Patents by Inventor Koji Iijima

Koji Iijima 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: 11203655
    Abstract: An object of the present invention is to provide a polymer compound which can form a phase difference layer having high alignment and suppressed surface unevenness by being blended into a liquid crystal composition, and a liquid crystal composition, a phase difference layer, an optical film, a polarizing plate, and an image display device using the same. The polymer compound of the present invention includes a repeating unit represented by Formula (I), a repeating unit represented by Formula (II), and a repeating unit represented by Formula (III), in which an acid value is 115 mgKOH/g or more, and a hydroxyl value is 70 mgKOH/g or more.
    Type: Grant
    Filed: April 8, 2020
    Date of Patent: December 21, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Yuki Fukushima, Shunya Katoh, Koji Iijima, Shuhei Okuda
  • Publication number: 20210207028
    Abstract: An object of the present invention is to provide a polymer compound in which, by blending with a liquid crystal composition containing a liquid crystalline compound, alignment of the liquid crystalline compound in a phase difference layer to be obtained increases; and a liquid crystal composition, a phase difference layer, an optical film, a polarizing plate, and an image display device using the same. The polymer compound of the present invention is a polymer compound including a repeating unit represented by Formula (I), a repeating unit represented by Formula (II), a repeating unit represented by Formula (III), and a repeating unit represented by Formula (IV).
    Type: Application
    Filed: March 22, 2021
    Publication date: July 8, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Shunya KATOH, Yuki FUKUSHIMA, Shuhei OKUDA, Koji IIJIMA, Masato NAKAO
  • Patent number: 10961458
    Abstract: A liquid crystal composition is provided which has excellent alignment properties, improves a surface state of an optically anisotropic layer to be formed, and improves adhesiveness with a polarizer, an optical film using the same, a polarizing plate, and an image display device. The liquid crystal composition according to the present invention is a liquid crystal composition containing a copolymer having a repeating unit represented by Formula (I) and a repeating unit represented by Formula (II), and a liquid crystal compound.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: March 30, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Masaaki Suzuki, Shunya Katoh, Koji Iijima, Yuki Nakamura
  • Patent number: 10935710
    Abstract: The present invention relates to an optical film which ensures adhesiveness between a polymer film and a liquid crystal layer without deteriorating the alignment of a liquid crystal compound; a polarizing plate using the same; an image display device; a method for producing an optical film; and a method for producing a polarizing plate. The optical film includes a polymer film including a cycloolefin-based polymer, and a liquid crystal layer that is provided adjacent to the polymer film, in which the liquid crystal layer is formed by using a liquid crystal composition containing a liquid crystal compound and a compound having a specific structure, where the liquid crystal composition contains the compound having a specific structure at a content of 0.5% to 7.0% by mass with respect to a mass of the liquid crystal compound, and a predetermined eccentricity value is 20% to 80%.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: March 2, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Koji Iijima, Tatsuya Iwasaki, Katsufumi Ohmuro, Masaaki Suzuki
  • Patent number: 10908338
    Abstract: The present invention provides an optical film exhibiting high alignment and good phase difference development in an oblique direction, and a polarizing plate and an image display device using the same. This optical film of the present invention has a substrate; and a phase difference layer which is provided on the substrate to be adjacent to the substrate, in which the phase difference layer is a layer formed by fixing vertical alignment of a liquid crystal compound having a polymerizable group included in a liquid crystal composition containing the liquid crystal compound and a polymer compound, a difference in ?a value between the polymer compound and the substrate, which is calculated using three-dimensional SP values, is 3 or less, and a content of the polymer compound is less than 10 parts by mass with respect to 100 parts by mass of the liquid crystal compound.
