Patents by Inventor Yasuhiro Kuwana

Yasuhiro Kuwana 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: 20210108142
    Abstract: To provide a polarized luminescent film obtained by applying, to a substrate material, a polymerizable composition including a rod-like luminescent nanocrystal and a polymerizable liquid crystal compound, and radiating an active energy ray, and to provide a film having good polarization characteristics. The present invention provides a polarized luminescent film and a polarized luminescent multilayered body formed from a polymerizable composition containing a rod-like luminescent nanocrystal and a polymerizable liquid crystal compound. The present invention also provides a backlight and a display device including a polarized luminescent multilayered body according to the present invention.
    Type: Application
    Filed: December 12, 2017
    Publication date: April 15, 2021
    Applicant: DIC Corporation
    Inventors: Koichi Endou, Yasuhiro Kuwana, Hidehiko Yamaguchi, Shinji Ogawa
  • Patent number: 10927263
    Abstract: An object of the present invention is to provide a polymerizable composition with which a polymer having a high degree of hardness can be produced. Another object is to provide, for example, an optically anisotropic body, a phase retardation film, an optical compensation film, an antireflection film, a lens, and a lens sheet that are composed of the polymerizable composition and a liquid crystal display element, an organic light-emitting display element, a lighting element, an optical component, a coloring agent, a security marker, a laser emission member, a polarizing film, a coloring material, and a printed item that are produced using the polymerizable composition. The present invention provides a polymerizable composition including a polymerizable compound represented by General Formula (IA) which has a specific structure including a plurality of polymerizable groups.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: February 23, 2021
    Assignee: DIC CORPORATION
    Inventors: Kouichi Endo, Yasuhiro Kuwana, Mika Takasaki
  • Patent number: 10892418
    Abstract: To provide a charge injection layer in which the refractive index is sufficiently low and unbalance in the composition of materials is less likely to occur, and a method for its production as well as an organic photoelectronic element and a method for its production. The charge injection layer contains a fluorinated polymer and a semiconductor material, and has a refractive index in the wavelength range of from 450 to 800 nm, of at most 1.60.
    Type: Grant
    Filed: February 3, 2020
    Date of Patent: January 12, 2021
    Assignees: AGC Inc., National University Corporation Yamagata University
    Inventors: Shigeki Hattori, Takefumi Abe, Kaori Tsuruoka, Yasuhiro Kuwana, Daisuke Yokoyama
  • Patent number: 10879468
    Abstract: To provide a layer such as a charge transport layer having a refractive index significantly lowered without impairing electrical conductivity and surface roughness, and a method for producing it. A deposited film composition obtained by co-depositing a fluorinated polymer having a saturated vapor pressure at 300° C. of at least 0.001 Pa and an organic semiconductor material.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: December 29, 2020
    Assignees: National University Corporation Yamagata University, AGC Inc.
    Inventors: Daisuke Yokoyama, Takefumi Abe, Yasuhiro Kuwana
  • Publication number: 20200264461
    Abstract: An aspect of the present invention provides a light conversion film including light-emitting nanocrystalline particles configured to convert light having a predetermined wavelength into light of any of red, green, and blue and to emit the light, and a wavelength-selective transmission layer disposed on at least one side of the light conversion layer and configured to transmit light in a specific wavelength range.
    Type: Application
    Filed: September 20, 2018
    Publication date: August 20, 2020
    Applicant: DIC CORPORATION
    Inventors: Yasuhiro Kuwana, Hidetoshi Nakata, Hidehiko Yamaguchi, Takayuki Miki, Hirotomo Sasaki, Shunki Sakai
  • Publication number: 20200199452
    Abstract: A polymerizable liquid crystal composition suitable for a heat-resistant, optical film that has a small selective wavelength shift due to thermal history is disclosed. The polymerizable liquid crystal composition contains a bifunctional polymerizable liquid crystal compound represented by the following general formula (I-2), a chiral compound, and an oxime ester polymerization initiator. In formula (I-2), P121 and P122 denote a polymerizable functional group, Sp121 and Sp122 denote a C1-18 alkylene group, a single bond, or the like, X121 and X122 denote —O—, —S—, or the like, q121 and g122 denote 0 or 1, and MG122 denotes a mesogenic group represented by the general formula (I-2-b). In the general formula (I-2-b), A1, A2, and A3 denote a 1,4-phenylene group, a 1,4-cyclohexylene group, or the like, Z1 and Z2 denote —COO—, —OCO—, or the like, and r1 denotes 0, 1, 2 or 3.
    Type: Application
    Filed: May 29, 2018
    Publication date: June 25, 2020
    Applicant: DIC Corporation
    Inventors: Hidetoshi Nakata, Yasuhiro Kuwana
  • Publication number: 20200176715
    Abstract: To provide an organic photoelectronic element, of which the external quantum efficiency is improved, the power consumption is low and the service life is prolonged. The organic photoelectronic element comprises a substrate, an anode provided on the substrate, a cathode facing the anode, a light emitting layer disposed between the anode and the cathode, and a hole transport layer provided in contact with the light emitting layer between the light emitting layer and the anode, wherein the hole transport layer contains an organic semiconductor material and a fluorinated polymer, and at the surface of the hole transport layer in contact with the light emitting layer, the fluorinated polymer is present.
