Organic light-emitting display apparatus

Patent metadata

Field	Value
Publication number	US-10062865-B2
Application number	US-201615365591-A
Country	US
Kind code	B2
Filing date	Nov 30, 2016
Priority date	Jul 13, 2016
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

An organic light-emitting display apparatus includes: a substrate; a pixel electrode above the substrate; an intermediate layer above the pixel electrode and including an organic emission layer; an opposite electrode above the intermediate layer; and an encapsulation structure above the opposite electrode and including at least one inorganic film and at least one organic film. A difference between a refractive index of the at least one inorganic film and a refractive index of the at least one organic film is in a range between about 0.3 to about 0.5. A thickness of the at least one inorganic film is in a range of about 0.7 μm to about 1.5 μm. A thickness of the at least one organic film is in a range of about 3.5 μm to about 6.5 μm.

First claim

What is claimed is:

1. An organic light-emitting display apparatus comprising:
a substrate;
a pixel electrode above the substrate;
an intermediate layer above the pixel electrode and comprising an organic emission layer;
an opposite electrode above the intermediate layer;
an encapsulation structure above the opposite electrode and comprising at least one inorganic film and at least one organic film,
a capping layer between the opposite electrode and the encapsulation structure and contacting with the opposite electrode; and
a cover layer above the capping layer;
wherein a difference between a refractive index of the at least one inorganic film and a refractive index of the at least one organic film is in a range between about 0.3 to about 0.5,
a thickness of the at least one inorganic film is in a range of about 0.7 μm to about 1.5 μm, and
a thickness of the at least one organic film is in a range of about 3.5 μm to about 6.5 μm.

2. The organic light-emitting display apparatus of claim 1 , wherein the encapsulation structure comprises a first inorganic film, a first organic film, and a second inorganic film, which are sequentially stacked above the opposite electrode.

3. The organic light-emitting display apparatus of claim 1 , wherein the at least one inorganic film comprises silicon nitride (SiNx).

4. The organic light-emitting display apparatus of claim 1 , wherein the thickness of the at least one organic film is about 6 μm, and the thickness of the at least one inorganic film is about 1 μm.

5. The organic light-emitting display apparatus of claim 1 , wherein the at least one inorganic film is in an uppermost portion of the encapsulation structure, and the refractive index of the at least one inorganic film is in a range of about 1.85 to about 1.95.

6. The organic light-emitting display apparatus of claim 5 , further comprising a buffer layer above the encapsulation structure and contacting with the at least one inorganic film.

7. The organic light-emitting display apparatus of claim 6 , wherein a thickness of the buffer layer is in a range of about 50 nm to about 80 nm, and a refractive index of the buffer layer is in a range of about 1.33 to about 1.5.

8. The organic light-emitting display apparatus of claim 6 , wherein the buffer layer comprises silicon oxynitride (SiON), silicon oxide (SiO2), or an organic material.

9. The organic light-emitting display apparatus of claim 1 , wherein the encapsulation structure comprises a first inorganic film, a first organic film, a second inorganic film, a second organic film, and a third inorganic film, which are sequentially stacked above the opposite electrode.

10. The organic light-emitting display apparatus of claim 1 , further comprising:
a pixel defining film comprising an opening exposing at least a portion of the pixel electrode.

11. The organic light-emitting display apparatus of claim 1 , wherein the pixel electrode is a reflective electrode configured to reflect light, and the opposite electrode is a transparent or translucent electrode configured to transmit at least a part of light.

12. An organic light-emitting display apparatus comprising:
a substrate;
a pixel electrode above the substrate;
an intermediate layer above the pixel electrode and comprising an organic emission layer;
an opposite electrode above the intermediate layer;
an encapsulation structure above the opposite electrode and comprising at least one inorganic film and at least one organic film; and
a buffer layer above the encapsulation structure,
wherein a thickness of the at least one inorganic film is in a range of about 0.7 μm to about 1.5 μm,
a thickness of the at least one organic film is in a range of about 3.5 μm to about 6.5 μm, and
a thickness of the buffer layer is in a range of about 50 μm to about 80 μm.

13. The organic light-emitting display apparatus of claim 12 , wherein a difference between a refractive index of the at least one inorganic film and a refractive index of the at least one organic film is in a range of about 0.3 to about 0.5, and a refractive index of the buffer layer is less than the refractive index of the at least one inorganic film.

14. The organic light-emitting display apparatus of claim 13 , wherein the refractive index of the at least one inorganic film is in a range of about 1.85 to about 1.95, the refractive index of the at least one organic film is in a range of about 1.45 to about 1.55, and the refractive index of the buffer layer is in a range of about 1.33 to about 1.5.

15. The organic light-emitting display apparatus of claim 14 , wherein the at least one inorganic film comprises silicon nitride (SiNx).

16. The organic light-emitting display apparatus of claim 14 , wherein the buffer layer comprises silicon oxynitride (SiON), silicon oxide (SiO2), or an organic material.

17. The organic light-emitting display apparatus of claim 14 , further comprising:
a capping layer between the opposite electrode and the encapsulation structure and contacting with the opposite electrode; and
a cover layer above the capping layer.

18. The organic light-emitting display apparatus of claim 14 , wherein the encapsulation structure comprises a first inorganic film, a first organic film, and a second inorganic film, which are sequentially stacked above the opposite electrode.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Minsu
• Ivan Maidanchuk
• LEE Seungrok
• Lee Wonbaek

Classifications

• H10K50/8445

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K50/858 Primary

  comprising refractive means, e.g. lenses · CPC title

• H01L27/3262

  Electricity · mapped topic

• H01L51/5237

  Electricity · mapped topic