Patents by Inventor Akihiko Itami

Akihiko Itami 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: 11972509
    Abstract: Method for acquiring local gonio-reflection characteristics of an image which is aggregation of dots. Sensory glossiness (L) of the image determined by equation (1) is 1.0 or more. The sensory glossiness (L) is determined based on a height of a peak (H), a height of a base (B) and a half width of a peak (W) of a distribution information of lightness with respect to light receiving angle, obtained by measuring reflected light of a measuring light irradiated into the image. The local gonio-reflection characteristics is acquired with a spatial resolution (A) for acquiring the local gonio-reflection characteristics and a resolution (B) which represents a distribution information of the dots within a region where the sensory glossiness (L) being 1.0 or more, satisfying formula (2). L=Log((H?B)/W)??Equation (1) 0.
    Type: Grant
    Filed: July 9, 2021
    Date of Patent: April 30, 2024
    Assignee: KONICA MINOLTA, INC.
    Inventors: Takayuki Ishikawa, Akihiko Itami
  • Patent number: 11886145
    Abstract: Provided is an electrostatic charge image developing toner including toner matrix particles containing at least a binder resin, wherein a photosensitizer having a singlet oxygen generating ability is contained inside the toner matrix particles or in an external additive attached to the toner matrix particles.
    Type: Grant
    Filed: June 21, 2022
    Date of Patent: January 30, 2024
    Assignee: KONICA MINOLTA, INC.
    Inventor: Akihiko Itami
  • Publication number: 20230039387
    Abstract: Provided is an electrostatic charge image developing toner including toner matrix particles containing at least a binder resin, wherein a photosensitizer having a singlet oxygen generating ability is contained inside the toner matrix particles or in an external additive attached to the toner matrix particles.
    Type: Application
    Filed: June 21, 2022
    Publication date: February 9, 2023
    Inventor: Akihiko ITAMI
  • Publication number: 20220066337
    Abstract: An image forming method uses an electrophotographic photoreceptor and a toner for developing an electrostatic charge image. The image forming method has a charging step, an exposure step, a developing step, a transfer step and a cleaning step, wherein the charging step uses a contact charging device; the photoreceptor has a universal hardness value (HU) of 170 N/mm2 or more, and an elastic deformation ratio of 40% or more when a Vickers indenter is used in a predetermined environment and pushed by a maximum load of 2 mN. The toner for developing an electrostatic charge image contains toner base particles of a core-shell structure having a shell layer of 10% by mass or less with respect to a mass of a toner base particle on an outside of a resin constituting a core particle, and a solubility parameter value (SPs) of a resin constituting the shell layer is 10.75 or less.
    Type: Application
    Filed: August 5, 2021
    Publication date: March 3, 2022
    Inventors: Akihiko ITAMI, Seijiro TAKAHASHI, Seisuke MAEDA
  • Publication number: 20220036601
    Abstract: Method for acquiring local gonio-reflection characteristics of an image which is aggregation of dots. Sensory glossiness (L) of the image determined by equation (1) is 1.0 or more. The sensory glossiness (L) is determined based on a height of a peak (H), a height of a base (B) and a half width of a peak (W) of a distribution information of lightness with respect to light receiving angle, obtained by measuring reflected light of a measuring light irradiated into the image. The local gonio-reflection characteristics is acquired with a spatial resolution (A) for acquiring the local gonio-reflection characteristics and a resolution (B) which represents a distribution information of the dots within a region where the sensory glossiness (L) being 1.0 or more, satisfying formula (2). L=Log((H?B)/W)??Equation (1) 0.
    Type: Application
    Filed: July 9, 2021
    Publication date: February 3, 2022
    Inventors: Takayuki ISHIKAWA, Akihiko ITAMI
  • Patent number: 8668846
    Abstract: A dye-sensitized photoelectric conversion element, comprises a pair of electrodes arranged opposite to each other; a semiconductor layer including a semiconductor supporting a sensitizing dye; and an electrolyte layer. At least the semiconductor layer and the electrolyte layer are provided between the pair of electrodes, and the sensitizing dye contains a compound represented by the following Formula (1).
