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: 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
  • Patent number: 10365419
    Abstract: The polarizing plate of the present invention includes a polarizer and an optical element that rotates a polarization plane of polarized light emitted from the polarizer, an orientation direction on a surface of the optical element on a polarizer side is parallel to an absorption axis of the polarizer, an orientation direction on a surface of the optical element opposite to the polarizer is perpendicular to the absorption axis of the polarizer, and ?nd and a birefringence parameter RH of the optical element fall in a range of a predetermined region in an orthogonal coordinate in which ?nd is indicated along a vertical axis and the birefringence parameter RH is indicated along a lateral axis.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: July 30, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Junichi Hirakata, Yujiro Yanai, Yoshiaki Hisakado, Kunihiro Atsumi, Yukito Saitoh
  • Publication number: 20190204614
    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: Application
    Filed: March 11, 2019
    Publication date: July 4, 2019
    Inventors: Yukito SAITOH, Kunihiro ATSUMI, Naoyoshi YAMADA, Daisuke KASHIWAGI, Shigeaki NIMURA, Mitsuyoshi ICHIHASHI, Rie TAKASAGO
  • Publication number: 20180356578
    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: Application
    Filed: August 21, 2018
    Publication date: December 13, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Kunihiro ATSUMI, Yukito SAITO, Shinichi MORISHIMA, Wataru HOSHINO
  • Publication number: 20180215843
    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: Application
    Filed: March 29, 2018
    Publication date: August 2, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Wataru HOSHINO, Yukito SAITOH, Kunihiro ATSUMI
  • Publication number: 20180164481
    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: Application
    Filed: February 12, 2018
    Publication date: June 14, 2018
    Applicant: FUJIFILM Corporation
    Inventors: Kunihiro ATSUMI, Yukito SAITOH, Katsufumi OHMURO, Jun TAKEDA, Shinichi MORISHIMA
  • Publication number: 20170363791
    Abstract: The polarizing plate of the present invention includes a polarizer and an optical element that rotates a polarization plane of polarized light emitted from the polarizer, an orientation direction on a surface of the optical element on a polarizer side is parallel to an absorption axis of the polarizer, an orientation direction on a surface of the optical element opposite to the polarizer is perpendicular to the absorption axis of the polarizer, and ?nd and a birefringence parameter RH of the optical element fall in a range of a predetermined region in an orthogonal coordinate in which ?nd is indicated along a vertical axis and the birefringence parameter RH is indicated along a lateral axis.
    Type: Application
    Filed: August 30, 2017
    Publication date: December 21, 2017
    Applicant: FUJIFILM Corporation
    Inventors: Junichi HIRAKATA, Yujiro YANAI, Yoshiaki HISAKADO, Kunihiro ATSUMI, Yukito SAITOH
  • Publication number: 20170299785
    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: Application
    Filed: June 30, 2017
    Publication date: October 19, 2017
    Applicant: FUJIFILM Corporation
    Inventors: Yukito SAITOH, Hideyuki NISHIKAWA, Kunihiro ATSUMI, Wataru HOSHINO, Yoshiaki TAKADA
  • Patent number: 8623472
    Abstract: A cellulose acylate film is provided and has a surface where a first in-plane orientation in a portion from 0 to 3 ?m in depth from the surface is lower than a second in-plane orientation in a portion from 3 ?m to 10 ?m in depth from the surface.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: January 7, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Yasuyuki Sasada, Hajime Nakayama, Shinya Watanabe, Kunihiro Atsumi
  • Publication number: 20120018685
    Abstract: An optical film contains a cellulose ester and more than 30% by mass, relative to the cellulose ester, of a condensation product of at least one polyhydric alcohol having an average of 2.01 or more carbon atoms and at least one polybasic acid having an average of 4.10 or more carbon atoms, and at least one of the at least one polyhydric alcohol contains at least three carbon atoms bonded together without being interrupted by any other atom.
    Type: Application
    Filed: July 19, 2011
    Publication date: January 26, 2012
    Applicant: FUJIFILM Corporation
    Inventors: Yasuyuki Sasada, Mitsuo Osato, Fumitake Mitobe, Kunihiro Atsumi, Hiroyuki Kawanishi, Ryo Suzuki
  • Patent number: 8089593
    Abstract: An optical resin film is provided, in which a wavelength dispersion of a retardation in planar direction and a wavelength dispersion of a retardation in thickness direction are independently controlled, is provided and has at least an additive having a negative intrinsic birefringence.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: January 3, 2012
    Assignee: Fujifilm Corporation
    Inventors: Hiromoto Haruta, Nobutaka Fukagawa, Osamu Uchida, Aiko Yoshida, Kunihiro Atsumi
  • Patent number: 8026357
    Abstract: A cellulose acylate film, comprising a cellulose acylate having at least one substituent (Substituent A) comprising an aromatic group having at least one C4 or longer aliphatic group, is disclosed.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: September 27, 2011
    Assignee: FUJIFILM Corporation
    Inventors: Tomoko Kuwabara, Kunihiro Atsumi
  • Patent number: 7796205
    Abstract: A polymer film, wherein when any point in the polymer film is taken as a center, a maximum difference between high and low film thicknesses within a range of 60 mm diameter is not more than 1 ?m, an RMS value of a film thickness is 0 ?m to 0.15 ?m or a difference between maximum and minimum values of slow axis angle in any 60 mm×60 mm square in the polymer film is 0° to 0.40°; and a solution casting film-forming method comprising: casting a dope on a support; peeling the casted film, wherein a dry wind of 3 m/s to 15 m/s is applied to the casted film within 15 seconds from the casting, and wherein before the dry wind is applied to the casted film, an air floating on a surface of the casted film has a wind velocity of less than 3 m/s.
