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

Patent metadata

Field	Value
Publication number	US-10705369-B2
Application number	US-201816188840-A
Country	US
Kind code	B2
Filing date	Nov 13, 2018
Priority date	Nov 20, 2017
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

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 liquid crystal display device, comprising:
a substrate having first, second and third sub-pixels;
a thin film transistor in each of the first, second and third sub-pixels on the substrate;
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;
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 capsule having a first liquid crystal molecule, a first color resin and a first binder where the first liquid crystal capsule and the first color resin are dispersed;
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 capsule having a second liquid crystal molecule, a second color resin and a second binder where the second liquid crystal capsule and the second color resin are dispersed; 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 capsule having a third liquid crystal molecule, a third color resin and a third binder where the third liquid crystal capsule and the third color resin are dispersed,
wherein the first, second and third liquid crystal molecules have different refractive index anisotropies from one another.

2. The display device of claim 1 , wherein the refractive index anisotropies of the first, second and third liquid crystal molecules are proportional to a wavelength of color corresponding to the first, second and third sub-pixels, respectively.

3. The display device of claim 1 , wherein the first, second and third sub-pixels correspond to red, green and blue colors, respectively.

4. The display device 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.

5. The display device of claim 4 , wherein the capsule reactor is —NH or —OH, and the substrate reactor is —CH 2 ═CH 2 , OH or —NH 2 .

6. A liquid crystal display device including a substrate where first, second and third sub-pixels are defined, comprising:
a first liquid crystal pattern disposed in the first sub-pixel and including a first liquid crystal capsule having a first liquid crystal molecule having a first refractive index anisotropy, a first color resin and a first binder where the first liquid crystal capsule and the first color resin are dispersed;
a second liquid crystal pattern disposed in the second sub-pixel and the second liquid crystal pattern including a second liquid crystal capsule having a second liquid crystal molecule having a second refractive index anisotropy, a second color resin and a second binder where the second liquid crystal capsule and the second color resin are dispersed; and
a third liquid crystal pattern disposed in the third sub-pixel and the third liquid crystal pattern including a third liquid crystal capsule having a third liquid crystal molecule having a third refractive index anisotropy, a third color resin and a third binder where the third liquid crystal capsule and the third color resin are dispersed,
wherein the first, second and third refractive index anisotropies are different from one other to reduce deviation in normalized transmittance by color and dispersity in a wavelength of color.

7. The display device of claim 6 , wherein the first, second and third refractive index anisotropies are proportional to the wavelength of color corresponding to the first, second and third sub-pixels, respectively.

8. The display device of claim 6 , wherein the first, second and third sub-pixels correspond to red, green and blue colors, respectively.

9. The display device of claim 6 , 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.

10. The display device of claim 9 , wherein the capsule reactor is —NH or —OH, and the substrate reactor is —CH 2 ═CH 2 , OH or —NH 2 .

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