Display device

Patent metadata

Field	Value
Publication number	US-12089432-B2
Application number	US-202217698193-A
Country	US
Kind code	B2
Filing date	Mar 18, 2022
Priority date	Aug 18, 2021
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

A display device includes a substrate having a display area and a non-display area surrounding the display area. A drain electrode is disposed in the display area and is positioned adjacent to the non-display area. A light emitting element is disposed in the display area and is connected to the drain electrode. The light emitting element is disposed farther from the non-display area than the drain electrode. A plurality of first dams is disposed in the display area and is positioned between the drain electrode and the light emitting element. Each of the plurality of first dams are spaced apart from each other.

First claim

What is claimed is:

1. A display device, comprising:
a substrate including a display area and a non-display area surrounding the display area;
a drain electrode disposed in the display area and positioned adjacent to the non-display area;
a light emitting element disposed in the display area and connected to the drain electrode, the light emitting element is disposed farther from the non-display area than the drain electrode; and
a plurality of first dams disposed in the display area and positioned between the drain electrode and the light emitting element, each of the plurality of first dams are spaced apart from each other.

2. The display device of claim 1 , wherein, in a plan view, a shape of the plurality of first dams becomes narrower in a direction from the display area towards the non-display area.

3. The display device of claim 1 , wherein, in a plan view, the plurality of first dams are arranged along an imaginary line extending in a first direction.

4. The display device of claim 1 , wherein, in a plan view, the plurality of first dams are arranged in a zigzag form in relation to an imaginary line extending in a first direction.

5. The display device of claim 1 , wherein, in a cross-sectional view, a sidewall of each of the plurality of first dams that is positioned in a direction towards the display area extends in a vertical direction that is perpendicular to the substrate.

6. The display device of claim 1 , wherein, in a cross-sectional view, a height of each of the plurality of first dams gradually decreases in a direction from the display area towards the non-display area.

7. The display device of claim 1 , further comprising a second dam disposed on the non-display area of the substrate.

8. The display device of claim 1 , further comprising:
a thin film encapsulation layer disposed on the light emitting element, and
the thin film encapsulation layer includes:
a first inorganic layer disposed on the light emitting element;
an organic layer disposed on the first inorganic layer; and
a second inorganic layer disposed on the organic layer.

9. The display device of claim 8 , wherein:
the plurality of first dams prevents the organic layer from overflowing from the display area to the non-display area; and
the organic layer is also disposed in an area between adjacent first dams of the plurality of first dams.

10. The display device of claim 1 , wherein a low power voltage is applied to the drain electrode.

11. A display device, comprising:
a substrate including a display area and a non-display area surrounding the display area;
a drain electrode disposed in the display area and positioned adjacent to the non-display area;
a cathode electrode disposed in the display area and connected to the drain electrode, the cathode electrode is disposed farther from the non-display area than the drain electrode; and
a plurality of first dams disposed in the display area and positioned between the drain electrode and the cathode electrode, each of the plurality of first dams are spaced apart from each other,
wherein the cathode electrode is disposed to cover the plurality of first dams.

12. The display device of claim 11 , wherein the cathode electrode is also disposed in an area between adjacent first dams of the plurality of first dams.

13. The display device of claim 11 , wherein, in a plan view, a shape of the plurality of first dams becomes narrower in a direction from the display area towards the non-display area.

14. The display device of claim 11 , wherein, in a cross-sectional view, a sidewall of each of the plurality of first dams that is positioned in a direction towards the display area extends in a vertical direction that is perpendicular to the substrate.

15. The display device of claim 14 , wherein the cathode electrode is disconnected from the sidewall of each of the plurality of first dams that is positioned in the direction towards the display area.

16. The display device of claim 11 , wherein, in a cross-sectional view, a height of each of the plurality of first dams gradually decreases in a direction from the display area towards the non-display area.

17. The display device of claim 11 , further comprising a second dam disposed on the non-display area of the substrate.

18. The display device of claim 17 , wherein:
the second dam includes a plurality of second dams; and
each of the plurality of second dams are spaced apart from each other.

19. The display device of claim 11 , further comprising:
a thin film encapsulation layer disposed on the cathode electrode, and
the thin film encapsulation layer includes:
a first inorganic layer disposed on the cathode electrode;
an organic layer disposed on the first inorganic layer; and
a second inorganic layer disposed on the organic layer.

20. The display device of claim 19 , wherein:
the plurality of first dams prevents the organic layer from overflowing from the display area to the non-display area; and
the organic layer is also disposed in an area between adjacent first dams of the plurality of first dams.

Assignees

• Samsung Display Co Ltd

Inventors

• Kwon Ohjune
• Sung Woo Yong
• Hyun Jinho

Classifications

• H10K59/873 Primary

  Encapsulations · CPC title

• H10K59/131

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

• H10K59/124 Primary

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

• H10K59/8731 Primary

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

• H10K50/844 Primary

  Encapsulations · CPC title