Liquid crystal composition and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-10385272-B2
Application number	US-201515521303-A
Country	US
Kind code	B2
Filing date	Jul 10, 2015
Priority date	Oct 24, 2014
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

Provided is a liquid crystal composition satisfying at least one or having suitable balance regarding at least two of characteristics such as high maximum or low minimum temperature of a nematic phase, large optical anisotropy, large positive dielectric anisotropy and high stability to ultraviolet light, and a liquid crystal display device including such a composition, particularly an encapsulated liquid crystal display device, and a liquid crystal display device serving as a constituent of 3D lenses. The liquid crystal composition contains a specific compound having large optical anisotropy as a first component, and a specific compound having large optical anisotropy and large positive dielectric anisotropy as a second component; a specific compound having large positive dielectric anisotropy as a third component; and a specific compound having large optical anisotropy and further having high maximum or low minimum temperature as a fourth component, and the liquid crystal display device includes the composition.

First claim

What is claimed is:

1. A liquid crystal composition having positive dielectric anisotropy, containing at least one compound selected from the group of compounds represented by formula (1) as a first component, and at least one compound selected from the group of compounds represented by formula (2-1) or formula (2-2) as a second component, and a compound having cyano, and dielectric anisotropy as an optional component,
wherein the compound having cyano is a compound other than the compounds of the first component and the second component, and when the compound having cyano is included in the liquid crystal composition, a proportion of the compound having cyano is less than 3% by weight based on a total of the liquid crystal composition:

wherein, in formula (1), formula (2-1) and formula (2-2), R 11 , R 12 , R 21 and R 22 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons; ring A 11 is 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene or 2,6-difluoro-1,4-phenylene; ring A 21 and ring A 24 are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, 1,3-dioxane-2,5-diyl or tetrahydropyran-2,5-diyl; ring A 22 , ring A 23 , ring A 25 and ring A 26 are independently 1,4-phenylene, 2-fluoro-1,4-phenylene or 2,6-difluoro-1,4-phenylene; Z 11 , Z 21 , Z 22 , Z 23 and Z 24 are independently a single bond, ethylene, vinylene, methyleneoxy, carbonyloxy, difluoromethyleneoxy, ethynylene or tetrafluoroethylene, in which at least one of Z 21 and Z 22 is ethynylene, and at least one of Z 23 and Z 24 is ethynylene; X 11 , X 21 , X 22 , X 23 and X 24 are independently hydrogen or fluorine; Y 21 and Y 22 are independently fluorine, chlorine, alkyl having 1 to 12 carbons in which at least one piece of hydrogen may be replaced by halogen, alkoxy having 1 to 12 carbons in which at least one piece of hydrogen may be replaced by halogen, or alkenyl having 2 to 12 carbons in which at least one piece of hydrogen may be replaced by halogen; and m 21 and m 22 are independently 0, 1 or 2, and when m 21 or m 22 represents 2, a plurality of ring A 21 , Z 21 , ring A 24 and Z 23 may be identical or different, respectively.

2. The liquid crystal composition according to claim 1 , containing at least one compound selected from the group of compounds represented by formula (1-1) to formula (1-13) as the first component:

wherein, in the formulas, R 11 and R 12 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons.

3. The liquid crystal composition according to claim 1 , wherein a proportion of a compound represented by formula (1) described in claim 1 is in the range of 10% by weight to 50% by weight based on the weight of the liquid crystal composition.

4. The liquid crystal composition according to claim 1 , containing at least one compound selected from the group of compounds represented by formula (2-1-1) to formula (2-1-14) and formula (2-2-1) to formula (2-2-2) as the second component:

wherein, in the formulas, R 21 and R 22 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons.

5. The liquid crystal composition according to claim 1 , wherein a proportion of a compound represented by formula (2-1) and formula (2-2) described in claim 1 is in the range of 5% by weight to 60% by weight based on the weight of the liquid crystal composition.

6. The liquid crystal composition according to claim 1 , further containing at least one compound selected from the group of compounds represented by formula (3) as a third component:

wherein, in formula (3), R 31 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons; ring A 31 is 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, 1,3-dioxane-2,5-diyl or tetrahydropyran-2,5-diyl; ring A 32 and ring A 33 are independently 1,4-phenylene, 2-fluoro-1,4-phenylene, 1,3-dioxane-2,5-diyl or 2,6-difluoro-1,4-phenylene; Z 31 , Z 32 and Z 33 are independently a single bond, ethylene, vinylene, methyleneoxy, carbonyloxy, difluoromethyleneoxy or tetrafluoroethylene; X 31 and X 32 are independently hydrogen or fluorine; Y 31 is fluorine, chlorine, alkyl having 1 to 12 carbons in which at least one piece of hydrogen may be replaced by halogen, alkoxy having 1 to 12 carbons in which at least one piece of hydrogen may be replaced by halogen, or alkenyl having 2 to 12 carbons in which at least one piece of hydrogen may be replaced by halogen; and m 3 is 0, 1 or 2, and when m 3 represents 2, a plurality of ring A 31 and Z 31 may be identical or different, respectively.

7. The liquid crystal composition according to claim 1 , containing at least one compound selected from the group of compounds represented by formula (3-1) to formula (3-15) as the third component:

wherein, in the formulas, R 31 is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons.

8. The liquid crystal composition according to claim 6 , wherein a proportion of the third component is in the range of 1% by weight to 50% by weight based on the weight of the liquid crystal composition.

9. The liquid crystal composition according to claim 1 , further containing at least one compound selected from the group of compounds represented by formula (4):

wherein, in formula (4), R 41 and R 42 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons; ring A 41 and ring A 42 are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,5-difluoro- 1,4-phenylene or 2,6-difluoro-1,4-phenylene; Z 41 is a single bond, ethylene, vinylene, methyleneoxy, carbonyloxy, difluoromethyleneoxy, ethynylene or tetrafluoroethylene; Z 42 is a single bond, ethylene, vinylene, methyleneoxy, carbonyloxy, difluoromethyleneoxy or tetrafluoroethylene; and m 4 is 0, 1 or 2, and when m 4 represents 2, a plurality of ring A 42 and Z 42 may be identical or different, respectively.

10. The liquid crystal composition according to claim 1 , containing at least one compound selected from the group of compounds represented by formula (4-1) to formula (4-13):

wherein, in the formulas, R 41 and R 42 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons or alkenyl having 2 to 12 carbons.

11. The liquid crystal composition according to claim 9 , wherein a proportion of the compounds represented by fo

Assignees

• Jnc Corp
• Jnc Petrochemical Corp

Inventors

• Okabe Eiji

Classifications

• G02B30/27

  involving lenticular arrays · CPC title

• C09K19/20

  linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters {or ethers} · CPC title

• C09K19/16

  the chain containing carbon-to-carbon double bonds, e.g. stilbenes · CPC title

• C09K19/34

  containing at least one heterocyclic ring · CPC title

• C09K2019/3025

  Cy-Ph-Ph-Ph · CPC title