# US 11,441,072 B2 · Liquid crystal composition, liquid crystal display element, and liquid crystal display

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- Number: US 11,441,072 B2
- Document ID: US11441072B2
- Status: Granted
- Kind: B2
- Application number: 17/251,041
- Filed: 2020-04-03
- Published: 2021-09-30
- Granted: 2022-09-13
- Earliest claimed: 2019-12-30
- Assignees: Shijiazhuang Chengzhi Yonghua Display Material Co., Ltd.
- Applicants: Shijiazhuang Chengzhi Yonghua Display Material Co., Ltd.
- Inventors: Wei Zhang; Sumin Kang; Xiaolong Wang; YunXia Qiao; Qing Cui; Gang Wen
- Web page: https://patentgrep.com/patent/US11441072B2

## CPC

- C09K 19/3003: {Compounds containing at least two rings in which the different rings are directly linked (covalent bond)}
- C09K 19/3098: {Unsaturated non-aromatic rings, e.g. cyclohexene rings}
- C09K 19/12: at least two benzene rings directly linked, e.g. biphenyls
- C09K 19/3066: {in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers}
- C09K 19/3405: {the heterocyclic ring being a five-membered ring}
- C09K 19/3491: {having sulfur as hetero atom}
- G02F 1/1333: Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence)
- C09K 2019/122: {Ph-Ph}
- C09K 2019/123: {Ph-Ph-Ph}
- C09K 2019/3004: {Cy-Cy}
- C09K 2019/301: {Cy-Cy-Ph}
- C09K 2019/3016: {Cy-Ph-Ph}
- C09K 2019/3027: {Compounds comprising 1,4-cyclohexylene and 2,3-difluoro-1,4-phenylene}
- C09K 2019/3408: {Five-membered ring with oxygen(s) in fused, bridged or spiro ring systems}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## 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.

## Claims

### Claim 1

A dielectric negative liquid crystal composition, comprising a compound of formula I, a compound of formula II, three different compounds of formula III, one or more compounds of formula IV, a compound of formula VII-3, and two different compounds of formula IX-1:
wherein R1 represents an alkyl group having a carbon atom number of 3-4;
R2 represents an alkoxy group having a carbon atom number of 2-3;
R3 and R4 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;
R13 represents an alkyl group having a carbon atom number of 2-3;
R14 represents an alkoxy group having a carbon atom number of 2;
m represents 1;
a mass content of the compound represented by formula I is 35.5-36%, a mass content of compound represented by formula II is 4.5-7%, a mass content of the compounds represented by formula III is 20%, a mass content of the compounds represented by formula IV is 5-8%, a mass content of the compound represented by formula VII-3 is 10-12%, and a mass content of the compounds represented by formula IX-1 is 17%.

### Claim 2 (depends on 1)

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-3.

### Claim 3 (depends on 1)

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, IV-3 and IV-5:
wherein R31 and R41 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.

### Claim 4 (depends on 1)

The liquid crystal composition according to claim 1, wherein the liquid crystal composition further comprises one or more compounds of formula V:
wherein R5 and R6 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

### Claim 5 (depends on 1)

The liquid crystal composition according to claim 1, wherein the liquid crystal composition further comprises one or more compounds of formula VI:
wherein R7 and R8 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;
X1 and Y1 each independently represent H or F.

### Claim 6 (depends on 1)

The liquid crystal composition according to claim 1, wherein the liquid crystal composition further comprises one or more compounds of formula VIII:
wherein R11 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 CH2 may be substituted with cyclopentyl, cyclobutyl or cyclopropyl;
R12 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.

### Claim 7 (depends on 1)

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 R15 and R16 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

### Claim 8 (depends on 1)

A liquid crystal di splay 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.