# US 2021/0332298 A1 · Liquid crystal alignment material and display panel

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- Number: US 2021/0332298 A1
- Document ID: US20210332298A1
- Status: Published application
- Kind: A1
- Application number: 16/621,699
- Filed: 2019-11-18
- Published: 2021-10-28
- Earliest claimed: 2019-07-26
- Assignees: Tcl China Star Optoelectronics Technology Co., Ltd.
- Applicants: Tcl China Star Opoelectronics Technology Co., Ltd.
- Inventors: Wei CUI
- Web page: https://patentgrep.com/patent/US20210332298A1

## CPC

- C09K 19/56: Aligning agents
- C09K 19/544: {as dispersing or encapsulating medium around the liquid crystal}
- C09K 2019/548: {stabilizing the alignment; Polymer stabilized alignment}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE

## Abstract

A liquid crystal alignment material and a display panel containing the same are provided. The liquid crystal alignment material includes an additive and pillar[n]arene. The additive includes a first group, a second group, and a third group. The second group is attached between the first group and the third group. The third group has a polarity. The pillar[n]arene includes n benzene rings and n is a positive integer. The benzene rings are bonded to each other and define a cavity. The pillar[n]arene is attached to the first group of the additive. The display panel includes the liquid crystal alignment material and a liquid crystal molecule.

## Claims

### Claim 1

A liquid crystal alignment material comprising:
an additive comprising a first group, a second group, and a third group, wherein the first group of the additive is a substituted or unsubstituted C1-8 alkyl group, the second group is attached between the first group and the third group, and the third group has a polarity; and
pillar[n]arene comprising n benzene rings, wherein n is a positive integer, the benzene rings are bonded to each other and define a cavity, and the pillar[n]arene is attached to the first group of the additive.

### Claim 2 (depends on 1)

The liquid crystal alignment material according to claim 1, wherein the second group of the additive is selected from the group consisting of phenyl, naphthyl, anthryl, phenanthryl, furyl, indolyl, pyridyl, pyrimidyl, pyrrolyl, quinolyl, and thienyl.

### Claim 3 (depends on 1)

The liquid crystal alignment material according to claim 1, wherein the additive is represented by Formula I:
wherein:
the first group is R, and the R is a substituted or unsubstituted alkyl group;
the second group is X, and the X is phenylene or cyclohexylene; and
the third group is P, and the P is a polar functional group.

### Claim 4 (depends on 1)

The liquid crystal alignment material according to claim 1, wherein the pillar[n]arene is represented by Formula II:
wherein:
R1 and R3 are alkyl;
R2 and R4 are respectively hydrogen or alkyl;
A and B are alkoxy; and
m is a positive integer, m=n−1, and m is selected from 3 to 9.

### Claim 5 (depends on 4)

The liquid crystal alignment material according to claim 4, wherein the alkoxy group of B of the pillar[n]arene to the liquid crystal alignment material is substituted by the first group of the additive.

### Claim 6 (depends on 1)

The liquid crystal alignment material according to claim 1, wherein n of pillar[n]arene is 8 to 10, and the pillar[n]arene defines two cavities.

### Claim 7

A display panel, comprising:
a liquid crystal alignment material comprising:
an additive comprising a first group, a second group, and a third group, the second group is attached between the first group and the third group, and the third group has a polarity;
pillar[n]arene comprising n benzene rings, wherein n is a positive integer, the benzene rings are bonded to each other and define a cavity, and the pillar[n]arene is attached to the first group of the additive; and
a liquid crystal molecule intercalated in the cavity of the pillar[n]arene by an intermolecular force.

### Claim 8 (depends on 7)

The display panel according to claim 7, wherein the additive is represented by Formula I:
wherein:
the first group is R, and the R is a substituted or unsubstituted alkyl group;
the second group is X, and the X is phenylene or cyclohexylene; and
the third group is P, and the P is a polar functional group.

### Claim 9 (depends on 7)

The display panel according to claim 7, wherein the liquid crystal molecule comprises a benzene ring and an alkyl chain, and the benzene ring and/or the alkyl chain of the liquid crystal molecule are assembled within the cavity of the pillar[n]arene via a π-π interaction.

### Claim 10

A liquid crystal alignment material, comprising:
an additive comprising a first group, a second group, and a third group, wherein the second group is attached between the first group and the third group, and the third group has a polarity; and
pillar[n]arene comprising n benzene rings, wherein n is a positive integer, the benzene rings are bonded to each other and define a cavity, and the pillar[n]arene is attached to the first group of the additive.

### Claim 11 (depends on 10)

The liquid crystal alignment material according to claim 10, wherein the first group of the additive is a substituted or unsubstituted C1-8 alkyl group.

### Claim 12 (depends on 10)

The liquid crystal alignment material according to claim 10, wherein the second group of the additive is selected from the group consisting of phenyl, naphthyl, anthryl, phenanthryl, furyl, indolyl, pyridyl, pyrimidyl, pyrrolyl, quinolyl, and thienyl.

### Claim 13 (depends on 10)

The liquid crystal alignment material according to claim 10, wherein the additive is represented by Formula I:
wherein:
the first group is R, and the R is a substituted or unsubstituted alkyl group;
the second group is X, and the X is phenylene or cyclohexylene; and
the third group is P, and the P is a polar functional group.

### Claim 14 (depends on 10)

The liquid crystal alignment material according to claim 10, wherein the pillar[n]arene is represented by Formula II:
wherein:
R1 and R3 are alkyl;
R2 and R4 are respectively hydrogen or alkyl;
A and B are alkoxy; and
m is a positive integer, m=n−1, and m is selected from 3 to 9.

### Claim 15 (depends on 14)

The liquid crystal alignment material according to claim 14, wherein the alkoxy group of B of the pillar[n]arene to the liquid crystal alignment material is substituted by the first group of the additive.

### Claim 16 (depends on 10)

The liquid crystal alignment material according to claim 10, wherein then of pillar[n]arene is 8 to 10, and the pillar[n]arene defines two cavities.