Display panel including grooves surrounded by signal lines

1. A display device comprising:

a substrate including:

an opening area in a display area; and

a non-display area between the display area and the opening area;

signal wires disposed in the non-display area to bypass the opening area; and

at least one groove disposed between the signal wires.

2. The display device of claim 1 , wherein

the at least one groove includes two or more grooves, and

each of the grooves is disposed between adjacent ones of the signal wires.

3. The display device of claim 1 , wherein the substrate includes a first base layer, a first inorganic layer, a second base layer, and a second inorganic layer, which are sequentially stacked on each other.

4. The display device of claim 3 , wherein a bottom of the at least one groove is disposed on a surface of the second base layer.

5. The display device of claim 3 , wherein a bottom of the at least one groove is disposed in part of the second base layer.

6. The display device of claim 5 , wherein

the signal wires include scan lines and data lines,

the scan lines are alternately arranged with an insulating layer disposed between the scan lines, and

the data lines are alternately arranged with an insulating layer disposed between the data lines.

7. The display device of claim 6 , wherein

the scan lines include:

first scan lines disposed on a first insulating layer on the second inorganic layer; and

second scan lines disposed on a second insulating layer on the first insulating layer, and

the data lines include:

first data lines disposed on a third insulating layer on the second insulating layer; and

second data lines disposed on a fourth insulating layer on the third insulating layer.

8. The display device of claim 7 , wherein

the first scan lines and the first data lines are disposed to overlap each other in a thickness direction of the display device, and

the second scan lines and the second data lines are disposed to overlap each other in the thickness direction.

9. The display device of claim 7 , wherein the at least one groove comprises a plurality of grooves that are disposed between the first scan lines and the second scan lines and between the first data lines and the second data lines.

10. The display device of claim 7 , wherein a width of the at least one groove in the second base layer is greater than a width of the at least one groove in the second inorganic layer.

11. The display device of claim 7 , wherein the third insulating layer covers an inner surface of the at least one groove.

12. The display device of claim 3 , further comprising:

a fifth insulating layer disposed on the signal wires; and

an organic light-emitting layer and a counter electrode layer sequentially stacked on each other on the fifth insulating layer.

13. The display device of claim 12 , wherein the organic light-emitting layer and the counter electrode layer are sequentially stacked on each other on a bottom of the at least one groove.

14. The display device of claim 1 , further comprising:

a thin-film encapsulation layer covering the display area and the non-display area.

15. The display device of claim 14 , wherein the thin-film encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer, which are sequentially stacked on each other.

16. The display device of claim 15 , wherein the first inorganic encapsulation layer covers an inner surface of the at least one groove.

17. The display device of claim 15 , wherein the organic encapsulation layer fills the at least one groove.

18. The display device of claim 15 , further comprising:

a partition wall disposed between the opening area and an area where the signal wires are disposed.

19. The display device of claim 18 , wherein the first inorganic encapsulation layer and the second inorganic encapsulation layer are sequentially stacked on each other on the partition wall.

20. The display device of claim 18 , further comprising:

a planarization layer disposed on a portion of the second inorganic encapsulation layer, wherein the portion of the second inorganic encapsulation layer is disposed between the partition wall and the opening area.