Liquid crystal composition and liquid crystal display device comprising the same

Patent metadata

Field	Value
Publication number	US-10106739-B2
Application number	US-201615091371-A
Country	US
Kind code	B2
Filing date	Apr 5, 2016
Priority date	May 29, 2015
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

A liquid crystal composition includes one or more compounds represented by Chemical Formula 1.

In Chemical Formula 1,

are a cyclohexane or tetrahydropyran, and R1 and R2 are each independently hydrogen, a C1 to C8 alkyl group, a C2 to C8 alkenyl group, or a C1 to C8 alkoxy group.

First claim

What is claimed is:

1. A liquid crystal composition comprising:
one or more compound represented by Chemical Formula 1:

wherein,

are independently a cyclohexane or a tetrahydropyran, or

are independently a substituted cyclohexane or a substituted tetrahydropyran, in which one or more hydrogen is substituted with F, or one or more —CH 2 —group is substituted with —O— or —CF 2 , and
R1 is a C1 to C8 alkyl group, a C2 to C8 alkenyl group, a C1 to C8 alkoxy group, a substituted C1 to C8 alkyl group, a substituted C2 to C8 alkenyl group, or a substituted C1 to C8 alkoxy group, in which one or more hydrogen is substituted with F, one or more —CH 2 — group is substituted with —OCH 2 —, —CF 2 —, or —OCF 2 —, or one or more —CH 3 group is substituted with —CF 3 or —OCF 3 , and R2 is a C2 to C8 alkenyl group, a C1 to C8 alkoxy group, a substituted C1 to C8 alkyl group, a substituted C2 to C8 alkenyl group, or a substituted C1 to C8 alkoxy group, in which one or more hydrogen is substituted with F, one or more —CH 2 — group is substituted with —OCH 2 —, —CF 2 —, or —OCF 2 —, or one or more —CH 3 group is substituted with —CF 3 or —OCF 3 , or
R1 is a substituted C1 to C8 alkoxy group in which one or more hydrogen is substituted with F and R2 is a C1 to C8 alkyl group, and
at least one compound selected from Chemical Formulas 2-1 to 2-8:

wherein, R3 and R4 are independently hydrogen, a C1 to C8 alkyl group, a C2 to C8 alkenyl group, or a C1 to C8 alkoxy group, or wherein R3 and R4 are a substituted C1 to C8 alkyl group, a substituted C2 to C8 alkenyl group, or a substituted C1 to C8 alkoxy group in which one or more hydrogen is substituted with F, one or more —CH 2 — group is substituted with —OCH 2 —, —CF 2 —, or —OCF 2 —, or one or more —CH 3 group is substituted with —CF 3 or —OCF 3 .

2. The liquid crystal composition of claim 1 , wherein:
the compound represented by Chemical Formula 1 is at least one compound selected from Chemical Formulas 1-2 to 1-9:

3. The liquid crystal composition of claim 1 , wherein:
the compound represented by Chemical Formula 1 is present in an amount of about 1 wt % to about 40 wt % based on the entire weight of the liquid crystal composition.

4. The liquid crystal composition of claim 1 , wherein:
the compound selected from Chemical Formulas 2-1 to 2-8 is present in an amount of about 2 wt % to about 40 wt %, based upon the entire weight of the liquid crystal composition.

5. The liquid crystal composition of claim 1 , wherein:
the liquid crystal composition further comprises at least one compound selected from Chemical Formulas 3-1 to 3-12:

wherein, R5 and R6 are independently hydrogen, a C1 to C8 alkyl group, a C2 to C8 alkenyl group, or a C1 to C8 alkoxy group, or
R5 and R6 are independently hydrogen a substituted a C1 to C8 alkyl group, a substituted C2 to C8 alkenyl group, or a substituted C1 to C8 alkoxy group, in which at least one hydrogen in R5 and R6 is substituted with fluorine.

6. The liquid crystal composition of claim 5 , wherein:
the compound selected from Chemical Formulas 3-1 to 3-12 is present in an amount of about 2 wt % to about 30 wt % based upon the entire liquid crystal composition.

7. A liquid crystal display comprising:
a first insulation substrate comprising a pixel electrode;
a second insulation substrate facing the first insulation substrate and comprising a common electrode; and
a liquid crystal layer positioned between the first insulation substrate and the second insulation substrate,
wherein the liquid crystal layer comprises one or more compound represented by Chemical Formula 1:

wherein,

are independently a cyclohexane or tetrahydropyran, or

are independently a substituted cyclohexane or substituted tetrahydropyran, in which one or more hydrogen is substituted with F, or one or more —CH 2 — group is substituted with —O— or —CF 2 and
R1 and R2 are independently hydrogen, a C1 to C8 alkyl group, a C2 to C8 alkenyl group, or a C1 to C8 alkoxy group, or R1 and R2 are independently a substituted C1 to C8 alkyl group, a substituted C2 to C8 alkenyl group, or a substituted C1 to C8 alkoxy group, in which one or more hydrogen is substituted with F, one or more —CH 2 — group is substituted with —OCH 2 —, —CF 2 —, or —OCF 2 —, or one or more —CH 3 group is substituted with —CF 3 or —OCF 3 .

8. The liquid crystal display of claim 7 , wherein:
the compound represented by Chemical Formula 1 is at least one compound selected from Chemical Formulas 1-1 to 1-9:

9. The liquid crystal display of claim 7 , wherein:
the compound represented by Chemical Formula 1 is present in an amount of about 1 wt % to about 40 wt % based upon the entire weight of the liquid crystal composition.

10. The liquid crystal display of claim 7 , wherein:
the liquid crystal layer further comprises at least one compound selected from Chemical Formulas 2-1 to 2-8:

wherein, R3 and R4 are independently hydrogen, a C1 to C8 alkyl group, a C2 to C8 alkenyl group, or a C1 to C8 alkoxy group, or wherein R3 and R4 are independently a substituted C1 to C8 alkyl group, a substituted C2 to C8 alkenyl group, or a substituted C1 to C8 alkoxy group in which one or more hydrogen is substituted with F, one or more —CH 2 — group is substituted with —OCH 2 —, —CF 2 —, or —OCF 2 —, or one or more —CH 3 group is substituted with —CF 3 or —OCF 3 .

11. The liquid crystal display of claim 10 , wherein:
the compound selected from Chemical Formulas 2-1 to 2-8 is present in an amount of about 2 wt % to about 40 wt % based on the entire weight of the liquid crystal composition.

12. The liquid crystal display of claim 7 , wherein:
the liquid crystal layer further comprises at least one compound selected from Chemical Formulas 3-1 to 3-12:

wherein, R5 and R6 are independently hydrogen, a C1 to C8 alkyl group, a C2 to C8 alkenyl group, or a C1 to C8 alkoxy group, or
R5 and R6 are independently a substituted C1 to C8 alkyl group, a substituted C2 to C8 alkenyl group, or a substituted C1 to C8 alkoxy group, in which at least one hydrogen in R5 and R6 is substituted with fluorine.

13. The liquid crystal display of claim 12 , wherein:
the compou

Assignees

• Samsung Display Co Ltd

Inventors

• Kwon Sun Young
• Takeshita Fusayuki
• Oh Keun Chan

Classifications

• C09K2019/3422

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

• C09K2019/3027

  Compounds comprising 1,4-cyclohexylene and 2,3-difluoro-1,4-phenylene · CPC title

• C09K2019/3016

  Cy-Ph-Ph · CPC title

• C09K2019/301

  Cy-Cy-Ph · CPC title

• C09K2019/3009

  Cy-Ph · CPC title