Organic light emitting diode display device

Patent metadata

Field	Value
Publication number	US-10910587-B2
Application number	US-201715730847-A
Country	US
Kind code	B2
Filing date	Oct 12, 2017
Priority date	Oct 12, 2016
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

An organic light emitting diode display device includes an auxiliary electrode spaced apart from a plurality of first electrodes on a substrate. A first light emitting portion is on the first electrode. A charge generation layer is on the first light emitting portion. A second light emitting portion is on the charge generation layer. A second electrode is on the second light emitting portion and is electrically connected to the auxiliary electrode. The second electrode is insulated from the charge generation layer.

First claim

What is claimed is:

1. An organic light emitting diode display device, comprising:
a substrate;
a plurality of first electrodes on the substrate;
a pixel defining layer to define a light emitting area;
an auxiliary electrode on the substrate and spaced apart from the first electrodes;
a first light emitting portion on the first electrode;
a first charge generation layer on the first light emitting portion, the first charge generation layer extending from the light emitting area to an upper surface of the pixel defining layer;
a second light emitting portion on the first charge generation layer; and
a second electrode on the second light emitting portion and electrically connected to the auxiliary electrode, wherein
a first opening is defined by the pixel defining layer and exposes at least a portion of the auxiliary electrode between at least two of the first electrodes,
a second opening is defined by the first charge generation layer and overlaps the first opening, a side surface of the first charge generation layer exposed by the second opening is on the upper surface of the pixel defining layer,
a third opening is defined by the second light emitting portion and overlaps the first and second openings,
the second electrode is connected to the auxiliary electrode through the first, second and third openings,
a width of the second opening is greater than a width of the third opening, and
the second light emitting portion covers an upper surface and the side surface of the first charge generation layer in a cross-section view, and
the pixel defining layer covers a side of the auxiliary electrode.

2. The display device as claimed in claim 1 , wherein the first charge generation layer does not contact the second electrode.

3. The display device as claimed in claim 1 , wherein the first electrodes and the auxiliary electrode are on a same layer.

4. The display device as claimed in claim 1 , wherein the first electrodes and the auxiliary electrode include a same material.

5. The display device as claimed in claim 1 , wherein a width of the second opening is greater than a width of the first opening, and the width of the third opening is substantially equal to the width of the first opening.

6. The display device as claimed in claim 5 , wherein the second electrode contacts the auxiliary electrode at the first opening.

7. The display device as claimed in claim 5 , wherein the first opening has a circular shape, a linear shape, or a lattice shape on a plane.

8. The display device as claimed in claim 5 , wherein the second opening has a circular shape, a linear shape, or a lattice shape on a plane.

9. The display device as claimed in claim 1 , further comprising:
at least one of a hole injection layer and a hole transport layer between the first electrodes and the first light emitting portion.

10. The display device as claimed in claim 1 , further comprising:
at least one of an electron transport layer and an electron injection layer between the second light emitting portion and the second electrode.

11. The display device as claimed in claim 1 , further comprising:
a third light emitting portion between the second light emitting portion and the second electrode.

12. The display device as claimed in claim 11 , further comprising:
a second charge generation layer between the second light emitting portion and the third light emitting portion.

13. The display device as claimed in claim 12 , wherein each of the first charge generation layer and the second charge generation layer include at least one of an n-type layer and a p-type layer.

14. The display device as claimed in claim 1 , further comprising:
a capping layer on the second electrode; and
a thin film encapsulation layer on the capping layer and including:
at least one inorganic layer; and
at least one organic layer alternately arranged with the at least one inorganic layer.

15. The display device as claimed in claim 1 , further comprising:
a capping layer on the second electrode;
a filler on the capping layer; and
an encapsulation substrate on the filler.

Assignees

• Samsung Display Co Ltd

Inventors

• Pyo Sangwoo
• Oh Ilsoo
• Yoon Jihwan
• Lee Changmin
• Choi Sungjin

Classifications

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K50/131 Primary

  with spacer layers between the electroluminescent layers · CPC title

• H10K59/80522 Primary

  combined with auxiliary electrodes · CPC title

• H10K59/879

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