Organic light emitting device

Patent metadata

Field	Value
Publication number	US-10418583-B2
Application number	US-201715444198-A
Country	US
Kind code	B2
Filing date	Feb 27, 2017
Priority date	Feb 27, 2017
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

Provided is an organic light emitting device including an overcoat layer on a substrate, a first electrode disposed on the overcoat layer, an organic light emitting layer disposed on the first electrode and including a convex or concave curve; and a second electrode disposed on the organic light emitting layer.

First claim

What is claimed is:

1. An organic light emitting device comprising:
an overcoat layer disposed on a substrate and including a plurality of convex parts or a plurality of concave parts, at least one of the convex parts of the overcoat layer having a Full Width at High Maximum (“FWHM”) smaller than a radius of said at least one of the convex parts of the overcoat layer;
a first electrode disposed on the overcoat layer in a direction away from the substrate;
an organic light emitting layer disposed on the first electrode in the direction away farther from the substrate than the first electrode is from the substrate; and
a second electrode disposed on the organic light emitting layer in the direction farther away from the substrate than the organic light emitting layer is from the substrate.

2. The organic light emitting device of claim 1 , wherein the overcoat layer further includes a connection part that interconnects two adjacent ones of the convex portions or two adjacent ones of the concave portions, and the organic light emitting layer is thinnest between a center of each of the two adjacent convex parts or the two adjacent concave parts and the connection part.

3. The organic light emitting device of claim 1 , wherein a ratio of the FWHM to the radius of said one of the convex parts or said one of the concave parts is 1.0 or less.

4. The organic light emitting device of claim 1 , wherein an FWHM aspect ratio of said one of the convex parts is larger than an aspect ratio of said one of the convex parts.

5. The organic light emitting device of claim 4 , wherein a ratio of the FWHM aspect ratio of said one of the convex parts to the aspect ratio of said one of the convex parts is larger than 1.0.

6. The organic light emitting device of claim 1 , wherein said one of the convex parts or said one of the concave parts has a hexagonal shape in a plan view having a diameter in a range of 1 to 5 μm and a height in a range of 1 to 4 μm.

7. The organic light emitting device of claim 1 , wherein the concave parts or the concave parts are adjacent to each other without a gap therebetween.

8. The organic light emitting device of claim 1 , wherein said one of the convex parts or said one of the concave parts has a shape in which a slope increases from an end and then gradually decreases from a maximum slope.

9. The organic light emitting device of claim 8 , wherein the maximum slope of said one of the convex parts or said one of the concave parts ranges from 40 degrees to 60 degrees.

10. The organic light emitting device of claim 1 , wherein the first electrode, the organic light emitting layer, and the second electrode are disposed along a shape of a top surface of the overcoat layer to have a shape that follows a morphology of the overcoat layer.

11. The organic light emitting device of claim 1 , wherein a color filter is disposed between the substrate and the overcoat layer to correspond to a pixel region.

Assignees

• Lg Display Co Ltd

Inventors

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

Classifications

• H01L27/322

  Electricity · mapped topic

• H01L51/5281

  Electricity · mapped topic

• H01L27/3258

  Electricity · mapped topic

• H01L51/5209 Primary

  Electricity · mapped topic

• H10K59/80515

  characterised by their shape · CPC title