Organic light emitting display device

Patent metadata

Field	Value
Publication number	US-10186680-B2
Application number	US-201715700520-A
Country	US
Kind code	B2
Filing date	Sep 11, 2017
Priority date	Mar 9, 2017
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

An organic light emitting display device includes a pixel electrode, an auxiliary electrode, a pixel defining layer, a spacer, a light emitting layer, and an opposite electrode. The pixel electrode and auxiliary electrode on a same layer and are separated and electrically isolated from each other. The pixel defining layer is on the pixel and auxiliary electrodes and exposes at least portions of the pixel and auxiliary electrodes. The spacer corresponds to portions of the auxiliary electrode and pixel defining layer and exposes at least a portion of the auxiliary electrode. The light emitting layer is on the pixel electrode. The opposite electrode is on the light emitting layer and the spacer and is in contact with the auxiliary electrode.

First claim

What is claimed is:

1. An organic light emitting display device, comprising:
a pixel electrode and an auxiliary electrode on a same layer, the pixel electrode and the auxiliary electrode separated and electrically isolated from each other;
a pixel defining layer on the pixel electrode and the auxiliary electrode, the pixel defining layer including a first opening exposing a portion of the pixel electrode and a second opening exposing a portion of the auxiliary electrode;
a spacer on the pixel defining layer so as to correspond to portions of the auxiliary electrode and the pixel defining layer, the spacer including a third opening exposing the portion of the auxiliary electrode and a portion of the spacer surrounding the third opening;
a light emitting layer on the pixel electrode; and
an opposite electrode on the light emitting layer and the spacer, the opposite electrode in contact with the auxiliary electrode through the second opening and the third opening by passing through the spacer.

2. The display device as claimed in claim 1 , wherein a contact portion between the opposite electrode and the auxiliary electrode is surrounded by the spacer in a direction crossing a surface of the auxiliary electrode facing the opposite electrode.

3. The display device as claimed in claim 1 , wherein the third opening overlaps a contact portion between the opposite electrode and the auxiliary electrode.

4. The display device as claimed in claim 1 , wherein the third opening has a diameter greater than a diameter of the second opening.

5. The display device as claimed in claim 1 , further comprising:
a first intermediate layer on at least a portion of a top surface of the pixel defining layer, a top surface of the spacer, the pixel electrode, and the auxiliary electrode, wherein the first intermediate layer has a first hole exposing at least a portion of the auxiliary electrode so that the opposite electrode contacts the auxiliary electrode via the first hole.

6. The display device as claimed in claim 5 , wherein the first hole exposes only a portion of the auxiliary electrode.

7. The display device as claimed in claim 5 , further comprising:
a second intermediate layer between the first intermediate layer and the opposite electrode, wherein the second intermediate layer has a second hole corresponding to the first hole so that the opposite electrode contacts the auxiliary electrode via the first hole and the second hole.

8. The display device as claimed in claim 7 , wherein the second hole has a center which coincides with a center of the first hole.

9. The display device as claimed in claim 1 , wherein the spacer and the pixel defining layer include a same material.

10. The display device as claimed in claim 1 , wherein the pixel electrode and the auxiliary electrode include a same material.

11. The display device as claimed in claim 1 , wherein the third opening of the spacer is in a middle region of the spacer.

12. The display device as claimed in claim 1 , wherein the third opening of the spacer is entirely enclosed by the spacer.

13. An organic light emitting display device, comprising:
an auxiliary electrode;
an insulating layer covering the auxiliary electrode and including an auxiliary electrode hole exposing the auxiliary electrode;
a pixel electrode on the insulating layer and electrically insulated from the auxiliary electrode;
a pixel defining layer on the insulating layer, the pixel defining layer including a first opening exposing a portion of the pixel electrode and a second opening exposing a portion of the auxiliary electrode exposed via the auxiliary electrode hole;
a spacer on the pixel defining layer so as to correspond to portions of the auxiliary electrode and the pixel defining layer, the spacer including a third opening exposing the portion of the auxiliary electrode and a portion of the spacer surrounding the third opening;
a light emitting layer on the pixel electrode; and
an opposite electrode on the light emitting layer and the spacer, the opposite electrode in contact with the auxiliary electrode through the second and third openings by passing through the spacer.

14. The display device as claimed in claim 13 , wherein a contact portion between the opposite electrode and the auxiliary electrode is surrounded by the spacer in a direction crossing a surface of the auxiliary electrode facing the opposite electrode.

15. The display device as claimed in claim 14 , wherein the third opening overlaps the contact portion between the opposite electrode and the auxiliary electrode.

16. The display device as claimed in claim 13 , wherein:
the third opening has a diameter greater than a diameter of the second opening, and
the spacer forms a step with the pixel defining layer at a portion adjacent to the second and third openings.

17. The display device as claimed in claim 13 , further comprising:
a first intermediate layer on at least a portion of a top surface of the pixel defining layer, a top surface of the spacer, the pixel electrode, and the auxiliary electrode, wherein the first intermediate layer includes a first hole exposing at least a portion of the auxiliary electrode so that the opposite electrode contacts the auxiliary electrode via the first hole.

18. The display device as claimed in claim 17 , wherein the first hole exposes only a portion of the auxiliary electrode.

19. The display device as claimed in claim 17 , further comprising:
a second intermediate layer between the first intermediate layer and the opposite electrode, the second intermediate layer having a second hole corresponding to the first hole so that the opposite electrode contacts the auxiliary electrode via the first hole and the second hole.

20. The display device as claimed in claim 13 , wherein the pixel electrode and the auxiliary electrode include a same material.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Wonse

Classifications

• H01L51/5228 Primary

  Electricity · mapped topic

• H01L51/5056

  Electricity · mapped topic

• H01L51/5044

  Electricity · mapped topic

• H01L51/5008

  Electricity · mapped topic

• H01L51/5212

  Electricity · mapped topic