Liquid crystal composition and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-9487703-B2
Application number	US-201414561221-A
Country	US
Kind code	B2
Filing date	Dec 5, 2014
Priority date	Dec 12, 2013
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

A liquid crystal composition and an AM-type liquid crystal display device including the same are described. The liquid crystal composition has a nematic phase, contains a specific compound having a large positive dielectric anisotropy as a first component, and a specific compound having a small viscosity as a second component, and may also contain at least one of a specific compound having a high maximum temperature or a small viscosity as a third component, a specific compound having a large positive dielectric anisotropy as a fourth component, and a specific compound having a negative dielectric anisotropy as a fifth component.

First claim

The invention claimed is:

1. A liquid crystal composition that has a nematic phase and contains at least one compound represented by formula (1) as a first component and at least one compound represented by formula (2) as a second component:

wherein in formulas (1) and (2), R is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons; R 2 is 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 halogen, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by halogen; R 3 is alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by halogen; ring A is 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,3-difluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, pyrimidine-2,5-diyl, 1,3-dioxane-2,5-diyl, tetrahydropyran-2,5-diyl or naphthalene-2,6-diyl; Z 1 is a single bond, ethylene, vinylene, methyleneoxy, carbonyloxy or difluoromethyleneoxy, wherein at least one of Z 1 is difluoromethyleneoxy; X 1 and X 2 are independently hydrogen or fluorine; and j is 1, 2, 3 or 4.

2. The liquid crystal composition of claim 1 , containing at least one compound selected from the group of compounds represented by formulas (1-1) to (1-11) as the first component:

wherein in formulas (1-1) to (1-11), R 1 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons; and X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , X 8 , X 9 , X 10 , X 11 , X 12 , X 13 and X 14 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 5 wt % to 40 wt %, and a proportion of the second component is in a range of 5 wt % to 60 wt %, based on a weight of the liquid crystal composition.

4. The liquid crystal composition of claim 1 , further containing at least one compound represented by formula (3) as a third component:

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

5. The liquid crystal composition of claim 4 , containing at least one compound selected from the group of compounds represented by formulas (3-1) to (3-12) as the third component:

wherein in formulas (3-1) to (3-12), R 4 and R 5 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by halogen.

6. The liquid crystal composition of claim 4 , wherein a proportion of the third component is in a range of 5 wt % to 70 wt % based on a weight of the liquid crystal composition.

7. The liquid crystal composition of claim 1 , further containing at least one compound represented by formula (4) as a fourth component:

wherein in formula (4), R 6 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons; ring D is 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,3-difluoro-1,4-phenylene, 2,6-difluoro-1,4-phenyl ene, pyrimidine-2,5-diyl, 1,3-dioxane-2,5-diyl or tetrahydropyran-2,5-diyl; Z 3 is a single bond, ethylene, carbonyloxy or difluoromethyleneoxy; X 15 and X 16 are independently hydrogen or fluorine; Y 1 is fluorine, chlorine, alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by halogen, alkoxy having 1 to 12 carbons in which at least one hydrogen is replaced by halogen, or alkenyloxy having 2 to 12 carbons in which at least one hydrogen is replaced by halogen; and p is 1, 2, 3 or 4.

8. The liquid crystal composition of claim 4 , further containing at least one compound represented by formula (4) as a fourth component:

wherein in formula (4), R 6 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons; ring D is 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,3-difluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, pyrimidine-2,5-diyl, 1,3-dioxane-2,5-diyl or tetrahydropyran-2,5-diyl; Z 3 is a single bond, ethylene, carbonyloxy or difluoromethyleneoxy; X 15 and X 16 are independently hydrogen or fluorine; Y 1 is fluorine, chlorine, alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by halogen, alkoxy having 1 to 12 carbons in which at least one hydrogen is replaced by halogen, or alkenyloxy having 2 to 12 carbons in which at least one hydrogen is replaced by halogen; and p is 1, 2, 3 or 4.

9. The liquid crystal composition of claim 7 , containing at least one compound selected from the group of compounds represented by formulas (4-1) to (4-34) as the fourth component:

wherein in formulas (4-1) to (4-34), R 6 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons.

10. The liquid crystal composition of claim 8 , containing at least one compound selected from the group of compounds represented by formulas (4-1) to (4-34) as the fourth component:

wherein in formulas (4-1) to (4-34), R 6 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons.

11. The liquid crystal composition of claim 7 , wherein a proportion of the fourth component is in a range of 3 wt % to 40 wt % based on a weight of the liquid crystal composition.

12. The liquid crystal composition of claim 8 , wherein a proportion of the fourth component is in a range of 3 wt % to 40 wt % based on a weight of the liquid crystal composition.

13. The liquid crystal composition of claim 1 , containing at least one compound

Assignees

• Jnc Corp
• Jnc Petrochemical Corp

Inventors

• Saito Masayuki
• Furusato Yoshimasa

Classifications

• C09K2019/3422

  the heterocyclic ring being a six-membered ring · CPC title

• C09K19/3068

  chain containing -COO- or -OCO- groups · CPC title

• C09K2019/301

  Cy-Cy-Ph · CPC title

• C09K2019/3083

  Cy-Ph-COO-Ph · CPC title

• C09K19/3066

  in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers · CPC title