drum to light, a first supporting unit supporting the print head and to move to mounting and extraction positions, a cable to supply a print head driving signal, an abutting portion, and a second supporting unit having a holding unit to hold the cable and to support the first supporting member. When the print head moves to the mounting position from the extraction position in a state where the cable is connected to the print head, the abutting portion abuts on the cable in one area between a holding unit held portion and a print head connected portion and moves the one area in a direction in which the first supporting unit moves to the mounting position to form in the one area a curved area that is warped and curved toward the mounting position from the extraction position.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: August 3, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takehiro Ishidate, Daisuke Aruga, Toshiki Momoka
  • Patent number: 11067915
    Abstract: A cleaning member that is used in an image forming apparatus and that is inserted from outside the image forming apparatus, the apparatus including a holding body that holds a substrate on which light emitting elements that expose a photosensitive drum are aligned and that holds lenses, the cleaning member including a rod-shaped rhabdoid formed of resin, a cleaning portion provided in the rhabdoid to clean a light emission surface of each lens, the cleaning portion moving together with the rhabdoid inserted in the image forming apparatus and opposing the light emission surface in an optical axis direction of the lens, and a magnet provided on the rhabdoid, the magnet emitting magnetic force that generates force drawing the holding body thereto so that the cleaning portion continues to contact the light emission surface.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: July 20, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Daisuke Aruga, Hitoshi Iwai, Shinichiro Hosoi, Toshiki Momoka, Takehiro Ishidate, Ryota Fukumoto
  • Patent number: 11042103
    Abstract: An image forming apparatus includes a photosensitive drum to rotate as to an apparatus main body, a print head having a connector and a light emitting element, a movement mechanism to move the print head between an exposing position and a retracted position, a support part rotatable and to support the movement mechanism, a cable, and an abutting portion. The cable supplies drive signals for driving the light emitting element to the print head. The cable extends toward an opposite side of the connector and is bent toward one direction or another direction of the support part. The abutting portion is provided to the support part, and abuts the cable bent portion in a direction from the retracted position toward the exposing position to cause the cable to flex between a connected portion to the connector and the bent portion, when the print head is at the retracted position.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: June 22, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Daisuke Aruga, Toshiki Momoka, Takehiro Ishidate
  • Patent number: 10928746
    Abstract: An image forming apparatus includes a drum unit, an optical print head, a moving mechanism, a moving mechanism supporting member, a main assembly, a flexible flat cable, a first cover portion made of a resin material and provided in the supporting member so as to cover a first portion of a cutting plane of the opening, the first portion opposing one surface of the flexible flat cable, and a second cover portion made of a resin material and provided in the supporting member so as to cover a second portion of the cutting plane of the opening, the second portion opposing the other surface of the flexible flat cable.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: February 23, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Daisuke Aruga, Hitoshi Iwai, Shinichiro Hosoi, Toshiki Momoka, Takehiro Ishidate, Yuya Tamura, Shinichiro Kaikawa
  • Patent number: 10895818
    Abstract: An image forming apparatus includes a third link portion which is rotatably connected to said first link portion at a position between said first connecting portion and said first moving portion so that said first moving portion and said second moving portion are moved toward said drum unit by rotation of said first link portion about said first connecting portion as a rotation shaft and by rotation of said second link portion about said second connecting portion as a rotation shaft in interrelation with slide of said slidable portion, and which is rotatable relative to the apparatus main assembly. The third link portion is out of contact with the optical print head at a portion corresponding to an end portion on the optical print head side.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: January 19, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshitaka Otsubo, Yasuaki Otoguro, Yuta Okada, Daisuke Aruga, Hitoshi Iwai, Shinichiro Hosoi, Yuichiro Imai, Toshiki Momoka, Saimon Gokyu, Takehiro Ishidate
  • Patent number: 10884372
