Patents by Inventor Kenichiro Nakamatsu

Kenichiro Nakamatsu 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: 11707911
    Abstract: The present invention provides a method for producing an optical film excellent in anti-fouling properties and scratch resistance as well as anti-reflection properties. The method includes the steps of: (1) applying a lower layer resin and an upper layer resin; (2) forming a resin layer having the uneven structure on a surface thereof by pressing a mold against the lower layer resin and the upper layer resin from the upper layer resin side in the state where the applied lower layer resin and upper layer resin are stacked; and (3) curing the resin layer, the lower layer resin containing at least one kind of first monomer that contains no fluorine atoms, the upper layer resin containing a fluorine-containing monomer and at least one kind of second monomer that contains no fluorine atoms, at least one of the first monomer and the second monomer containing a compatible monomer that is compatible with the fluorine-containing monomer and being dissolved in the lower layer resin and the upper layer resin.
    Type: Grant
    Filed: January 6, 2022
    Date of Patent: July 25, 2023
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hidekazu Hayashi, Tokio Taguchi, Atsushi Niinoh, Kenichiro Nakamatsu, Yasuhiro Shibai
  • Publication number: 20220126542
    Abstract: The present invention provides a method for producing an optical film excellent in anti-fouling properties and scratch resistance as well as anti-reflection properties. The method includes the steps of: (1) applying a lower layer resin and an upper layer resin; (2) forming a resin layer having the uneven structure on a surface thereof by pressing a mold against the lower layer resin and the upper layer resin from the upper layer resin side in the state where the applied lower layer resin and upper layer resin are stacked; and (3) curing the resin layer, the lower layer resin containing at least one kind of first monomer that contains no fluorine atoms, the upper layer resin containing a fluorine-containing monomer and at least one kind of second monomer that contains no fluorine atoms, at least one of the first monomer and the second monomer containing a compatible monomer that is compatible with the fluorine-containing monomer and being dissolved in the lower layer resin and the upper layer resin.
    Type: Application
    Filed: January 6, 2022
    Publication date: April 28, 2022
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Hidekazu HAYASHI, Tokio TAGUCHI, Atsushi NIINOH, Kenichiro NAKAMATSU, Yasuhiro SHIBAI
  • Patent number: 11230074
    Abstract: The present invention provides a method for producing an optical film excellent in anti-fouling properties and scratch resistance as well as anti-reflection properties. The method includes the steps of: (1) applying a lower layer resin and an upper layer resin; (2) forming a resin layer having the uneven structure on a surface thereof by pressing a mold against the lower layer resin and the upper layer resin from the upper layer resin side in the state where the applied lower layer resin and upper layer resin are stacked; and (3) curing the resin layer, the lower layer resin containing at least one kind of first monomer that contains no fluorine atoms, the upper layer resin containing a fluorine-containing monomer and at least one kind of second monomer that contains no fluorine atoms, at least one of the first monomer and the second monomer containing a compatible monomer that is compatible with the fluorine-containing monomer and being dissolved in the lower layer resin and the upper layer resin.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: January 25, 2022
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hidekazu Hayashi, Tokio Taguchi, Atsushi Niinoh, Kenichiro Nakamatsu
  • Patent number: 11142653
    Abstract: The present invention provides a method for producing an antifouling film having excellent antifouling properties and rubbing resistance. The method for producing an antifouling film of the present invention includes Process (1) of applying a resin to a surface of a substrate; Process (2) of pushing the substrate to a die with the resin in between to form an uneven structure on a surface of the resin; and Process (3) of curing the resin including the uneven structure on the surface thereof to form a polymer layer. The resin contains an antifouling agent that contains a compound containing a perfluoro(poly)ether group. The die includes a surface having undergone release treatment using a release agent containing a compound that contains a perfluoro(poly)ether group, a hydrolyzable group, and a Si atom.
    Type: Grant
    Filed: July 3, 2017
    Date of Patent: October 12, 2021
    Assignees: SHARP KABUSHIKI KAISHA, DAIKIN INDUSTRIES, LTD.
