Display device

1. A display device having a display area and a non-display area disposed in a vicinity of the display area and comprising a bending area, the display device comprising:

a substrate;

a third organic insulating layer disposed on the substrate;

an inorganic insulating layer disposed between the third organic insulating layer and the substrate and including an inorganic insulating opening which exposes the substrate;

a first organic insulating layer at least partially filling the inorganic insulating opening and contacting the substrate;

a second organic insulating layer disposed between the third organic insulating layer and the substrate; and

a trench structure disposed in the non-display area, the trench structure comprising an uncovered open top, sidewalls formed by the third organic insulating layer, and a bottom surface located in the bending area,

wherein the bending area is disposed on a side of the display area,

wherein the non-display area further includes a dam area between the bending area and the display area,

wherein a dam portion including the third organic insulating layer is disposed in the dam area,

wherein the inorganic insulating opening overlaps with the trench structure and a width of the inorganic insulating opening is greater than a width of the trench structure,

wherein the display device comprises a first side extending along a first direction and a second side extending along a second direction intersecting the first direction,

wherein the bending area is located in the first direction with respect to the display area,

wherein a length of the bending area is greater than a length of the trench in the second direction, and

wherein a width of the trench, in the first direction, is the same as a width of the bending area, in the first direction.

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

a first bending connection area disposed on a first side of the bending area and located between the bending area and the display area; and

a second bending connection area disposed on a second side of the bending area.

3. The display device of claim 2 , wherein the sidewalls of the trench structure comprise a first sidewall disposed on a first side of the trench structure and a second sidewall disposed on a second side of the trench structure.

4. The display device of claim 3 , wherein

the first sidewall is located in the first bending connection area, and

the second sidewall is located in the second bending connection area.

5. The display device of claim 3 , wherein the first sidewall is located at a boundary between the bending area and the first bending connection area, and

wherein the second sidewall is located at a boundary between the bending area and the second bending connection area.

6. The display device of claim 1 , wherein the bottom surface of the trench structure is formed by the second organic insulating layer.

7. The display device of claim 1 , wherein the bottom surface of the trench structure is formed by the third organic insulating layer, and wherein a thickness of the third organic insulating layer at the bottom surface of the trench structure is smaller than a thickness of the third organic insulating layer on the sidewalls of the trench structure.

8. The display device of claim 7 , wherein the bottom surface of the trench structure comprises an uneven structure.

9. The display device of claim 7 , wherein the bottom surface of the trench structure comprises a concavely curved surface.

10. The display device of claim 1 , wherein the trench structure comprises a plurality of sub-trench structures isolated from one another in the first direction.

11. The display device of claim 1 ,

wherein the first organic insulating layer completely fills the inorganic insulating opening and is disposed between the substrate and the third organic insulating layer.

12. The display device of claim 1 , wherein the trench structure completely overlaps with the inorganic insulating opening.