    Type: Grant
    Filed: February 4, 2019
    Date of Patent: February 2, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Shunya Katoh, Koji Iijima, Mitsuyoshi Ichihashi, Masaru Yoshikawa
  • Publication number: 20200231727
    Abstract: An object of the present invention is to provide a polymer compound which can form a phase difference layer having high alignment and suppressed surface unevenness by being blended into a liquid crystal composition, and a liquid crystal composition, a phase difference layer, an optical film, a polarizing plate, and an image display device using the same. The polymer compound of the present invention includes a repeating unit represented by Formula (I), a repeating unit represented by Formula (II), and a repeating unit represented by Formula (III), in which an acid value is 115 mgKOH/g or more, and a hydroxyl value is 70 mgKOH/g or more.
    Type: Application
    Filed: April 8, 2020
    Publication date: July 23, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Yuki Fukushima, Shunya Katoh, Koji Iijima, Shuhei Okuda
  • Publication number: 20190218460
    Abstract: An object of the present invention is a liquid crystal composition which has excellent alignment properties, improves a surface state of an optically anisotropic layer to be formed, and improves adhesiveness with a polarizer, an optical film using the same, a polarizing plate, and an image display device. The liquid crystal composition according to the present invention is a liquid crystal composition containing a copolymer having a repeating unit represented by Formula (I) and a repeating unit represented by Formula (II), and a liquid crystal compound.
    Type: Application
    Filed: March 21, 2019
    Publication date: July 18, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Masaaki SUZUKI, Shunya KATOH, Koji IIJIMA, Yuki NAKAMURA
  • Publication number: 20190170922
    Abstract: The present invention provides an optical film exhibiting high alignment and good phase difference development in an oblique direction, and a polarizing plate and an image display device using the same. This optical film of the present invention has a substrate; and a phase difference layer which is provided on the substrate to be adjacent to the substrate, in which the phase difference layer is a layer formed by fixing vertical alignment of a liquid crystal compound having a polymerizable group included in a liquid crystal composition containing the liquid crystal compound and a polymer compound, a difference in ?a value between the polymer compound and the substrate, which is calculated using three-dimensional SP values, is 3 or less, and a content of the polymer compound is less than 10 parts by mass with respect to 100 parts by mass of the liquid crystal compound.
    Type: Application
    Filed: February 4, 2019
    Publication date: June 6, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Shunya KATOH, Koji IIJIMA, Mitsuyoshi ICHIHASHI, Masaru YOSHIKAWA
  • Publication number: 20190004225
    Abstract: The present invention relates to an optical film which ensures adhesiveness between a polymer film and a liquid crystal layer without deteriorating the alignment of a liquid crystal compound; a polarizing plate using the same; an image display device; a method for producing an optical film; and a method for producing a polarizing plate. The optical film includes a polymer film including a cycloolefin-based polymer, and a liquid crystal layer that is provided adjacent to the polymer film, in which the liquid crystal layer is formed by using a liquid crystal composition containing a liquid crystal compound and a compound having a specific structure, where the liquid crystal composition contains the compound having a specific structure at a content of 0.5% to 7.0% by mass with respect to a mass of the liquid crystal compound, and a predetermined eccentricity value is 20% to 80%.
    Type: Application
    Filed: September 6, 2018
    Publication date: January 3, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Koji IIJIMA, Tatsuya IWASAKI, Katsufumi OHMURO, Masaaki SUZUKI
  • Patent number: 10144199
    Abstract: The present invention provides a cellulose acylate film, containing: an organic acid satisfying requirements of a to c, in which a film thickness of the cellulose acylate film is greater than or equal to 3 ?m, and an average concentration of the organic acid in a region from one surface of the cellulose acylate film to a depth of 0 to 0.2 ?m is lower than an average concentration of the organic acid in a residual region other than the region: a: having a structure in which polyhydric alcohol and a polyvalent carboxylic acid are bonded by forming an ester bond; b: the total number of molecules of polyhydric alcohol and a monovalent or more carboxylic acid forming the organic acid being greater than or equal to 3; and c: having at least one non-substituted carboxyl group derived from a polyvalent carboxylic acid.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: December 4, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Takashi Tamada, Koji Iijima, Nobuhiko Ichihara
  • Publication number: 20180287036
    Abstract: A thermoelectric power generation device includes a plurality of units that are stacked, each unit including a thermoelectric module containing at least one thermoelectric element, and a first plate and a second plate interposing the thermoelectric module therebetween, wherein a spacer is interposed between a surface of one of the first plates facing away from the corresponding thermoelectric module and a surface of the opposing second plate facing away from the corresponding thermoelectric module, the spacer contacting the first plate and the second plate and defining a fluid passage jointly with the first plate and the second plate, and wherein the fluid passages defined between the adjacent units are configured to receive supply of high temperature fluid and low temperature fluid in an alternating manner in a stacking direction of the units. The plates can be conformed to the thermoelectric module, and the stiffness of the plate can be increased.