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: March 11, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hidekazu Kawasaki, Akihiko Itami, Kazuya Isobe, Hideya Miwa, Kazukuni Nishimura, Mayuko Ushiro
  • Patent number: 8471143
    Abstract: Provided is a photoelectric conversion element containing a pair of opposite electrodes having therebetween: a semiconductor layer containing a sensitizing dye which is supported by a semiconductor; and a charge transport layer, wherein the sensitizing dye is a compound represented by Formula (1),
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: June 25, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hidekazu Kawasaki, Akihiko Itami, Kazuya Isobe, Hideya Miwa, Kazukuni Nishimura, Mayuko Ushiro
  • Patent number: 8410356
    Abstract: Provided is a photoelectric conversion element for which a novel compound (dye) exhibiting excellent adsorption to an oxide semiconductor and exhibiting high photoelectric conversion efficiency is used, and also provided is a solar cell employing the photoelectric conversion element. Disclosed is a dye-sensitizing type photoelectric conversion element possessing at least a pair of facing electrodes, a semiconductor layer possessing a semiconductor and a sensitizing dye supported on the semiconductor, and a charge transport layer, wherein the semiconductor layer and the charge transport layer are provided between the facing electrodes, and wherein the sensitizing dye comprises a compound represented by the following Formula (1).
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: April 2, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hidekazu Kawasaki, Akihiko Itami, Kazuya Isobe, Hideya Miwa, Kazukuni Nishimura, Mayuko Ushiro
  • Publication number: 20130061929
    Abstract: A photoelectric conversion element, includes a substrate, a first electrode, a photoelectric conversion layer including semiconductors and sensitizing dyes, a positive bole transport layer including a solid positive hole transport substance, and a second electrode, wherein the solid positive hole transport substance contains a conductive polymer with a structure represented by the following Formula (1), and wherein the sensitizing dyes includes a compound with a structure represented by the following Formula (2) and at least one of compounds with respective structures represented by the following Formulas (4) to (9).
    Type: Application
    Filed: September 5, 2012
    Publication date: March 14, 2013
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventor: Akihiko ITAMI
  • Patent number: 8395041
    Abstract: Disclosed is a photoelectric conversion element comprising a conductive support and provided thereon, a semiconductor layer, a charge transporting layer and an opposed electrode, the semiconductor layer comprising a semiconductor with a dye, wherein the dye is a compound represented by the following formula (1).
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: March 12, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hidekazu Kawasaki, Akihiko Itami, Kazuya Isobe, Hideya Miwa, Kazukuni Nishimura, Mayuko Ushiro
  • Patent number: 8247687
    Abstract: Provided are a newly developed dye-sensitizing type photoelectric conversion element employing a highly durable sensitizing dye, exhibiting high photoelectric conversion efficiency, and a solar cell fitted with the photoelectric conversion element. Also disclosed is a photoelectric conversion element comprising a compound represented by Formula (1) between a pair of facing electrodes.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: August 21, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hideya Miwa, Akihiko Itami, Kazuya Isobe, Kazukuni Nishimura, Hidekazu Kawasaki, Mayuko Ushiro
  • Patent number: 8241824
    Abstract: An electrophotographic photoreceptor comprising an electrically conductive support having thereon a photo sensitive layer having a laminated structure comprising a charge generation layer and a charge transport layer, wherein the charge generation layer comprises a titanyl phthalocyanine pigment having a crystal structure exhibiting the following peaks of Bragg angles 2? (±0.2°) of X-ray powder diffraction employing a characteristic X-ray of a CuK? radiation (having a wavelength of 1.542 ?): at least a largest diffraction peak at 27.2°, major diffraction peaks at 9.4°, 9.6° and 24.0°, and a diffraction peak of a lowest angle at 7.3° while exhibiting no peak between the peaks of 7.3° and 9.4° and no peak at 26.
