US 12,078,890 B2
Barrier film, and wavelength conversion sheet, back light, and liquid crystal display device which use same
Tatsuji Nakajima, Abiko (JP); Ryutaro Harada, Tokyo (JP); Takeshi Sakamoto, Fujimino (JP); Shuichi Tamura, Misato (JP); Akihito Haruki, Saitama (JP); Shota Yamanishi, Nagareyama (JP); and Ryoma Yasui, Nagareyama (JP)
Assigned to DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
Appl. No. 18/041,649
Filed by DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
PCT Filed Aug. 3, 2021, PCT No. PCT/JP2021/028683
§ 371(c)(1), (2) Date Feb. 14, 2023,
PCT Pub. No. WO2022/039013, PCT Pub. Date Feb. 24, 2022.
Claims priority of application No. 2020-138756 (JP), filed on Aug. 19, 2020.
Prior Publication US 2023/0305335 A1, Sep. 28, 2023
Int. Cl. G02F 1/1335 (2006.01); F21V 8/00 (2006.01); G02F 1/13357 (2006.01)
CPC G02F 1/133614 (2021.01) [G02B 6/005 (2013.01); G02F 1/133606 (2013.01); G02F 2202/36 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A barrier film for a wavelength conversion sheet, comprising an inorganic oxide layer A, an organic coating layer B, an inorganic oxide layer C, and a primer layer D in presented order on a light-transmitting base material, wherein
the organic coating layer B comprises polyvinyl alcohol,
the primer layer D comprises a polyurethane-based resin composition, and
thicknesses of the light-transmitting base material, the inorganic oxide layer A, the organic coating layer B, the inorganic oxide layer C, and the primer layer D are defined as t0, tA, tB, tC, and tD, respectively;
tB is 150 nm or more and 500 nm or less; and
tD/tB is 0.55 or more and 1.65 or less.