Patents by Inventor Hiromi Ikeshima

Hiromi Ikeshima 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: 11181676
    Abstract: A polarizing film provided on the viewing side in an image display device of the present invention, wherein the polarizing film has a polarizer and a first transparent resin layer on the viewing side of the polarizer. The polarizer contains a polyvinyl alcohol-based resin, has a thickness of 10 ?m or less, and has, on the side of the first transparent resin layer, a compatible layer which is compatible with the first transparent resin layer and which corresponds to a thickness of 2 to 10% of the thickness of the polarizer. This polarizing film can make it possible to inhibit color phase changes when displaying black, even when a thin-type polarizer is being used.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: November 23, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Tomonori Ueno, Shinya Hiraoka, Hiromi Ikeshima, Atsushi Kishi
  • Patent number: 11125924
    Abstract: The present invention is a one-side-protected polarizing film having a polarizer and a protective film provided on only one surface of the polarizer, wherein the polarizer contains a polyvinyl alcohol-based resin, has a thickness of 10 ?m or less, and is configured so that optical properties represented by a single-body transmittance T and a polarization degree P satisfy the following relationship: P>?(100.929T?42.4?1)×100 (provided that T<42.3) or P?99.9 (provided that T?42.3), a transparent layer is provided on another surface of the polarizer, and a dynamic friction coefficient of the surface on which the protective film is provided is 0.2 or less. In this one-side-protected polarizing film, it is possible to resist the occurrence of through cracks and nano-slits even when the polarizer has specific optical properties and a thickness of 10 ?m or less.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: September 21, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Tomonori Ueno, Shinya Hiraoka, Hiromi Ikeshima, Atsushi Kishi
  • Patent number: 11099311
    Abstract: The present invention is a sheet-like optical film including a release film, a first pressure-sensitive adhesive layer, a polarizing film, and a surface protective film, laminated in this order; wherein a thickness of the polarizing film is 60 ?m or less, and when a virtual center plane f is a virtual plane located at an intermediate position in total thickness of the optical film, a distance x (?m) between the virtual center plane f and the surface protective film, and a distance y (?m) between the virtual center plane f and the release film satisfy a formula x?y>?20. The sheet-like optical film of the present invention enables the release film to be easily peeled even if a thin polarizing film is used.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: August 24, 2021
    Assignee: NITTO DENKO CORPORATION
    Inventors: Atsushi Kishi, Shinya Hiraoka, Hiromi Ikeshima
  • Publication number: 20200310018
    Abstract: The present invention is a one-side-protected polarizing film having a polarizer and a protective film provided on only one surface of the polarizer, wherein the polarizer contains a polyvinyl alcohol-based resin, has a thickness of 10 ?m or less, and is configured so that optical properties represented by a single-body transmittance T and a polarization degree P satisfy the following relationship: P>?(100.929T?42.4?1)×100 (provided that T<42.3) or P?99.9 (provided that T?42.3), a transparent layer is provided on another surface of the polarizer, and a dynamic friction coefficient of the surface on which the protective film is provided is 0.2 or less. In this one-side-protected polarizing film, it is possible to resist the occurrence of through cracks and nano-slits even when the polarizer has specific optical properties and a thickness of 10 ?m or less.
    Type: Application
    Filed: March 17, 2017
    Publication date: October 1, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomonori Ueno, Shinya Hiraoka, Hiromi Ikeshima, Atsushi Kishi
  • Publication number: 20200301057
    Abstract: A polarizing film provided on the viewing side in an image display device of the present invention, wherein the polarizing film has a polarizer and a first transparent resin layer on the viewing side of the polarizer. The polarizer contains a polyvinyl alcohol-based resin, has a thickness of 10 ?m or less, and has, on the side of the first transparent resin layer, a compatible layer which is compatible with the first transparent resin layer and which corresponds to a thickness of 2 to 10% of the thickness of the polarizer. This polarizing film can make it possible to inhibit color phase changes when displaying black, even when a thin-type polarizer is being used.
    Type: Application
    Filed: March 17, 2017
    Publication date: September 24, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomonori Ueno, Shinya Hiraoka, Hiromi Ikeshima, Atsushi Kishi
  • Publication number: 20200301058
    Abstract: The present invention is a sheet-like optical film including a release film, a first pressure-sensitive adhesive layer, a polarizing film, and a surface protective film, laminated in this order; wherein a thickness of the polarizing film is 60 ?m or less, and when a virtual center plane f is a virtual plane located at an intermediate position in total thickness of the optical film, a distance x (?m) between the virtual center plane f and the surface protective film, and a distance y (?m) between the virtual center plane f and the release film satisfy a formula x?y>?20. The sheet-like optical film of the present invention enables the release film to be easily peeled even if a thin polarizing film is used.
    Type: Application
    Filed: March 28, 2017
    Publication date: September 24, 2020
    Applicant: NITTO DENKO CORPORATION
    Inventors: Atsushi Kishi, Shinya Hiraoka, Hiromi Ikeshima