Liquid crystal display device including liquid crystal capsule and method of fabricating the same

Patent metadata

Field	Value
Publication number	US-10908447-B2
Application number	US-202016858398-A
Country	US
Kind code	B2
Filing date	Apr 24, 2020
Priority date	Nov 20, 2017
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

A liquid crystal display device including: a substrate; a thin film transistor on the substrate; a pixel electrode and a common electrode on the substrate; a first liquid crystal pattern in the first sub-pixel on the pixel electrode and the common electrode, the first liquid crystal pattern including a first liquid crystal molecule; a second liquid crystal pattern in the second sub-pixel on the pixel electrode and the common electrode, the second liquid crystal pattern including a second liquid crystal molecule; and a third liquid crystal pattern in the third sub-pixel on the pixel electrode and the common electrode, the third liquid crystal pattern including a third liquid crystal molecule, wherein the first, second and third liquid crystal molecules have different refractive index anisotropies from each other.

First claim

What is claimed is:

1. A method of fabricating a liquid crystal display device, comprising:
forming a thin film transistor in each of first, second and third sub-pixels on a substrate;
forming a pixel electrode and a common electrode in each of the first, second and third sub-pixels on the substrate, the pixel electrode and the common electrode spaced apart from each other;
forming a first liquid crystal pattern in the first sub-pixel on the pixel electrode and the common electrode by selectively irradiating an ultraviolet ray onto a first liquid crystal capsule solution of the first sub-pixel of the substrate in the first liquid crystal capsule solution including a first liquid crystal capsule, a first color resin, a first binder and a photoinitiator;
forming a second liquid crystal pattern in the second sub-pixel on the pixel electrode and the common electrode by selectively irradiating an ultraviolet ray onto a second liquid crystal capsule solution of the second sub-pixel of the substrate in the second liquid crystal capsule solution including a second liquid crystal capsule, a second color resin, a second binder and the photoinitiator; and
forming a third liquid crystal pattern in the third sub-pixel on the pixel electrode and the common electrode by selectively irradiating an ultraviolet ray onto a third liquid crystal capsule solution of the third sub-pixel of the substrate in the third liquid crystal capsule solution including a third liquid crystal capsule, a third color resin, a third binder and the photoinitiator,
wherein the first, second and third liquid crystal capsules include first, second and third liquid crystal molecules, respectively, and
wherein the first, second and third liquid crystal molecules have different refractive index anisotropies from one another.

2. The method of claim 1 , wherein a curing reaction occurs between the first liquid crystal capsule and the first color resin by irradiation of the ultraviolet ray in the forming the first liquid crystal pattern,
wherein a curing reaction occurs between the second liquid crystal capsule and the second color resin by irradiation of the ultraviolet ray in the forming the second liquid crystal pattern, and
wherein a curing reaction occurs between the third liquid crystal capsule and the third color resin by irradiation of the ultraviolet ray in the forming the third liquid crystal pattern.

3. The method of claim 1 , wherein a capsule reactor for polymerization of the first, second and third liquid crystal capsules and the first, second and third color resins is combined at an outer shell of the each of the first, second and third liquid crystal capsules, and
wherein a substrate reactor for adsorption of the polymerized first, second and third liquid crystal capsules and the first, second and third color resins is combined at a surface of the substrate.

4. The method of claim 3 , wherein the capsule reactor is —NH or —OH, and the substrate reactor is —CH2=CH2, OH or —NH2.

5. The method of claim 1 , wherein forming the first liquid crystal pattern comprises:
immersing the substrate in the first liquid crystal capsule solution; and
selectively irradiating the ultraviolet ray onto the first liquid crystal capsule solution of the first sub-pixel such that the first liquid crystal capsule and the first color resin are adsorbed to the substrate in the first sub-pixel,
wherein forming the second liquid crystal pattern comprises:
immersing the substrate in the second liquid crystal capsule solution; and
selectively irradiating the ultraviolet ray onto the second liquid crystal capsule solution of the second sub-pixel such that the second liquid crystal capsule and the second color resin are adsorbed to the substrate in the second sub-pixel, and
wherein forming the third liquid crystal pattern comprises:
immersing the substrate in the third liquid crystal capsule solution; and
selectively irradiating the ultraviolet ray onto the third liquid crystal capsule solution of the third sub-pixel such that the third liquid crystal capsule and the third color resin are adsorbed to the substrate in the third sub-pixel.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Eun-Woo
• Choi Min-Geun

Classifications

• C09K19/04

  characterised by the chemical structure of the liquid crystal components {, e.g. by a specific unit} · CPC title

• G02F1/1341

  Filling or closing of cells · CPC title

• G02F1/137

  characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering · CPC title

• G02F1/13415

  Drop filling process · CPC title

• G02F1/1334 Primary

  based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals · CPC title