    Abstract: An image forming apparatus includes a cover pivotable on a body to close an opening at a closed position and open the opening at an open position, first and second replacement units having photosensitive drums, an optical print head pivotable in one direction, a spring, and a stopper. The spring applies, to the optical print head, a force for allowing the optical print head to pivot toward the one direction so that a movement of the optical print head with a pivotal movement of the cover from the open position to the closed position is prevented from being inhibited by the first developing cartridge. The optical print head, having the force applied the optical print head by the spring, so that movement of the optical print head with pivotal movement of the cover from the open to the closed position is prevented from being inhibited by the second developing cartridge.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: January 5, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuya Tamura, Takehiro Ishidate, Hitoshi Iwai, Yuta Okada, Toshiki Momoka, Shinichiro Hosoi, Daisuke Aruga, Shinichiro Kaikawa
  • Patent number: 10845751
    Abstract: An image forming apparatus includes a drum cartridge including a photosensitive drum, a movable optical print head including a light emitting element and a lens array, and a portion-to-be-contacted. The photosensitive drum and a light emergent surface of the lens array are spaced from each other to permit insertion of a cleaning member therebetween from an outside of the main assembly. The portion-to-be-contacted provided in a main assembly and configured to be contacted by the cleaning member to prevent further insertion of said cleaning member after said cleaning member cleans said light emergent surface by sliding on the light emergent surface from one end side toward the other end side of the light emergent surface with respect to a longitudinal direction of said lens array.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: November 24, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinichiro Hosoi, Hitoshi Iwai, Yuya Tamura, Takehiro Ishidate, Toshiki Momoka, Daisuke Aruga
  • Patent number: 10824108
    Abstract: A cleaning member for use in an image forming apparatus and configured to be inserted into the apparatus, the apparatus comprising a holding body that holds a substrate and lenses, the cleaning member comprising a rod, a cleaning portion provided in the rod to clean a light emission surface of each lens, a magnet attached to the rod, the magnet emitting a magnetic field to generates a magnetic force to draw the holding body thereto so that the cleaning portion maintains contact with the light emission surface, a yoke member attached to the rod and in contact with the magnet. The yoke member is configured to protrude, with respect to the magnet, towards a side on which the holding body is disposed, and a contact portion that is configured to contact the holding body and that to protrude, with respect to the yoke member, towards the above side.
    Type: Grant
    Filed: March 5, 2020
    Date of Patent: November 3, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hitoshi Iwai, Shinichiro Hosoi, Takehiro Ishidate, Toshiki Momoka, Daisuke Aruga, Ryota Fukumoto
  • Publication number: 20200333724
    Abstract: An image forming apparatus includes a print head to expose a drum to light, a first supporting unit supporting the print head and to move to mounting and extraction positions, a cable to supply a print head driving signal, an abutting portion, and a second supporting unit having a holding unit to hold the cable and to support the first supporting member. When the print head moves to the mounting position from the extraction position in a state where the cable is connected to the print head, the abutting portion abuts on the cable in one area between a holding unit held portion and a print head connected portion and moves the one area in a direction in which the first supporting unit moves to the mounting position to form in the one area a curved area that is warped and curved toward the mounting position from the extraction position.
    Type: Application
    Filed: June 24, 2020
    Publication date: October 22, 2020
    Inventors: Takehiro Ishidate, Daisuke Aruga, Toshiki Momoka
  • Publication number: 20200292984
    Abstract: A cleaning member for use in an image forming apparatus and configured to be inserted into the apparatus, the apparatus comprising a holding body that holds a substrate and lenses, the cleaning member comprising a rod, a cleaning portion provided in the rod to clean a light emission surface of each lens, a magnet attached to the rod, the magnet emitting a magnetic field to generates a magnetic force to draw the holding body thereto so that the cleaning portion maintains contact with the light emission surface, a yoke member attached to the rod and in contact with the magnet. The yoke member is configured to protrude, with respect to the magnet, towards a side on which the holding body is disposed, and a contact portion that is configured to contact the holding body and that to protrude, with respect to the yoke member, towards the above side.
