Organic light emitting diode display device with micro lenses

Patent metadata

Field	Value
Publication number	US-10374197-B2
Application number	US-201615337517-A
Country	US
Kind code	B2
Filing date	Oct 28, 2016
Priority date	Oct 30, 2015
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

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 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, each of the plurality of micro lenses comprising a concave portion and a connecting portion;
a thin film transistor disposed in the non-emissive area and covered by the overcoat layer;
a first electrode disposed on the overcoat layer and connected to the thin film transistor through a contact hole formed in the overcoat layer;
a bank pattern disposed in the non-emissive area so as to be superposed on the at least one depression and the contact hole;
an organic light emitting layer disposed on the first electrode; and
a second electrode disposed on the organic light emitting layer,
wherein each of the first electrode, the organic light emitting layer and the second electrode has a shape according to the plurality of micro lenses in the emissive area,
wherein the at least one depression has a different shape from a shape of the concave portion, and
wherein the at least one depression surrounds the emissive area in a plan view.

2. The organic light emitting diode display device of claim 1 , wherein the bank pattern is disposed to fill the at least one depression.

3. The organic light emitting diode display device of claim 2 , wherein the bank pattern is formed of an opaque organic material.

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

5. 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.

6. The organic light emitting diode display device of claim 1 , wherein the first electrode is disposed within the at least one depression, and the bank pattern is disposed on the first electrode.

7. The organic light emitting diode display device of claim 6 , wherein the organic light emitting layer and the second electrode are disposed on the bank pattern, and the second electrode is a reflective electrode.

8. The organic light emitting diode display device of claim 1 , wherein the overcoat layer has at least one step in the non-emissive area or in the emissive area adjacent to the non-emissive area.

9. The organic light emitting diode display device of claim 8 , wherein the overcoat layer comprises a protruding portion provided between the at least one step and the at least one depression located adjacent to the at least one step, and a height from the concave portion to the connecting portion of each of the plurality of micro lenses is less than a height from the concave portion of each of the plurality of micro lenses to the protruding portion of the overcoat layer.

10. The organic light emitting diode display device of claim 9 , wherein the position of a first organic light emitting element disposed on the connecting portion is lower than that of the first electrode of a second organic light emitting element disposed on the protruding portion.

11. The organic light emitting diode display device of claim 9 , wherein the first electrode of the second organic light emitting element extends to at least a part of the protruding portion.

12. The organic light emitting diode display device of claim 11 , wherein the first electrode of the second organic light emitting element is a reflective electrode.

13. The organic light emitting diode display device of claim 11 , wherein the first electrode of the second organic light emitting element is formed of a transparent conductive material, and a reflective layer is disposed below the first electrode of the second organic light emitting element in the same form as that of the first electrode.

14. The organic light emitting diode display device of claim 1 , wherein the first electrode is further disposed on the at least one depression and has a shape according to the at least one depression in the non-emissive area.

15. The organic light emitting diode display device of claim 14 , wherein the bank pattern is disposed between the first electrode and the organic light emitting layer in the non-emissive area.

Assignees

• Lg Display Co Ltd

Inventors

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

Classifications

• H01L27/3246

  Electricity · mapped topic

• H01L51/5275

  Electricity · mapped topic

• H01L51/5225

  Electricity · mapped topic

• H01L51/5271

  Electricity · mapped topic

• H01L51/5268 Primary

  Electricity · mapped topic