US 12,291,015 B2
Color conversion sheet and backlight unit including the same
Sang Woo Jin, Gumi-si (KR); Jun Woo Park, Gumi-si (KR); and Ji Whan Oh, Gumi-si (KR)
Assigned to TORAY ADVANCED MATERIALS KOREA INC., Gumi-si (KR)
Appl. No. 18/567,540
Filed by TORAY ADVANCED MATERIALS KOREA INC., Gumi-si (KR)
PCT Filed Jul. 24, 2023, PCT No. PCT/KR2023/010637
§ 371(c)(1), (2) Date Dec. 6, 2023,
PCT Pub. No. WO2024/039093, PCT Pub. Date Feb. 22, 2024.
Claims priority of application No. 10-2022-0103474 (KR), filed on Aug. 18, 2022.
Prior Publication US 2025/0091318 A1, Mar. 20, 2025
Int. Cl. B32B 7/02 (2019.01); B32B 19/02 (2006.01); B32B 27/08 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B32B 27/36 (2006.01); B32B 27/40 (2006.01)
CPC B32B 7/02 (2013.01) [B32B 19/02 (2013.01); B32B 27/08 (2013.01); B32B 27/30 (2013.01); B32B 27/32 (2013.01); B32B 27/36 (2013.01); B32B 27/40 (2013.01); B32B 2250/05 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A color conversion sheet comprising:
a first wavelength conversion layer in which an organic phosphor is dispersed in a resin matrix;
a first phosphor diffusion barrier layer positioned on one surface of the first wavelength conversion layer; and
an adhesive layer positioned on one surface of the first phosphor diffusion barrier layer,
wherein the first phosphor diffusion barrier layer is formed from a composition containing a solvent having a Hildebrand solubility parameter according to Equation 1 below:
|P1−S2|>2 MPa1/2  (Equation 1)
P1: Hildebrand solubility parameter of the resin matrix of the first wavelength conversion layer
S2: Hildebrand solubility parameter of the solvent included in the first phosphor diffusion barrier layer.