    Type: Application
    Filed: October 3, 2016
    Publication date: October 4, 2018
    Inventors: Noriaki YUKAWA, Hisashi KANOU, Toshio MITSUYASU, Yutaka MIYAMOTO, Shinji NAKAMURA, Koji IIJIMA, Minoru MATSUSHITA, Masamune YANAGIHARA, Kazuo MATSUDA, Tadashi MATSUMOTO, Toshihide HIRAI, Satoshi TANAKA
  • Publication number: 20180272593
    Abstract: A phase difference film includes a liquid crystal layer in which a disk-like liquid crystal compound is fixed in a homeotropic alignment state, in which an in-plane retardation Re of the liquid crystal layer satisfies 200 nm?Re?300 nm and a retardation Rth in a thickness direction satisfies ?30 nm?Rth.
    Type: Application
    Filed: May 29, 2018
    Publication date: September 27, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Koji IIJIMA, Jun TAKEDA, Katsufumi OHMURO
  • Publication number: 20170283701
    Abstract: A polymer is obtained by polymerizing a monomer having two or more radical polymerizable double bonds and one or more hydroxyl groups. A composition including the polymer, an optical film including a cholesteric liquid crystal layer containing the polymer on a support, and a liquid crystal display device including at least a backlight unit including the optical film and a liquid crystal cell are provided.
    Type: Application
    Filed: June 9, 2017
    Publication date: October 5, 2017
    Applicant: FUJIFILM Corporation
    Inventors: Akio TAMURA, Koji IIJIMA
  • Publication number: 20170157900
    Abstract: The present invention provides a cellulose acylate film, containing: an organic acid satisfying requirements of a to c, in which a film thickness of the cellulose acylate film is greater than or equal to 3 ?m, and an average concentration of the organic acid in a region from one surface of the cellulose acylate film to a depth of 0 to 0.2 ?m is lower than an average concentration of the organic acid in a residual region other than the region: a: having a structure in which polyhydric alcohol and a polyvalent carboxylic acid are bonded by forming an ester bond; b: the total number of molecules of polyhydric alcohol and a monovalent or more carboxylic acid forming the organic acid being greater than or equal to 3; and c: having at least one non-substituted carboxyl group derived from a polyvalent carboxylic acid.
    Type: Application
    Filed: February 15, 2017
    Publication date: June 8, 2017
    Applicant: FUJIFILM Corporation
    Inventors: Takashi TAMADA, Koji IIJIMA, Nobuhiko ICHIHARA
  • Publication number: 20110244218
    Abstract: A coating composition is provided and includes: (a) inorganic particles having an average particle size of 1 to 100 nm; (b) an ionizing radiation-curing material for forming a binder; (c) a photopolymerization initiator; and (d) an organic solvent. The coating composition preferably includes a monomer having at least two hydroxyl groups per molecule in a mass fraction of 0.1 to 3.0 mass % relative to the total solid content of the composition.