    Type: Application
    Filed: February 3, 2020
    Publication date: June 4, 2020
    Applicants: AGC Inc., National University Corporation Yamagata University
    Inventors: Takefumi ABE, Yasuhiro Kuwana, Shigeki Hattori, Kaori Tsuruoka, Daisuke Yokoyama
  • Publication number: 20200176678
    Abstract: To provide a charge injection layer in which the refractive index is sufficiently low and unbalance in the composition of materials is less likely to occur, and a method for its production as well as an organic photoelectronic element and a method for its production. The charge injection layer contains a fluorinated polymer and a semiconductor material, and has a refractive index in the wavelength range of from 450 to 800 nm, of at most 1.60.
    Type: Application
    Filed: February 3, 2020
    Publication date: June 4, 2020
    Applicants: AGC Inc., National University Corporation Yamagata University
    Inventors: Shigeki HATTORI, Takefumi ABE, Kaori TSURUOKA, Yasuhiro KUWANA, Daisuke YOKOYAMA
  • Publication number: 20200168829
    Abstract: To provide an organic photoelectronic element excellent in light emitting characteristics and long-term reliability. The organic photoelectronic element comprises a substrate, an anode provided on the substrate, a cathode facing the anode, a light emitting layer disposed between the anode and the cathode, a hole transport layer disposed between the light emitting layer and the anode, and an electron blocking layer provided in contact with the light emitting layer and the hole transport layer between the light emitting layer and the hole transport layer, wherein the hole transport layer contains a fluorinated polymer and an organic semiconductor material, and has a refractive index in the wavelength range of from 450 nm to 800 nm, of at most 1.
    Type: Application
    Filed: February 3, 2020
    Publication date: May 28, 2020
    Applicants: AGC Inc., National University Corporation Yamagata University
    Inventors: Shigeki HATTORI, Takefumi ABE, Kaori TSURUOKA, Yasuhiro KUWANA, Daisuke YOKOYAMA
  • Patent number: 10655066
    Abstract: The problem that the present invention is to solve is to provide an optical film that has less alignment defects and is less liable to cause variation in the optical characteristics when placed in a high temperature state. The present invention provides an optical film containing a structural unit derived from a specific compound, that is, an optical film containing a structural unit derived from a compound represented by the general formula (I), which has less alignment defects and is less liable to cause variation in the optical characteristics when placed in a high temperature state, and also provides a display device including the optical film.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: May 19, 2020
    Assignee: DIC Corporation
    Inventors: Masahiro Horiguchi, Sayaka Nose, Yasuhiro Kuwana, Kouichi Endo
  • Patent number: 10649124
    Abstract: A polymerizable composition of the present invention has favorable solubility, and an optically anisotropic body using the polymerizable composition is unlikely to discolor and is excellent in heat resistance and light resistance. The problem to be solved by the present invention is to provide a polymer obtained by polymerizing the polymerizable composition and an optically anisotropic body using the polymer. The present invention relates to a polymerizable composition which includes a compound having at least one mesogenic group and satisfying an expression represented by Expression (1), and which satisfies an expression represented by Expression (2). 0.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: May 12, 2020
    Assignee: DIC CORPORATION
    Inventors: Mika Takasaki, Masahiro Horiguchi, Yasuhiro Kuwana
  • Patent number: 10611869
    Abstract: Disclosed herein is a curable composition containing a monomer (A) having at least one crosslinkable group and at least one aromatic ring, a monomer (B) having a fluorene skeleton, a compound (C) having an Abbe number of at most 21, and a polymerization initiator (D), wherein the content of the compound (C) is from 1 to 10 mass % based on 100 mass % of the total content of the monomer (A), the monomer (B) and the compound (C). Curable compositions of this disclosure have low viscosities and produce cured products having a high refractive indices, a low Abbe numbers, high transparencies and high heat resistances.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: April 7, 2020
    Assignee: AGC Inc.
    Inventors: Tomoaki Sakurada, Keisuke Takagi, Yasuhiro Kuwana
  • Patent number: 10608183
    Abstract: To provide a charge transport layer excellent in the external quantum efficiency, and an organic photoelectronic element comprising the charge transport layer. A charge transport layer comprising a film containing a fluorinated polymer and a semiconductor material, wherein the film has a material composition such that ?Eth is within a range of from 0.010 to 0.080 MV/cm. An organic photoelectronic element comprising the charge transport layer.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: March 31, 2020
    Assignees: AGC Inc., National University Corporation Yamagata University
    Inventors: Takefumi Abe, Yasuhiro Kuwana, Shigeki Hattori, Kaori Tsuruoka, Daisuke Yokoyama
  • Publication number: 20190382655
    Abstract: “Object” A problem to be solved by the present invention is to provide a luminescent nanocrystal complex that tends to disperse orderly in a polymer matrix and is superior in dispersibility in structurally mesogenic crosslinkable polymer matrices. “Solution” The present invention is a luminescent nanocrystal complex that contains luminescent nanocrystals and a surface-modifying compound that modifies the surface of the luminescent nanocrystals. The surface-modifying compound has a mesogenic backbone and a group that binds to the surface of the luminescent nanocrystals.
