Display device

Patent metadata

Field	Value
Publication number	US-10134829-B2
Application number	US-201715811838-A
Country	US
Kind code	B2
Filing date	Nov 14, 2017
Priority date	Nov 23, 2016
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

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 non-display area adjacent to a display area;
a thin film transistor on the display area and a display element electrically connected to the thin film transistor;
a thin film encapsulation layer covering the display element;
an organic insulating layer between the thin film transistor and the display element and extending to the non-display area, the organic insulating layer including 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;
a power voltage line in the non-display area and including a portion corresponding to the division region; and
a protective layer covering an upper surface of the power voltage line in the division region.

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

3. The display device as claimed in claim 1 , further comprising:
a driving voltage line in the display area and electrically connected to the thin film transistor, wherein the display element includes:
a pixel electrode,
an opposite electrode facing the pixel electrode, and
an intermediate layer between the pixel electrode and the opposite electrode, and wherein the organic insulating layer is between the driving voltage line and the pixel electrode.

4. The display device as claimed in claim 1 , wherein the power voltage line includes:
a first conductive layer; and
a second conductive layer on the first conductive layer and contacting the first conductive layer.

5. The display device as claimed in claim 4 , wherein an end portion of the second conductive layer corresponding to the division region covers a lateral surface of a portion of the first conductive layer corresponding to the division region.

6. The display device as claimed in claim 4 , 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
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 lower driving voltage line and the upper driving voltage line.

7. The display device as claimed in claim 6 , wherein the insulating layer includes an organic insulating material.

8. The display device as claimed in claim 6 , 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.

9. The display device as claimed in claim 4 , wherein:
at least one of the first conductive layer or the second conductive layer is a multi-layer, and
the multi-layer includes a first layer including titanium, a second layer including aluminum, and a third layer including titanium.

10. The display device as claimed in claim 1 , wherein:
the thin film encapsulation layer includes at least one inorganic encapsulation layer and at least one organic encapsulation layer,
a portion of the inorganic encapsulation layer corresponding to the division region is covered with the thin film encapsulation layer.

11. The display device as claimed in claim 1 , wherein the protective layer covers a portion of an upper surface of at least one of the central portion or the outer portion of the organic insulating layer.

12. The display device as claimed in claim 1 , wherein the power voltage line is below the organic insulating layer.

13. The display device as claimed in claim 12 , wherein the central portion and the outer portion of the organic insulating layer contact an upper surface of the power voltage line.

14. The display device as claimed in claim 1 , further comprising:
a pad portion corresponding to one edge of the substrate,
wherein the power voltage line includes a connection portion extending from one side of the display area to the pad portion and wherein at least a portion of the connection portion crosses the division region.

15. The display device as claimed in claim 1 , further comprising:
a dam inside the division region and surrounding the display area.

16. The display device as claimed in claim 15 , wherein the dam is spaced apart from the central portion and the outer portion of the organic insulating layer.

17. The display device as claimed in claim 1 , further comprising:
an additional insulating layer including a first insulating portion and a second insulating portion respectively over the central portion and the outer portion, wherein the additional insulating layer including a separation region corresponding to the division region.

18. The display device as claimed in claim 17 , wherein the display element includes a pixel electrode, an opposite electrode facing the pixel electrode, and an intermediate layer between the pixel electrode and the opposite electrode, and wherein the intermediate layer includes an emission layer.

19. The display device as claimed in claim 18 , further comprising:
a pixel-defining layer includes an opening exposing the pixel electrode,
wherein the additional insulating layer includes a same material as the pixel-defining layer.

20. The display device as claimed in claim 1 , wherein:
the power voltage line includes a first power voltage line and a second power voltage line to receive different voltages,
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.

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

• H01L27/3258

  Electricity · mapped topic

• H01L27/3279 Primary

  Electricity · mapped topic

• H01L51/5253

  Electricity · mapped topic

• H10K59/131 Primary

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