Liquid crystal material, liquid crystal display panel and manufacture method of liquid crystal display panel

• US 10,151,951 B2
• Filed: 05/18/2016
• Issued: 12/11/2018
• Est. Priority Date: 04/07/2016
• Status: Active Grant

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Lan, Song
• Primary Examiner(s): Zhang, Ruiyun
• Application Number:
  US15/039,419
• Publication Number:
  US 20180120650A1
• Time in Patent Office: 937 Days
• Field of Search: 428 11, 428 12, 428 13, 430 20, 349117, 349118
• CPC Class Codes: C09K 19/56 Aligning agents
• CPC Class Codes: C09K 2019/0444 characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group
• CPC Class Codes: C09K 2323/00 Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
• CPC Class Codes: C09K 2323/02 Alignment layer characterised by chemical composition
• CPC Class Codes: C09K 2323/03 Viewing layer characterised by chemical composition
• CPC Class Codes: G02F 1/133703 by introducing organic surfactant additives into the liquid crystal material
• CPC Class Codes: G02F 1/133742 for homeotropic alignment
• CPC Class Codes: G02F 1/133788 by light irradiation, e.g. linearly polarised light photo-polymerisation
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells

Abstract

Disclosed are a liquid crystal material, a liquid crystal display panel and a manufacture method of a liquid crystal display panel. The liquid crystal material comprises liquid crystal molecules, and photosensitive vertical alignment material mixed thereamong, and the photosensitive vertical alignment material comprises a head group A, a middle base group Sp, a photosensitive base group B and a tail group R. The head group A is anchored on the substrate so that the entire molecules are aligned perpendicular with the substrate, and a photo reaction takes place to the photosensitive base group B by being irradiated with the ultraviolet light from the tilted direction, which leads to the alignment direction change of the entire molecules to be aligned on the substrate with a certain tilted angle according to the irradiation direction of the ultraviolet light. The liquid crystal molecules at the surfaces of the substrate have a pre-tilted angle.

Claims

1. A liquid crystal material, comprising liquid crystal molecules, and photosensitive vertical alignment material mixed among the liquid crystal molecules, and

the photosensitive vertical alignment material is A-Sp-B-Sp-R, wherein

A is a polar groups containing one or more of N, S, O and Si atoms;

Sp is —

CH═

CH—

, —

C≡

C—

, phenyl, cycloalkyl, —

O—

, —

S—

, —

CO—

, —

CO—

O—

, —

OCO—

, —

CH₂S—

, —

CF₂O—

, —

OCF₂—

, —

CF₂S—

, —

(CH₂)_n—

, an alkylene group —

(CH₂)_n—

having one or more CH₂ being replaced by a phenyl, a hexamethylene, or a cycloalkyl, or an alkylene group having one or more H atom being replaced by a F atom, wherein n is 1, 2, 3 or 4;

B is one or more photosensitive groups, and a constitutional formula of the photosensitive group is

2. The liquid crystal material according to claim 1, wherein the group A is —

OH or —

NHR.

3. The liquid crystal material according to claim 1, wherein a mass percentage of the photosensitive vertical alignment material in the liquid crystal material is 1 wt %-5 wt %.

4. A liquid crystal display panel, comprising an upper substrate and a lower substrate which are oppositely located, and a liquid crystal layer arranged between the upper substrate and the lower substrate;

wherein the liquid crystal layer comprising the liquid crystal material according to claim 1.