Patents by Inventor Daisuke Baba

Daisuke Baba 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: 20210167288
    Abstract: By using a polycyclic aromatic compound as a material for a light-emitting layer, formed by connecting a plurality of aromatic rings with a boron atom and an oxygen, sulfur, or selenium atom, which have been substituted by a specific aryl such as anthracene, an organic EL element having at least one of excellent quantum efficiency and element life can be provided.
    Type: Application
    Filed: June 18, 2018
    Publication date: June 3, 2021
    Applicants: Kwansei Gakuin Educational Foundation, JNC Corporation
    Inventors: Takuji Hatakeyama, Akio TAJIMA, Akihide MIZUTANI, Daisuke BABA, Yuko YAMAGA
  • Patent number: 10983473
    Abstract: A drum cartridge is mountable in and dismountable from an image forming apparatus without including a developing device. The drum cartridge includes an image bearing member, a charging member, and a cleaning member. The cleaning member includes an elastic layer contacting the charging member. The elastic layer includes a foam member and is made of a material having Asker-C hardness of 5-30 degrees.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: April 20, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Daisuke Baba
  • Patent number: 10942470
    Abstract: A developing apparatus, includes: a developer bearing member that encloses a magnet roller having a plurality of magnetic poles and is rotatable; a wall that forms a developer storing chamber for storing a magnetic developer therein; a restricting member configured to restrict a layer thickness of the magnetic developer carried by the developer bearing member; and a moving member configured to move the magnetic developer carried by the developer bearing member before the magnetic developer is restricted by the restricting member, the moving member being brought into contact with a surface of the developer bearing member, the moved developer being on the developer veering member after the moving member moved the developer on the developer bearing member, wherein the moving member is disposed at a position opposed to any of the magnetic pole positions of the plurality of magnetic poles.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: March 9, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hirokazu Fujino, Naoki Fukushima, Atsushi Toda, Daisuke Baba, Yosuke Kishi, Masahito Kato, Masaki Hirose
  • Patent number: 10843496
    Abstract: A medium includes a base layer and a separation layer. First to fifth regions are defined in the medium along a first direction in this order. Portions of the base layer which are in contact with the separation layer are stickable in at least a part of the first region and the fifth region and are not stickable in the second region and the fourth region. A length, in a second direction, of a second-side end portion of the fifth region in the first direction is less than a length, in the second direction, of a first-side end portion of the third region in the first direction. A length, in the second direction, of a first-side end portion of the fifth region in the first direction is less than the length, in the second direction, of the second-side end portion of the fifth region in the first direction.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: November 24, 2020
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Kentaro Murayama, Harumitsu Inoue, Haruki Matsumoto, Kazuyuki Katagiri, Daisuke Baba
  • Patent number: 10761451
    Abstract: A developing apparatus, includes: a developer bearing member that is rotatable; an moving member configured to move the magnetic developer carried on the developer bearing member before the magnetic developer is restricted by a restricting member, the moving member being rotatable and brought into contact with a surface of the developer bearing member; and a control portion, wherein, at a contact position between the developer bearing member and the moving member, assuming that a moving speed vector of a surface of the developer bearing member is taken as R and a moving speed vector of a surface of the moving member is taken as r, the control portion controls rotational operation of the developer bearing member and the moving member such that a direction of a vector R?r during image formation and a direction of a vector R?r during non-image formation be opposite to each other.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: September 1, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masahito Kato, Hirokazu Fujino, Naoki Fukushima, Atsushi Toda, Daisuke Baba, Yosuke Kishi, Masaki Hirose
  • Publication number: 20200221943
    Abstract: A subjective optometry apparatus has a projection optical system including a visual target presenting portion and an optical member to project a target light flux toward a subject eye, and causing the target light flux to be incident on the optical member with a deviation of the incident target light flux from an optical axis of the optical member, a housing accommodating the projection optical system, a presentation window for emitting the target light flux from the inside of the housing to the outside thereof, an eye refractive power measurement unit provided outside the housing, and holding means integrally connecting the housing to the eye refractive power measurement unit to hold the eye refractive power measuring unit. When using the eye refractive power measuring unit, a distance from the presentation window to the eye refractive power measurement unit in an optical path is equal to or less than 180 mm.
