Organic light emitting device with micro lenses and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-11114643-B2
Application number	US-201916424613-A
Country	US
Kind code	B2
Filing date	May 29, 2019
Priority date	Nov 30, 2015
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

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. An organic light emitting display device, comprising:
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, and each of the plurality of micro lens including a convex region;
a first electrode disposed on the overcoat layer and disposed in the emission area;
an organic stacking layer disposed on the first electrode and including an organic emission layer, at least one surface of the organic stacking layer having a flat surface in the emission area;
a reflective layer between the first electrode and the organic stacking layer in the emission area; and
a second electrode disposed on the organic emission layer in the emission area and the non-emission area,
wherein the organic stacking layer is divided into a lower organic stacking layer disposed on the first electrode and an upper organic staking layer disposed on the lower organic stacking layer, and the upper organic stacking layer includes the emission layer, and the flat surface is one surface of the lower organic stacking layer in the emission area,
each of the plurality of micro lens further includes a concave region connected to the convex region, and the lower organic stacking layer is disposed at the concave region of the micro lens of the overcoat layer,
a morphology of the first electrode is corresponding to a morphology of the plurality of micro lenses in the emission area,
the first electrode comprises a convex portion and a connection portion,
the lower organic stacking layer covers the convex portion of the first electrode, and
the lower organic stacking layer comprises a hole injection layer, and
wherein the micro lens 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 the convex region of the micro lens, and
wherein the reflective layer is disposed only in the first to third regions or the first and second regions of the micro lens.

2. The organic light emitting display device of claim 1 , wherein a surface of the upper organic stacking layer away from the first electrode is a flat surface in the emission area.

3. The organic light emitting display device of claim 2 , wherein the second electrode is flatly formed in the emission area.

4. The organic light emitting display device of claim 1 , wherein the lower organic stacking layer has an upper surface facing the upper organic stacking layer, and the upper surface of the lower organic stacking layer is flat throughout the emission area.

Assignees

• Lg Display Co Ltd

Inventors

• Joung Seung Ryong
• Lee Kang Ju
• 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

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

• H10K59/124 Primary

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

• H01L27/3258

  Electricity · mapped topic