    Type: Application
    Filed: March 30, 2011
    Publication date: October 6, 2011
    Applicant: FUJIFILM Corporation
    Inventors: Takato Suzuki, Kenichi Fukuda, Koji Iijima
  • Patent number: 8015802
    Abstract: An inlet chamber 40 and outlet chamber 50 for exhaust gas are integrated as an inflow/outflow section 80, and a first post treatment device 10 equipped with a DPF 13 at its central portion and second post-treatment device 20 equipped with a urea DeNOx catalyst 23 on its outer periphery side are integrated as a catalyst installation section 70. The catalyst installation section 70, the inflow/outflow section 80, and a communication chamber forming section 30 are provided separately and detachably from one another, and the catalyst installation section 70 is made installable in a reversible manner. As a result, by reversing the catalyst installation section 70, it is possible to easily reverse the DPF 13 without having to extract it from the central part. Further, since the urea DeNOx catalyst 23 is reversed simultaneously, it is possible to change the direction in which the exhaust gas flows therein, thereby enabling to prevent unbalanced deterioration of the urea DeNOx catalyst 23.
    Type: Grant
    Filed: November 24, 2005
    Date of Patent: September 13, 2011
    Assignee: Komatsu Ltd.
    Inventors: Toshihiko Nishiyama, Koji Iijima
  • Patent number: 7995429
    Abstract: There are provided an optical disk device and tilt correction processing method for performing recording/reproduction by rapidly acquiring an optimal tilt correction value for an optical disk having a plurality of recording/reproducing layers. In an optical disk device capable of recording or reproducing information by irradiating a laser beam to each of a plurality of recording/reproducing layers of an optical disk, the tilt value is stepwise set within a predetermined range at a predetermined radius position of the recording/reproducing layer located at the farthest distance from the laser beam irradiation side so that an optimal tilt correction value can be obtained from the quadratic function by the method of least squares of the jitter or the like obtained from the disk. By applying the optimal tilt value obtained to the other recording/reproducing layer, it is possible to start recording or reproduction in a short time.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: August 9, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Koji Iijima, Motoyuki Suzuki, Junji Nakajima
  • Publication number: 20100260779
    Abstract: A molecule capable of potentiating immune responses and modifying existing states of immune responsiveness is described. Also described are compositions containing the molecule, as well as methods for using the molecule and the compositions to enhance immune responses, to enhance DC function, to modify an existing state of immune responsiveness, to immunize individuals, or to treat or inhibit conditions such as allergic asthma.
    Type: Application
    Filed: January 29, 2009
    Publication date: October 14, 2010
    Inventors: Suresh Radhakrishnan, Larry R. Pease, Hirohito Kita, Koji Iijima
  • Publication number: 20100074069
    Abstract: There are provided an optical disk device and tilt correction processing method for performing recording/reproduction by rapidly acquiring an optimal tilt correction value for an optical disk having a plurality of recording/reproducing layers. In an optical disk device capable of recording or reproducing information by irradiating a laser beam to each of a plurality of recording/reproducing layers of an optical disk, the tilt value is stepwise set within a predetermined range at a predetermined radius position of the recording/reproducing layer located at the farthest distance from the laser beam irradiation side so that an optimal tilt correction value can be obtained from the quadratic function by the method of least squares of the jitter or the like obtained from the disk. By applying the optimal tilt value obtained to the other recording/reproducing layer, it is possible to start recording or reproduction in a short time.
    Type: Application
    Filed: December 2, 2009
    Publication date: March 25, 2010
    Applicant: Hitachi, Ltd.
    Inventors: Koji Iijima, Motoyuki Suzuki, Junji Nakajima
  • Patent number: 7643392
    Abstract: There are provided an optical disk device and tilt correction processing method for performing recording/reproduction by rapidly acquiring an optimal tilt correction value for an optical disk having a plurality of recording/reproducing layers. In an optical disk device capable of recording or reproducing information by irradiating a laser beam to each of a plurality of recording/reproducing layers of an optical disk, the tilt value is stepwise set within a predetermined range at a predetermined radius position of the recording/reproducing layer located at the farthest distance from the laser beam irradiation side so that an optimal tilt correction value can be obtained from the quadratic function by the method of least squares of the jitter or the like obtained from the disk. By applying the optimal tilt value obtained to the other recording/reproducing layer, it is possible to start recording or reproduction in a short time.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: January 5, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Koji Iijima, Motoyuki Suzuki, Junji Nakajima