    Type: Application
    Filed: June 6, 2018
    Publication date: July 16, 2020
    Applicant: NIDEK CO., LTD.
    Inventors: Toshihiro KOBAYASHI, Yukito HIRAYAMA, Ryoji SUZUKI, Kazunori SHIBATA, Daisuke BABA
  • Publication number: 20200150579
    Abstract: A drum cartridge is mountable in and dismountable from an image forming apparatus without including a developing device. The drum cartridge includes an image bearing member, a charging member, and a cleaning member. The cleaning member includes an elastic layer contacting the charging member. The elastic layer includes a foam member and is made of a material having Asker-C hardness of 5-30 degrees.
    Type: Application
    Filed: November 4, 2019
    Publication date: May 14, 2020
    Inventor: Daisuke Baba
  • Publication number: 20190384206
    Abstract: A developing apparatus, includes: a developer bearing member that is rotatable; an moving member configured to move the magnetic developer carried on the developer bearing member before the magnetic developer is restricted by a restricting member, the moving member being rotatable and brought into contact with a surface of the developer bearing member; and a control portion, wherein, at a contact position between the developer bearing member and the moving member, assuming that a moving speed vector of a surface of the developer bearing member is taken as R and a moving speed vector of a surface of the moving member is taken as r, the control portion controls rotational operation of the developer bearing member and the moving member such that a direction of a vector R?r during image formation and a direction of a vector R?r during non-image formation be opposite to each other.
    Type: Application
    Filed: June 13, 2019
    Publication date: December 19, 2019
    Inventors: Masahito Kato, Hirokazu Fujino, Naoki Fukushima, Atsushi Toda, Daisuke Baba, Yosuke Kishi, Masaki Hirose
  • Publication number: 20190361370
    Abstract: A developing apparatus, includes: a developer bearing member that encloses a magnet roller having a plurality of magnetic poles and is rotatable; a wall that forms a developer storing chamber for storing a magnetic developer therein; a restricting member configured to restrict a layer thickness of the magnetic developer carried by the developer bearing member; and a moving member configured to move the magnetic developer carried by the developer bearing member before the magnetic developer is restricted by the restricting member, the moving member being brought into contact with a surface of the developer bearing member, the moved developer being on the developer veering member after the moving member moved the developer on the developer bearing member, wherein the moving member is disposed at a position opposed to any of the magnetic pole positions of the plurality of magnetic poles.
    Type: Application
    Filed: May 20, 2019
    Publication date: November 28, 2019
    Inventors: Hirokazu Fujino, Naoki Fukushima, Atsushi Toda, Daisuke Baba, Yosuke Kishi, Masahito Kato, Masaki Hirose
  • Patent number: 10481539
    Abstract: Disclosed is an image forming apparatus that is capable of performing a first image forming mode that performs image formation at a first peripheral speed ratio representing a ratio of a peripheral speed of a developer bearing member to a peripheral speed of an image bearing member and a second image forming mode that performs the image formation at a second peripheral speed ratio different from the first peripheral speed ratio, and that detects an amount of a developer consumed in the image formation, based on an estimate of the amount of the developer consumed by one pixel and the number of pixels at a part at which the developer is consumed. The estimate of the amount of the developer consumed by the one pixel in the first image forming mode is different from that in the second image forming mode.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: November 19, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuichiro Hirata, Daisuke Baba
  • Publication number: 20190312207
    Abstract: Provided is an organic electroluminescent element having optimal light emission characteristics. The above problem is solved by an organic electroluminescent element having a light emitting layer containing a compound of formula (1) or a multimer compound having a plurality of structures of formula (1), and a compound of formula (2A) or (2B) in formula (1), ring A, ring B, and ring C each represent an aryl ring or the like, X1 and X2 each represent >O or >N—R, and the R represents an aryl or the like, and in formula (2A) or (2B), X represents an aryl or the like, and Z represents a single bond, a divalent group, or the like.
