Display device

Patent metadata

Field	Value
Publication number	US-11043551-B2
Application number	US-202016745638-A
Country	US
Kind code	B2
Filing date	Jan 17, 2020
Priority date	Nov 23, 2016
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

A display device includes a non-display area adjacent a display area, a thin film transistor, a display element, a thin film encapsulation layer, an organic insulating layer, a power voltage line, and a protective layer. The thin film transistor is on the display area and is connected to the display element. The thin film encapsulation layer covers the display element. The organic insulating layer is between the thin film transistor and display element and extends to the non-display area. The organic insulating layer includes a central portion corresponding to the display area, an outer portion surrounding the central portion, and a division region dividing the central portion and the outer portion and surrounding the display area. The power voltage line is in the non-display area and includes a portion corresponding to the division region. The protective layer covers an upper surface of the power voltage line in the division region.

First claim

What is claimed is:

1. A display device, comprising:
a substrate including a display area and a non-display area adjacent to the display area;
a thin film transistor on the display area;
a display element electrically connected to the thin film transistor;
a thin film encapsulation layer covering the display element;
a power voltage line in the non-display area, the power voltage line including a first conductive layer and a second conductive layer disposed on and contacting the first conductive layer, wherein an end portion of the second conductive layer covers a lateral surface of a portion of the first conductive layer; and
a protective layer covering an upper surface of the power voltage line.

2. The display device of claim 1 , wherein the protective layer includes an inorganic insulating material.

3. The display device of claim 1 , wherein
the thin film transistor comprises a semiconductor layer, and a gate electrode overlapping the semiconductor layer, and
the display device further comprises an interlayer insulating layer on the gate electrode of the thin film transistor, and wherein the power voltage line is on the interlayer insulating layer.

4. The display device of claim 1 , further comprising:
a lower driving voltage line and an upper driving voltage line in the display area and each electrically connected to the thin film transistor; and
an insulating layer between the lower driving voltage line and the upper driving voltage line, the insulating layer including a contact hole to connect the upper driving voltage line to the lower driving voltage line.

5. The display device of claim 4 , wherein the insulating layer includes an organic insulating material.

6. The display device of claim 4 , wherein
the first conductive layer includes a same material as the lower driving voltage line, and
the second conductive layer includes a same material as the upper driving voltage line.

7. The display device of claim 1 , wherein
the thin film encapsulation layer includes at least one inorganic encapsulation layer and at least one organic encapsulation layer, and
a portion of the protective layer is covered with the thin film encapsulation layer.

8. The display device of claim 1 , further comprising:
a dam surrounding the display area and overlapping a portion of the power voltage line.

9. The display device of claim 8 , further comprising:
an organic insulating layer including a central portion in the display area and an outer portion in the non-display area, wherein
the central portion and the outer portion are spaced apart from each other with a division region therebetween, and
a portion of the dam is located in the division region and is apart from the central portion and the outer portion.

10. The display device of claim 9 , wherein
the display element comprises a first electrode, a second electrode facing the first electrode, and an intermediate layer between the first electrode and the second electrode, and
the intermediate layer includes an emission layer.

11. The display device of claim 10 , further comprising:
a pixel-defining layer including an opening exposing the pixel electrode, wherein
the dam includes the same material as the organic insulating layer or the pixel-defining layer.

12. The display device of claim 9 , wherein
the power voltage line includes a first power voltage line and a second power voltage line that receive different voltages from each other, and
the central portion of the organic insulating layer includes an auxiliary division region between a portion of the first power voltage line and a portion of the second power voltage line and overlaps the portion of the first power voltage line and the portion of the second power voltage line.

13. A display device, comprising:
a substrate including a display area and a non-display area adjacent to the display area;
a thin film transistor on the display area;
a display element electrically connected to the thin film transistor;
a thin film encapsulation layer covering the display element;
a power voltage line in the non-display area, the power voltage line including a first conductive layer and a second conductive layer disposed on and contacting the first conductive layer;
an insulating layer covering a portion of the second conductive layer of the power voltage line; and
a protective layer on the insulating layer and covering an upper surface of at least a part of the power voltage line.

14. The display device of claim 13 , wherein
the insulating layer includes an organic insulating material, and
the protective layer includes an inorganic insulating material.

15. The display device of claim 13 , wherein an end portion of the second conductive layer of the power voltage line covers a lateral surface of a portion of the first conductive layer.

16. The display device of claim 13 , wherein
the thin film transistor comprises a semiconductor layer and a gate electrode overlapping the semiconductor layer, and
the display device further comprises an interlayer insulating layer on the gate electrode of the thin film transistor, and wherein the power voltage line is on the interlayer insulating layer.

17. The display device of claim 13 , further comprising:
a lower driving voltage line and an upper driving voltage line in the display area and electrically connected to the thin film transistor; and
a first insulating layer between the lower driving voltage line and the upper driving voltage line, the first insulating layer including a contact hole to connect the lower driving voltage line and the upper driving voltage line.

18. The display device of claim 13 , wherein
the thin film encapsulation layer includes at least one inorganic encapsulation layer and at least one organic encapsulation layer, and
a portion of the protective layer is covered with the thin film encapsulation layer.

19. The display device of claim 13 , further comprising:
a dam surrounding the display area and overlapping a portion of the power voltage line.

20. The display device of claim 19 , wherein
the insulating layer includes an inner portion and an outer portion being spaced apart from each other with a division region therebetween, and
at least a portion of the dam is located in the division region and is apart from the central portion and the outer portion.

21. The display device of claim 19 , wherein
the display element comprises:
a first electrode;
a pixel-defining layer includes an opening overlapping the pixel electrode;
a second electrode facing the first electrode; and
an intermediate layer between the first electrode and the second electrode and including an emission layer, and
the dam includes the same material as at least one of the insulating layer or the pixel-defining layer.

22. The display device of claim 20 , wherein
the power voltage line includes a first power voltage line and a second power voltage line that receive different voltages from each other, and
the inner portion of the insulating layer includes an auxiliary division region between a portion of the first power voltage line and a portion of the second power voltage line and overlaps the portion of the first power voltage line and the portion of the second power voltage line.

Assignees

• Samsung Display Co Ltd

Inventors

• Shin Juncheol
• Lee Jeongho
• Kwon Hokyoon
• Kim Yanghee

Classifications

• H10K59/8731

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

• H10K59/131 Primary

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

• H10K59/1315

  comprising structures specially adapted for lowering the resistance · CPC title

• H10K59/124 Primary

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

• H01L27/3279 Primary

  Electricity · mapped topic