# US 11,078,423 B2 · Liquid crystal display device

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- Number: US 11,078,423 B2
- Document ID: US11078423B2
- Status: Granted
- Kind: B2
- Application number: 16/405,315
- Filed: 2019-05-07
- Published: 2020-05-21
- Granted: 2021-08-03
- Earliest claimed: 2018-11-20
- Assignees: Shijiazhuang Chengzhi Yonghua Display Material Co., Ltd.
- Applicants: Shijiazhuang Chengzhi Yonghua Display Material Co., ltd.
- Inventors: Jiaming Li; Zhian Liang; Guoliang Yun; Sumin Kang; Xuan Zhang
- Web page: https://patentgrep.com/patent/US11078423B2

## CPC

- C09K 19/56: Aligning agents
- C09K 19/12: at least two benzene rings directly linked, e.g. biphenyls
- C09K 19/3003: {Compounds containing at least two rings in which the different rings are directly linked (covalent bond)}
- C09K 19/3028: {in which at least two rings are linked by a carbon chain containing carbon to carbon single bonds}
- C09K 19/3066: {in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers}
- C09K 19/3098: {Unsaturated non-aromatic rings, e.g. cyclohexene rings}
- C09K 19/3402: {having oxygen as hetero atom (sugars C09K19/0422)}
- C09K 19/3491: {having sulfur as hetero atom}
- C09K 19/44: containing compounds with benzene rings directly linked
- C09K 2019/0448: {the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate}
- C09K 2019/122: {Ph-Ph}
- C09K 2019/123: {Ph-Ph-Ph}
- C09K 2019/3004: {Cy-Cy}
- C09K 2019/3009: {Cy-Ph}
- C09K 2019/301: {Cy-Cy-Ph}
- C09K 2019/3016: {Cy-Ph-Ph}
- C09K 2019/3021: {Cy-Ph-Ph-Cy}
- C09K 2019/3025: {Cy-Ph-Ph-Ph}
- C09K 2019/3027: {Compounds comprising 1,4-cyclohexylene and 2,3-difluoro-1,4-phenylene}
- C09K 2019/3036: {Cy-C2H4-Ph}
- C09K 2019/3408: {Five-membered ring with oxygen(s) in fused, bridged or spiro ring systems}
- C09K 2019/3422: {the heterocyclic ring being a six-membered ring}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

The present invention relates to a liquid crystal display device. The liquid crystal display device of the present invention comprises a first substrate, a second substrate, and a liquid crystal composition disposed between said first substrate and said second substrate, wherein said first substrate and said second substrate are disposed in parallel and opposite to each other, with the distance between said first substrate and said second substrate being 2.5 μm to 3.2 μm; alignment layers are disposed on the sides of said first and second substrates that are close to said liquid crystal composition; and said alignment layers are provided with vertical alignment films that allow liquid crystal molecules in said liquid crystal composition to be arranged roughly perpendicular to said first or second substrate.

## Claims

### Claim 1

A liquid crystal display device, comprising:
a first substrate;
a second substrate; and
a liquid crystal composition disposed between said first substrate and said second substrate,
wherein said first substrate and said second substrate are disposed in parallel and opposite to each other, with a distance between said first substrate and said second substrate being 2.5 μm to 3.2 μm;
two alignment layers are independently disposed on a side of said first and second substrates that faces to said liquid crystal composition;
said alignment layers are provided with vertical alignment films that allow liquid crystal molecules in said liquid crystal composition to be arranged roughly perpendicular to said first or second substrate; and
said liquid crystal composition comprises one or more compounds represented by formula I below, one or more compounds represented by formula II below, and one or more compounds represented by formula VI below:
wherein R0 represents an alkyl group having a carbon atom number of 1-10, an alkoxy group having a carbon atom number of 1-10, an alkenyl group having a carbon atom number of 2-10, or an alkenoxy group having a carbon atom number of 3-8, and R1 represents an alkenyl group having a carbon atom number of 2-10; and
wherein R3 and R4 each independently represent an alkyl group having a carbon atom number of 1-10, a fluorine-substituted alkyl group having a carbon atom number of 1-10, an alkoxy group having a carbon atom number of 1-10, a fluorine-substituted alkoxy group having a carbon atom number of 1-10, an alkenyl group having a carbon atom number of 2-10, a fluorine-substituted alkenyl group having a carbon atom number of 2-10, an alkenoxy group having a carbon atom number of 3-8 or a fluorine-substituted alkenoxy group having a carbon atom number of 3-8, and any one or more non-neighboring —CH2— in the groups represented by R3 and R4 are each independently optionally substituted with cyclopentylene, cyclobutylene or cyclopropylene;
wherein R9 and R10 each independently represent an alkyl group having a carbon atom number of 1-10, a fluorine-substituted alkyl group having a carbon atom number of 1-10, an alkoxy group having a carbon atom number of 1-10, a fluorine-substituted alkoxy group having a carbon atom number of 1-10, an alkenyl group having a carbon atom number of 2-10, a fluorine-substituted alkenyl group having a carbon atom number of 2-10, an alkenoxy group having a carbon atom number of 3-8 or a fluorine-substituted alkenoxy group having a carbon atom number of 3-8, and any one or more non-neighboring —CH2— groups in the groups represented by R9 and R10 are each independently optionally substituted with cyclopentylene, cyclobutylene or cyclopropylene;
X represents O, S or —CH2O—;
Z1 and Z2 each independently represent a single bond, —CH2CH2— or —CH2O—;
each independently represent 1,4-phenylene, 1,4-cyclohexylene, fluorinated 1,4-phenylene or 1,4-cyclohexenylene;
m represents 1 or 2; and
n represents 0, 1 or 2.

