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).

  • 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: 20200264357
    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: Application
    Filed: May 5, 2020
    Publication date: August 20, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Shinichi YOSHINARI, Ayako MURAMATSU, Naoya SHIBATA, Kunihiro ATSUMI, Daisuke KASHIWAGI
  • 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
  • Patent number: 10698144
    Abstract: A phase difference film is formed by using a liquid crystal compound and that indicates an Nz factor of more than 0 and less than 1, an optical film with same, and a display device. The phase difference film is formed by using a composition including a polymerizable liquid crystal compound having a mesogen group, where an order parameter of the mesogen group in an in-plane slow axis direction of the phase difference film is set as Sx, an order parameter of the mesogen group in a direction orthogonal to the in-plane slow axis direction in a plane is set as Sy, and an order parameter of the mesogen group in a thickness direction of the phase difference film is set as Sz, in a case where the mesogen group has a rod or a disc shape, differing Expressions are satisfied.
    Type: Grant
    Filed: June 19, 2019
    Date of Patent: June 30, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Kunihiro Atsumi, Yukito Saitoh, Shinichi Morishima
  • Patent number: 10605971
    Abstract: The present invention includes an optical element of which an oblique tint change can be improved in a case of the optical element is incorporated to a liquid crystal display device, a method of manufacturing an optical element, and a liquid crystal display device. The optical element includes: a reflection polarizer which is formed of a discotic liquid crystal compound and in which a cholesteric liquid crystalline phase is immobilized, in which, in the reflection polarizer, a front retardation value Re satisfies 0 nm?Re<10 nm in a range of ±50 nm outside a reflection center wavelength, and an absolute value |Ret (50°)| of a retardation value Ret in a polar angle 50° direction satisfies |Ret (50°)|?50 nm.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: March 31, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Kunihiro Atsumi, Yukito Saitoh, Katsufumi Ohmuro, Jun Takeda, Shinichi Morishima
  • Publication number: 20200095503
    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: Application
    Filed: November 18, 2019
    Publication date: March 26, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Hideyuki NISHIKAWA, Kunihiro ATSUMI, Yutaka NOZOE, Yuki NAKAZAWA
  • Publication number: 20200079885
    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: Application
    Filed: November 13, 2019
    Publication date: March 12, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Akio TAMURA, Reiko INUSHIMA, Takashi IIZUMI, Yutaka NOZOE, Hideyuki NISHIKAWA, Kazushige NAKAGAWA, Kunihiro ATSUMI
  • Publication number: 20200075896
    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: Application
    Filed: November 8, 2019
    Publication date: March 5, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Ayako MURAMATSU, Daisuke KASHIWAGI, Shinichi YOSHINARI, Kunihiro ATSUMI, Ryoji GOTO
  • Publication number: 20200041708
    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: Application
    Filed: October 9, 2019
    Publication date: February 6, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Yukito SAITOH, Kunihiro ATSUMI, Teruki NIORI, Shinichi MORISHIMA
  • Publication number: 20200013835
    Abstract: The present invention provides an organic electroluminescent display device in which reflection of external light is suppressed and a change in tint in a case of being viewed in an oblique direction is further suppressed, a phase difference film, and a circular polarization plate. This organic electroluminescent display device according to the present invention includes an organic electroluminescence display panel and a circular polarization plate arranged on the organic electroluminescence display panel, in which the circular polarization plate includes a polarizer and a phase difference film, the phase difference film includes a positive A-plate and a positive C-plate, and the positive A-plate and the positive C-plate satisfy prescribed requirements.
    Type: Application
    Filed: September 19, 2019
    Publication date: January 9, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Ayako MURAMATSU, Kunihiro ATSUMI, Ryo SATAKE, Mayumi NOJIRI
  • Publication number: 20200003942
    Abstract: The present invention provides: an organic electroluminescent display device that further suppresses reflection of external light when viewed in an oblique direction; a phase difference film; and a circularly polarizing plate. This display device has an organic electroluminescent display panel, and a circularly polarizing plate arranged on the display panel, in which the circularly polarizing plate has a polarizer and a phase difference film, the phase difference film has, from a side of the polarizer, a negative A-plate, and a positive A-plate, the in-plane retardation of the negative A-plate at a wavelength of 550 nm is more than 50 nm and less than 90 nm, and the in-plane retardation of the positive A-plate at a wavelength of 550 nm is 100 to 200 nm, and the angle formed by the in-plane slow axis of the negative A-plate and the in-plane slow axis of the positive A-plate is 45°±10°.
    Type: Application
    Filed: September 5, 2019
    Publication date: January 2, 2020
    Applicant: FUJIFILM Corporation
    Inventor: Kunihiro ATSUMI
  • Patent number: 10495791
    Abstract: The present invention provides an optical film including a light reflection layer, in which the light reflection layer is a layer in which alignment of liquid crystal molecules is immobilized, the liquid crystal molecule forms a helical structure in a film thickness direction of the light reflection layer, and a tilt angle of the liquid crystal molecule is 15° to 55°. The present invention also provides a manufacturing method of the optical film including curing a polymerizable liquid crystal composition including a liquid crystal compound and a chiral agent interposed between a support and another support. In the optical film according to the present invention, an absolute value of oblique retardation is smaller. In the liquid crystal display device including the optical film, front surface brightness is high and an oblique change in the shade is suppressed.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: December 3, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Yukito Saitoh, Hideyuki Nishikawa, Kunihiro Atsumi, Wataru Hoshino, Yoshiaki Takada
  • Publication number: 20190353957
    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: Application
    Filed: August 1, 2019
    Publication date: November 21, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Kunihiro ATSUMI, Yukito SAITOH
  • Publication number: 20190302334
    Abstract: A phase difference film is formed by using a liquid crystal compound and that indicates an Nz factor of more than 0 and less than 1, an optical film with same, and a display device. The phase difference film is formed by using a composition including a polymerizable liquid crystal compound having a mesogen group, where an order parameter of the mesogen group in an in-plane slow axis direction of the phase difference film is set as Sx, an order parameter of the mesogen group in a direction orthogonal to the in-plane slow axis direction in a plane is set as Sy, and an order parameter of the mesogen group in a thickness direction of the phase difference film is set as Sz, in a case where the mesogen group has a rod or a disc shape, differing Expressions are satisfied.
    Type: Application
    Filed: June 19, 2019
    Publication date: October 3, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Kunihiro ATSUMI, Yukito SAITOH, Shinichi MORISHIMA
  • Publication number: 20190288240
    Abstract: The present invention provides a circularly polarizing plate applied to a display device, which further suppresses reflection of external light and a change in tint when viewed in an oblique direction, and an organic electroluminescent display device. The circularly polarizing plate has a polarizer, a ?/2 plate, and a ?/4 plate in this order, in which an angle formed between an absorption axis of the polarizer and an in-plane slow axis of the ?/4 plate is in a range of 20° to 70°, an Nz factor of the ?/4 plate is 0.30 to 0.70, the absorption axis of the polarizer and an in-plane slow axis of the ?/2 plate are orthogonal or parallel to each other, at Nz factor of the ?/2 plate being 0.10 to 0.40, and the Nz factor of the ?/2 plate being 0.60 to 0.90, respectively.
    Type: Application
    Filed: May 23, 2019
    Publication date: September 19, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Kunihiro ATSUMI, Yukito SAITOH