Display device

Patent metadata

Field	Value
Publication number	US-12245476-B2
Application number	US-202217737132-A
Country	US
Kind code	B2
Filing date	May 5, 2022
Priority date	Sep 16, 2021
Publication date	Mar 4, 2025
Grant date	Mar 4, 2025

Abstract

A display device includes an auxiliary wiring located on a substrate; an insulating layer arranged on the auxiliary wiring, overlapping the auxiliary wiring in a plan view, and including an opening having a width greater than a width of the auxiliary wiring; a first electrode located on the insulating layer; a bank layer including an emission opening that overlaps the first electrode in a plan view; an intermediate layer overlapping the first electrode through an emission opening in a plan view and including an emission layer; a second electrode on the intermediate layer; and an auxiliary layer arranged on the second electrode, wherein the auxiliary wiring includes sub-layers, and each of the second electrode and the auxiliary layer contacts a side surface of one of the sub-layers through the opening of the insulating layer.

First claim

What is claimed is:

1. A display device comprising:
an auxiliary wiring located on a substrate;
an insulating layer arranged on the auxiliary wiring, overlapping the auxiliary wiring in a plan view, and comprising an opening having a width greater than a width of the auxiliary wiring;
a first electrode located on the insulating layer;
a bank layer comprising an emission opening that overlaps the first electrode in the plan view;
an intermediate layer overlapping the first electrode through the emission opening in the plan view and comprising an emission layer;
a second electrode located on the intermediate layer; and
an auxiliary layer arranged on the second electrode, wherein
the auxiliary wiring comprises sub-layers, and
each of the second electrode and the auxiliary layer contacts a side surface of one of the sub-layers through the opening of the insulating layer.

2. The display device of claim 1 , wherein
the sub-layers of the auxiliary wiring comprise:
a main sub-layer;
an upper layer arranged on the main sub-layer and having a tip protruding from a part in which a side surface and an upper surface of the main sub-layer meet each other; and
a lower layer arranged under the main sub-layer,

each of the second electrode and the auxiliary layer directly contacts the side surface of the main sub-layer.

3. The display device of claim 2 , wherein a thickness of the main sub-layer is greater than at least one of a thickness of the upper layer and a thickness of the lower layer.

4. The display device of claim 2 , wherein
the intermediate layer overlaps the auxiliary wiring in the plan view, and
a portion of the intermediate layer is located on the auxiliary wiring and is separated from another portion of the intermediate layer around the auxiliary wiring by the tip.

5. The display device of claim 2 , wherein
the second electrode overlaps the first electrode and the auxiliary wiring in the plan view, and
a portion of the second electrode is located on the auxiliary wiring and is separated from another portion of the second electrode around the auxiliary wiring by the tip.

6. The display device of claim 2 , wherein
the auxiliary layer overlaps the auxiliary wiring in the plan view, and
a portion of the auxiliary layer is located on the auxiliary wiring and is separated from another portion of the auxiliary layer around the auxiliary wiring by the tip.

7. The display device of claim 2 , wherein the main sub-layer comprises at least one of copper, aluminum, platinum, palladium, silver, magnesium, gold, nickel, neodymium, iridium, chromium, lithium, calcium, and molybdenum.

8. The display device of claim 2 , wherein at least one of the upper layer and the lower layer comprises at least one of indium tin oxide, titanium, molybdenum, and tungsten.

9. The display device of claim 1 , wherein
the auxiliary layer overlaps the auxiliary wiring and the opening in the plan view, and
the auxiliary layer has a width greater than the width of the auxiliary wiring and less than the width of the opening.

10. The display device of claim 1 , wherein
the auxiliary layer overlaps the auxiliary wiring and the opening in the plan view, and
the auxiliary layer and the second electrode have a same area in the plan view beyond the opening.

11. The display device of claim 1 , wherein the auxiliary layer comprises a conductive material.

12. The display device of claim 1 , further comprising:
a lower insulating layer arranged under the auxiliary wiring,
wherein a portion of the intermediate layer directly contacts a portion of an upper surface of the lower insulating layer through the opening of the insulating layer.

13. The display device of claim 1 , wherein on a plane, the auxiliary wiring comprises protrusions protruding in a direction intersecting an extension direction of the auxiliary wiring.

14. The display device of claim 13 , wherein
the second electrode and a side surface of the auxiliary wiring contact each other in a first contact region,
the auxiliary layer and the side surface of the auxiliary wiring contact each other in a second contact region, and
the first contact region and the second contact region are continuous along at least one of the protrusions.

15. A display device comprising:
a display area and a non-display area outside the display area;
a common voltage supply line arranged in the non-display area;
an auxiliary wiring electrically connected to the common voltage supply line and arranged in the display area;
an insulating layer arranged on the auxiliary wiring, overlapping the auxiliary wiring in a plan view, and comprising an opening having a width greater than a width of the auxiliary wiring;
a first electrode located on the insulating layer;
a bank layer comprising an emission opening that overlaps the first electrode in the plan view;
an intermediate layer overlapping the first electrode through the emission opening in the plan view and comprising an emission layer;
a second electrode located on the intermediate layer; and
an auxiliary layer arranged on the second electrode, wherein
the auxiliary wiring comprises sub-layers, and
each of the second electrode and the auxiliary layer contacts a side surface of one of the sub-layers through the opening of the insulating layer.

16. The display device of claim 15 , wherein the sub-layers of the auxiliary wiring comprise:
a main sub-layer;
an upper layer arranged on the main sub-layer and having a tip protruding from a part in which a side surface and an upper surface of the main sub-layer meet each other; and
a lower layer arranged under the main sub-layer,
wherein each of the second electrode and the auxiliary layer directly contacts the side surface of the main sub-layer.

17. The display device of claim 16 , wherein
the second electrode overlaps the first electrode and the auxiliary wiring in the plan view, and
a portion of the second electrode is located on the auxiliary wiring and is separated from another portion of the second electrode around the auxiliary wiring by the tip.

18. The display device of claim 16 , wherein
the auxiliary layer overlaps the auxiliary wiring in the plan view, and
a portion of the auxiliary layer is located on the auxiliary wiring and is separated from another portion of the auxiliary layer around the auxiliary wiring by the tip.

19. The display device of claim 15 , wherein
the auxiliary layer overlaps the auxiliary wiring and the opening in the plan view, and
the auxiliary layer has a width greater than the width of the auxiliary wiring and less than the width of the opening.

20. The display device of claim 15 , wherein
the auxiliary layer overlaps the auxiliary wiring and the opening in the plan view, and
the auxiliary layer and the second electrode have a same area in the plan view beyond the opening.

21. The display device of claim 16 , wherein the auxiliary layer comprises at least one of silver, magnesium, aluminum, platinum, palladium, gold, nickel, neodymium, iridium, chromium, lithium, calcium, molybdenum, indium tin oxide, gallium zinc oxide, and indium zinc oxide.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Jaeik
• Gwark Hyejin
• Kim Arong
• Park Jungsun
• Park Heemin
• Lee Yeonhwa
• Lee Joongu
• Hwang Kyuhwan

Classifications

• H10K59/80522

  combined with auxiliary electrodes · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/124

  Insulating layers formed between TFT elements and OLED elements · CPC title

• H10K59/131 Primary

  Interconnections, e.g. wiring lines or terminals · CPC title