BARRIER FILM FOR WAVELENGTH CONVERSION SHEET, WAVELENGTH CONVERSION SHEET, BACKLIGHT, AND LIQUID CRYSTAL DISPLAY DEVICE USING BARRIER FILM, AND METHOD FOR SELECTING BARRIER FILM FOR WAVELENGTH CONVERSION SHEET

Title:

Document Type and Number:

WIPO Patent Application WO/2022/239819

Kind Code:

A1

Abstract:

Provided is a barrier film that is for a wavelength conversion sheet and that can suppress luminance unevenness in a surface of the wavelength conversion sheet when the barrier film is applied to the wavelength conversion sheet.　The barrier film for a wavelength conversion sheet has a first base material film, a second base material film, a barrier layer, a primer layer, and an adhesive layer located between the first base material film and the second base material film, and satisfies condition 1. A surface of the barrier film on a side having the primer layer is defined as a surface 1, with the adhesive layer as a reference. The elevation of the surface 1 is measured at an interval of 1 mm, and elevation data of the surface 1 is acquired. A contour curve of the surface 1 determined by the elevation data is defined as a contour curve 1. In the contour curve 1 in a predetermined direction, at least a portion of the surface 1 has at least one projection/recess 1 having a difference of elevation of 0.001 to 0.600 mm between a crest part and a trough part adjacent to each other. When the difference of elevation of the projection/recess 1 is defined as H [mm] and the width of the projection/recess 1 is defined as W [mm], formula (1) is satisfied. (1): H/W2≤1.5×10-5.

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Inventors:

SAKAMOTO TAKESHI (JP)
TAMURA SHUICHI (JP)
HARUKI AKIHITO (JP)
HARADA RYUTARO (JP)

Application Number:

PCT/JP2022/020005

Publication Date:

November 17, 2022

Filing Date:

May 12, 2022

Export Citation:

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Assignee:

DAINIPPON PRINTING CO LTD (JP)

International Classes:

G02B5/20; B32B7/023; B32B27/40; F21S2/00; F21V9/32; G02F1/13357; F21Y115/10

Domestic Patent References:

WO2017043483A1	2017-03-16
WO2011122036A1	2011-10-06

Foreign References:

JP2020160212A	2020-10-01
JP2018109706A	2018-07-12
JP2020049836A	2020-04-02
JP2019126924A	2019-08-01
JP2001288408A	2001-10-16
JP2003026996A	2003-01-29

Attorney, Agent or Firm:

OHTANI PATENT OFFICE (JP)

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