Organic light emitting diode display device

Patent metadata

Field	Value
Publication number	US-10319948-B2
Application number	US-201816106281-A
Country	US
Kind code	B2
Filing date	Aug 21, 2018
Priority date	Aug 31, 2015
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

An organic light emitting diode display device is provided. The organic light emitting diode display device includes a first insulating layer disposed on a substrate and having a first refractive index, a refraction inducing layer disposed on the first insulating layer having a second refractive index, a second insulating layer disposed on the refraction inducing layer and having a third refractive index, a first electrode disposed on the second insulating layer and having a fourth refractive index, and an organic light emitting layer and a second electrode disposed on the first electrode. The second insulating layer, the first electrode, the organic light emitting layer, and the second electrode include a plurality of convex parts and a plurality of concave parts.

First claim

What is claimed is:

1. An organic light emitting display device, comprising:
a substrate;
a refraction layer disposed on the substrate;
a plurality of micro lenses disposed on the refraction layer to be spaced apart from each other; and
an organic light emitting diode disposed on the plurality of micro lenses and the refraction layer,
wherein the organic light emitting diode is in contact with the refraction layer through between the plurality of micro lenses.

2. The organic light emitting display device according to claim 1 , wherein the organic light emitting diode includes a plurality of convex parts and a plurality of concave parts.

3. The organic light emitting display device according to claim 2 , wherein each of the plurality of concave parts of the organic light emitting diode is in contact with the refraction layer.

4. The organic light emitting display device according to claim 1 , wherein the organic light emitting diode includes:
a first electrode disposed on the plurality of micro lenses and the refraction layer;
an organic light emitting layer disposed on the first electrode; and
a second electrode disposed on the organic light emitting layer,
wherein the first electrode is in contact with the refraction layer through between the plurality of micro lenses.

5. The organic light emitting display device according to claim 1 , wherein each of the plurality of micro lenses includes:
a lower portion in contact with the refraction layer; and
an upper portion and a side portion in contact with the organic light emitting diode,
wherein the organic light emitting diode is in contact with the refraction layer through between the side portion of the plurality of micro lenses.

6. The organic light emitting display device according to claim 5 , wherein the organic light emitting diode includes:
a first electrode covering to the refraction layer, the upper portion and the side portion of the plurality of micro lenses;
an organic light emitting layer disposed on the first electrode; and
a second electrode disposed on the organic light emitting layer,
wherein the first electrode is in contact with the refraction layer through between the side portion of the plurality of micro lenses.

7. The organic light emitting display device according to claim 1 ,
wherein the refraction layer includes a first insulating layer disposed on the substrate,
wherein the organic light emitting diode is in contact with the first insulating layer through between the plurality of micro lenses.

8. The organic light emitting display device according to claim 7 , further comprising a second insulating layer disposed on the first insulating layer and including the plurality of micro lenses,
wherein the first insulating layer and the second insulating layer are formed by the same material.

9. The organic light emitting display device according to claim 1 , wherein the refraction layer includes:
a first insulating layer disposed on the substrate; and
a refraction inducing layer disposed on the first insulating layer,
wherein the organic light emitting diode is in contact with the refraction inducing layer through between the plurality of micro lenses.

10. The organic light emitting display device according to claim 9 , wherein a refractive index of the refractive inducing layer is higher than a refractive index of the first insulating layer.

11. The organic light emitting display device according to claim 9 , wherein the organic light emitting diode includes:
a first electrode covering the plurality of micro lenses and the refraction inducing layer;
an organic light emitting layer disposed on the first electrode; and
a second electrode disposed on the organic light emitting layer,
wherein the first electrode is in contact with the refraction inducing layer through between the plurality of micro lenses.

12. The organic light emitting display device according to claim 11 , wherein the refraction inducing layer is any one of indium tin oxide (ITO), indium zinc oxide (IZO), and silicon nitride SiNx.

13. The organic light emitting display device according to claim 11 , further comprising a second insulating layer disposed on the refraction inducing layer and including the plurality of micro lenses,
wherein a refractive index of the refraction inducing layer and the first electrode is higher than a refractive index of the first insulating layer and the second insulating layer.

14. The organic light emitting display device according to claim 11 , wherein the refraction inducing layer is formed of a plurality of layers having different refractive indexes.

15. The organic light emitting display device according to claim 14 , further comprising a second insulating layer disposed on the refraction inducing layer and including the plurality of micro lenses,
wherein a refractive index of the refraction inducing layer, which is formed of the plurality of layers, increases as the layer is closer to the second insulating layer.

16. An organic light emitting display device, comprising:
a substrate including a plurality of sub pixels;
a refraction layer disposed on the substrate;
a plurality of micro lenses disposed on the refraction layer to be spaced apart from each other; and
a first electrode, an organic light emitting layer, and a second electrode of an organic light emitting diode disposed on the refraction layer,
wherein the first electrode of the organic light emitting diode is in contact with the refraction layer through between the plurality of micro lenses.

17. The organic light emitting display device according to claim 16 , wherein the refraction layer includes:
a first insulating layer disposed on the substrate; and
a refraction inducing layer disposed on the first insulating layer,
wherein the first electrode of the organic light emitting diode is in contact with the refraction inducing layer through between the plurality of micro lenses.

18. The organic light emitting display device according to claim 17 , wherein the refraction inducing layer is any one of indium tin oxide (ITO), indium zinc oxide (IZO), and silicon nitride SiNx.

19. The organic light emitting display device according to claim 17 , wherein the refractive index of the refraction inducing layer and the first electrode is higher than the refractive index of the first insulating layer.

20. The organic light emitting display device according to claim 17 , further comprising a second insulating layer disposed on the refraction inducing layer and including the plurality of micro lenses,
wherein the refraction inducing layer is formed of a plurality of layers having different refractive indexes, and
wherein a refractive index of the refraction inducing layer, which is formed of the plurality of layers, increases as the layer is closer to the second insulating layer.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Sookang
• Jo Soyoung
• Koo Wonhoe
• Jang Jihyang
• Lim Hyunsoo

Classifications

• H01L51/5275 Primary

  Electricity · mapped topic

• H01L27/3258

  Electricity · mapped topic

• H01L27/326

  Electricity · mapped topic

• H01L27/3246

  Electricity · mapped topic

• H01L27/3248

  Electricity · mapped topic