    Inventors: Hidekazu Hayashi, Tokio Taguchi, Kenichiro Nakamatsu, Yasuhiro Shibai, Ken Atsumo, Tsuneo Yamashita, Saya Nii, Eiji Sakamoto, Kakeru Hanabusa, Hisashi Mitsuhashi, Takayuki Araki
  • Patent number: 11142617
    Abstract: The present invention provides a method for producing an antifouling film capable of long-term continuous production of an antifouling film having excellent antifouling properties. The method for producing an antifouling film of the present invention includes Process (1) of applying a resin to a surface of a substrate; Process (2) of applying a second release agent to a surface of a die coated with a first release agent; Process (3) of pushing the substrate to the surface of the die coated with the second release agent with the resin in between to form an uneven structure on a surface of the resin; and Process (4) of curing the resin including the uneven structure on the surface thereof to form a polymer layer. The resin contains an antifouling agent that contains a predetermined compound. The first release agent contains a predetermined compound. The second release agent contains a predetermined compound.
    Type: Grant
    Filed: July 3, 2017
    Date of Patent: October 12, 2021
    Assignees: SHARP KABUSHIKI KAISHA, DAIKIN INDUSTRIES, LTD.
    Inventors: Hidekazu Hayashi, Tokio Taguchi, Kenichiro Nakamatsu, Yasuhiro Shibai, Ken Atsumo, Tsuneo Yamashita, Eiji Sakamoto, Saya Nii, Takayuki Araki
  • Patent number: 10981352
    Abstract: The method for producing an optical member of the present invention includes: Process (1) of applying a first resin to a substrate; Process (2) of applying a second resin to at least one of the first resin and a die; Process (3) of pushing the substrate to the die with the first resin and the second resin in between to form a resin layer including on a surface thereof an uneven structure; and Process (4) of curing the resin layer to provide a polymer layer. The die includes a surface after release treatment with a fluorine release agent. The first resin contains a resin component, and the resin component contains predetermined amounts of a (meth)acrylamide compound and a urethane prepolymer containing six or more functional groups. The second resin contains predetermined amounts of a reactive group-containing monomer, a fluorosurfactant, and a fluorine-containing monomer.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: April 20, 2021
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hidekazu Hayashi, Tokio Taguchi, Kenichiro Nakamatsu, Hisashi Maruyama, Nobuaki Nakao, Suguru Aoki
  • Patent number: 10976475
    Abstract: The antifouling film includes a substrate, and a polymer layer disposed on a surface of the substrate and including on a surface thereof an uneven structure provided with multiple projections at a pitch not longer than a wavelength of visible light. The polymer layer is a cured product of a polymerizable composition, the polymerizable composition containing, in terms of active constituents, 15 to 40 wt % of an urethane acrylate containing six or more functional groups, 35 to 60 wt % of a multifunctional acrylate containing four or more functional groups and 3 to 15 ethylene oxide groups for each functional group, 15 to 30 wt % of a monofunctional acrylate with no ethylene oxide group, 0.5 to 10 wt % of a fluorine release agent containing a perfluoropolyether group and having a fluorine atom concentration of 50 wt % or lower, and 0.5 to 5 wt % of a polymerization initiator.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: April 13, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yasuhiro Shibai, Ken Atsumo, Kenichiro Nakamatsu
  • Patent number: 10967663
    Abstract: A printing intaglio (100A), (100B) is a printing intaglio for use in intaglio printing, the printing intaglio having a surface which has a plurality of first recessed portions (12) that form a pattern to be printed, wherein at least one of the plurality of first recessed portions has a plurality of minute recessed portions (16p) inside the first recessed portion, and when viewed in a direction normal to the surface of the printing intaglio, a two-dimensional size of the plurality of minute recessed portions is not less than 10 nm and less than 500 nm.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: April 6, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Nobuaki Yamada, Kenichiro Nakamatsu, Hidekazu Hayashi
  • Publication number: 20210096282
    Abstract: The antifouling film includes a substrate, and a polymer layer disposed on a surface of the substrate and including on a surface thereof an uneven structure provided with multiple projections at a pitch not longer than a wavelength of visible light. The polymer layer is a cured product of a polymerizable composition, the polymerizable composition containing, in terms of active constituents, 15 to 40 wt % of an urethane acrylate containing six or more functional groups, 35 to 60 wt % of a multifunctional acrylate containing four or more functional groups and 3 to 15 ethylene oxide groups for each functional group, 15 to 30 wt % of a monofunctional acrylate with no ethylene oxide group, 0.5 to 10 wt % of a fluorine release agent containing a perfluoropolyether group and having a fluorine atom concentration of 50 wt % or lower, and 0.5 to 5 wt % of a polymerization initiator.