    Type: Grant
    Filed: August 25, 2006
    Date of Patent: September 14, 2010
    Assignee: Fujifilm Corporation
    Inventors: Masaya Suzuki, Hirofumi Toyama, Koju Ito, Katsumi Sasata, Hiromoto Haruta, Kunihiro Atsumi, Takashi Murooka
  • Publication number: 20100055354
    Abstract: A cellulose acylate film is provided and has a surface where a first in-plane orientation in a portion from 0 to 3 ?m in depth from the surface is lower than a second in-plane orientation in a portion from 3 ?m to 10 ?m in depth from the surface.
    Type: Application
    Filed: August 27, 2009
    Publication date: March 4, 2010
    Inventors: Yasuyuki SASADA, Hajime Nakayama, Shinya Watanabe, Kunihiro Atsumi
  • Patent number: 7615264
    Abstract: A cellulose acylate film comprising a compound having a hydrogen-donating group capable of forming a hydrogen bond and an aromatic ring, and a compound represented by the following formula: wherein R2, R4, and R5 represent H or a substituent, R11 and R13 represent H or an alkyl group, L1 and L2 represent a single bond or a divalent linking group, Ar1 represents an arylene group or a divalent aromatic heterocyclic group, Ar2 represents an aryl group or a monovalent aromatic heterocyclic group, n represents an integer of 3 or more.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: November 10, 2009
    Assignee: Fujifilm Corporation
    Inventors: Nobutaka Fukagawa, Shigeo Uehira, Yutaka Nozoe, Kunihiro Atsumi
  • Patent number: 7611760
    Abstract: A cellulose acylate film is provided and has an elasticity modulus of 4,800 MPa to 10,000 MPa in at least either a machine direction MD at film-formation time or a direction TD perpendicular to the machine direction.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: November 3, 2009
    Assignee: Fujifilm Corporation
    Inventors: Hidenori Hayashi, Keiichi Taguchi, Kunihiro Atsumi, Yutaka Nozoe
  • Publication number: 20090247739
    Abstract: A cellulosic substance composition includes: a cellulosic substance having a branched structure or cyclic structure-containing aliphatic acyl group (A) having from 4 to 30 carbon atoms, the aliphatic acyl group (A) being represented by formula (1): wherein R11, R12 and R13 each independently represents a hydrogen atom or an alkyl group, provided that at least two of R11, R12 and R13 are an alkyl group; R11, R12 and R13 may each independently have a substituent; at least two of R11, R12 and R13 may be connected to each other to form a ring; and a portion of * represents a bond to a cellulose skeleton of the cellulosic substance.
    Type: Application
    Filed: March 26, 2009
    Publication date: October 1, 2009
    Applicant: FUJIFILM Corporation
    Inventors: Yutaka Nozoe, Tomoko Kuwabara, Kunihiro Atsumi
  • Publication number: 20090135344
    Abstract: A polymer film, wherein when any point in the polymer film is taken as a center, a maximum difference between high and low film thicknesses within a range of 60 mm diameter is not more than 1 ?m, an RMS value of a film thickness is 0 ?m to 0.15 ?m or a difference between maximum and minimum values of slow axis angle in any 60 mm×60 mm square in the polymer film is 0° to 0.40°; and a solution casting film-forming method comprising: casting a dope on a support; peeling the casted film, wherein a dry wind of 3 m/s to 15 m/s is applied to the casted film within 15 seconds from the casting, and wherein before the dry wind is applied to the casted film, an air floating on a surface of the casted film has a wind velocity of less than 3 m/s.
    Type: Application
    Filed: August 25, 2006
    Publication date: May 28, 2009
    Applicant: Fujifilm Corporation
    Inventors: Masaya Suzuki, Hirofumi Toyama, Koju Ito, Katsumi Sasata, Hiromoto Haruta, Kunihiro Atsumi, Takashi Murooka
  • Publication number: 20090111981
    Abstract: A cellulose acylate film, comprising a cellulose acylate having at least one substituent (Substituent A) comprising an aromatic group having at least one C4 or longer aliphatic group, is disclosed.
    Type: Application
    Filed: October 29, 2008
    Publication date: April 30, 2009
    Applicant: FUJIFILM Corporation
    Inventors: Tomoko Kuwabara, Kunihiro Atsumi
  • Publication number: 20090082557
    Abstract: A novel cellulose acylate film is disclosed. The film is formed of a composition comprising at least one cellulose acylate having an aromatic group-containing acyl group (Substituent A), in which a substitution degree with Substituent A satisfies following relational expressions (I) and (II): ?0.25?SA2+DSA3?DSA6?0.20, ??(I) 0.35?DSA2+DSA3+DSA6, ??(II) wherein DSA2, DSA3 and DSA6 each indicate a substitution degree with Substituent A at the 2-, 3- and 6-positions of the cellulose acylate.
    Type: Application
    Filed: September 19, 2008
    Publication date: March 26, 2009
    Applicant: FUJIFILM Corporation
    Inventors: Tomoko KUWABARA, Kunihiro ATSUMI