Liquid crystal composition and liquid crystal display device including the same

Patent metadata

Field	Value
Publication number	US-2016348003-A1
Application number	US-201514960892-A
Country	US
Kind code	A1
Filing date	Dec 7, 2015
Priority date	May 26, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

A liquid crystal composition includes an amine light stabilizer including a first compound represented by Formula 1 and a second compound represented by Formula 2; and a liquid crystal:

First claim

What is claimed is:

1 . A liquid crystal composition comprising:
an amine light stabilizer comprising a first compound represented by Formula 1 and a second compound represented by Formula 2; and a liquid crystal:

wherein, in Formulae 1 and 2,
Z 1 and Z 2 are each independently selected from a substituted or unsubstituted C 1 -C 20 alkylene group, a substituted or unsubstituted C 2 -C 20 alkenylene group and a substituted or unsubstituted C 3 -C 30 cycloalkylene group;
Y 1 to Y 4 are each independently selected from *—O—*′, *—(C═O)—O—*′, *—O—(C═O)—*′, and *—O—(C═O)—O—*′;
R 11 to R 18 and R 21 to R 28 are each independently selected from hydrogen, a substituted or unsubstituted C 1 -C 20 alkyl group and a substituted or unsubstituted C 1 -C 20 alkoxy group,
at least one substituent of the substituted C 1 -C 20 alkylene group, substituted C 2 -C 20 alkenylene group, substituted C 3 -C 30 cycloalkylene group, substituted C 1 -C 20 alkyl group, and substituted C 1 -C 20 alkoxy group is selected from fluorine, chlorine, bromine, iodine,—a cyano group, a C 1 -C 5 alkyl group and a C 1 -C 5 alkoxy group;
O. is an oxygen radical; and
each of * and *′ is a binding site to a neighboring atom.

2 . The liquid crystal composition of claim 1 , wherein:
Z 1 and Z 2 are each independently selected from a C 1 -C 10 alkylene group; and a C 1 -C 10 alkylene group, substituted with at least one selected from fluorine, chlorine, bromine, iodine, a cyano group, a C 1 -C 5 alkyl group and a C 1 -C 5 alkoxy group, Y 1 to Y 4 are each independently *—(C═O)—O—*′ or * —O—(C═O)—*′, and R 11 to R 18 and R 21 to R 28 are each independently selected from a C 1 -C 10 alkyl group; and a C 1 -C 10 alkyl group, substituted with at least one selected from fluorine, chlorine, bromine, iodine, a cyano group, a C 1 -C 5 alkyl group and a C 1 -C 5 alkoxy group.

3 . The liquid crystal composition of claim 1 , wherein:
Z 1 and Z 2 are each independently selected from a C 6 -C 9 alkylene group; and a C 6 -C 9 alkylene group, substituted with at least one selected from fluorine, chlorine, bromine, iodine, a cyano group, a C 1 -C 5 alkyl group and a C 1 -C 5 alkoxy group, Y 1 to Y 4 are each independently *—(C═O)—O—*′ or *—O—(C═O)—*′, and R 11 to R 18 and R 21 to R 28 are each independently selected from a C 1 -C 5 alkyl group; and a C 1 -C 5 alkyl group, substituted with at least one selected from fluorine, chlorine, bromine, iodine, a cyano group, a C 1 -C 3 alkyl group and a C 1 -C 3 alkoxy group.

4 . The liquid crystal composition of claim 1 , wherein
Z 1 and Z 2 are each independently selected from a C 6 -C 9 alkylene group; and a C 6 -C 9 alkylene group, substituted with at least one selected from fluorine, chlorine, bromine, iodine, a cyano group, a C 1 -C 5 alkyl group and a C 1 -C 5 alkoxy group, Y 1 to Y 4 are each independently *—(C═O)—O—*′ or *—O—(C═O)—*′, and R 11 to R 18 and R 21 to R 28 are each independently selected from a C 1 -C 3 alkyl group; and a C 1 -C 3 alkyl group, substituted with at least one selected from fluorine, chlorine, bromine, iodine, a cyano group, a C 1 -C 3 alkyl group and a C 1 -C 3 alkoxy group.

