Patents by Inventor Kunihiro Atsumi

Kunihiro Atsumi 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: 20240085606
    Abstract: A laminate in which the occurrence of cracks is suppressed, and a laminate with a pressure-sensitive adhesive layer, a polarizing plate, and an image display device which use the laminate. The laminate includes a first optically anisotropic layer; and a second optically anisotropic layer, the first optically anisotropic layer and the second optically anisotropic layer being laminated directly or through an alignment film, in which the first optically anisotropic layer satisfies Expression (A) nx>ny, the second optically anisotropic layer satisfies Expression (B) nx<nz, the laminate satisfies Expressions (1) 100 nm?Re(550)?180 nm, Expression (2) Re(450)/Re(550)<1.0, Expression (3) Re(650)/Re(550)>1.0, Expression (4) ?40 nm?Rth(550)?70 nm, and Expression (5) Rth(550)<Re(550)/2, and an endothermic peak temperature of the laminate observed by differential scanning calorimetry is 125° C. or lower.
    Type: Application
    Filed: October 17, 2023
    Publication date: March 14, 2024
    Applicant: FUJIFILM Corporation
    Inventors: Jun ISHIYAMA, Kunihiro ATSUMI, Ayako MURAMATSU
  • Publication number: 20230213695
    Abstract: An object of the present invention is to provide a laminate which includes a light absorption anisotropic layer and an optically anisotropic layer and has excellent moisture-heat resistance, and a polarizing plate and an image display device which are formed of the laminate. The laminate of the present invention is a laminate including a light absorption anisotropic layer and an optically anisotropic layer, in which the light absorption anisotropic layer contains an organic dichroic substance, the optically anisotropic layer consists of a liquid crystal layer, an axial direction of an absorption axis of the light absorption anisotropic layer is different from an axial direction of a slow axis of the optically anisotropic layer, and the light absorption anisotropic layer and the optically anisotropic layer are directly laminated.
    Type: Application
    Filed: March 10, 2023
    Publication date: July 6, 2023
    Applicant: FUJIFILM Corporation
    Inventors: Kunihiro ATSUMI, Naoya SHIBATA
  • Patent number: 11692050
    Abstract: An object of the invention is to provide a photo-alignment copolymer capable of improving upper layer coatability after layer formation, a binder composition, a binder layer, an optical laminate, and an image display device. A photo-alignment copolymer according to the embodiment of the invention has a repeating unit A including a photo-alignment group, a repeating unit B including a crosslinkable group which causes a crosslinking reaction by the action of at least one selected from the group consisting of light, heat, an acid, and a base, and a repeating unit C including a cleaving group which decomposes by the action of at least one selected from the group consisting of light, heat, an acid, and a base to produce a polar group, and the repeating unit C has the cleaving group on a side chain, and has a group of atoms which is provided on a side closer to a terminal than the cleaving group on the side chain to be able to unevenly distribute the photo-alignment copolymer on an air interface side.
    Type: Grant
    Filed: May 27, 2021
    Date of Patent: July 4, 2023
    Assignee: FUJIFILM Corporation
    Inventors: Yutaka Nozoe, Takashi Iizumi, Soichiro Watanabe, Hideyuki Nishikawa, Kazushige Nakagawa, Kunihiro Atsumi
  • Publication number: 20230138456
    Abstract: An object of the present invention is to provide a binder composition in which air unevenness is suppressed and which has excellent upper layer coating properties after being formed as a layer, a compound, a binder layer, an optical laminate, an optical laminate manufacturing method, and an image display device. The binder composition of the present invention is a binder composition containing a binder and a compound having a group represented by Formula (B1) or (B2). In Formulae (B1) and (B2), Z represents an aliphatic hydrocarbon group having a fluorine atom or an organosiloxane group.