    Type: Application
    Filed: June 28, 2017
    Publication date: April 1, 2021
    Inventors: YASUHIRO SHIBAI, KEN ATSUMO, KENICHIRO NAKAMATSU
  • Patent number: 10926510
    Abstract: The present invention provides an antifouling film that is excellent in antifouling properties, adhesion, rubbing resistance, and reliability, and reduces fingerprint emergence at high humidity. The antifouling film includes a substrate; and a polymer layer disposed on a surface of the substrate and including on a surface thereof an uneven structure provided with projections at a pitch not longer than a wavelength of visible light, the polymer layer being a cured product of a polymerizable composition, the polymerizable composition containing, in terms of active components, 20 to 90 wt % of a polyfunctional acrylate containing an ethylene oxide group, 5 to 25 wt % of a monofunctional amide monomer, and 0.5 to 10 wt % of a fluorine-based release agent, the polymerizable composition containing, in terms of active components, a total of 40 to 65 wt % of the ethylene oxide group in the polyfunctional acrylate and the monofunctional amide monomer.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: February 23, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yasuhiro Shibai, Ken Atsumo, Kenichiro Nakamatsu
  • Patent number: 10913862
    Abstract: The present invention provides an antifouling film that is excellent in antifouling properties, rubbing resistance, and adhesion. The antifouling film includes: a substrate; and a polymer layer disposed on a surface of the substrate and including on a surface thereof an uneven structure provided with projections at a pitch not longer than a wavelength of visible light, the polymer layer being a cured product of a polymerizable composition, the polymerizable composition containing, in terms of active components, 30 to 80 wt % of a polyfunctional acrylate, 10 to 30 wt % of a monofunctional amide monomer, 0.5 to 10 wt % of a fluorine-based release agent, and 5 to 30 wt % of a vinyl-based polymer containing a repeat unit represented by a predetermined formula.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: February 9, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yasuhiro Shibai, Ken Atsumo, Kenichiro Nakamatsu
  • Publication number: 20200341169
    Abstract: A self-adhesive sheet has a first surface and a second surface which is opposite to the first surface. The first surface includes a plurality of raised portions, a two-dimensional size of the plurality of raised portions being in a range of more than 20 nm and less than 500 nm as viewed from a normal direction of the first surface. The self-adhesive sheet is made of a silicone elastomer having a polydimethyl siloxane backbone, and has a Shore A hardness of not less than 40 and not more than 80. The second surface is capable of pressure-sensitive adhesion.
    Type: Application
    Filed: April 13, 2020
    Publication date: October 29, 2020
    Inventor: Kenichiro NAKAMATSU
  • Patent number: 10800868
    Abstract: An antifouling film includes: a substrate; and a polymer layer disposed on a surface of the substrate and including on a surface thereof an uneven structure provided with projections at a pitch not longer than a wavelength of visible light. The polymer layer is a cured product of a polymerizable composition. The polymerizable composition contains, in terms of active components, 75 to 95 wt % of a polymerizable monomer, 2.5 to 12.5 wt % of a urethane acrylate containing fluorine and an ester, and 2.5 to 9 wt % of a perfluoroalkyl-based monomer containing one (meth)acryloyl group for each molecule. The polymerizable monomer contains a bifunctional acrylate that contains an ethylene oxide group and a multifunctional acrylate that contains no ethylene oxide group. The perfluoroalkyl-based monomer has a fluorine atom concentration of 50 to 60 wt %. The polymerizable composition has an ethylene oxide group concentration of 20 to 50 wt %.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: October 13, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yasuhiro Shibai, Tokio Taguchi, Kenichiro Nakamatsu
  • Publication number: 20200290330
    Abstract: The present invention provides a super water-repellent film having high transparency, super water repellency, and antistatic properties. The super water-repellent film includes a polymer layer including, on a surface of the polymer layer, a projection/recess structure in which projections are provided at a pitch equal to or smaller than a wavelength of visible light; and a transparent conductive particle disposed in a recess provided between the projections. The polymer layer is a cured product of a polymerizable composition containing a polyfunctional acrylate, a monofunctional acrylate, and a fluorine-containing release agent containing a perfluoropolyether group. The transparent conductive particle is disposed at a position in the recess deeper than tips of the projections. The tips are exposed on an outermost surface of the super water-repellent film.
    Type: Application
    Filed: February 27, 2020
    Publication date: September 17, 2020
    Inventor: Kenichiro NAKAMATSU
  • Patent number: 10763068
    Abstract: An electron emitting device (100) includes a first electrode (12), a second electrode (52), and a semi-conductive layer (30) provided between the first electrode (12) and the second electrode (52). The semi-conductive layer (30) includes a porous alumina layer (32) having a plurality of pores (34) and silver (42) supported in the plurality of pores (34) of the porous alumina layer (32).