    Type: Application
    Filed: January 25, 2018
    Publication date: October 10, 2019
    Applicants: Kwansei Gakuin Educational Foundation, JNC Corporation
    Inventors: Takuji HATAKEYAMA, Akio TAJIMA, Daisuke BABA, Yukihiro FUJITA, Yuko YAMAGA, Hiroyuki IMAI
  • Patent number: 10438517
    Abstract: A medium includes a base layer and a separation layer. Regions are defined along a first direction. The regions include: a first region in which a portion of the medium which is in contact with the separation layer includes opposite end portions in a second direction, and at least the opposite end portions are stickable; a second region in which a portion of the medium which is in contact with the separation layer is non-stickable; and a third region in which a portion of the medium which is in contact with the separation layer is stickable. A longest length of the first region in the second direction is less than a length of the second region or the third region in the second direction at a particular position in the first direction.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: October 8, 2019
    Assignee: BROTHER KOGYO KABUSHIKI KAISHA
    Inventors: Kentaro Murayama, Kazuyuki Katagiri, Daisuke Baba, Yukihiko Sato, Shota Iijima, Haruki Matsumoto, Harumitsu Inoue
  • Publication number: 20190256538
    Abstract: By providing a novel polycyclic aromatic compound in which a plurality of aromatic rings is linked via a nitrogen atom, a boron atom, or the like, options of a material for an organic EL element are increased. In addition, by using the novel polycyclic aromatic compound as a material for an organic electroluminescent element, an excellent organic EL element is provided.
    Type: Application
    Filed: August 25, 2017
    Publication date: August 22, 2019
    Applicants: Kwansei Gakuin Educational Foundation, JNC Corporation
    Inventors: Takuji HATAKEYAMA, Kohei MATSUI, Yusuke WATANABE, Daisuke BABA, Yasuyuki SASADA, Motoki YANAI, Toshiaki IKUTA
  • Patent number: 10365587
    Abstract: A developing apparatus includes: a developing roller; a frame configured to support the developing roller at each of two end portions of the developing roller in a longitudinal direction of the developing roller; and a sealing member configured to seal a space between the frame and each of the two end portions of the developing roller. A first lubricant having an average particle size smaller than a predetermined surface roughness Ra is applied to a first region that is located at each end portion of the developing roller in the longitudinal direction and is in contact with the sealing member. A second lubricant having an average particle size larger than the surface roughness Ra is applied to a second region that is located on an inner side of the first region in the longitudinal direction and is separated from the sealing member and has the surface roughness Ra.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: July 30, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Go Shindo, Daisuke Baba
  • Publication number: 20190229277
    Abstract: By manufacturing an organic EL element using a material for a light emitting layer including a pyrene-based compound represented by the following formula (2) as a host material and a polycyclic aromatic compound in which a plurality of aromatic rings is linked with a boron atom and a nitrogen atom or an oxygen atom as a dopant material, an organic EL element having, for example, excellent light emission efficiency is provided. In the above formula (2), at least one hydrogen atom in a pyrene moiety may be substituted by an aryl having 6 to 10 carbon atoms or the like. Ar represents an aryl having 14 to 40 carbon atoms or a heteroaryl having 12 to 40 carbon atoms. These groups may be substituted by an aryl having 6 to 10 carbon atoms or the like. s and p each independently represent an integer of 1 or 2. s and p do not simultaneously represent 2. One or more hydrogen atoms in a compound represented by formula (2) may be each independently substituted by a halogen atom, cyano, or a deuterium atom.
