Liquid crystal composition, liquid crystal display element, and liquid crystal display

Patent metadata

Field	Value
Publication number	US-2021301205-A1
Application number	US-202017251041-A
Country	US
Kind code	A1
Filing date	Apr 3, 2020
Priority date	Dec 30, 2019
Publication date	Sep 30, 2021
Grant date	—

Abstract

A dielectric negative liquid crystal composition, a liquid crystal display element and a liquid crystal display containing the liquid crystal composition belong to the field of liquid crystal display. The liquid crystal composition of the present disclosure includes a compound represented by formula I, a compound represented by formula II, two or more compounds represented by formula III and one or more compounds represented by formula IV. The liquid crystal composition of the present invention has high dielectric anisotropy, high elastic constant K, low rotational viscosity, can be used to develop large dielectric, fast response liquid crystal display elements or liquid crystal displays.

First claim

1 . A dielectric negative liquid crystal composition, comprising a compound of formula I, a compound of formula II, two or more compounds of formula III, and one or more compounds of formula IV:

wherein R 1 , R 2 , R 3 and R 4 each independently represent an alkyl group having a carbon atom number of 1-5, a fluoro-substituted alkyl group having a carbon atom number of 1-5, an alkoxy group having a carbon atom number of 1-5, or a fluoro-substituted alkoxy group having a carbon atom number of 1-5;
any one or more non-connected CH 2 in R 1 , R 2 , R 3 and R 4 may be substituted with cyclopentyl, cyclobutyl or cyclopropyl;
m represents 1 or 2.

2 . The liquid crystal composition according to claim 1 , wherein the compound of formula III is selected from the group consisting of compounds of formula III-1 to III-9:

3 . The liquid crystal composition according to claim 1 , wherein the compound of formula IV is selected from the group consisting of compounds of formula IV-1 to IV-6:

wherein R 31 and R 41 each independently represent an alkyl group having a carbon atom number of 1-5 or an alkoxy group having a carbon atom number of 1-5.

4 . The liquid crystal composition according to claim 1 , wherein the liquid crystal composition further comprises one or more compounds of formula V:

wherein R 5 and R 6 each independently represent an alkyl group having a carbon atom number of 1-5, an alkoxy group having a carbon atom number of 1-5, or an alkenyl group having a carbon atom number of 2-5;

represents

5 . The liquid crystal composition according to claim 1 , wherein the liquid crystal composition further comprises one or more compounds of formula VI:

wherein R 7 and R 8 each independently represent an alkyl group having a carbon atom number of 1-5, an alkoxy group having a carbon atom number of 1-5, or an alkenyl group with having a carbon atom number of 2-5;
X 1 and Y 1 each independently represent H or F.

6 . The liquid crystal composition according to claim 1 , wherein the liquid crystal composition further comprises one or more compounds of formula VII:

wherein R 9 and R 10 each independently represent an alkyl group having a carbon atom number of 1-5, an alkoxy group having a carbon atom number of 1-5, or an alkenyl group with having a carbon atom number of 2-5.

7 . The liquid crystal composition according to claim 1 , wherein the liquid crystal composition further comprises one or more compounds of formula VIII:

wherein R 11 represents an alkyl group having a carbon atom number of 1-5, an alkoxy group having a carbon atom number of 1-5, or an alkenyl group having a carbon atom number of 2-5, any one or more non-connected CH 2 may be substituted with cyclopentyl, cyclobutyl or cyclopropyl;
R 12 represents an alkyl group having a carbon atom number of 1-5, an alkoxy group having a carbon atom number of 1-5, or an alkenyl group having a carbon atom number of 2-5;
W represents O or S.

8 . The liquid crystal composition according to claim 1 , wherein the liquid crystal composition further comprises one or more compounds of formula IX:

wherein R 13 and R 14 each independently represent an alkyl group having a carbon atom number of 1-5, an alkoxy group having a carbon atom number of 1-5, or an alkenyl group having a carbon atom number of 2-5;

represents

X 2 represents H or F.

9 . The liquid crystal composition according to claim 1 , wherein the liquid crystal composition further comprises one or more compounds of formula X other than the compounds of formula I and formula II:

wherein R 15 and R 16 each independently represent an alkyl group having a carbon atom number of 1-5, an alkoxy group having a carbon atom number of 1-5, or an alkenyl group having a carbon atom number of 2-5;

each independently represent

10 . A liquid crystal display element or liquid crystal display, wherein the liquid crystal display element or liquid crystal display comprises the liquid crystal composition of claim 1 , the liquid crystal display element or liquid crystal display is an active matrix display element or display or a passive matrix display element or display.

Assignees

• Shijiazhuang Chengzhi Yonghua Display Materials Co Ltd

Inventors

• Zhang Wei
• Kang Sumin
• Wang Xiaolong
• Qiao Yunxia
• Cui Qing
• Wen Gang

Classifications

• C09K2019/3408

  Five-membered ring with oxygen(s) in fused, bridged or spiro ring systems · 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

• C09K2019/3004

  Cy-Cy · CPC title