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: September 1, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Hidekazu Hayashi, Tokio Taguchi, Kenichiro Nakamatsu, Tadashi Iwamatsu, Kohji Shinkawa, Mai Takasaki, Toshihiro Kaneko, Atsushi Niinoh
  • Patent number: 10692680
    Abstract: A method of producing an electron emitting device includes: step A of providing an aluminum substrate or providing an aluminum layer supported by a substrate; step B of anodizing a surface of the aluminum substrate or a surface of the aluminum layer to form a porous alumina layer having a plurality of pores; step C of applying Ag nanoparticles in the plurality of pores to allow the Ag nanoparticles to be supported in the plurality of pores; step D of, after step C, applying a dielectric layer-forming solution onto substantially the entire surface of the aluminum substrate or the aluminum layer, the dielectric layer-forming solution containing, in an amount of not less than 7 mass % but less than 20 mass %, a polymerization product having siloxane bonds; step E of, after step D, at least reducing a solvent contained in the dielectric layer-forming solution to form the dielectric layer; and step F of forming an electrode on the dielectric layer.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: June 23, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kenichiro Nakamatsu, Tokio Taguchi, Kohji Shinkawa, Mai Takasaki, Tadashi Iwamatsu
  • Publication number: 20200165369
    Abstract: An antifouling film includes: a substrate; and a polymer layer disposed on a surface of the substrate and including on a surface thereof an uneven structure provided with projections at a pitch not longer than a wavelength of visible light. The polymer layer is a cured product of a polymerizable composition. The polymerizable composition contains, in terms of active components, 75 to 95 wt % of a polymerizable monomer, 2.5 to 12.5 wt % of a urethane acrylate containing fluorine and an ester, and 2.5 to 9 wt % of a perfluoroalkyl-based monomer containing one (meth)acryloyl group for each molecule. The polymerizable monomer contains a bifunctional acrylate that contains an ethylene oxide group and a multifunctional acrylate that contains no ethylene oxide group. The perfluoroalkyl-based monomer has a fluorine atom concentration of 50 to 60 wt %. The polymerizable composition has an ethylene oxide group concentration of 20 to 50 wt %.
    Type: Application
    Filed: November 21, 2019
    Publication date: May 28, 2020
    Inventors: Yasuhiro SHIBAI, Tokio TAGUCHI, Kenichiro NAKAMATSU
  • Patent number: 10643815
    Abstract: Provided are an electron emission device having a novel structure and being capable of improving characteristics and/or extending a lifetime of a related-art electron emission device, and a method of manufacturing the electron emission device.
    Type: Grant
    Filed: September 11, 2018
    Date of Patent: May 5, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kenichiro Nakamatsu, Hidekazu Hayashi, Tokio Taguchi, Tadashi Iwamatsu, Kohji Shinkawa, Mai Takasaki, Toshihiro Kaneko, Atsushi Niinoh
  • Patent number: 10585213
    Abstract: The present invention provides an optical element which prevents a contaminant component adhering to the edge thereof from spreading through the capillary action and thus from forming a stain; and a display device including the element. The present invention directs to an optical element including: a base material including a front surface provided with projected portions at a pitch equal to or shorter than the wavelength of visible light, and a side surface surrounding the front surface; and a covering material covering at least one of an edge of the front surface and the side surface, the covering material filling gaps between the projected portions. The present invention also directs to a display device including such an optical element.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: March 10, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Kenichiro Nakamatsu
  • Publication number: 20200071560
    Abstract: The An antifouling film includes: a substrate; and a polymer layer including on a surface thereof an uneven structure provided with projections at a pitch not longer than a wavelength of visible light. The polymer layer is a cured product of a polymerizable composition. The polymerizable composition contains, in terms of active components, 75 to 98 wt % of a polyfunctional acrylate, 0.5 to 10 wt % of a fluorine-based release agent, and 1 to 14 wt % of a monofunctional amide monomer. The polymer layer has a bottom temperature at which a storage modulus E? of the polymer layer is minimum of 90° C. to 150° C. and a minimum storage modulus E? of 0.9×108 to 4.5×108 Pa in a dynamic viscoelasticity measurement within a measurement temperature range of ?50° C. to 250° C. and at a temperature increasing rate of 5° C./min and a frequency of 10 Hz.
    Type: Application
    Filed: March 14, 2018
    Publication date: March 5, 2020
    Inventors: Yasuhiro SHIBAI, Ken ATSUMO, Kenichiro NAKAMATSU