Alignment layer composition, liquid crystal display including the same, and method of manufacturing the liquid crystal display

Patent metadata

Field	Value
Publication number	US-10072211-B2
Application number	US-201615240294-A
Country	US
Kind code	B2
Filing date	Aug 18, 2016
Priority date	Apr 20, 2016
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

An alignment layer composition including a copolymer of a dianhydride compound and a diamine compound, the copolymer including a repeating unit represented by chemical formula (1); and a repeating unit represented by chemical formula (2):

wherein R 1 is a tetravalent organic group derived from an alicyclic dianhydride or an aromatic dianhydride, and wherein R 1 includes a phenyl ester group.

First claim

What is claimed is:

1. An alignment layer composition comprising:
a copolymer of a dianhydride compound and a diamine compound, comprising:
a repeating unit represented by chemical formula (1); and
a repeating unit represented by chemical formula (2):

wherein
Z is an alkylene group comprising 2 to 8 carbon atoms,
X is an aromatic group comprising 6 to 30 carbon atoms or an alicyclic group comprising 4 to 20 carbon atoms,
Y is an alicyclic group comprising 4 to 20 carbon atoms or an aromatic group comprising 6 to 30 carbon atoms,
provided that at least one of X and Y is an alicyclic group comprising 4 to 20 carbon atoms,
n is 0 or 1, and
m is 1 or 0, provided that at least one of n and m is 1; and

wherein R 1 is a tetravalent organic group derived from an alicyclic dianhydride or an aromatic dianhydride, and wherein R 1 comprises a phenyl ester group.

2. The alignment layer composition of claim 1 , wherein in chemical formula (1),
m is 0,
n is 1, and
X is an alicyclic group comprising 4 to 20 carbon atoms.

3. The alignment layer composition of claim 1 , wherein in chemical formula (1),
each of n and m is 1,
X is an alicyclic group comprising 4 to 20 carbon atoms, and
Y is an aromatic group comprising 6 to 30 carbon atoms.

4. The alignment layer composition of claim 1 , wherein in chemical formula (1),
each of n and m is 1,
Y is an alicyclic group comprising 4 to 20 carbon atoms, and
X is an aromatic group comprising 6 to 30 carbon atoms.

5. The alignment layer composition of claim 1 , wherein the copolymer is represented by a repeating unit of chemical formula (3):

wherein Z, X, Y, n and m are identical to those in chemical formula (1).

6. The alignment layer composition of claim 1 , wherein the ratio of the diamine compound and the dianhydride compound is about 1:1.

7. A liquid crystal display comprising:
a first substrate and a second substrate facing each other;
a first alignment layer disposed on a surface of the first substrate facing the second substrate;
a second alignment layer disposed on a surface of the second substrate facing the first substrate; and
a liquid crystal layer interposed between the first substrate and the second substrate,
wherein at least one of the first alignment layer and the second alignment layer comprises a copolymer of a dianhydride compound and a diamine compound, comprising:
a repeating unit represented by chemical formula (1) and
a repeating unit represented by chemical formula (2):

wherein
Z is an alkylene group comprising 2 to 8 carbon atoms,
X is an aromatic group comprising 6 to 30 carbon atoms or an alicyclic group comprising 4 to 20 carbon atoms,
Y is an alicyclic group comprising 4 to 20 carbon atoms or an aromatic group comprising 6 to 30 carbon atoms,
provided that at least one of X and Y is an alicyclic group comprising 4 to 20 carbon atoms,
n is 0 or 1, and
m is 1 or 0, provided that at least one of n and m is 1; and

wherein R 1 is a tetravalent organic group derived from an alicyclic dianhydride or an aromatic dianhydride, wherein R 1 comprises a phenyl ester group.

8. The liquid crystal display of claim 7 , wherein the chemical formula (2) is represented by chemical formula (2-1):

wherein Ar 1 and Ar 2 are each independently an aromatic group comprising 6 to 30 carbon atoms.

9. The liquid crystal display of claim 7 , wherein the copolymer is represented by a repeating unit of chemical formula (1-1):

wherein Z, X, Y, R 1 , n and m are identical to those in chemical formula (1).

10. The liquid crystal display of claim 7 , wherein the copolymer is represented by a repeating unit of chemical formula (3-1):

wherein
Z, X, Y, n and m are identical to those in chemical formula (1), and
Ar 1 and Ar 2 are each independently an aromatic group comprising 6 to 30 carbon atoms.

11. The liquid crystal display of claim 7 , wherein the copolymer comprises a repeating unit represented by chemical formula (3):

wherein Z, X, Y, n and m are identical to those in chemical formula (1).

12. A liquid crystal display comprising:
a first substrate and a second substrate facing each other;
a first alignment layer disposed on a surface of the first substrate facing the second substrate;
a second alignment layer disposed on a surface of the second substrate facing the first substrate; and
a liquid crystal layer interposed between the first substrate and the second substrate,
wherein at least one of the first alignment layer and the second alignment layer comprises a copolymer of a dianhydride compound and a diamine compound, comprising:
a repeating unit represented by chemical formula (1) and
a repeating unit represented by chemical formula (2-2):

wherein
Z is an alkylene group comprising 2 to 8 carbon atoms,
X is an aromatic group comprising 6 to 30 carbon atoms or an alicyclic group comprising 4 to 20 carbon atoms,
Y is an alicyclic group comprising 4 to 20 carbon atoms or an aromatic group comprising 6 to 30 carbon atoms,
n is 0 or 1, and
m is 1 or 0; and

wherein Ar 1 and Ar 2 are each independently an aromatic group comprising 6 to 30 carbon atoms.

13. The liquid crystal display of claim 12 , wherein the copolymer further comprises a repeating unit of chemical formula (4-1):

wherein Z, X, Y, R 1 , Ar 1 , Ar 2 , n and m are identical to those in chemical formula (3-1).

14. The liquid crystal display of claim 13 , wherein the copolymer further comprises a repeating unit represented by chemical formula (4):

wherein Z, X, Y, n and m are identical to those in chemical formula (1).

15. The liquid crystal display of claim 13 , wherein the amount of the copolymer comprising a repeating unit of chemical formula (4-1) is from about 5 mole percent to about 30 mole percent based on the total amount of the repeating unit of chemical formula (3-1) and the repeating unit of chemical formula (4-1).

Assignees

• Samsung Display Co Ltd

Inventors

• Jeon Jong Hwan
• Kang Suk Hoon
• Kim In Ok
• Jeon Baek Kyun

Classifications

• Y10T428/1023

  Cross-Sectional Technologies · mapped topic

• G02F1/133711

  by organic films, e.g. polymeric films · CPC title

• G02F1/13378

  by treatment of the surface, e.g. embossing, rubbing or light irradiation (G02F1/133711, G02F1/133734, G02F1/133753 take precedence) · CPC title

• Y10T428/10

  Cross-Sectional Technologies · mapped topic

• Y10T428/1018

  Cross-Sectional Technologies · mapped topic