    Type: Application
    Filed: January 10, 2019
    Publication date: July 25, 2019
    Applicants: Kwansei Gakuin Educational Foundation, JNC Corporation
    Inventors: Takuji Hatakeyama, Yuko Yamaga, Daisuke Baba, Kazushi Shiren
  • Publication number: 20190137923
    Abstract: Disclosed is an image forming apparatus that is capable of performing a first image forming mode that performs image formation at a first peripheral speed ratio representing a ratio of a peripheral speed of a developer bearing member to a peripheral speed of an image bearing member and a second image forming mode that performs the image formation at a second peripheral speed ratio different from the first peripheral speed ratio, and that detects an amount of a developer consumed in the image formation, based on an estimate of the amount of the developer consumed by one pixel and the number of pixels at a part at which the developer is consumed. The estimate of the amount of the developer consumed by the one pixel in the first image forming mode is different from that in the second image forming mode.
    Type: Application
    Filed: January 4, 2019
    Publication date: May 9, 2019
    Inventors: Yuichiro Hirata, Daisuke Baba
  • Patent number: 10274885
    Abstract: An image forming apparatus includes an image bearing member, a developer bearing member, an updating device to update toner consumption based on a number of dots corresponding to laser irradiation by which toner is consumed, and an alerting device to alert an alarm concerning a residual amount of the toner based on toner consumption updated by the updating device. Image formation is performed in a first mode at a first peripheral speed ratio representing a ratio of a peripheral speed of the developer bearing member to a peripheral speed of the image bearing member, and in a second mode at a second peripheral speed ratio, which is greater than the first peripheral speed ratio. The alerting device alerts the alarm based on a total number of dots, which is smaller as an operation frequency of the second mode and becomes higher in an operation frequency of the first mode.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: April 30, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuichiro Hirata, Daisuke Baba
  • Publication number: 20190101850
    Abstract: A developing apparatus includes: a developing roller; a frame configured to support the developing roller at each of two end portions of the developing roller in a longitudinal direction of the developing roller; and a sealing member configured to seal a space between the frame and each of the two end portions of the developing roller. A first lubricant having an average particle size smaller than a predetermined surface roughness Ra is applied to a first region that is located at each end portion of the developing roller in the longitudinal direction and is in contact with the sealing member. A second lubricant having an average particle size larger than the surface roughness Ra is applied to a second region that is located on an inner side of the first region in the longitudinal direction and is separated from the sealing member and has the surface roughness Ra.
    Type: Application
    Filed: September 26, 2018
    Publication date: April 4, 2019
    Inventors: Go Shindo, Daisuke Baba
  • Publication number: 20190030941
    Abstract: A medium includes a base layer and a separation layer. First to fifth regions are defined in the medium along a first direction in this order. Portions of the base layer which are in contact with the separation layer are stickable in at least a part of the first region and the fifth region and are not stickable in the second region and the fourth region. A length, in a second direction, of a second-side end portion of the fifth region in the first direction is less than a length, in the second direction, of a first-side end portion of the third region in the first direction. A length, in the second direction, of a first-side end portion of the fifth region in the first direction is less than the length, in the second direction, of the second-side end portion of the fifth region in the first direction.
    Type: Application
    Filed: July 27, 2018
    Publication date: January 31, 2019
    Inventors: Kentaro MURAYAMA, Harumitsu INOUE, Haruki MATSUMOTO, Kazuyuki KATAGIRI, Daisuke BABA
  • Publication number: 20180292778
    Abstract: An image forming apparatus includes an image bearing member, a developer bearing member, an updating device to update toner consumption based on a number of dots corresponding to laser irradiation by which toner is consumed, and an alerting device to alert an alarm concerning a residual amount of the toner based on toner consumption updated by the updating device. Image formation is performed in a first mode at a first peripheral speed ratio representing a ratio of a peripheral speed of the developer bearing member to a peripheral speed of the image bearing member, and in a second mode at a second peripheral speed ratio, which is greater than the first peripheral speed ratio. The alerting device alerts the alarm based on a total number of dots, which is smaller as an operation frequency of the second mode and becomes higher in an operation frequency of the first mode.
    Type: Application
    Filed: June 15, 2018
    Publication date: October 11, 2018
    Inventors: Yuichiro Hirata, Daisuke Baba