### Claim 2 (depends on 1)

The liquid crystal display device according to claim 1, wherein said first substrate is a color film substrate, and said second substrate is a thin film transistor substrate; and said first substrate is provided with a common electrode, and said second substrate is provided with a pixel electrode.

### Claim 3 (depends on 1)

The liquid crystal display device according to claim 1, wherein said alignment layers have a thickness of 30 nm to 120 nm.

### Claim 4 (depends on 1)

The liquid crystal display device according to claim 1, wherein the distance between said first substrate and said second substrate is 2.6 μm to 3.0 μm.

### Claim 5 (depends on 1)

The liquid crystal display device according to claim 1, wherein said vertical alignment films are thin films formed by polymerizing a polymerizable compound having a polymerizable group.

### Claim 6 (depends on 5)

The liquid crystal display device according to claim 5, wherein said polymerizable compound is selected from one or more compounds represented by formula IV:
wherein R5 and R6 each independently represent P3—Sp3-, H, Cl, F, or an alkyl having a carbon atom number of 1-12; one or more non-neighboring —CH2— groups in said alkyl having a carbon atom number of 1-12 is optionally replaced by —O—, —CH2═CH2—, —CO—, —OCO— or —COO—; wherein at least one of R5 and R6 represents P3-Sp3-;
each independently represent phenylene, a phenylene group optionally substituted with P3—Sp3-, Cl, F, an alkyl having a carbon atom number of 1-12 or an alkoxy group having a carbon atom number of 1-12, or indanyl, wherein one or two non-neighboring —CH2— groups in said alkyl having a carbon atom number of 1-12 and said alkoxy group having a carbon atom number of 1-12 are optionally replaced by —O—, —CH2═CH2—, —CO—, —OCO— or —COO—;
furthermore,
is bonded to R5 at any position of
is bonded to R6 at any position of
s represents 0, 1 or 2;
P3 represents a polymerizable group; Sp3 represents a spacer group; and
Z4 represents a single bond, —COO—, —CH2O— or —CH2CH2—.

### Claim 7 (depends on 1)

The liquid crystal display device according to claim 1, wherein said liquid crystal composition further comprises one or more compounds represented by formula III:
wherein R21 and R22 each independently represent an alkyl group having a carbon atom number of 1-10, an alkoxy group having a carbon atom number of 1-10, an alkenyl group having a carbon atom number of 2-10, or an alkenoxy group having a carbon atom number of 3-8.

### Claim 8 (depends on 1)

The liquid crystal display device according to claim 1, wherein said liquid crystal composition further comprises one or more compounds represented by formula V:
wherein R7 and R8 each independently represent an alkyl group having a carbon atom number of 1-10, an alkoxy group having a carbon atom number of 1-10, an alkenyl group having a carbon atom number of 2-10, or an alkenoxy group having a carbon atom number of 3-8;
represents
represents
where
both represent
R8 does not represent an alkenyl group.

### Claim 9 (depends on 1)

The liquid crystal display device according to claim 1, wherein said liquid crystal composition further comprises one or more compounds represented by formula VII:
wherein R11 and R12 each independently represent an alkyl group having a carbon atom number of 1-10, a fluorine-substituted alkyl group having a carbon atom number of 1-10, an alkoxy group having a carbon atom number of 1-10, a fluorine-substituted alkoxy group having a carbon atom number of 1-10, an alkenyl group having a carbon atom number of 2-10, a fluorine-substituted alkenyl group having a carbon atom number of 2-10, an alkenoxy group having a carbon atom number of 3-8 or a fluorine-substituted alkenoxy group having a carbon atom number of 3-8, and any one or more non-neighboring —CH2— groups in the groups represented by Ru and R12 are each independently optionally substituted with cyclopentylene, cyclobutylene or cyclopropylene;
each independently represent

### Claim 10 (depends on 1)

The liquid crystal display device according to claim 1, wherein said liquid crystal composition further comprises one or more compounds represented by formula VIII:
wherein R13 and R14 each independently represent an alkyl group having a carbon atom number of 1-10, a fluorine-substituted alkyl group having a carbon atom number of 1-10, an alkoxy group having a carbon atom number of 1-10, a fluorine-substituted alkoxy group having a carbon atom number of 1-10, an alkenyl group having a carbon atom number of 2-10, a fluorine-substituted alkenyl group having a carbon atom number of 2-10, an alkenoxy group having a carbon atom number of 3-8 or a fluorine-substituted alkenoxy group having a carbon atom number of 3-8:
represents
and
F1, F2 and F3 each independently represent H or F, with F2 and F3 not simultaneously being F.