Organic light emitting display device and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-11956993-B2
Application number	US-202117398154-A
Country	US
Kind code	B2
Filing date	Aug 10, 2021
Priority date	Nov 30, 2015
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

An organic light emitting display device and a method for manufacturing the same are disclosed. The organic light emitting display device includes a substrate divided into an emission area and a non-emission area, an overcoat layer disposed on the substrate and including a plurality of micro lenses in the emission area, a first electrode disposed on the overcoat layer and disposed in the emission area, an organic emission layer disposed on the substrate and having at least one layer which is flatly formed in the emission area, and a second electrode disposed on the organic emission layer.

First claim

What is claimed is:

1. A method for manufacturing an organic light emitting display device, comprising:
forming an overcoat layer with a plurality of micro lenses in an emission area on a substrate, the substrate being divided into the emission area and a non-emission area;
forming a first electrode on the overcoat layer in the emission area;
forming an organic stacking layer on the first electrode in the emission area, the organic stacking layer including an organic emission layer, at least one surface of the organic stacking layer having a flat surface in the emission area;
forming a reflective layer disposed between the organic emission layer and the first electrode in the emission area; and
forming a second electrode on the organic stacking layer in the emission area and the non-emission area,
wherein a micro lens from the plurality of micro lenses is divided into a first region, a second region, a third region, and a fourth region,
the first region corresponds to a concave region of the micro lens,
the second region corresponds to a first inclined surface of the micro lens, the first inclined surface extended from the concave region,
the third region corresponds to a second inclined surface extended from the first inclined surface, and
the fourth region corresponds to a convex region of the micro lens, and
wherein the reflective layer is formed only in the first to third regions or the first and second regions of the micro lens.

2. The method for manufacturing the organic light emitting display device of claim 1 , wherein the organic stacking layer is divided into a lower organic stacking layer disposed on the first electrode and an upper organic stacking layer disposed on the lower organic stacking layer, the organic emission layer is in upper organic stacking layer, and the lower organic stacking layer or the upper organic stacking layer is formed by an inkjet printing method or a nozzle printing method.

3. The method for manufacturing the organic light emitting display device of claim 1 , wherein each of the plurality of micro lenses including a convex region, a thickness in a vertical direction of the organic stacking layer is smallest in a region corresponding to the convex region of each of the plurality of micro lenses.

4. The method for manufacturing the organic light emitting display device of claim 1 , wherein an absolute value of a slope of the first inclined surface is smaller than an absolute value of a slope of the second inclined surface.

5. The method for manufacturing the organic light emitting display device of claim 1 , wherein a morphology of the first electrode is corresponding to a morphology of the plurality of micro lenses in the emission area.

6. The method for manufacturing the organic light emitting display device of claim 5 , wherein the first electrode comprises a convex portion and a connection portion.

7. The method for manufacturing the organic light emitting display device of claim 2 , wherein the upper organic stacking layer includes the organic emission layer.

8. The method for manufacturing the organic light emitting display device of claim 2 , wherein each of the plurality of micro lenses further includes a concave region connected to the convex region, and the lower organic stacking layer is disposed at a concave region of the micro lens.

9. The method for manufacturing the organic light emitting display device of claim 8 , wherein a morphology of the first electrode is corresponding to a morphology of the plurality of micro lenses in the emission area.

10. The method for manufacturing the organic light emitting display device of claim 9 , wherein the first electrode comprises a convex portion and a connection portion.

11. The method for manufacturing the organic light emitting display device of claim 1 , wherein a color filter layer is further formed between the substrate and the overcoat layer in the emission area.

Assignees

• Lg Display Co Ltd

Inventors

• Joung Seungryong
• Lee Kangju
• Park Hansun
• Jeon Seongsu
• Koo Wonhoe

Classifications

• H10K59/879 Primary

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

• H10K59/80515

  characterised by their shape · CPC title

• H10K50/858 Primary

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

• H10K59/124 Primary

  Insulating layers formed between TFT elements and OLED elements · CPC title

• H10K50/11

  characterised by the electroluminescent [EL] layers · CPC title