5 . The liquid crystal composition of claim 1 , wherein
the first compound is represented by Formula 1-1, and the second compound is represented by Formula 2-1:

wherein, in Formulae 1-1 and 2-1,
Z 1 and Z 2 are each independently selected from a substituted or unsubstituted C 1 -C 20 alkylene group, a substituted or unsubstituted C 2 -C 20 alkenylene group and a substituted or unsubstituted C 3 -C 30 cycloalkylene group;
R 11 to R 18 and R 21 to R 28 are each independently selected from hydrogen, a substituted or unsubstituted C 1 -C 20 alkyl group and a substituted or unsubstituted C 1 -C 20 alkoxy group,
at least one substituent of the substituted C 1 -C 20 alkylene group, substituted C 2 -C 20 alkenylene group, substituted C 3 -C 30 cycloalkylene group, substituted C 1 -C 20 alkyl group and substituted C 1 -C 20 alkoxy group is selected from fluorine, chlorine, bromine, iodine, a cyano group, a C 1 -C 5 alkyl group and a C 1 -C 5 alkoxy group; and
O. is an oxygen radical.

6 . The liquid crystal composition of claim 1 , wherein
the amine light stabilizer is present in an amount of about 0.001 to about 0.05 parts by weight, based on 100 parts by weight of the liquid crystal composition.

7 . The composition of claim 1 , wherein
a weight ratio of the first compound to the second compound is about 2:8 to about 2:8.

8 . The liquid crystal composition of claim 1 , wherein
the liquid crystal has a negative dielectric anisotropy.

9 . The liquid crystal composition of claim 1 , wherein the liquid crystal has a dielectric anisotropy of about −0.5 to about 9.5.

10 . The liquid crystal composition of claim 1 , wherein
the liquid crystal comprises at least one selected from an alkenyl-based liquid crystal, an alkoxy-based liquid crystal and a terphenyl-based liquid crystal.

11 . The liquid crystal composition of claim 10 , wherein
the alkenyl-based liquid crystal is represented by Formula 10 or 11:

wherein X 1 and X 2 in Formulae 10 and 11 are each independently selected from
a C 1 -C 5 alkyl group; and
a C 1 -C 5 alkyl group, substituted with at least one selected from fluorine, chlorine, bromine, iodine, a cyano group, a C 1 -C 5 alkyl group and a C 1 -C 5 alkoxy group.

12 . The liquid crystal composition of claim 10 , wherein
the liquid crystal comprises the alkenyl-based liquid crystal, and the alkenyl-based liquid crystal is present in an amount of about 20 to about 60 parts by weight, based on 100 parts by weight of the liquid crystal composition.

13 . The liquid crystal composition of claim 1 , wherein
the liquid crystal is present in an amount of about 40 to about 80 parts by weight based, on 100 parts by weight of the liquid crystal composition.

14 . The liquid crystal composition of claim 1 , wherein
the liquid crystal has a rotational viscosity of about 85 to about 110 milli-Pascal/second and a cell gap of about 3.0 micrometers to about 3.3 micrometers.

15 . The liquid crystal composition of claim 1 , further comprising
a reactive mesogen.

16 . A liquid crystal display device, comprising:
a first substrate; a second substrate facing the first substrate; and a liquid crystal layer disposed between the first substrate and the second substrate, wherein the liquid crystal layer comprises the liquid crystal composition of claim 1 .

17 . The liquid crystal display device of claim 16 , further comprising at least one of
a first alignment layer disposed between the first substrate and the liquid crystal layer; and a second alignment layer disposed between the second substrate and the liquid crystal layer.

18 . The liquid crystal display device of claim 16 ,: further comprising
a color filter disposed on one of the first substrate and the second substrate; and an array layer disposed on the other of the first substrate and the second

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Minhee
• Kim Misuk
• Kim Taeho
• Hong Sunghwan

Classifications

• C09K19/3003

  Compounds containing at least two rings in which the different rings are directly linked (covalent bond) · CPC title

• C09K2019/3004

  Cy-Cy · CPC title

• G02F1/134363

  for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS] · CPC title

• C09K19/54 Primary

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

• G02F1/1337

  Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers · CPC title