Laminated film, and display device including same

Patent metadata

Field	Value
Publication number	US-11945199-B2
Application number	US-202318162801-A
Country	US
Kind code	B2
Filing date	Feb 1, 2023
Priority date	Oct 8, 2018
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

Disclosed are a laminated film including a light transmitting substrate; a hard coating layer; and an optical enhancement layer disposed between the light transmitting substrate and the hard coating layer or at a position facing the hard coating layer with the light transmitting substrate therebetween, wherein the light transmitting substrate includes a polyimide, a poly(amide-imide) copolymer, or a combination thereof, and the optical enhancement layer includes a copolymer comprising a polyimide, and a display device including the laminated film.

First claim

What is claimed is:

1. A laminated film comprising
a light transmitting substrate;
a hard coating layer; and
an optical enhancement layer disposed between the light transmitting substrate and the hard coating layer or at a position facing the hard coating layer with the light transmitting substrate therebetween,
wherein the light transmitting substrate comprises a polyimide, a poly(amide-imide) copolymer, or a combination thereof, and
the optical enhancement layer comprises a copolymer comprising a polyimide, wherein the copolymer comprising the polyimide comprises (a) an imide structural unit, and (b) a urethane structural unit, a siloxane structural unit, or a combination thereof, and
wherein a refractive index of the optical enhancement layer has a value between a refractive index of the light transmitting substrate and a refractive index of the hard coating layer.

2. The laminated film of claim 1 , wherein the light transmitting substrate has a thickness of about 30 μm to about 200 μm and the optical enhancement layer has a thickness of about 0.1 μm to about 8 μm.

3. The laminated film of claim 1 , wherein the refractive index of the optical enhancement layer is about 1.5 to about 1.7.

4. The laminated film of claim 1 , wherein the copolymer comprising the polyimide of the optical enhancement layer further comprises an amide structural unit.

5. The laminated film of claim 1 , wherein the imide structural unit is represented by Chemical Formula 1:

wherein, in Chemical Formula 1,
D comprises a substituted or unsubstituted quadrivalent C4 to C30 alicyclic organic group, a substituted or unsubstituted quadrivalent C6 to C30 aromatic organic group, a substituted or unsubstituted quadrivalent C4 to C30 heteroaromatic organic group, or a combination thereof, and
the alicyclic organic group, the aromatic organic group, the heteroaromatic organic group, or the combination thereof is a single ring, a condensed ring in which at least two rings are fused, or a ring system that comprises at least two ring groups, each of the at least two ring groups comprises the single ring or the condensed ring, wherein the at least two ring groups are linked by a single bond, a fluorenylene group, —O—, —S—, —C(═O)—, —CH(OH)—, —S(═O) 2 —, —Si(CH 3 ) 2 —, —(CH 2 ) p —, —(CF 2 ) q —, —C(C n H 2n+1 ) 2 —, —C(C n F 2n+1 ) 2 —, —(CH 2 ) p —C(C n H 2n+1 ) 2 —(CH 2 ) q —, —(CH 2 ) p —C(C n F 2n+1 ) 2 —(CH 2 ) q —, wherein, 1≤n≤10, 1≤p≤10 and 1≤q≤10, —C(CF 3 )(C 6 H 5 )—, —C(═O)NH—, or a combination thereof.

6. The laminated film of claim 1 , wherein the urethane structural unit is represented by Chemical Formula 2:
*—(—Y—NH—CO—O—Z—)—*  (Chemical Formula 2)

wherein, in Chemical Formula 2,
Y and Z are each independently a substituted or unsubstituted divalent C1 to C30 aliphatic organic group, a substituted or unsubstituted divalent C3 to C30 alicyclic organic group, a substituted or unsubstituted C6 to C30 aromatic organic group, a substituted or unsubstituted C2 to C30 heteroaromatic organic group, or a combination thereof, and
the alicyclic organic group, the aromatic organic group, the heteroaromatic organic group, or the combination thereof is a single ring, a condensed ring in which at least two rings are fused, or a ring system that comprises at least two ring groups, each of the at least two ring groups comprises the single ring or the condensed ring, wherein the at least two ring groups are linked by a single bond, a fluorenylene group, —O—, —S—, —C(═O)—, —CH(OH)—, —S(═O) 2 —, —Si(CH 3 ) 2 —, —(CH 2 ) p —, —(CF 2 ) q —, —C(C n H 2n+1 ) 2 —, —C(C n F 2n+1 ) 2 —, —(CH 2 ) p —C(C n H 2n+1 ) 2 —(CH 2 ) q —, —(CH 2 ) p —C(C n F 2n+1 ) 2 —(CH 2 ) q —, wherein 1≤n≤10, 1≤p≤10 and 1≤q≤10, —C(CF 3 )(C 6 H 5 )—, —C(═O)NH—, or a combination thereof.

