Alignment film and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-10160910-B2
Application number	US-201515515288-A
Country	US
Kind code	B2
Filing date	Sep 24, 2015
Priority date	Sep 30, 2014
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

An alignment film includes a copolymer containing a repeating structural unit represented by the following formula (1), wherein X1 and X2 may be the same as or different from each other and are each represented by any one of several formulas; and Y is represented by any one of several formulas

First claim

The invention claimed is:

1. An alignment film comprising:
a copolymer containing a repeating structural unit represented by the following formula (1):

wherein
X1 and X2 may be the same as or different from each other and are each a structure represented by the following formula (X-1), (X-2), (X-3), (X-4), (X-5), (X-6), (X-7), (X-8), (X-9), (X-P1), (X-P2), (X-P3), or (X-P4), where a hydrogen atom may be replaced,
Y is a structure represented by the following formula (Y-1), (Y-2), (Y-3), (Y-4), (Y-5), (Y-6), (Y-7), (Y-8), (Y-9), (Y-10), (Y-11), (Y-12), (Y-P1), (Y-P2), (Y-P3), or (Y-P4), where a hydrogen atom may be replaced,
at least one of X1, X2, and Y is a photo-reactive structure, and
the photo-reactive structure is a structure represented by any of the formulas (X-P1), (X-P2), (X-P3), (X-P4), (Y-P1), (Y-P2), (Y-P3), and (Y-P4),

2. A liquid crystal display device comprising
a pair of substrates and a liquid crystal layer disposed between the substrates,
at least one of the substrates including an alignment film on a surface on the liquid crystal layer side,
the alignment film being the alignment film according to claim 1 .

3. An alignment film comprising:
a copolymer containing a repeating structural unit represented by the following formula (1):

wherein
X1 and X2 may be the same as or different from each other and are each a structure represented by the following formula (X-1), (X-2), (X-3), (X-4), (X-5), (X-6), (X-7), (X-8), (X-9), (X-P1), (X-P2), (X-P3), or (X-P4), where a hydrogen atom may be replaced,
Y is a structure represented by the following formula (Y-1), (Y-2), (Y-3), (Y-4), (Y-5), (Y-6), (Y-7), (Y-8), (Y-9), (Y-10), (Y-11), (Y-12), (Y-P1), (Y-P2), (Y-P3), or (Y-P4), where a hydrogen atom may be replaced,
the copolymer contains a repeating structural unit represented by the following formula (2):

where n is a real number greater than 0 and smaller than 1;
V is a structure represented by one of the following formulas (V-1), (V-2), (V-3), (V-4), (V-5), (V-6), (V-7), (V-8), (V-9), (V-P1), (V-P2), (V-P3), or (V-P4), where a hydrogen atom may be replaced;
W is a structure represented by the following formula (W-1), (W-2), (W-3), (W-4), (W-5), (W-6), (W-7), (W-8), (W-9), (W-10), (W-11), (W-12), (W-13), (W-14), (W-15), (W-16), (W-P1), (W-P2), (W-P3), (W-P4), (W-P5), (W-P6), (W-P7), or (W-P8), where a hydrogen atom may be replaced; and R is a horizontal alignment group or a vertical alignment group,
at least one of X1, X2, Y, V, and W is a photo-reactive structure, and
the photo-reactive structure is a structure represented by any of the above formulas (X-P1), (X-P2), (X-P3), (X-P4), (Y-P1), (Y-P2), (Y-P3), (Y-P4), (V-P1), (V-P2), (V-P3), (V-P4), (W-P1), (W-P2), (W-P3), (W-P4), (W-P5), (W-P6), (W-P7), and (W-P8,

4. The alignment film according to claim 3 , wherein R is a structure represented by the following formula (R-H1), (R-H2), (R-H3), (R-H4), (R-H5), (R-H6), (R-H7), or (R-H8)

5. The alignment film according to claim 3 , wherein R is a structure represented by the following formula (R-V1), (R-V2), (R-V3), (R-V4), (R-V5), (R-V6), or (R-V7)

6. The alignment film according to claim 3 , wherein R contains a photo-reactive functional group.

7. The alignment film according to claim 6 , wherein the photo-reactive functional group is any of a cinnamate group, a chalcone group, an azobenzene group, a coumarin group, a tolane group, and a stilbene group.

8. The alignment film according to claim 7 , wherein the photo-reactive functional group is a structure represented by the following formula (R-HP1) or (R-HP2)

9. The alignment film according to claim 7 , wherein the photo-reactive functional group is a structure represented by the following formula (R-VP1), (R-VP2), (R-VP3), (R-VP4), (R-VP5), (R-VP6), (R-VP7), (R-VP8), (R-VP9), (R-VP10), (R-VP11), (R-VP12), (R-VP13), (R-VP14), (R-VP15), (R-VP16), (R-VP17), (R-VP18), (R-VP19), (R-VP20), or (R-VP21)

Assignees

• Sharp Kk

Inventors

• Mizusaki Masanobu

Classifications

• C08G73/1078

  wholly aromatic in the diamino moiety · CPC title

• B32B2457/202

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

• B32B27/281

  comprising polyimides · CPC title

• Y10T428/1023

  Cross-Sectional Technologies · mapped topic

• G02F1/133723

  Polyimide, polyamide-imide · CPC title