Liquid crystal composition and liquid crystal display element

• US 20040108488A1
• Filed: 12/02/2003
• Published: 06/10/2004
• Est. Priority Date: 12/04/2002
• Status: Active Grant

• Current Assignee: JNC Petrochemical Corporation (Chisso Corporation)
• Original Assignee: Chisso Corporation
• Inventors: Tomi, Yoshitaka, Okabe, Eiji
• Granted Patent: US 6,887,532 B2
• Time in Patent Office: Days
• US Class Current: 252/299.63
• CPC Class Codes: C09K 19/42 Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
• CPC Class Codes: C09K 2019/0466 the linking chain being a -CF2O- chain
• CPC Class Codes: C09K 2019/3004 Cy-Cy
• CPC Class Codes: C09K 2019/301 Cy-Cy-Ph
• CPC Class Codes: C09K 2019/3016 Cy-Ph-Ph
• CPC Class Codes: C09K 2323/00 Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition

Abstract

A liquid crystal composition including three components, optionally four components, selected from the compounds (1-1) to (3-3) is provided. The composition has plural characteristics, i.e., a wide temperature range of a nematic phase, a low viscosity, a suitable optical anisotropy, and a large dielectric anisotropy, in a properly balanced manner. The invention further provides a liquid crystal display element including the composition.

Claims

1. A liquid crystal composition comprising at least one compound selected from the group of compounds represented by formulas (1-1), (1-2), and (1-3) as a first component, at least one compound selected from the group of compounds represented by formula (2) as a second component, and at least one compound selected from the group of compounds represented by formulas (3-1), (3-2), and (3-3) as a third component:

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

3. The liquid crystal composition according to claim 1, wherein the first component is at least one compound selected from the group of compounds represented by formula (1-1) and at least one compound selected from the group of compounds represented by formula (1-2).

4. The liquid crystal composition according to claim 1, wherein the first component is at least one compound selected from the group of compounds represented by formula (1-1) and at least one compound selected from the group of compounds represented by formula (1-3).

5. The liquid crystal composition according to claim 1, wherein the first component is at least one compound selected from the group of compounds represented by formula (1-1), at least one compound selected from the group of compounds represented by formula (1-2), and at least one compound selected from the group of compounds represented by formula (1-3).

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

7. The liquid crystal composition according to claim 1, wherein the first component is at least one compound selected from the group of compounds represented by formula (1-2) and at least one compound selected from the group of compounds represented by formula (1-3).

8. The liquid crystal composition according to claim 1, wherein the first component is at least one compound selected from the group of compounds represented by formula (1-3).

9. The liquid crystal composition according to claim 1 which comprises from 5 to 50% by weight of the first component, from 5 to 40% by weight of the second component, and from 10 to 70% by weight of the third component, each based on the total weight of the composition.

10. The liquid crystal composition according to claim 1 which further comprises at least one compound selected from the group of compounds represented by formulas (4-1), (4-2), (4-3), and (4-4) as a fourth component:

11. The liquid crystal composition according to claim 9 which further comprises at least one compound selected from the group of compounds represented by formulas (4-1), (4-2), (4-3), and (4-4) as a fourth component:

12. The liquid crystal composition according to claim 10 which comprises from 1 to 50% by weight of the fourth component, based on the total weight of the composition.

13. The liquid crystal composition according to claim 11 which comprises from 1 to 50% by weight of the fourth component, based on the total weight of the composition.

14. A liquid crystal display element comprising the liquid crystal composition according to any one of claims 1 to 13.

15. The liquid crystal display element according to claim 14, wherein the liquid crystal display element is an AM element of an IPS mode.