LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE INCLUDING THE SAME

• US 20170292074A1
• Filed: 01/06/2017
• Published: 10/12/2017
• Est. Priority Date: 04/08/2016
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: BAE, Ji Hong, OH, Keun Chan, LEE, Seul Gee
• Granted Patent: US 10,640,708 B2
• Time in Patent Office: Days
• CPC Class Codes: C07D 307/80 Radicals substituted by oxygen atoms
• CPC Class Codes: C09K 19/3066 in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
• CPC Class Codes: C09K 19/32 containing condensed ring systems, i.e. fused, bridged or spiro ring systems
• CPC Class Codes: C09K 19/56 Aligning agents
• CPC Class Codes: C09K 2019/122 Ph-Ph
• CPC Class Codes: C09K 2019/124 Ph-Ph-Ph-Ph
• CPC Class Codes: C09K 2019/3004 Cy-Cy
• CPC Class Codes: C09K 2019/3009 Cy-Ph
• CPC Class Codes: C09K 2019/301 Cy-Cy-Ph
• CPC Class Codes: C09K 2019/3016 Cy-Ph-Ph
• CPC Class Codes: C09K 2019/3408 Five-membered ring with oxygen(s) in fused, bridged or spiro ring systems
• CPC Class Codes: G02F 1/133723 Polyimide, polyamide-imide
• CPC Class Codes: G02F 1/133726 made of a mesogenic material
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence

Abstract

A liquid crystal composition, comprising, at least one compound represented by Formula 1-A:

wherein, in the Formula 1-A, R—*, R¹—*, Q—*, *—Z1-*, *—Z2-*,

n1, n2, n3, n4, L1-*, L2-*, L3-*, L4-*, L5-*, L6-*, L7-*, and L8-* are the same as defined in the specification, and * is defined as a bonding site to a neighboring atom.

Claims

1. A liquid crystal composition, comprising:

at least one compound represented by Formula 1-A;

2. The liquid crystal composition of claim 1, wherein

Q—

* is *—

H, and

n4 is an integer of 1.

3. The liquid crystal composition of claim 1, wherein

Q—

* is *—

H, and

n3 is an integer of 2.

4. The liquid crystal composition of claim 1, wherein

5. The liquid crystal composition of claim 1, wherein the at least one compound represented by Formula 1-A is a compound represented by Formula 1-B:

6. The liquid crystal composition of claim 1,

wherein the at least one compound represented by Formula 1-A is a compound represented by Formulae 1-1 to 1-4:

7. The liquid crystal composition of claim 1, further comprising:

at least one compound represented by Formulae 2-1 to 2-17;

8. The liquid crystal composition of claim 7,

wherein the content of at least one of compound represented by Formula P is 0 percent by weight:

9. The liquid crystal composition of claim 7,

wherein the liquid crystal composition has a refractive index anisotropy (Δ

n) of 0.08 to 0.12, a dielectric anisotropy (Δ

ε

) of −

2.8 to −

5.5, and a rotational viscosity (γ

1, 20°

C.) of 70 millipascal seconds (mPa·

s) to 140 millipascal seconds (mPa·

s).

10. The liquid crystal composition of claim 1, wherein the content of the at least one compound represented by Formula 1-A is about 1 percent by weight to about 10 percent by weight based on the total weight of the liquid crystal composition.

11. The liquid crystal composition of claim 1, further comprising at least one reactive mesogen represented by Formula RM:

P1-SP1-MG—

SP2-P2  

 

Formula RM

wherein, in the Formula RM,

P1-* and P2-* are the same or different and are each independently

12. A liquid crystal display device, comprising:

a display substrate comprising a first base substrate, a switching element disposed on the first base substrate, and a first electrode disposed on the switching element;

a counter display substrate comprising a second base substrate and a second electrode disposed on the second base substrate and facing the display substrate; and

a liquid crystal layer comprising at least one compound represented by Formula 1-A and at least one reactive mesogen represented by Formula RM, wherein the liquid crystal layer is disposed between the display substrate and the counter display substrate;

13. The liquid crystal display device of claim 12, wherein

Q—

* is *—

H, and

n4 is an integer of 1.

14. The liquid crystal display device of claim 12, wherein

Q—

* is *—

H, and

n3 is an integer of 2.

15. The liquid crystal display device of claim 12, wherein

16. The liquid crystal display device of claim 12, wherein the at least one compound represented by Formula 1-A is a compound represented by Formula 1-B:

17. The liquid crystal display device of claim 12, further comprising:

a liquid crystal alignment layer comprising a polymer of the reactive mesogen,

wherein the liquid crystal alignment layer is disposed between the liquid crystal layer and at least one of the display substrate and the counter display substrate.

18. The liquid crystal display device of claim 12,

wherein the at least one compound represented by Formula 1-A is a compound represented by Formulae 1-1 to 1-4:

19. The liquid crystal display device of claim 12,

wherein the liquid crystal layer further comprises at least one compound represented by Formulae 2-1 to 2-17:

20. The liquid crystal display device of claim 19,

wherein the content of at least one compound represented by Formula P is 0 percent by weight:

21. The liquid crystal display device of claim 12, wherein the content of the at least one compound represented by Formula 1-A is about 1 percent by weight to about 10 percent by weight based on the total weight of the liquid crystal layer.