Liquid crystal composition and liquid crystal display including the same

Patent metadata

Field	Value
Publication number	US-9683172-B2
Application number	US-201614997882-A
Country	US
Kind code	B2
Filing date	Jan 18, 2016
Priority date	Mar 6, 2015
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

A liquid crystal composition includes at least one polar liquid crystal compound represented by Chemical Formula PI-1 to PI-4:

in which each n, n1, and n2 in Chemical Formula PI-1 to PI-4 is any one of 1, 2, and 3, in Chemical Formula PI-1 to PI-4, each A, A1, and A2 includes one of

each L1 to L8 includes one of —H, —F, —Cl, —OCF 3 , —CF 3 , —CH 2 F, and —CHF 2 , each Z, Z1, and Z2 includes one of single bond, —COO—, —OCO—, —CF 2 O—, —OCF 2 —, —CH 2 O—, —OCH 2 —, —SCH 2 —, —CH 2 S—, —CH 2 CH 2 —, —C 2 F 4 —, —CH 2 —CF 2 —, —CF 2 CH 2 —, —(CH 2 ) Z — (z is 1 to 3), —CH═CH—, —CF═CF—, —CH═CF—, —CF═CH—, —C═C—, and —CH═CHCH 2 O—, and R includes one of hydrogen, halogen, a cyano group, alkyl group, and an alkoxy group including 1 to 12 carbon atoms.

First claim

What is claimed is:

1. A liquid crystal composition, comprising:
at least one of polar liquid crystal compounds represented by Chemical Formula PI-1 to Chemical Formula PI-4:

wherein each of n, n1, and n2 in Chemical Formula PI-1 to Chemical Formula PI-4 is any one of 1, 2, and 3,
wherein in Chemical Formula PI-1 to Chemical Formula PI-4, each of A, A1, and A2 comprises one of

wherein in Chemical Formula PI-1 to Chemical Formula PI-4, each of L1 to L8 comprises one of —H, —F, —CI, —OCF 3 , —CF 3 , —CH 2 F, and —CHF 2 ,
wherein in Chemical Formula PI-1 to Chemical Formula PI-4, each of Z, Z1, and Z2 comprises one of single bond, —COO—, —OCO—, —CF 2 O—, —OCF 2 —, —CH 2 O—, —OCH 2 —, —SCH 2 —, —CH 2 S—, —CH 2 CH 2 —, —C 2 F 4 —, —CH 2 —CF 2 —, —CF 2 CH 2 —, —(CH 2 ) z — (z is 1 to 3), —CH═CH—, —CF═CF—, —CH═CF—, —CF═CH—, —C═C—, and —CH═CHCH 2 O—, and
wherein in Chemical Formula PI-1 to Chemical Formula PI-4, R comprises one of hydrogen, halogen, a cyano group, alkyl group, and an alkoxy group comprising 1 to 12 carbon atoms.

2. The liquid crystal composition of claim 1 , wherein compounds represented by Chemical Formula PI-1 to Chemical Formula PI-4 comprise 1 wt % to 10 wt % of the entire liquid crystal composition.

3. The liquid crystal composition of claim 1 , wherein dielectric anisotropy Δ∈ of the polar liquid crystal compounds represented by Chemical Formula PI-1 to Chemical Formula PI-1 is in a range of 10 to 30.

4. The liquid crystal composition of claim 1 , further comprising at least one liquid crystal compound represented by Chemical Formula A-1 to Chemical Formula A-7:

wherein each of X and Y in Chemical Formula A-1 to Chemical Formula A-7 comprises one alkyl group comprising 1 to 5 carbon atoms.

5. The liquid crystal composition of claim 4 , further comprising at least one neutral compound represented by Chemical Formula N-1 to Chemical Formula N-5:

wherein each of X and Y in the Chemical Formula N-1 to Chemical Formula N-5 comprises one alkyl group comprising 1 to 5 carbon atoms.

6. The liquid crystal composition of claim 5 , further comprising at least one polar compound represented by Chemical Formula P-1 to Chemical Formula P-11:

wherein each of X and Yin the Chemical Formula P-1 to Chemical Formula P-11 comprises one alkyl group comprising 1 to 5 carbon atoms.

