Patents by Inventor Hiroki ICHIBA

Hiroki ICHIBA 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).

  • Phosphor protection film, wavelength conversion sheet, and light-emitting unit
    Patent number: 11561328
    Abstract: A phosphor protection film for protecting phosphors contained in a phosphor layer. The phosphor protection film includes a functional layer, a bulking layer that has a single-layer structure or a laminated structure, and a first vapor deposited layer (gas barrier layer) that has gas barrier properties in this order from outside to inside. The clearance between the functional layer and the first vapor deposited layer in the thickness direction of the phosphor protection film is 45 to 280 ?m.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: January 24, 2023
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventors: Hiroki Ichiba, Kei Tsuruzoe
  • Optical film, and optical barrier film, color conversion film and backlight unit using the optical film
    Patent number: 11397287
    Abstract: An optical film including a first film substrate and a coating layer formed on the first film substrate. The coating layer of this optical film contains a binder resin and fine particles with an average size of 0.5 ?m or more and 10.0 ?m or less and a standard deviation in size that is less than ½ of the average size.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: July 26, 2022
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventors: Hiroki Ichiba, Masato Kurokawa, Koji Murata, Kengo Ozono
  • PHOSPHOR PROTECTIVE FILM, WAVELENGTH CONVERSION SHEET WITH RELEASE FILM, WAVELENGTH CONVERSION SHEET, AND PRODUCTION METHOD FOR WAVELENGTH CONVERSION SHEET
    Publication number: 20210249568
    Abstract: A production method for a wavelength conversion sheet, including: a bonding step of bonding a multilayer film and a release film together to obtain a phosphor protective film, the multilayer film including a barrier film, the release film being releasable from the multilayer film; a phosphor layer formation step of forming a phosphor layer containing phosphors on a surface of the multilayer film of the phosphor protective film to obtain a wavelength conversion sheet with the release film; and a release step of releasing the release film from the wavelength conversion sheet with the release film.
    Type: Application
    Filed: April 23, 2021
    Publication date: August 12, 2021
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Hiroki ICHIBA, Satoshi MARUYAMA, Masato KUROKAWA, Yasuhiko SAITO
  • OPTICAL FILM, AND OPTICAL BARRIER FILM, COLOR CONVERSION FILM AND BACKLIGHT UNIT USING THE OPTICAL FILM
    Publication number: 20190285776
    Abstract: An optical film including a first film substrate and a coating layer formed on the first film substrate. The coating layer of this optical film contains a binder resin and fine particles with an average size of 0.5 ?m or more and 10.0 ?m or less and a standard deviation in size that is less than ½ of the average size.
    Type: Application
    Filed: May 31, 2019
    Publication date: September 19, 2019
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Hiroki ICHIBA, Masato KUROKAWA, Koji MURATA, Kengo OZONO
  • PHOSPHOR PROTECTION FILM, WAVELENGTH CONVERSION SHEET, AND LIGHT-EMITTING UNIT
    Publication number: 20190187338
    Abstract: A phosphor protection film for protecting phosphors contained in a phosphor layer. The phosphor protection film includes a functional layer, a bulking layer that has a single-layer structure or a laminated structure, and a first vapor deposited layer (gas barrier layer) that has gas barrier properties in this order from outside to inside. The clearance between the functional layer and the first vapor deposited layer in the thickness direction of the phosphor protection film is 45 to 280 ?m.
    Type: Application
    Filed: February 7, 2019
    Publication date: June 20, 2019
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Hiroki ICHIBA, Kei TSURUZOE