Polarizing plate, display device including the polarizing plate, and method of manufacturing the polarizing plate

Patent metadata

Field	Value
Publication number	US-9411082-B2
Application number	US-201414306787-A
Country	US
Kind code	B2
Filing date	Jun 17, 2014
Priority date	Dec 18, 2013
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

A polarizing plate includes a base film and a polarizer. The polarizer includes a dichroic dye formed on the base film, oriented perpendicular to a plane of the base film, and having a discotic liquid crystal phase.

First claim

What is claimed is:

1. A polarizing plate comprising:
a base film; and
a polarizer comprising a dichroic dye disposed on the base film, oriented perpendicular to a plane of the base film, and having a discotic liquid crystal phase,
wherein the base film comprises a λ/4 plate film configured to give a phase difference of λ/4 to penetrating light.

2. The polarizing plate of claim 1 , wherein the polarizer comprises a first absorption axis oriented perpendicular to the plane of the base film.

3. The polarizing plate of claim 2 , wherein the polarizer further comprises a second absorption axis oriented perpendicular to the first absorption axis and parallel to the plane of the base film.

4. The polarizing plate of claim 3 , wherein the polarizer comprises a penetration axis oriented perpendicular to the second absorption axis and parallel to the plane of the base film.

5. The polarizing plate of claim 4 , wherein the base film comprises a slow phase axis oriented at an angle of from about 45° to about 135° with respect to the penetration axis of the polarizer.

6. The polarizing plate of claim 1 , wherein the polarizer absorbs side light and transmits front light from light provided from a bottom of the base film.

7. The polarizing plate of claim 1 , further comprising a surface treatment layer disposed on the polarizer.

8. The polarizing plate of claim 1 , further comprising a supporting film supporting the polarizer and disposed between the λ/4 plate film and the polarizer.

9. The polarizing plate of claim 1 , further comprising a protection film disposed on at least one of the base film and the polarizer.

10. The polarizing plate of claim 9 , wherein the protection film comprises at least one compound selected from a group consisting of tri-acetyl cellulose (TAC), cycloolefin polymer (COP), cycloolefin copolymer (COC), polyethylene terephthalate (PET), polypropylene (PP), polycarbonate (PC), polysulfone (PSF), and polymethyl methacrylate (PMMA).

11. The polarizing plate of claim 1 , further comprising a scattering layer disposed on the polarizer.

12. The polarizing plate of claim 11 , wherein the scattering layer comprises one of silicon oxide beads and polymer beads.

13. A display device comprising:
a base board;
a thin film transistor disposed on the base board;
a first electrode disposed on the base board and electrically connected to the thin film transistor;
an organic emission layer disposed on the first electrode;
a second electrode disposed on the organic emission layer; and
a polarizing plate disposed on the second electrode,
wherein the polarizing plate comprises:
a base film; and
a polarizer comprising a dichroic dye disposed on the base film, oriented perpendicular to a plane of the base film, and having a discotic liquid crystal phase.

14. The display device of claim 13 , wherein the polarizer comprises a first absorption axis oriented perpendicular the plane of the base film.

15. The display device of claim 14 , wherein the polarizer further comprises a second absorption axis oriented perpendicular to the first absorption axis.

16. The display device of claim 15 , wherein the polarizer comprises a penetration axis oriented perpendicular to the second absorption axis and extending parallel to the plane of the base film.

17. The display device of claim 16 , wherein the base film comprises a slow phase axis oriented at an angle of from about 45° to about 135° with respect to the penetration axis of the polarizer.

Assignees

• Samsung Display Co Ltd

Inventors

• Beon Beong-Hun
• Park Seungbeom
• Kim Jihye

Classifications

• H10K59/8793

  Arrangements for polarized light emission (H10K59/8791 takes precedence) · CPC title

• G02B1/105

  Physics · mapped topic

• G02B5/0226

  having particles on the surface · CPC title

• G02B5/3041

  comprising multiple thin layers, e.g. multilayer stacks · CPC title

• G02B1/04

  made of organic materials, e.g. plastics (G02B1/08 takes precedence) · CPC title