7. A liquid crystal composition, comprising:
at least one of polar liquid crystal compounds represented by Chemical Formula PI-1 to Chemical Formula PI-4:

wherein each of n, n1, and n2 in Chemical Formula PI-1 to Chemical Formula PI-4 is any one of 1, 2, and 3,
wherein in Chemical Formula PI-1 to Chemical Formula PI-4, each of A, A1, and A2 comprises one of

wherein in Chemical Formula PI-1 to Chemical Formula PI-4, each of L1 to L8 comprises one of —H, —F, —Cl, —OCF 3 , —CF 3 , —CH 2 F, and —CHF 2 ,
wherein in Chemical Formula PI-1 to Chemical Formula PI-4, each of Z, Z1, and Z2 comprises one of single bond, —COO—, —OCO—, —CF 2 O—, —OCF 2 —, —CH 2 O—, —OCH 2 —, —SCH 2 —, —CH 2 S—, —CH 2 CH 2 —, —C 2 F 4 —, —CH 2 —CF 2 —, —CF 2 CH 2 —, —(CH 2 ) z — (z is 1 to 3), —CH═CH—, —CF═CF—, —CH═CF—, —CF═CH—, —C═C—, and —CH═CHCH 2 O—,
wherein in Chemical Formula PI-1 to Chemical Formula PI-4, R comprises one of hydrogen, halogen, a cyano group, alkyl group, and an alkoxy group comprising 1 to 12 carbon atoms, and
wherein dielectric anisotropy of the liquid crystal composition is in a range of 5 to 20.

8. A liquid crystal display, 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 at least one polar liquid crystal compound represented by Chemical Formula PI-1 to Chemical Formula PI-4:

wherein in Chemical Formula PI-1 to Chemical Formula PI-4:
each of n, n1, and n2 is any one of 1, 2, and 3;
each of Z, Z1, and Z2 comprises one of single bond, —COO—, —OCO—, —CF 2 O—, —OCF 2 —, —CH 2 O, —OCH 2 —, —SCH 2 —, —CH 2 S—, —CH 2 CH 2 —, —C 2 F 4 —, —CH 2 —CF 2 —, —CF 2 CH 2 —, —(CH 2 ) z — (z is 1 to 3), —CH═CH—, —CF═CF—, —CH═CF—, —CF═CH—, —C═C—, and —CH═CHCH 2 O—; and
each of L1 to L8 comprises one of —H, —F, —Cl, —OCF 3 , —CF 3 , —CH 2 F, and —CHF 2 ,
wherein in Chemical Formula PI-1 to Chemical Formula PI-4, each of A, A1, and A2 comprises one of

 and
wherein in Chemical Formula PI-1 to Chemical Formula PI-4, R comprises one of hydrogen, halogen, a cyano group, alkyl group, and an alkoxy group comprising 1 to 12 carbon atoms.

9. The liquid crystal display of claim 8 , wherein compounds represented by Chemical Formula PI-1 to Chemical Formula PI-4 comprise 1 wt % to 10 wt % of the entire liquid crystal composition.

10. The liquid crystal display of claim 8 , wherein dielectric anisotropy Δ∈ of the polar liquid crystal compounds represented by Chemical Formula PI-1 to Chemical Formula PI-4 is in a range of 10 to 30.

11. The liquid crystal display of claim 10 , wherein the liquid crystal layer further comprises at least one liquid crystal compound represented by Chemical Formula A-1 to Chemical Formula A-7:

wherein each of X and Y in Chemical Formula A-1 to Chemical Formula A-7 comprises one alkyl group comprising 1 to 5 carbon atoms.

12. The liquid crystal display of claim 11 , wherein the liquid crystal layer further comprises at least one neutral compound represented by Chemical Formula N-1 to Chemical Formula N-5:

wherein each of X and Y in Chemical Formula N-1 to Chemical Formula N-5 comprises alkyl group comprising 1 to 5 carbon atoms.

13. The liquid crystal display of claim 12 , wherein the liquid crystal display further comprises polar compounds represented by Chemical Formula P-1 to Chemical Formula P-11:

wherein each of X and Y in Chemical Formula P-1 to Chemical Formula P-11 comprises one alkyl group comprising 1 to 5 carbon atoms.

14. The liquid crystal display of claim 13 , wherein dielectric anisotropy of the liquid crystal composition in the liquid crystal layer is in a range of 5 to 20.

Assignees

• Samsung Display Co Ltd

Inventors

• Bae Ji Hong
• Oh Keun Chan

Classifications

• C09K19/32 Primary

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

• C07C13/19

  substituted by unsaturated hydrocarbon groups · CPC title

• C09K2019/0466

  the linking chain being a -CF2O- chain · CPC title

• C09K2019/123

  Ph-Ph-Ph · CPC title

• C07C2102/08

  Chemistry & Metallurgy · mapped topic