Composition for alignment layer, array substrate for display device comprising the same

Patent metadata

Field	Value
Publication number	US-10066166-B2
Application number	US-201615048643-A
Country	US
Kind code	B2
Filing date	Feb 19, 2016
Priority date	Sep 3, 2015
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

A composition for an alignment layer includes a polyimide-based compound including a polymerization initiator coupled to a side chain of the polyimide-based compound.

First claim

What is claimed is:

1. A composition for an alignment layer, the composition comprising:
a polyimide-based compound; and
a polymerization initiator coupled to a side chain of the polyimide-based compound,
wherein the polyimide-based compound is represented by following Chemical Formula 7:

wherein X is the polymerization initiator.

2. The composition of claim 1 , wherein an amount of the polymerization initiator in the composition is about 10 weight % to about 60 weight %.

3. The composition of claim 1 , wherein the polyimide-based compound comprises units derived from a diamine-based compound and a dianhydride compound.

4. The composition of claim 1 , further comprising a crosslinking agent.

5. The composition of claim 4 , wherein an amount of the crosslinking agent in the composition is about 1 weight % to about 10 weight %.

6. The composition of claim 1 , wherein the polymerization initiator is represented by Chemical Formulas 1 to 6:

7. The composition of claim 1 , wherein the compound of Chemical Formula 7 is represented by Chemical Formula 8:

8. The composition of claim 4 , wherein the crosslinking agent comprises at least one of an epoxy-based compound, a silane-based compound, and an organic peroxide-based compound.

9. An array substrate for a display device, comprising:
a first substrate and a second substrate comprising a display area and a non-display area surrounding the display area, the first and second substrate facing each other;
a liquid-crystal layer disposed between the first and second substrates;
a lower alignment layer disposed on a surface of the first substrate facing the second substrate;
an upper alignment layer disposed on a surface of the second substrate facing the first substrate; and
a sealant disposed in the non-display area and sealing the display area,
wherein at least one of the upper alignment layer and the lower alignment layer comprise a composition comprising a polyimide-based compound and a polymerization initiator coupled to a side chain of the polyimide-based compound, and
wherein the at least one of the upper alignment layer and the lower alignment layer alignment layer comprising the composition comprising the polyimide-based compound and the polymerization initiator coupled to a side chain of the polyimide-based compound is chemically covalently coupled to the sealant.

10. The array substrate of claim 9 , wherein the composition further comprises a crosslinking agent.

11. The array substrate of claim 10 , wherein an amount of the crosslinking agent in the composition is about 1 weight % to about 10 weight %.

12. The array substrate of claim 9 , wherein at least one of the upper alignment layer and the lower alignment layer is in contact with the sealant.

13. The array substrate of claim 12 , wherein at least a portion of the lower alignment layer is disposed between the sealant and the first substrate.

14. The array substrate of claim 12 , wherein at least a portion of the upper alignment layer is disposed between the sealant and the second substrate.

15. The array substrate of claim 9 , further comprising a black matrix disposed between the lower alignment layer and the first substrate.

16. The array substrate of claim 15 , further comprising a color filter disposed between the black matrix and the first substrate.

17. The array substrate of claim 9 , wherein the polymerization initiator is represented by Chemical Formulas 1 to 6:

18. The array substrate of claim 17 , wherein the polyimide-based compound is represented by Chemical Formula 7:

wherein X is the polymerization initiator of Chemical Formulas 1 to 6.

19. The array substrate of claim 18 , wherein the compound of Chemical Formula 7 is represented by Chemical Formula 8:

Assignees

• Samsung Display Co Ltd
• Samsung Display Co Ltd

Inventors

• Lee Taek Joon
• Kwon Oh Jeong
• Song Dong Han
• Shin Ki Chul
• Shin Dong Chul
• Lee Hyeok Jin

Classifications

• B32B2457/202

  LCD, i.e. liquid crystal displays · CPC title

• C09K19/56 Primary

  Aligning agents · CPC title

• G02F1/133719

  with coupling agent molecules, e.g. silane · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• C08G73/1025

  polymerised by radiations · CPC title