Liquid crystal composition and liquid crystal display including the same

Patent metadata

Field	Value
Publication number	US-2016200976-A1
Application number	US-201514806843-A
Country	US
Kind code	A1
Filing date	Jul 23, 2015
Priority date	Jan 12, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

A liquid crystal composition includes a first class including a first compound represented by Chemical Formula 1, wherein the first compound is 13 to 18 parts by weight based on 100 parts by weight of the total liquid crystal composition, and a second compound represented by Chemical Formula 2, wherein the second compound is 8 to 13 parts by weight based on 100 parts by weight of the total liquid crystal composition, a second class including a third compound represented by Chemical Formula 3. Chemical Formulas 1, 2, and 3 are represented by:

and
wherein R and R′ are, independently of each other, a hydrogen atom, or an unsubstituted or substituted C1 to C7 alkyl group.

First claim

What is claimed is:

1 . A liquid crystal composition, comprising:
a first class comprising:
a first compound represented by Chemical Formula 1, wherein the first compound is 13 to 18 parts by weight based on 100 parts by weight of the total liquid crystal composition; and
a second compound represented by Chemical Formula 2, wherein the second compound is 8 to 13 parts by weight based on 100 parts by weight of the total liquid crystal composition; and
a second class comprising:
a third compound represented by Chemical Formula 3,
wherein Chemical Formulas 1, 2, and 3 are represented by:

and
wherein R and R′ are, independently of each other, a hydrogen atom, or an unsubstituted or substituted C1 to C7 alkyl group.

2 . The liquid crystal composition of claim 1 , wherein:
the third compound is 10 to 15 parts by weight based on 100 parts by weight of the total liquid crystal composition.

3 . The liquid crystal composition of claim 1 , wherein the first class further comprises:
a fourth compound represented by Chemical Formula 4:

wherein R is a hydrogen atom, or an unsubstituted or substituted C1 to C7 alkyl group.

4 . The liquid crystal composition of claim 3 , wherein:
the fourth compound is 8 to 13 parts by weight based on 100 parts by weight of the total liquid crystal composition.

5 . The liquid crystal composition of claim 3 , wherein the second class further comprises a fifth compound represented by Chemical Formula 5:

wherein R and R′ are, independently of each other, a hydrogen atom, or an unsubstituted or substituted C1 to C7 alkyl group.

6 . The liquid crystal composition of claim 5 , wherein:
the fifth compound is 5 to 10 parts by weight based on 100 parts by weight of the total liquid crystal composition.

7 . The liquid crystal composition of claim 5 , wherein the second class further comprises:
a sixth compound represented by following Chemical Formula 6:

wherein R and R′ are, independently of each other, a hydrogen atom, or an unsubstituted or substituted C1 to C7 alkyl group.

8 . The liquid crystal composition of claim 7 , wherein:
the sixth compound is 5 to 10 parts by weight based on 100 parts by weight of the total liquid crystal composition.

9 . The liquid crystal composition of claim 1 , further comprising:
a seventh compound represented by Chemical Formula 7:

10 . The liquid crystal composition of claim 9 , wherein:
the seventh compound is 0.1 to 0.5 parts by weight based on 100 parts by weight of the liquid crystal composition.

11 . The liquid crystal composition of claim 1 , having an elastic modulus K33 of 15.5 pN to 17.0 pN when a phase difference of a panel (Δn*d) is 310 nm to 340 nm and satisfying Equation 1:
6.3≦rotational viscosity (γ1)/elastic modulus K 33≦6.7  (Equation 1).

12 . The liquid crystal composition of claim 11 , further having a refractive anisotropy Δn of 0.107 to 0.111, a dielectric anisotropy (Δ∈) of −3.4 to −3.0, and an elastic modulus K11 of 12.8 pN to 15.8 pN.

13 . The liquid crystal composition of claim 1 , having an elastic modulus K33 of 15.5 pN to 17.0 pN when a phase difference of a panel (Δn*d) is 345 nm to 365 nm and satisfying Equation 2:
5.6≦rotational viscosity (γ1)/elastic modulus K 33≦6.0  (Equation 2).

14 . The liquid crystal composition of claim 1 , satisfying Equation 3:
4.5≦elastic modulus K 33/|dielectric anisotropy (Δ∈)|≦5.5  (Equation 3).

15 . A liquid crystal display comprising:
a first substrate; a second substrate facing the first substrate; an electric field generating an electrode formed on at least one of the first substrate and the second substrate; and a liquid crystal layer comprising liquid crystal molecules injected between the first substrate and the second substrate, wherein the liquid crystal molecules comprise the liquid crystal composition of claim 1 .

16 . The liquid crystal display of claim 15 , wherein:
the first class further comprises a fourth compound represented by Chemical Formula 4:

wherein R is a hydrogen atom, or an unsubstituted or substituted C1 to C7 alkyl group.

17 . The liquid crystal display of claim 16 , wherein:
the second class further comprises a fifth compound represented by Chemical Formula 5:

wherein R and R′ are, independently of each other, a hydrogen atom, or an unsubstituted or substituted C1 to C7 alkyl group.

18 . The liquid crystal display of claim 17 , wherein:
the second class further comprises a sixth compound represented by Chemical Formula 6:

wherein R and R′ are, independently of each other, a hydrogen atom, or an unsubstituted or substituted C1 to C7 alkyl group.

19 . The liquid crystal display of claim 15 , having an elastic modulus K33 of 15.5 pN to 17.0 pN when a phase difference of a panel (Δn*d) is 345 nm to 365 nm and satisfying Equation 2:
5.6≦rotational viscosity (γ1)/elastic modulus K 33≦6.0  (Equation 2).

20 . The liquid crystal display of claim 15 , satisfying Equation 3:
4.5≦elastic modulus K 33/|dielectric anisotropy (Δ∈)|≦5.5  (Equation 3).

Assignees

• Samsung Display Co Ltd

Inventors

• Jeong Kang Seob
• Tak Kyung Seon
• Kim Min-Hee
• Lee Kyung Hee
• Kwon Sun Young
• Park Joon-Hyung
• Bae Ji Hong
• Son Jong Ho
• Oh Keun Chan

Classifications

• G02F1/1341

  Filling or closing of cells · CPC title

• C09K2019/3009

  Cy-Ph · CPC title

• C09K2019/3004

  Cy-Cy · CPC title

• C09K19/3003 Primary

  Compounds containing at least two rings in which the different rings are directly linked (covalent bond) · CPC title

• G02F1/1333

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title