7. The laminated film of claim 1 , wherein the siloxane structural unit is represented by Chemical Formula 3:

wherein, in Chemical Formula 3,
R a to R f are each independently a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C2 to C30 alkenyl group, a substituted or unsubstituted C2 to C30 alkynyl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C3 to C30 cycloalkyl group, a substituted or unsubstituted C6 to C30 aryl group, an epoxide-containing group, or a combination thereof,
L 1 and L 2 are each independently a single bond, —O—, a substituted or unsubstituted C1 to C30 alkylene group, a substituted or unsubstituted C1 to C30 heteroalkylene group, a substituted or unsubstituted C2 to C30 alkenylene group, a substituted or unsubstituted C3 to C30 cycloalkylene group, a substituted or unsubstituted C2 to C30 heterocycloalkylene group, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted C2 to C30 heteroarylene group, or a combination thereof, and
m is an integer from 0 to 150.

8. The laminated film of claim 4 , wherein the amide structural unit is represented by Chemical Formula 4:

wherein, in Chemical Formula 4,
A, E 1 , and E 2 are each independently a substituted or unsubstituted divalent C1 to C30 aliphatic organic group, a substituted or unsubstituted divalent C3 to C30 alicyclic organic group, a substituted or unsubstituted divalent C6 to C30 aromatic organic group, a substituted or unsubstituted divalent C2 to C30 heteroaromatic organic group, or a combination thereof, and
the alicyclic organic group, aromatic organic group, heteroaromatic organic group, or the combination thereof is a single ring, a condensed ring in which at least two rings are fused, or a ring system that comprises at least two ring groups, each of the at least two ring groups comprises the single ring or the condensed ring, wherein the at least two rings are linked by a single bond, a fluorenylene group, —O—, —S—, —C(═O)—, —CH(OH)—, —S(═O) 2 —, —(CH 2 ) p —, —(CF 2 ) q —, —C(C n H 2n+1 ) 2 —, —C(C n F 2n+1 ) 2 —, —(CH 2 ) p —C(C n H 2n+1 ) 2 —(CH 2 ) q —, —(CH 2 ) p —C(C n F 2n+1 ) 2 —(CH 2 ) q —, wherein 1≤n≤10, 1≤p≤10 and 1≤q≤10, —C(CF 3 )(C 6 H 5 )—, —C(═O)NH—, or a combination thereof.

9. The laminated film of claim 1 , wherein the optical enhancement layer further comprises a partially condensed polyhedral oligomer silsesquioxane comprising a functional group capable of forming a hydrogen bond at a broken site of at least one —Si—O—Si— bond.

10. The laminated film of claim 9 , wherein the partially condensed polyhedral oligomer silsesquioxane is represented by Chemical Formula 5 or Chemical Formula 6:

wherein, in Chemical Formula 5 and Chemical Formula 6,
R is each independently a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C3 to C30 cycloalkyl group, a substituted or unsubstituted C6 to C30 aryl group, or a combination thereof, and
R′ is each independently —OH, —SH, or —NH 2 .

11. The laminated film of claim 9 , wherein the partially condensed polyhedral oligomer silsesquioxane is present in an amount of less than or equal to about 20 parts by mass based on 100 parts by mass of the copolymer comprising the polyimide in the optical enhancement layer.

12. The laminated film of claim 1 , wherein the ha

Assignees

• Samsung Electronics Co Ltd
• Samsung Sdi Co Ltd

Inventors

• Jeon Hyunjeong
• Jo A Ra
• Chae Jungha
• Song Sun Jin
• Jeong Boreum

Classifications

• B32B27/08 Primary

  of synthetic resin · CPC title

• B32B27/281

  comprising polyimides · CPC title

• B32B2250/03

  3 layers · CPC title

• B32B2255/10

  on synthetic resin layer or on natural or synthetic rubber layer · CPC title

• B32B2255/26

  Polymeric coating · CPC title