    Type: Application
    Filed: March 5, 2020
    Publication date: September 17, 2020
    Inventors: Hitoshi Iwai, Shinichiro Hosoi, Takehiro Ishidate, Toshiki Momoka, Daisuke Aruga, Ryota Fukumoto
  • Publication number: 20200292985
    Abstract: A cleaning member that is used in an image forming apparatus and that is inserted from outside the image forming apparatus, the apparatus including a holding body that holds a substrate on which light emitting elements that expose a photosensitive drum are aligned and that holds lenses, the cleaning member including a rod-shaped rhabdoid formed of resin, a cleaning portion provided in the rhabdoid to clean a light emission surface of each lens, the cleaning portion moving together with the rhabdoid inserted in the image forming apparatus and opposing the light emission surface in an optical axis direction of the lens, and a magnet provided on the rhabdoid, the magnet emitting magnetic force that generates force drawing the holding body thereto so that the cleaning portion continues to contact the light emission surface.
    Type: Application
    Filed: March 5, 2020
    Publication date: September 17, 2020
    Inventors: Daisuke Aruga, Hitoshi Iwai, Shinichiro Hosoi, Toshiki Momoka, Takehiro Ishidate, Ryota Fukumoto
  • Patent number: 10747137
    Abstract: An image forming apparatus includes a print head to expose a drum to light, a first supporting unit supporting the print head and to move to mounting and extraction positions, a cable to supply a print head driving signal, an abutting portion, and a second supporting unit having a holding unit to hold the cable and to support the first supporting member. When the print head moves to the mounting position from the extraction position in a state where the cable is connected to the print head, the abutting portion abuts on the cable in one area between a holding unit held portion and a print head connected portion and moves the one area in a direction in which the first supporting unit moves to the mounting position to form in the one area a curved area that is warped and curved toward the mounting position from the extraction position.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: August 18, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takehiro Ishidate, Daisuke Aruga, Toshiki Momoka
  • Patent number: 10739693
    Abstract: Provided are a first seating face and a second seating face, to which a lower side of a holding member of an optical print head being moved from an exposure position toward a retracted position by a movement mechanism strikes in the direction of movement thereof. A light emission face of a lens array of the holding member that has abutted the first seating face and second seating face is thereby positioned on a movement path of a rubbing portion provided on a cleaning member that is inserted from an opening.
    Type: Grant
    Filed: June 6, 2018
    Date of Patent: August 11, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Daisuke Aruga, Yasuaki Otoguro, Yuta Okada, Hitoshi Iwai, Shinichiro Hosoi, Yuichiro Imai, Toshiki Momoka, Yoshitaka Otsubo, Saimon Gokyu, Takehiro Ishidate
  • Patent number: 10725289
    Abstract: A casing of an optical scanning apparatus includes: a mounting portion to which a sound-insulating member is mountable; a first and a second support portions supporting a reflective mirror in the casing on which the sound-insulating member is mounted and brought into contact with a back surface of the reflective mirror; and a third and a fourth support portions supporting a reflective mirror in the casing on which the sound-insulating member is not mounted and brought into contact with a back surface of the reflective mirror, wherein the first and the second support portions are positioned between the third and the fourth support portions in a longitudinal direction of the reflective mirror, and contact portions of the third and the fourth support portions protrude toward a reflective surface side of the reflective mirror to be arranged with respect to contact portions of the first and the second support portions.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: July 28, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Nakahata, Yasuaki Otoguro, Takehiro Ishidate, Yuta Okada, Daisuke Aruga
  • Publication number: 20200192236
    Abstract: A holding member includes a first opposing portion (first inner wall surface) and a second opposing portion (second inner wall surface) which oppose side wall surfaces of a lens array. Side wall surfaces of the lens array on opposite end sides with respect to a longitudinal direction of the lens array are exposed from opposite ends of the first opposing portion and opposite ends of the second opposing portion.
    Type: Application
    Filed: December 13, 2019
    Publication date: June 18, 2020
    Inventors: Yasuaki Otoguro, Yuta Okada, Daisuke Aruga, Hitoshi Iwai, Shinichiro Hosoi, Yuichiro Imai, Toshiki Momoka, Yoshitaka Otsubo, Saimon Gokyu, Takehiro Ishidate