Display device

Patent metadata

Field	Value
Publication number	US-10325970-B2
Application number	US-201715838091-A
Country	US
Kind code	B2
Filing date	Dec 11, 2017
Priority date	Jun 19, 2017
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

A display device including a first pixel electrode and a second pixel electrode disposed adjacent to each other on a substrate; a pixel defining layer including a first opening corresponding to the first pixel electrode, a second opening corresponding to the second pixel electrode, and a first convex portion arranged adjacent to the first opening; a first intermediate layer arranged on the first pixel electrode to correspond to the first opening and including a first emission layer; and a first conductive inorganic layer arranged on the first intermediate layer to correspond to the first opening. At least one end of the first conductive inorganic layer extends beyond an end of the first intermediate layer and is disposed on the pixel defining layer between the first opening and the second opening.

First claim

What is claimed is:

1. A display device comprising:
a first pixel electrode and a second pixel electrode disposed adjacent to each other on a substrate;
a pixel defining layer including a first opening corresponding to the first pixel electrode, a second opening corresponding to the second pixel electrode, a first convex portion adjacent to the first opening, and a second convex portion adjacent to the second opening;
a first intermediate layer disposed on the first pixel electrode and arranged to correspond to the first opening and including a first emission layer; and
a first conductive inorganic layer disposed on the first intermediate layer and arranged to correspond to the first opening,
wherein at least one end of the first conductive inorganic layer extends beyond an end of the first intermediate layer and is disposed on the pixel defining layer between a peak of the first convex portion and a peak of the second convex portion.

2. The display device of claim 1 , wherein the first convex portion comprises a first lateral surface directed toward the first opening and a second lateral surface opposite to the first lateral surface, and the peak of the first convex portion is between the first lateral surface and the second lateral surface.

3. The display device of claim 2 , wherein the at least one end of the first conductive inorganic layer extends over the second lateral surface beyond the peak of the first convex portion.

4. The display device of claim 2 , wherein an end of the first intermediate layer extends over the second lateral surface beyond the peak of the first convex portion.

5. The display device of claim 2 , wherein an angle between the second lateral surface and a main surface of the substrate is less than 90°.

6. The display device of claim 1 , wherein the at least one end of the first conductive inorganic layer directly contacts the pixel defining layer.

7. The display device of claim 1 , wherein the at least one end of the first conductive inorganic layer extends beyond an end of the first intermediate layer by 0.5 μm or more.

8. The display device of claim 1 , wherein the first conductive inorganic layer comprises a metal layer including silver (Ag), magnesium (Mg), aluminum (Al), ytterbium (Yb), calcium (Ca), lithium (Li), gold (Au), or a compound thereof.

9. The display device of claim 1 , wherein the first conductive inorganic layer comprises a transparent conductive oxide (TCO).

10. The display device of claim 1 , wherein the first intermediate layer further comprises at least one of a first functional layer disposed between the first pixel electrode and the first emission layer and a second functional layer disposed between the first emission layer and the first conductive inorganic layer.

11. A display device comprising:
a first pixel electrode and a second pixel electrode disposed adjacent to each other;
a pixel defining layer including a first opening corresponding to the first pixel electrode, a second opening corresponding to the second pixel electrode, a first convex portion adjacent to the first opening, and a second convex portion adjacent to the second opening;
a first intermediate layer disposed on the first pixel electrode and including a first emission layer;
a second intermediate layer disposed on the second pixel electrode and including a second emission layer;
a first conductive inorganic layer disposed on the first intermediate layer and configured to cover an end of the first intermediate layer; and
a second conductive inorganic layer disposed on the second intermediate layer and configured to cover an end of the second intermediate layer,
wherein at least one end of the first conductive inorganic layer and at least one end of the second conductive inorganic layer are arranged between a peak of the first convex portion and a peak of the second convex portion.

12. The display device of claim 11 , wherein at least one end of the first conductive inorganic layer extends over an end of the first intermediate layer and directly contacts the pixel defining layer.

13. The display device of claim 11 , wherein at least one end of the first conductive inorganic layer extends farther toward the second convex portion than an end of the first intermediate layer.

14. The display device of claim 11 , wherein:
the first convex portion comprises a first lateral surface directed toward the first opening and a second lateral surface opposite to the first lateral surface, and a peak of the first convex portion is arranged between the first lateral surface and the second lateral surface; and
at least one end of the first conductive inorganic layer extends over the second lateral surface beyond the peak of the first convex portion.

15. The display device of claim 11 , wherein the pixel definition layer further comprises an additional convex portion arranged between the first convex portion and the second convex portion.

16. The display device of claim 11 , further comprising a common opposite electrode disposed on the first conductive inorganic layer and the second conductive inorganic layer and configured to cover the first conductive inorganic layer and the second conductive inorganic layer.

17. The display device of claim 11 , wherein at least one of the first conductive inorganic layer and the second conductive inorganic layer comprises at least one of a conductive metal layer and a conductive oxide layer.

18. The display device of claim 17 , wherein the conductive metal layer comprises silver (Ag), magnesium (Mg), aluminum (Al), ytterbium (Yb), calcium (Ca), lithium (Li), gold (Au), or a compound thereof.

19. The display device of claim 17 , wherein the conductive oxide layer comprises at least one of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In 2 O 3 ), indium gallium oxide (IGO), and aluminum zinc oxide (AZO).

Assignees

• Samsung Display Co Ltd

Inventors

• Bang Hyunsung
• Kim Arong
• Park Jungsun
• Lee Duckjung
• Choung Jiyoung

Classifications

• H01L51/0011

  Electricity · mapped topic

• H01L2227/323

  Electricity · mapped topic

• H01L27/3216

  Electricity · mapped topic

• H01L27/3246 Primary

  Electricity · mapped topic

• H01L51/5225

  Electricity · mapped topic