    Type: Grant
    Filed: June 17, 2010
    Date of Patent: August 14, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Akihiko Itami
  • Patent number: 8242355
    Abstract: A photoelectric conversion element having a pair of electrodes, and a semiconductor layer comprising a semiconductor carrying a dye and an electrolyte layer is disclosed.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: August 14, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kazukuni Nishimura, Akihiko Itami, Fumitaka Mochizuki, Hideya Miwa, Hidekazu Kawasaki
  • Patent number: 8039741
    Abstract: A photoelectric conversion element comprising a pair of electrodes containing therebetween a compound represented by Formula (1) or Formula (2):
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: October 18, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Akihiko Itami, Fumitaka Mochizuki, Kazukuni Nishimura
  • Patent number: 8029955
    Abstract: Provide is an electrophotographic photoreceptor exhibiting excellent evenness of halftone images together with fine line reproduction, and an image forming method thereof, as to a photoreceptor in which an oxytitanium phthalocyanine pigment having a maximum diffraction peak at a Bragg angle (2?±0.2°) of 27.2° in CuK? X-ray diffraction. Also disclosed is an electrophotographic photoreceptor possessing a body having cylindrical conductive support provided thereon photosensitive layer containing oxytitanium phthalocyanine pigment having maximum diffraction peak at a Bragg angle (2?±0.2°) of 27.2° in CuK? X-ray diffraction, and flanges jointed at both ends of the body, wherein at least one of flanges is fitted with driving shaft having drive hole having at least 3 sides, and a ratio B/A of cross-sectional area B of engaging part of rotation shaft to rotate the electrophotographic photoreceptor with respect to cross-sectional area A of the drive hole is 0.890-0.998.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: October 4, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Eiichi Sakai, Yoshihiko Eto, Kimiyuki Itou, Akihiko Itami, Takeo Oshiba
  • Patent number: 7947898
    Abstract: A photoelectric conversion element is disclosed, comprising a compound represented by the following formula between a pair of opposed electrodes: wherein Ar1, AR2 and Ar3 are each a substituted or unsubstituted aryl or a substituted or unsubstituted heterocyclic group, x is an organic residue having an acidic group and n is an integer of 2 to 8. A solar cell comprising the photoelectric conversion element is also disclosed.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: May 24, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Akihiko Itami, Tomoko Sakimura, Fumitaka Mochizuki, Hideya Miwa
  • Patent number: 7943848
    Abstract: A photoelectric conversion element comprising an electrically conductive support having thereon an oxide semiconductor electrode comprising an oxide semiconductor which is adsorbed with a dye, and a counter electrode facing the oxide semiconductor electrode through a charge transfer layer, wherein the dye is represented by Formula (1):
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: May 17, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kazukuni Nishimura, Akihiko Itami, Fumitaka Mochizuki
  • Patent number: 7897312
    Abstract: A photoreceptor for electrophotography is disclosed. Thickness of the under coat layer is 6-15 ?m, thickness of the charge transport layer is 5-15 ?m, and coefficient of working function of the under coat layer ? is not more than 0.8.
    Type: Grant
    Filed: September 14, 2004
    Date of Patent: March 1, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Akihiko Itami
  • Publication number: 20100330480
    Abstract: An electrophotographic photoreceptor comprising an electrically conductive support having thereon a photo sensitive layer having a laminated structure comprising a charge generation layer and a charge transport layer, wherein the charge generation layer comprises a titanyl phthalocyanine pigment having a crystal structure exhibiting the following peaks of Bragg angles 2? (±0.2°) of X-ray powder diffraction employing a characteristic X-ray of a CuK? radiation (having a wavelength of 1.542 ?): at least a largest diffraction peak at 27.2°, major diffraction peaks at 9.4°, 9.6° and 24.0°, and a diffraction peak of a lowest angle at 7.3° while exhibiting no peak between the peaks of 7.3° and 9.4° and no peak at 26.
    Type: Application
    Filed: June 17, 2010
    Publication date: December 30, 2010
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventor: Akihiko ITAMI
  • Patent number: 7851118
    Abstract: An image forming method, comprising: forming an electrostatic latent image on a rotatable organic photoreceptor; forming a developing brush with a developing agent containing a toner on a rotatable developing sleeve; and bringing the developing brush in contact with the photoreceptor at a developing region so as to visualize the electrostatic latent image into a toner image. The photoreceptor comprises a conductive support member, an intermediate layer containing a binder resin and inorganic particles which have a number average primary order particle size of 3 to 200 nm, and a photosensitive layer provided on the intermediate layer, and the rotating direction of the developing sleeve is counter to that of the photoreceptor at the developing region.
    Type: Grant
    Filed: September 17, 2005
    Date of Patent: December 14, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Akihiko Itami, Masao Asano, Hiroshi Yamazaki, Kunio Shigeta