Organic light-emitting diode display device including a thin film encapsulation layer

Patent metadata

Field	Value
Publication number	US-12317675-B2
Application number	US-202418758333-A
Country	US
Kind code	B2
Filing date	Jun 28, 2024
Priority date	Sep 20, 2016
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

A display device includes: a substrate; an organic light-emitting diode positioned above the substrate; and a thin film encapsulation layer disposed on the organic light-emitting diode. The thin film encapsulation layer includes: at least one inorganic layer; and at least one organic layer disposed on the at least one inorganic layer. The at least one organic layer has a refractive index of about 1.66 or greater.

First claim

What is claimed is:

1. A display device, comprising:
a substrate;
an organic light-emitting diode disposed on the substrate;
a first layer disposed on the organic light-emitting diode and having a refractive index in a range from about 1.3 to about 1.4;
a second layer disposed on the first layer and comprising lithium fluoride (LiF);
at least one inorganic layer disposed on the second layer; and
at least one organic layer disposed alternately with the at least one inorganic layer,
wherein a refractive index difference between the at least one inorganic layer and the at least one organic layer is about 0.06 or less.

2. The display device of claim 1 , wherein the second layer has a refractive index in a range of from about 1.3 to about 1.4.

3. The display device of claim 1 , wherein the organic light-emitting diode comprises:
a first electrode disposed on the substrate;
an organic light-emitting layer disposed on the first electrode; and
a second electrode disposed on the organic light-emitting layer.

4. The display device of claim 3 , wherein the organic light-emitting diode comprises a first light emission auxiliary layer disposed between the first electrode and the organic light-emitting layer.

5. The display device of claim 4 , wherein the first light emission auxiliary layer comprises at least one of a hole injection layer and a hole transport layer.

6. The display device of claim 3 , wherein the organic light-emitting diode comprises a second light emission auxiliary layer disposed between the organic light-emitting layer and the second electrode.

7. The display device of claim 6 , wherein the second light emission auxiliary layer comprises at least one of an electron injection layer and an electron transport layer.

8. The display device of claim 1 , wherein the at least one organic layer has a refractive index of about 1.66 or greater.

9. The display device of claim 1 , wherein the at least one inorganic layer has a refractive index in a range from about 1.6 to about 2.8.

10. A display device, comprising:
a substrate;
an organic light-emitting diode disposed on the substrate;
a first layer disposed on the organic light-emitting diode and having a refractive index in a range from about 1.3 to about 1.4;
a second layer disposed on the first layer and comprising lithium fluoride (LiF);
at least one inorganic layer disposed on the second layer; and
at least one organic layer disposed alternately with the at least one inorganic layer,
wherein the at least one organic layer has a refractive index of about 1.66 or greater.

11. The display device of claim 10 , wherein the second layer has a refractive index in a range of from about 1.3 to about 1.4.

12. The display device of claim 10 , wherein the organic light-emitting diode comprises:
a first electrode disposed on the substrate;
an organic light-emitting layer disposed on the first electrode; and
a second electrode disposed on the organic light-emitting layer.

13. The display device of claim 12 , wherein the organic light-emitting diode comprises a first light emission auxiliary layer disposed between the first electrode and the organic light-emitting layer.

14. The display device of claim 13 , wherein the first light emission auxiliary layer comprises at least one of a hole injection layer and a hole transport layer.

15. The display device of claim 12 , wherein the organic light-emitting diode comprises a second light emission auxiliary layer disposed between the organic light-emitting layer and the second electrode.

16. The display device of claim 15 , wherein the second light emission auxiliary layer comprises at least one of an electron injection layer and an electron transport layer.

17. The display device of claim 10 , wherein the at least one organic layer has a refractive index in a range of from about 1.66 to about 2.8.

18. The display device of claim 10 , wherein the at least one inorganic layer has a refractive index in a range from about 1.6 to about 2.8.

19. A display device, comprising:
a substrate;
an organic light-emitting diode disposed on the substrate;
at least one inorganic layer disposed on the organic light-emitting diode; and
at least one organic layer disposed alternately with the at least one inorganic layer,
wherein the organic light-emitting diode comprises:
a first electrode disposed on the substrate;
a first light emission auxiliary layer disposed on the first electrode;
an organic light-emitting layer disposed on the first light emission auxiliary layer;
a second light emission auxiliary layer disposed on the organic light-emitting layer; and
a second electrode disposed on the second light emission auxiliary layer, and

a refractive index difference between the at least one inorganic layer and the at least one organic layer is about 0.06 or less.

20. The display device of claim 19 , further comprising:
a first layer disposed on the organic light-emitting diode and having a refractive index in a range from about 1.3 to about 1.4; and
a second layer disposed on the first layer and comprising lithium fluoride (LiF).

Assignees

• Samsung Display Co Ltd

Inventors

• Ju Yongchan
• Kim Yisu
• Park Eungseok
• Yun Wonmin
• Lee Byoungduk
• Cho Yoonhyeung

Classifications

• H10K59/122

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

• H10K50/171

  Electron injection layers · CPC title

• H10K50/17

  Carrier injection layers · CPC title

• H10K50/8445

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

• H10K50/858 Primary

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