Organic light emitting display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9466648-B2
Application number	US-201414338697-A
Country	US
Kind code	B2
Filing date	Jul 23, 2014
Priority date	Jan 28, 2014
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

An organic light emitting diode display may include a substrate, a pixel defining layer on the substrate, being configured to define a pixel area, a pixel electrode on the pixel area, a light emitting layer on the pixel electrode, a common electrode on the light emitting layer, and an auxiliary wire spaced apart from the pixel electrode and disposed on the same layer as the pixel electrode. The pixel defining layer may include a pixel defining part configured to define a pixel area and a spacer protruding from the pixel defining part. The auxiliary wire may not overlap the spacer.

First claim

What is claimed is:

1. An organic light emitting diode display, comprising:
a substrate;
a pixel defining layer on the substrate, the pixel defining layer defining pixel areas;
a pixel electrode on each pixel area;
a light emitting layer on the pixel electrode;
a common electrode on the light emitting layer; and
an auxiliary wire spaced apart from the pixel electrode and on a same layer as the pixel electrode,
wherein:
the pixel defining layer includes a pixel defining part defining the pixel areas and a plurality of spacers protruding from the pixel defining part,
the auxiliary wire does not overlap the spacer, and
the plurality of spacers are discontinuously arranged in a region between the pixel areas.

2. The organic light emitting diode display as claimed in claim 1 , wherein the auxiliary wire is an initialization voltage wire.

3. The organic light emitting diode display as claimed in claim 1 , wherein the pixel electrode and the auxiliary wire are made of a same material.

4. The organic light emitting diode display as claimed in claim 3 , wherein the auxiliary wire comprises at least one metal layer and at least one transparent conductive oxide layer.

5. The organic light emitting diode display as claimed in claim 3 , wherein the auxiliary wire comprises a metal layer on the substrate and a transparent conductive oxide layer on the metal layer.

6. The organic light emitting diode display as claimed in claim 1 , further comprising a sealing member facing the substrate,
wherein:
the pixel defining layer is between the sealing member and the substrate, and
the spacer of the pixel defining layer maintains a space between the substrate and the sealing member.

7. The organic light emitting diode display as claimed in claim 1 , wherein the pixel defining part and the spacer are made of a same material.

8. The organic light emitting diode display as claimed in claim 1 , wherein the spacer has any one of the following shapes: a truncated pyramid, a prism, a truncated cone, a cylinder, a hemisphere, and a hemispheroid.

9. The organic light emitting diode display as claimed in claim 1 , wherein the auxiliary wire overlaps the pixel defining part.

10. A method of manufacturing an organic light emitting diode display, the method comprising:
forming a pixel electrode and an auxiliary wire on a substrate;
forming a photosensitive material layer on the pixel electrode and the auxiliary wire;
forming a pixel defining layer including pixel areas that expose a part of the pixel electrode by patterning the photosensitive material layer;
forming a light emitting layer on the pixel electrode; and
forming a common electrode on the light emitting layer,
wherein:
the pixel defining layer includes a pixel defining part defining the pixel areas and a plurality of spacers protruding from the pixel defining part,
the auxiliary wire does not overlap the spacer, and
the plurality of spacers are discontinuously arranged in a region between the pixel areas.

11. The method as claimed in claim 10 , wherein forming the pixel defining layer includes using a mask including a light shielding pattern.

12. The method as claimed in claim 10 , wherein forming the pixel defining layer includes performing a halftone exposure.

13. The method as claimed in claim 10 , further comprising arranging a sealing member to face the substrate, wherein:
the pixel defining layer is formed between the sealing member and the substrate, and
the spacer of the pixel defining layer maintains a space between the substrate and the sealing member.

14. The method as claimed in claim 10 , wherein the spacer has any one of the following shapes: a truncated pyramid, a prism, a truncated cone, a cylinder, a hemisphere, and a hemispheroid.

15. The method as claimed in claim 10 , wherein the forming of the pixel electrode and the auxiliary wire comprises:
forming a conductive material layer comprising at least one metal layer and at least one transparent conductive oxide layer on the substrate; and
patterning the conductive material layer.

16. The method as claimed in claim 10 , wherein the auxiliary wire overlaps the pixel defining part.

17. The organic light emitting diode display as claimed in claim 6 , wherein the common electrode is between the spacer and the sealing member.

18. The organic light emitting diode display as claimed in claim 1 , wherein the common electrode is on the spacer.

19. The method as claimed in claim 10 , wherein the common electrode is formed on the spacer.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Sung-Hoon

Classifications

• H10K50/86

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K50/8428

  Vertical spacers, e.g. arranged between the sealing arrangement and the OLED · CPC title

• H10K59/8723

  Vertical spacers, e.g. arranged between the sealing arrangement and the OLED · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K59/1315 Primary

  comprising structures specially adapted for lowering the resistance · CPC title