Liquid crystal composition and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-9562190-B2
Application number	US-201514811856-A
Country	US
Kind code	B2
Filing date	Jul 29, 2015
Priority date	Aug 25, 2014
Publication date	Feb 7, 2017
Grant date	Feb 7, 2017

Abstract

A liquid crystal composition and an AM LCD device including the same are described. The liquid crystal composition has a negative dielectric anisotropy, contains a specific compound having a large negative dielectric anisotropy as a first component, and may further contain a specific compound having high a maximum temperature or a small viscosity as a second component, a specific compound having a negative dielectric anisotropy as a third component, and/or a specific compound having a polymerizable group as an additive component.

First claim

The invention claimed is:

1. A liquid crystal composition that has a negative dielectric anisotropy, and contains at least one compound selected from the group consisting of compounds represented by formula (1) as a first component:

wherein in formula (1), R 1 and R 2 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; ring A and ring B are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, or 1,4-phenylene in which at least one hydrogen is replaced by fluorine or chlorine; Z 1 and Z 2 are independently a single bond, ethylene or carbonyloxy; X 1 and X 2 are independently hydrogen or fluorine; a is 0, 1, 2 or 3; b is 0 or 1; and a sum of a and b is 3 or less.

2. The liquid crystal composition of claim 1 , containing at least one compound selected from the group consisting of compounds represented by formulae (1-1) to (1-9) as the first component:

wherein in formulae (1-1) to (1-9), R 1 and R 2 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; X 1 , X 2 , X 3 and X 4 are independently hydrogen or fluorine.

3. The liquid crystal composition of claim 1 , wherein a proportion of the first component is in a range of 3 wt % to 25 wt % based on a weight of the liquid crystal composition.

4. The liquid crystal composition of claim 1 , further containing at least one compound selected from the group consisting of compounds represented by formula (2) as a second component:

wherein in formula (2), R 3 and R 4 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine;
ring C and ring D are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene or 2,5-difluoro-1,4-phenylene; Z 3 is a single bond, ethylene or carbonyloxy; m is 1, 2 or 3.

5. The liquid crystal composition of claim 4 , containing at least one compound selected from the group consisting of compounds represented by formulae (2-1) to (2-13) as the second component:

wherein in formulae (2-1) to (2-13), R 3 and R 4 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine.

6. The liquid crystal composition of claim 4 , wherein a proportion of the second component is in a range of 20 wt % to 90 wt % based on a weight of the liquid crystal composition.

7. The liquid crystal composition of claim 4 , further containing at least one compound selected from the group consisting of compounds represented by formula (3) as a third component:

wherein in formula (3), R 5 and R 6 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; ring E and ring G are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, or 1,4-phenylene in which at least one hydrogen is replaced by fluorine or chlorine; ring F is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, 2,3-difluoro-5-methyl-1,4-phenylene, 3,4,5-trifluoronaphthalene-2,6-diyl or 7,8-difluorochroman-2,6-diyl; Z 4 and Z 5 are independently a single bond, ethylene, carbonyloxy or methyleneoxy; p is 1, 2 or 3; q is 0 or 1; and a sum of p and q is 3 or less.

8. The liquid crystal composition of claim 7 , containing at least one compound selected from the group consisting of compounds represented by formulae (3-1) to (3-19) as the third component:

wherein in formula (3-1) to formula (3-19), R 5 and R 6 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine.

9. The liquid crystal composition of claim 7 , wherein a proportion of the third component is in a range of 10 wt % to 80 wt % based on a weight of the liquid crystal composition.

10. The liquid crystal composition of claim 4 , further containing at least one polymerizable compound selected from the group consisting of compounds represented by formula (4) as an additive component:

wherein in formula (4), ring K and ring M are independently cyclohexyl, cyclohexenyl, phenyl, 1-naphthyl, 2-naphthyl, tetrahydropyran-2-yl, 1,3-dioxane-2-yl, pyrimidine-2-yl, or pyridine-2-yl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine;
ring L is 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, naphthalene-1,2-diyl, naphthalene-1,3-diyl, naphthalene-1,4-diyl, naphthalene-1,5-diyl, naphthalene-1,6-diyl, naphthalene-1,7-diyl, naphthalene-1,8-diyl, naphthalene-2,3-diyl, naphthalene-2,6-diyl, naphthalene-2,7-diyl, tetrahydropyran-2,5-diyl, 1,3-dioxane-2,5-diyl, pyrimidine-2,5-diyl or pyridine-2,5-diyl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; Z 6 and Z 7 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one —CH 2 — may be replaced by —O—, —CO—, —COO— or —OCO—, at least one —CH 2 —CH 2 — may be replaced by —CH═CH—, —C(CH 3 )═CH—, —CH═C(CH 3 )— or —C(CH 3 )═C(CH 3 )—, and in the alkylene and the groups obtained through the replacement, at least one hydrogen may be replaced by fluorine or chlorine; P 1 , P 2 and P 3 are independently a polymerizable group; Sp 1 , Sp 2 and Sp 3 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one —CH 2 — may b

Assignees

• Jnc Corp
• Jnc Petrochemical Corp

Inventors

• Saito Masayuki
• Furusato Yoshimasa

Classifications

• C09K2019/0448

  the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate · CPC title

• C09K2019/3425

  Six-membered ring with oxygen(s) in fused, bridged or spiro ring systems · CPC title

• C09K19/32

  containing condensed ring systems, i.e. fused, bridged or spiro ring systems · CPC title

• C09K2019/548

  stabilizing the alignment; Polymer stabilized alignment · CPC title

• C09K19/3098

  Unsaturated non-aromatic rings, e.g. cyclohexene rings · CPC title