Organic light emitting display panel and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-10192947-B2
Application number	US-201815864591-A
Country	US
Kind code	B2
Filing date	Jan 8, 2018
Priority date	Aug 25, 2015
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

An organic light emitting display panel includes a first base substrate, a thin film transistor disposed on the first base substrate, a first electrode electrically connected to the thin film transistor, a pixel defining layer defining an opening that exposes a portion of the first electrode, a second electrode disposed on the first electrode, a light emitting structure disposed between the first electrode and the second electrode, a second base substrate disposed on the second electrode, and a first mirror layer disposed on the second base substrate and defining an opening that overlaps the light emitting structure. At least one of the pixel defining layer and the mirror layer has an uneven surface.

First claim

What is claimed is:

1. An organic light emitting display panel, comprising:
a first base substrate;
a thin film transistor disposed on the first base substrate;
a first electrode electrically connected to the thin film transistor;
a pixel defining layer defining an opening that exposes a portion of the first electrode;
a second electrode disposed on the first electrode;
a light emitting structure disposed between the first electrode and the second electrode;
a second base substrate disposed on the second electrode; and
a reflective or opaque metal layer disposed on the second base substrate and defining an opening that overlaps the light emitting structure,
wherein the pixel defining layer comprises a first portion and a second portion that are disposed between the first electrode and a first electrode of an adjacent pixel,
wherein the first portion overlaps an end portion of the first electrode, and the second portion overlaps an end portion of the first electrode of the adjacent pixel,
wherein the first portion is spaced apart from the second portion in at least one cross-sectional view, and
wherein the second electrode is disposed on both of the first portion and the second portion.

2. The organic light emitting display panel of claim 1 , further comprising:
a transparent metal layer disposed on the reflective or opaque metal layer,
wherein the reflective or opaque metal layer has an uneven surface, and
wherein the transparent metal layer has an even surface that overlaps the uneven surface of the reflective or opaque metal layer.

3. The organic light emitting display panel of claim 2 , wherein the transparent metal layer is directly disposed on the reflective or opaque metal layer to cover the first surface and the side surface of the reflective or opaque metal layer.

4. The organic light emitting display panel of claim 1 , wherein the pixel defining layer comprises an upper surface that is in parallel with a surface of the first base substrate and a side surface, and
wherein the upper surface of the pixel defining layer is uneven, and the side surface of the pixel defining layer is even.

5. The organic light emitting display panel of claim 1 ,
wherein a light blocking element is disposed between the first portion and the second portion.

6. The organic light emitting display panel of claim 5 , wherein the light blocking element comprises an organic material.

7. The organic light emitting display panel of claim 1 , further comprising a planarization layer that covers the thin film transistor and makes contact with the pixel defining layer, and
wherein the planarization layer further comprises a light blocking portion protruded from an upper surface of the planarization layer.

8. The organic light emitting display panel of claim 1 , wherein the first portion and the second portion are completely spaced apart from each other in a plan view.

9. The organic light emitting display panel of claim 1 , wherein at least a portion of the first portion is connected to the second portion in a plan view.

10. An organic light emitting display panel, comprising:
a first base substrate;
a thin film transistor disposed on the first base substrate;
a first electrode electrically connected to the thin film transistor;
a pixel defining layer defining an opening that exposes a portion of the first electrode;
a second electrode disposed on the first electrode and on an upper surface of the pixel defining layer;
a light emitting structure disposed between the first electrode and the second electrode;
a second base substrate disposed on the second electrode; and
a reflective or opaque metal layer disposed on the second base substrate and defining an opening that overlaps the light emitting structure,
wherein a recessed portion is formed on the upper surface of the pixel defining layer between the first electrode and a first electrode of an adjacent pixel, and the recessed portion is spaced apart from the first electrode and the first electrode of the adjacent pixel in a cross-sectional view, and
wherein the pixel defining layer overlaps an end portion of the first electrode and an end portion of the first electrode of the adjacent pixel.

11. The organic light emitting display panel of claim 10 , wherein a light blocking element is disposed in the recessed portion.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Min-Soo
• Prushinskiy Valeriy
• Kim Mu-Gyeom

Classifications

• H01L51/524

  Electricity · mapped topic

• H01L2227/323

  Electricity · mapped topic

• H01L51/5271

  Electricity · mapped topic

• H01L27/3258

  Electricity · mapped topic

• H01L27/3272 Primary

  Electricity · mapped topic