    Type: Application
    Filed: December 7, 2017
    Publication date: December 19, 2019
    Applicant: DIC Corporation
    Inventors: Yasuhiro Kuwana, Koichi Endou, Kazuaki Hatsusaka, Yoshio Aoki, Hidehiko Yamaguchi
  • Patent number: 10479844
    Abstract: The present invention provides a polymerizable composition containing a specific polymerizable compound and a fluorosurfactant having a specific polyoxyalkylene skeleton and having specific molecular weight. The invention also provides an optically anisotropic body, a retardation film, an antireflective film, and a liquid crystal display device that are produced using the polymerizable composition of the present invention. The present invention is useful because, when an optically anisotropic body is produced by photo-polymerization of the polymerizable composition, three features including the leveling properties of the surface of the optically anisotropic body, offset onto the substrate, and liquid crystal alignment can be improved simultaneously.
    Type: Grant
    Filed: January 16, 2019
    Date of Patent: November 19, 2019
    Assignee: DIC CORPORATION
    Inventors: Kouichi Endo, Toru Ishii, Yasuhiro Kuwana, Kazuaki Hatsusaka, Mika Yamamoto
  • Patent number: 10473820
    Abstract: There is provided a compound containing a mesogenic group, which includes a silicon compound at a low concentration, a polymerizable compound containing the mesogenic group, a mixture and a composition using these compounds, a polymerizable mixture having the polymerizable compound, and a polymer, an optically anisotropic body, and a phase difference film using the polymerizable composition. It is possible to obtain the optically anisotropic body and the phase difference film having satisfactory scratch resistance and adhesion, by using the polymerizable composition composed of the compound containing a mesogenic group, which includes a silicon compound at a low concentration.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: November 12, 2019
    Assignee: DIC CORPORATION
    Inventors: Mika Yamamoto, Yasuhiro Kuwana, Hidetoshi Nakata, Koichi Endou, Kunihiko Kotani, Hiroshi Hasebe, Yoshiyuki Ono
  • Publication number: 20190312202
    Abstract: To provide a composition having a very low refractive index, an organic photoelectronic element using the composition, and simple methods for producing such a composition and an organic photoelectronic element. A composition comprising a fluorinated polymer, an organic semiconductor material and a dopant.
    Type: Application
    Filed: June 24, 2019
    Publication date: October 10, 2019
    Applicants: NATIONAL UNIVERSITY CORPORATION YAMAGATA UNIVERSITY, AGC Inc.
    Inventors: Daisuke YOKOYAMA, Takefumi ABE, Yasuhiro KUWANA
  • Publication number: 20190305226
    Abstract: To provide a layer such as a charge transport layer having a refractive index significantly lowered without impairing electrical conductivity and surface roughness, and a method for producing it. A deposited film composition obtained by co-depositing a fluorinated polymer having a saturated vapor pressure at 300° C. of at least 0.001 Pa and an organic semiconductor material.
    Type: Application
    Filed: June 4, 2019
    Publication date: October 3, 2019
    Applicants: National University Corporation Yamagata University, AGC Inc.
    Inventors: Daisuke YOKOYAMA, Takefumi ABE, Yasuhiro KUWANA
  • Publication number: 20190288205
    Abstract: To provide a charge transport layer excellent in the external quantum efficiency, and an organic photoelectronic element comprising the charge transport layer. A charge transport layer comprising a film containing a fluorinated polymer and a semiconductor material, wherein the film has a material composition such that ?Eth is within a range of from 0.010 to 0.080 MV/cm. An organic photoelectronic element comprising the charge transport layer.
    Type: Application
    Filed: June 4, 2019
    Publication date: September 19, 2019
    Applicants: AGC Inc., National University Corporation Yamagata University
    Inventors: Takefumi ABE, Yasuhiro Kuwana, Shigeki Hattori, Kaori Tsuruoka, Daisuke Yokoyama
  • Publication number: 20190264034
    Abstract: An object of the present invention is to provide a polymerizable composition with which a polymer having a high degree of hardness can be produced. Another object is to provide, for example, an optically anisotropic body, a phase retardation film, an optical compensation film, an antireflection film, a lens, and a lens sheet that are composed of the polymerizable composition and a liquid crystal display element, an organic light-emitting display element, a lighting element, an optical component, a coloring agent, a security marker, a laser emission member, a polarizing film, a coloring material, and a printed item that are produced using the polymerizable composition. The present invention provides a polymerizable composition including a polymerizable compound represented by General Formula (IA) which has a specific structure including a plurality of polymerizable groups.
    Type: Application
    Filed: July 13, 2017
    Publication date: August 29, 2019
    Applicant: DIC Corporation
    Inventors: Kouichi Endo, Yasuhiro Kuwana, Mika Takasaki