    Type: Application
    Filed: December 28, 2022
    Publication date: May 4, 2023
    Applicant: FUJIFILM Corporation
    Inventors: Takashi IIZUMI, Soichiro WATANABE, Yutaka NOZOE, Kazushige NAKAGAWA, Kunihiro ATSUMI
  • Publication number: 20230088847
    Abstract: An object of the present invention is to provide an optical laminate in which an optically anisotropic layer provided as an upper layer has good liquid crystal alignment properties, and a polarizing plate and an image display device using the optical laminate. An optical laminate of the present invention is an optical laminate including: a first optically anisotropic layer; and a second optically anisotropic layer, in which the first and second optically anisotropic layers are directly laminated, each of the first and second optically anisotropic layers consists of a liquid crystal layer, and a photo-alignment polymer having a photo-alignment group and at least one type of polar group selected from the group consisting of a hydroxyl group and a ketone group is present in a surface of the second optically anisotropic layer on a side in contact with the first optically anisotropic layer.
    Type: Application
    Filed: August 16, 2022
    Publication date: March 23, 2023
    Applicant: FUJIFILM Corporation
    Inventors: Kunihiro ATSUMI, Kazushige NAKAGAWA, Yutaka NOZOE, Takashi IIZUMI, Soichiro WATANABE
  • Patent number: 11435511
    Abstract: An object of the present invention is to provide is an optical laminate film exhibiting excellent uniformity in reflection tint and an organic EL display device using this optical laminate film and exhibiting excellent uniformity in reflection tint when turned off.
    Type: Grant
    Filed: May 5, 2020
    Date of Patent: September 6, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Shinichi Yoshinari, Ayako Muramatsu, Naoya Shibata, Kunihiro Atsumi, Daisuke Kashiwagi
  • Publication number: 20220179250
    Abstract: The present invention provides a photo-alignment polymer having excellent liquid crystal aligning properties, a binder composition, a binder layer, an optical laminate, an optical laminate manufacturing method, and an image display device. A photo-alignment polymer according to the embodiment of the present invention has a repeating unit having a photo-alignment group and a repeating unit having a group represented by Formula (1).
    Type: Application
    Filed: February 22, 2022
    Publication date: June 9, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Takashi IIZUMI, Soichiro WATANABE, Yutaka NOZOE, Kunihiro ATSUMI
  • Patent number: 11333813
    Abstract: An optical film is an optical film in which a cholesteric liquid crystalline phase is fixed and a helical axis of the cholesteric liquid crystalline phase is aligned in an in-plane uniaxial direction, and an Nz is 0.2 to 0.75.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: May 17, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Yukito Saitoh, Kunihiro Atsumi, Teruki Niori, Shinichi Morishima
  • Patent number: 11319393
    Abstract: An object of the present invention is to provide a photo-alignable polymer which has excellent coating properties, is capable of suppressing film thickness unevenness, and has excellent upper layer coating properties and good liquid crystal alignment properties after being formed as a layer; a binder composition; a binder layer; an optical laminate; a method for producing an optical laminate; and an image display device. The photo-alignable polymer of an embodiment of the present invention is a photo-alignable polymer having a repeating unit A including a cleavage group capable of decomposing by an action of at least one selected from the group consisting of light, heat, an acid, and a base to generate a polar group, in which the repeating unit A has the cleavage group in a side chain, has a fluorine atom or a silicon atom on a side closer to a terminal than the cleavage group in the side chain, and the photo-alignable polymer satisfies Condition 1 or Condition 2 shown below.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: May 3, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Akio Tamura, Reiko Inushima, Takashi Iizumi, Yutaka Nozoe, Hideyuki Nishikawa, Kazushige Nakagawa, Kunihiro Atsumi
  • Patent number: 11186775
    Abstract: An object of the present invention is to provide a polymerizable liquid crystal composition which has excellent coating properties, is capable of suppressing film thickness unevenness, and has good coating properties for an upper layer coating liquid after being formed as an optically anisotropic layer, an anisotropic layer formed using the same; an optical laminate; a method for producing an optical laminate, and an image display device. The polymerizable liquid crystal composition of the embodiment of the present invention is a polymerizable liquid crystal composition containing a polymerizable liquid crystal compound, a polymerization initiator, and a compound having a monovalent specific group including a cleavage group capable of decomposing by an action of at least one selected from the group consisting of light, heat, an acid, and a base to generate a polar group, in which the specific group has a fluorine atom or a silicon atom on a side closer to a terminal than the cleavage group.
