Curved liquid crystal display and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-10018875-B2
Application number	US-201615002012-A
Country	US
Kind code	B2
Filing date	Jan 20, 2016
Priority date	Aug 18, 2015
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

A curved liquid crystal display comprises, a first curved substrate; a second curved substrate facing the first curved substrate; a liquid crystal layer disposed between the first curved substrate and the second curved substrate; a first curved liquid crystal alignment layer disposed between the liquid crystal layer and the first curved substrate and containing a light stabilizer; and a second curved liquid crystal alignment layer disposed between the liquid crystal layer and the second curved substrate.

First claim

What is claimed is:

1. A curved liquid crystal display comprising:
a first curved substrate;
a second curved substrate facing the first curved substrate;
a liquid crystal layer disposed between the first curved substrate and the second curved substrate;
a first curved liquid crystal alignment layer disposed between the liquid crystal layer and the first curved substrate and containing a light stabilizer; and
a second curved liquid crystal alignment layer disposed between the liquid crystal layer and the second curved substrate,
wherein the light stabilizer is a compound represented by following Chemical Formula 1:

wherein, n is 0 or 1; m is 0 or 1; Z1 to Z3 are each independently a single bond, a divalent alkenyl group, a divalent alkyl group, a divalent alkoxy group, —C(O)O—, or —CF 2 O—; X1 to X8 are each independently an alkyl group, H, F, or CF 3 ; and A and B are each independently of the following formulas:

2. The curved liquid crystal display of claim 1 , wherein the second curved liquid crystal alignment layer does not contain the light stabilizer.

3. The curved liquid crystal display of claim 2 , wherein the second curved liquid crystal alignment layer comprises a reactive mesogen and an amount of the reactive mesogen is higher in the second curved liquid crystal alignment layer than an amount in the first curved liquid crystal alignment layer.

4. The curved liquid crystal display of claim 2 , wherein the second curved liquid crystal alignment layer has a multilayer structure including a 2-1 st curved liquid crystal alignment layer and a 2-2 nd curved liquid crystal alignment layer comprising a reactive mesogen, and an amount of the reactive mesogen in the 2-2 nd curved liquid crystal alignment layer is higher than an amount in the 2-1 st curved liquid crystal alignment layer.

5. The curved liquid crystal display of claim 1 , wherein in the Chemical Formula 1, Z1 to Z3 are each independently a single bond, a divalent alkenyl group having 2 to 5 carbon atoms, a divalent alkyl group having 1 to 5 carbon atoms, a divalent alkoxy group, —C(O)O—, or —CF 2 O—; and X1 to X8 are each independently CH 3 , H, F, or CF 3 .

6. The curved liquid crystal display of claim 1 , wherein the light stabilizer is represented by the following Chemical Formula 2:

7. The curved liquid crystal display of claim 1 , wherein the light stabilizer is represented by following Chemical Formula 3:

8. The curved liquid crystal display of claim 1 , wherein the light stabilizer is in a derivatized form and is present as a side chain of a polyimide in the first curved liquid crystal alignment layer.

9. The curved liquid crystal display of claim 1 , wherein the light stabilizer is present in an amount of greater than 0 ppm and equal to or less than about 10,000 ppm with respect to an overall weight of the first curved liquid crystal alignment layer.

10. The curved liquid crystal display of claim 1 , wherein the liquid crystal layer includes first liquid crystal molecules having negative dielectric constant anisotropy aligned with a surface of the first curved liquid crystal alignment layer, and second liquid crystal molecules aligned with a surface of the second curved liquid crystal alignment layer, and
wherein the first liquid crystal molecules are vertically aligned as compared to the second liquid crystal molecules when an electrical field is not applied to the liquid crystal layer.

11. The curved liquid crystal display of claim 1 , further comprising:
a patternless electrode disposed between the first curved substrate and the first curved liquid crystal alignment layer and having no slit pattern; and
a pattern electrode disposed between the second curved liquid crystal alignment layer and the second curved substrate and having a slit pattern.

12. A method of manufacturing a curved liquid crystal display, comprising:
preparing a first curved substrate and a second curved substrate facing each other;
forming a first curved liquid crystal alignment layer on a surface of the first curved substrate facing the second curved substrate;
forming a second curved liquid crystal alignment layer on a surface of the second curved substrate facing the first curved substrate;
injecting a liquid crystal composition into a space between the first curved substrate and the second curved substrate; and
irradiating ultraviolet light in a direction toward at least one of the first curved substrate and the second curved substrate when an electric field is applied,
wherein the first curved liquid crystal alignment layer comprises a light stabilizer,
wherein the light stabilizer is a compound represented by following Chemical Formula 1:

wherein, n is 0 or 1; m is 0 or 1; Z1 to Z3 are each independently a single bond, a divalent alkenyl group, a divalent alkyl group, a divalent alkoxy group, —C(O)O—, or —CF 2 O—; X1 to X8 are each independently an alkyl group, H, F, or CF 3 ; and A and B are each independently of the following formulas:

13. The method of claim 12 , wherein in Chemical Formula 1, Z1 to Z3 are each independently a single bond, a divalent alkenyl group having 2 to 5 carbon atoms, an alkyl group having 1 to 5 carbon atoms, an alkoxy group, —C(O)O—, or —CF 2 O—; and X1 to X8 are each independently CH 3 , H, F, or CF 3 .

14. The method of claim 12 , wherein the light stabilizer is represented by following Chemical Formula 2:

15. The method of claim 12 , wherein the light stabilizer is represented by following Chemical Formula 3:

16. The method of claim 12 , wherein the light stabilizer is present in an amount of greater than 0 ppm and equal to or less than about 10,000 ppm with respect to an overall weight of the first curved liquid crystal alignment layer.

17. The method of claim 12 , wherein at least one of the first curved liquid crystal alignment layer, the second curved liquid crystal alignment layer, and the liquid crystal composition comprises a reactive mesogen.

18. The method of claim 17 , wherein due to the irradiating of ultraviolet light, the second curved liquid crystal alignment layer has a multilayer structure comprising a 2-1 st curved liquid crystal alignment layer and a 2-2 nd curved liquid crystal alignment layer, and an amount of reactive mesogen in the 2-2 nd curved liquid crystal alignment layer is higher than an amount in the 2-1 st curved liquid crystal alignment layer.

Assignees

• Samsung Display Co Ltd
• Samsung Display Co Ltd

Inventors

• Bae Ji Hong
• Park Heung Shik
• Oh Keun Chan

Classifications

• G02F2001/133726

  Physics · mapped topic

• C09K2019/548

  stabilizing the alignment; Polymer stabilized alignment · CPC title

• G02F1/1341

  Filling or closing of cells · CPC title

• C09K19/54

  Additives having no specific mesophase {characterised by their chemical composition} · CPC title

• C09K19/3483

  the heterocyclic ring being a non-aromatic ring · CPC title