Polarizing plate, liquid crystal display device having the same and method of fabricating the polarizing plate

Patent metadata

Field	Value
Publication number	US-9915759-B2
Application number	US-201514735316-A
Country	US
Kind code	B2
Filing date	Jun 10, 2015
Priority date	Jun 12, 2014
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

A polarizing plate, a liquid crystal display device having the polarizing plate and a method of fabricating the polarizing plate are characterized by forming an anti-glare/reflection layer, which is formed into a single layer through one coating process using a phase separation resulting from a weight difference between polymer beads and air bubbles. This may result in ensuring cost competitiveness.

First claim

What is claimed is:

1. A polarizing plate, comprising:
a passivation layer on at least one surface of a base; and
an anti-glare/reflection layer configured as a single layer on an outer surface of the passivation layer, the anti-glare/reflection layer comprising polymer beads in a lower portion thereof, and air bubbles between a middle portion and a surface thereof,
wherein the polymer beads and air bubbles are formed separately, and the air bubbles are formed on the polymer beads.

2. The polarizing plate of claim 1 , wherein the anti-glare/reflection layer comprises the polymer beads and the air bubbles within a photocurable resin.

3. The polarizing plate of claim 1 , wherein the polymer beads and the air bubbles have spherical shapes, and the surface of the anti-glare/reflection layer has a concave-convex shape.

4. The polarizing plate of claim 1 , wherein the polymer bead is made of polymer having a refractive index in the range of 1.55 to 1.8.

5. The polarizing plate of claim 1 , wherein the polymer bead has a diameter in the range of 3 μm to 6 μm, and the air bubble has a diameter in the range of 1 nm to 300 nm.

6. The polarizing plate of claim 1 , wherein the air bubbles are arranged in a manner that density thereof gradually increases from the middle portion toward the surface.

7. The polarizing plate of claim 1 , wherein the air bubbles are arranged in a manner that diameters thereof gradually increase from the middle portion toward the surface.

8. A liquid crystal display device, comprising:
a liquid crystal panel; and
a polarizing plate on at least one surface of the liquid crystal panel, wherein the polarizing plate comprises a passivation layer on at least one surface of a base, and an anti-glare/reflection layer configured as a single layer on an outer surface of the passivation layer, the anti-glare/reflection layer comprising polymer beads in a lower portion thereof, and air bubbles between a middle portion and a surface thereof,
wherein the polymer beads and air bubbles are formed separately, and the air bubbles are formed on the polymer beads.

9. The liquid crystal display device of claim 8 , the anti-glare/reflection layer comprises the polymer beads and the air bubbles within a photocurable resin.

10. The liquid crystal display device of claim 8 , wherein the air bubbles are arranged in a manner that density thereof gradually increases from the middle portion toward the surface.

11. The liquid crystal display device of claim 8 , wherein the air bubbles are arranged in a manner that diameters thereof gradually increase from the middle portion toward the surface.

12. A liquid crystal display device, comprising:
a liquid crystal panel;
a polarizing plate on the liquid crystal panel; and
an anti-glare/reflection layer on the polarizing plate configured as a single layer, wherein the anti-glare/reflection layer includes polymer beads and air bubbles,
wherein the polymer beads and air bubbles are formed separately, and the air bubbles are formed on the polymer beads, and
wherein a density of the air bubbles configured to increase from a middle portion of the anti-glare/reflection layer to an upper portion of the anti-glare/reflection layer.

13. The liquid crystal display device of claim 12 , wherein diameters of the air bubbles are configured to increase from the middle portion of the anti-glare/reflection layer to the upper portion of the anti-glare/reflection layer.

14. The liquid crystal display device of claim 12 , wherein the air bubbles are configured to locate between the middle portion of the anti-glare/reflection layer and the upper portion of the anti-glare/reflection layer.

15. The liquid crystal display device of claim 12 , wherein the polymer beads are configured to locate between the middle portion of the anti-glare/reflection layer and a lower portion of the anti-glare/reflection layer.

Assignees

• Lg Display Co Ltd

Inventors

• Park Hyejeong
• Park Wonki
• Eo Yoonjung

Classifications

• G02B5/3033

  in the form of a thin sheet or foil, e.g. Polaroid · CPC title

• G02B1/111 Primary

  using layers comprising organic materials · CPC title

• G02B5/0247

  by means of voids or pores · CPC title

• G02F1/133528 Primary

  Polarisers · CPC title

• G02B5/0242

  by means of dispersed particles · CPC title