Organic light emitting diode display device with micro lenses

Patent metadata

Field	Value
Publication number	US-11069879-B2
Application number	US-201916450174-A
Country	US
Kind code	B2
Filing date	Jun 24, 2019
Priority date	Oct 30, 2015
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

Disclosed is an organic light emitting diode display device. The disclosed organic light emitting diode display device includes an overcoat layer disposed on a substrate that is divided into an emissive area and a non-emissive area, and has multiple micro lenses in the emissive area and at least one depression in the non-emissive area. The organic light emitting diode display device further includes: a first electrode disposed on the overcoat layer, wherein the first electrode is disposed in the entire emissive area and in a part of the non-emissive area; a bank pattern disposed in the non-emissive area so as to be superposed on the depression; an organic light emitting layer disposed on the substrate; and a second electrode disposed on the organic light emitting layer. Accordingly, the organic light emitting diode display device may prevent light leakage.

First claim

What is claimed is:

1. An organic light emitting diode display device comprising:
a substrate having a plurality of emissive areas and a non-emissive area that surrounds the plurality of emissive areas;
an overcoat layer disposed on the substrate and having a plurality of micro lenses in each emissive area and at least one depression in the non-emissive area, the plurality of micro lenses comprising a concave portion;
a first electrode disposed on the overcoat layer in the plurality of emissive areas;
an organic light emitting layer disposed on the first electrode, the overcoat layer, and the at least one depression; and
a second electrode disposed on the organic light emitting layer and including at least one concave portion disposed on the at least one depression,
wherein a distance between the substrate and the concave portion of the second electrode is smaller than a distance between the substrate and the concave portion of the plurality of micro lenses,
wherein the overcoat layer is configured to have a single layer,
wherein the organic light emitting layer covers the at least one depression and is in contact with one side of the overcoat layer in the at least one depression, and
wherein the at least one depression does not overlap with the first electrode.

2. The organic light emitting diode display device of claim 1 , wherein a height of the at least one depression is the same as a vertical length of the overcoat layer in the non-emissive area.

3. The organic light emitting diode display device of claim 1 , wherein the second electrode further comprises at least one convex portion in the non-emissive area.

4. The organic light emitting diode display device of claim 3 , wherein a bottom surface of the at least one concave portion of the second electrode is positioned between the substrate and the concave portion of the plurality of micro lenses.

5. The organic light emitting diode display device of claim 1 , wherein the at least one depression is provided in the non-emissive area corresponding to at least one side of at least one of the plurality of emissive areas.

6. The organic light emitting diode display device of claim 1 , wherein a first depression provided in an area corresponding to one side of at least one of the plurality of emissive areas has a different size from that of a second depression provided in an area corresponding to one side of each of the remaining plurality of emissive areas.

7. The organic light emitting diode display device of claim 1 , wherein the second electrode is a reflective electrode.

8. The organic light emitting diode display device of claim 1 , wherein the at least one depression has a different shape from a shape of the concave portion.

9. The organic light emitting diode display device of claim 1 , wherein the at least one depression surrounds the emissive area in a plan view.

10. The organic light emitting diode display device of claim 1 , wherein the overcoat layer has inclined surfaces in the at least one depression, and
wherein the organic light emitting layer and the second electrode have inclined surfaces corresponding to the inclined surfaces of the overcoat layer in the at least one depression.

11. The organic light emitting diode display device of claim 1 , further comprising a bank pattern disposed between the organic light emitting layer and the overcoat layer in the non-emissive area.

12. The organic light emitting diode display device of claim 11 , wherein the bank pattern is formed of an opaque organic material.

13. The organic light emitting diode display device of claim 11 , wherein the organic light emitting layer and the second electrode are disposed on side surfaces of the overcoat layer that are exposed by the bank patterns in the areas corresponding to the at least one depression of the overcoat layer.

14. The organic light emitting diode display device of claim 1 , further comprising a color filter disposed between the overcoat layer and the substrate,
wherein the organic light emitting layer is in contact with one side of the color filter in the at least one depression.

15. The organic light emitting diode display device of claim 1 , wherein the organic light emitting layer is in contact with an upper surface of the overcoat layer to cover an end portion of the first electrode.

16. The organic light emitting diode display device of claim 1 , wherein the second electrode includes at least one concave portion disposed on the at least one depression, and
wherein the at least one concave portion of the second electrode is positioned between the substrate and the concave portion of the plurality of micro lenses.

17. An organic light emitting diode display device comprising:
a substrate divided into an emissive area and a non-emissive area;
an overcoat layer disposed on the substrate and having a plurality of micro lenses in the emissive area and at least one depression in the non-emissive area, the plurality of micro lenses comprising a concave portion;
a first electrode disposed on the overcoat layer in the emissive area;
an organic light emitting layer disposed on the first electrode, the overcoat layer, and the at least one depression; and
a second electrode disposed on the organic light emitting layer and including at least one concave portion disposed on the at least one depression,
wherein the at least one depression has a different shape from a shape of the concave portion,
wherein a distance between the substrate and the concave portion of the second electrode is smaller than a distance between the substrate and the concave portion of the plurality of micro lenses,
wherein the overcoat layer is configured to have a single layer,
wherein the organic light emitting layer covers the at least one depression and is in contact with one side of the overcoat layer in the at least one depression, and
wherein the at least one depression does not overlap with the first electrode.

18. The organic light emitting diode display device of claim 17 , further comprising a thin film transistor disposed in the non-emissive area and covered by the overcoat layer,
wherein the first electrode disposed is connected to the thin film transistor through a contact hole formed in the overcoat layer, and
wherein the at least one depression has a different shape from a shape of the concave portion and the contact hole.

19. The organic light emitting diode display device of claim 17 , wherein the second electrode further comprises at least one convex portion in the non-emissive area, and
wherein a bottom surface of the at least one concave portion of the second electrode is positioned between the substrate and the concave portion of the plurality of micro lenses.

20. The organic light emitting diode display device of claim 17 , wherein the at least one depression is provided in the non-emissive area corresponding to at least one side of the emissive area.

21. The organic light emitting diode display device of claim 17 , wherein a first depression provided in an area corresponding to one side of at least one of the plurality of emissive areas has a different size from that of a second depression provided in an area corresponding to one side of each of the remaining plurality of emissive areas.

22. The organic light emitting diode display device of claim 17 , wherein the second electrode is a reflective electrode.

23. The organic light emitting diode display device of claim 17 , wherein the

Assignees

• Lg Display Co Ltd

Inventors

• Kim Jintae
• Kim Sookang
• Jo Soyoung
• Koo Wonhoe
• Jang Jihyang
• Lim Hyunsoo
• Choi Mingeun

Classifications

• H10K59/879

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

• H10K59/878

  comprising reflective means · CPC title

• H10K59/80521

  characterised by their shape · CPC title

• H10K59/80515

  characterised by their shape · CPC title

• H10K50/854

  comprising scattering means · CPC title