Organic light emitting display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9891361-B2
Application number	US-201213492263-A
Country	US
Kind code	B2
Filing date	Jun 8, 2012
Priority date	Aug 5, 2011
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

Discussed are an organic light emitting display device and a method of manufacturing the same in which organic and inorganic films are formed on a polarization plate, and the polarization plate is attached to an organic light emitting panel so that the organic and inorganic films seal the organic light emitting panel, thereby achieving improved polarization and a simple sealing structure.

First claim

What is claimed is:

1. An organic light emitting display device comprising:
a substrate;
an organic light emitting element array disposed on the substrate;
a polarization plate disposed over the organic light emitting element array and including a first thin-film stacked structure formed of at least one of an organic film and an inorganic film, a quarter wave plate (λ/4 plate) disposed on the first thin-film stacked structure; and a linear polarization layer disposed on the quarter wave plate; and
an adhesive layer disposed between the substrate and the polarization plate, wherein the adhesive layer covers the organic light emitting element array, and wherein the at least one of the organic film and the inorganic film is in contact with the adhesive layer.

2. The device of claim 1 , wherein the polarization plate further comprises a second thin-film stacked structure disposed on an opposite side of the polarization plate from the first thin-film stacked structure, and formed of at least one organic film and at least one inorganic film, the at least one organic film and the at least one inorganic film of the second thin-film stacked structure being disposed one on top of the other.

3. The device of claim 1 , wherein the polarization plate further comprises a second thin-film stacked structure formed of at least one of an organic film or an inorganic film.

4. The device of claim 1 , wherein the first thin-film stacked structure faces the organic light emitting element array.

5. The device of claim 1 , wherein the organic film of the first thin-film stacked structure is in contact with the quarter wave plate.

6. The device of claim 1 , wherein the polarization plate further comprises a second thin-film stacked structure disposed between the quarter wave plate and the linear polarization layer, wherein the second thin-film stacked structure is formed of at least one organic film and at least one inorganic film, the at least one organic film and the at least one inorganic film of the second thin-film stacked structure are disposed one on top of the other.

7. The device of claim 1 , wherein the polarization plate further comprises a second thin-film stacked structure disposed between the quarter wave plate and the linear polarization layer, wherein the second thin-film stacked structure is formed of at least one of an organic film or an inorganic film.

8. The device of claim 1 , wherein a total thickness including the quarter wave plate and the first thin-film stacked structure is about 50 μm to 80 μm.

9. The device of claim 1 , wherein an absorption axis of the linear polarization layer is at +45° or −45° angle with respect to a slow axis of the quarter wave plate.

10. The device of claim 1 , wherein the quarter wave plate is formed of a stack consisting of two eighth wave plates (λ/8 plates).

11. The device of claim 1 , wherein the quarter wave plate is made of a material having a reflection rate equal to or less than 5% in a wavelength range of 400 nm to 500 nm.

12. The device of claim 1 , wherein a retardation value of the quarter wave plate is in a range of 138 nm to 148 nm.

13. The device of claim 1 , wherein the substrate comprises any one of a plastic thin film, a thin film glass and a metal foil, each having a thickness equal to or less than 0.2 mm.

14. The device of claim 13 , wherein the quarter wave plate has a moisture permeability equal to or less than 10 −3 g/m 2 ·day.

15. The device of claim 1 , wherein the at least one organic film includes a first and second organic films so that the at least one inorganic film is disposed in between the first and second organic films.

16. The device of claim 1 , wherein an incident light that obtains a first circular polarization in passing through the polarization plate, obtains a second circular polarization opposite to the first circular polarization upon reflection off the substrate, and is absorbed into the polarization plate.

17. The device of claim 1 , wherein the substrate is flexible.

18. An organic light emitting display device comprising:
a substrate;
an organic light emitting element array disposed on the substrate;
a polarization plate disposed over the organic light emitting element array and including a thin-film stacked structure formed of at least one organic film and at least one inorganic film, the at least one organic film and the at least one inorganic film being disposed one on top of the other, a quarter wave plate (λ/4 plate) disposed on the first thin-film stacked structure; and a linear polarization layer disposed on the quarter wave plate; and
an adhesive layer disposed between the substrate and the polarization plate, wherein the adhesive layer covers the organic light emitting element array, and wherein the at least one of the organic film and the inorganic film of the thin-film stacked structure is in contact with the adhesive layer.

Assignees

• Lee Jae Young
• Yang Won Jae
• Kim Myung Seop
• Lg Display Co Ltd

Inventors

• Lee Jae Young
• Yang Won Jae
• Kim Myung Seop

Classifications

• H01L51/5256

  Electricity · mapped topic

• G02B5/3041 Primary

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

• H01L51/5281

  Electricity · mapped topic

• H10K59/8793

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

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title