    Type: Grant
    Filed: November 18, 2019
    Date of Patent: November 30, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Hideyuki Nishikawa, Kunihiro Atsumi, Yutaka Nozoe, Yuki Nakazawa
  • Patent number: 11180661
    Abstract: An object of the present invention is to provide a binder composition which is excellent in upper layer coatability after being formed as a binder layer and can improve liquid crystal aligning properties, a binder layer, an optical laminate, and an image display device. A binder composition according to the embodiment of the present invention is a binder composition containing: a binder; a polymerization initiator; a surfactant; and a photo-alignment agent, in which the surfactant and the photo-alignment agent include functional groups capable of hydrogen bonding with each other, and the functional group capable of hydrogen bonding included in any one of the surfactant or the photo-alignment agent is a proton-donating functional group, and the functional group included in the other of the surfactant or the photo-alignment agent is a proton-accepting functional group.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: November 23, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Hideyuki Nishikawa, Kunihiro Atsumi
  • Patent number: 11169389
    Abstract: An optical laminate includes a cholesteric liquid crystal layer and a lenticular lens which is laminated on the cholesteric liquid crystal layer, the cholesteric liquid crystal layer has a plurality of regions which are arranged in a pattern in an arrangement direction of lenses of the lenticular lens and are different from each other in terms of the reflection center wavelength for front incident light, and among the plurality of regions, a region having the shortest reflection center wavelength is disposed at a focus position of the lenticular lens for the front incident light, and among the plurality of regions, a region having a longer reflection center wavelength is disposed further away from the focus position.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: November 9, 2021
    Assignee: FUJIFILM CORPORATION
    Inventors: Yukito Saitoh, Kunihiro Atsumi, Naoyoshi Yamada, Daisuke Kashiwagi, Shigeaki Nimura, Mitsuyoshi Ichihashi, Rie Takasago
  • Publication number: 20210292456
    Abstract: An object of the invention is to provide a photo-alignment copolymer capable of improving upper layer coatability after layer formation, a binder composition, a binder layer, an optical laminate, and an image display device. A photo-alignment copolymer according to the embodiment of the invention has a repeating unit A including a photo-alignment group, a repeating unit B including a crosslinkable group which causes a crosslinking reaction by the action of at least one selected from the group consisting of light, heat, an acid, and a base, and a repeating unit C including a cleaving group which decomposes by the action of at least one selected from the group consisting of light, heat, an acid, and a base to produce a polar group, and the repeating unit C has the cleaving group on a side chain, and has a group of atoms which is provided on a side closer to a terminal than the cleaving group on the side chain to be able to unevenly distribute the photo-alignment copolymer on an air interface side.
    Type: Application
    Filed: May 27, 2021
    Publication date: September 23, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Yutaka NOZOE, Takashi IIZUMI, Soichiro WATANABE, Hideyuki NISHIKAWA, Kazushige NAKAGAWA, Kunihiro ATSUMI
  • Patent number: 11029557
    Abstract: An object of the present invention is to provide is an optical laminate film exhibiting excellent reflection tint and an organic EL display device using this optical laminate film and exhibiting excellent reflection tint when turned off. The object is achieved by providing an optical laminate film including a polarizer, a phase difference layer, and a circularly polarized light separating layer in this order, in which an in-plane retardation Re(550) of the phase difference layer is 120 to 160 nm, the polarizer and the phase difference layer are arranged to form an angle of 45°±10°, the circularly polarized light separating layer is a cholesteric liquid crystal layer formed by fixing a cholesteric liquid crystalline phase and having a liquid crystalline molecule as a main component, and Re(550) is 0.5 to 3.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: June 8, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Shinichi Yoshinari, Ayako Muramatsu, Naoya Shibata, Kunihiro Atsumi, Daisuke Kashiwagi
  • Patent number: 10961328
    Abstract: An optical film including: a cholesteric layer of a disk-like liquid crystal composition including a disk-like liquid crystal compound, in which the cholesteric layer exhibits a cholesteric liquid crystalline phase, and in which fluctuation of a helical pitch in a film thickness direction of the cholesteric layer is 2% or greater, and having a cholesteric liquid crystalline phase of a disk-like liquid crystal compound and a wide reflection bandwidth; a brightness enhancement film; a backlight unit with a brightness enhancement film; and a liquid crystal display device.
    Type: Grant
    Filed: March 29, 2018
    Date of Patent: March 30, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Wataru Hoshino, Yukito Saitoh, Kunihiro Atsumi
  • Patent number: 10955601
    Abstract: An optical film includes a liquid crystal layer derived from a smectic phase, wherein an Nz factor of the liquid crystal layer is from 0.2 to 0.8. A display device that includes the optical film, and a method of producing an optical film is also provided.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: March 23, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Kunihiro Atsumi, Yukito Saito, Shinichi Morishima, Wataru Hoshino
  • Patent number: 10935836
    Abstract: The present invention provides an organic electroluminescent display device that further suppresses reflection of external light and a change in tint in a case of being viewed in an oblique direction, a phase difference film, and a circularly polarizing plate. This organic electroluminescent display device has an organic electroluminescent display panel and a circularly polarizing plate. The circularly polarizing plate has a polarizer and a phase difference film. The phase difference film has, from the polarizer side, a positive A-plate, a first positive C-plate, and a ?/4 plate. The positive A-plate and the first positive C-plate have predetermined optical properties. The in-plane slow axis of the positive A-plate and the absorption axis of the polarizer are orthogonal to each other. The angle formed between the in-plane slow axis of the positive A-plate and the in-plane slow axis of the ?/4 A plate is 45°±10°.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: March 2, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Kunihiro Atsumi, Yukito Saitoh
  • Patent number: 10854852
    Abstract: The present invention provides an organic EL image display device including a light emitting element substrate, and a circularly polarizing plate, in which the light emitting element substrate includes a reflecting layer and an organic electroluminescent layer on the reflecting layer, the reflecting layer, the organic electroluminescent layer, and the circularly polarizing plate are arranged in this order, a polarization separation layer is provided between the organic electroluminescent layer and the circularly polarizing plate, the polarization separation layer includes a polarization separation region that reflects light of one polarization state in light emitted from the organic electroluminescent layer, and transmits light of another polarization state, and a visible light transmission region, the polarization separation region is formed of a layer formed by immobilizing a cholesteric liquid crystalline phase, and a positive C region-containing layer is provided between the organic electroluminescent lay
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: December 1, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Ayako Muramatsu, Daisuke Kashiwagi, Shinichi Yoshinari, Kunihiro Atsumi, Ryoji Goto
  • Publication number: 20200354583
    Abstract: An object of the present invention is to provide a binder composition which is excellent in upper layer coatability after being formed as a binder layer and can improve liquid crystal aligning properties, a binder layer, an optical laminate, and an image display device. A binder composition according to the embodiment of the present invention is a binder composition containing: a binder; a polymerization initiator; a surfactant; and a photo-alignment agent, in which the surfactant and the photo-alignment agent include functional groups capable of hydrogen bonding with each other, and the functional group capable of hydrogen bonding included in any one of the surfactant or the photo-alignment agent is a proton-donating functional group, and the functional group included in the other of the surfactant or the photo-alignment agent is a proton-accepting functional group.
    Type: Application
    Filed: July 24, 2020
    Publication date: November 12, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Hideyuki NISHIKAWA, Kunihiro ATSUMI
  • Publication number: 20200264475
    Abstract: An object of the present invention is to provide is an optical laminate film exhibiting excellent reflection tint and an organic EL display device using this optical laminate film and exhibiting excellent reflection tint when turned off. The object is achieved by providing an optical laminate film including a polarizer, a phase difference layer, and a circularly polarized light separating layer in this order, in which an in-plane retardation Re(550) of the phase difference layer is 120 to 160 nm, the polarizer and the phase difference layer are arranged to form an angle of 45°±10°, the circularly polarized light separating layer is a cholesteric liquid crystal layer formed by fixing a cholesteric liquid crystalline phase and having a liquid crystalline molecule as a main component, and Re(550) is 0.5 to 3.
    Type: Application
    Filed: May 4, 2020
    Publication date: August 20, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Shinichi YOSHINARI, Ayako MURAMATSU, Naoya SHIBATA, Kunihiro ATSUMI, Daisuke KASHIWAGI