Display substrate and display device comprising same

1. A display substrate foldable based on a folding axis, the display substrate comprising:

one surface and other surface opposite to the one surface;

a first area including the folding axis and adjacent to the folding axis; and

a second area positioned farther from the folding axis than the first area,

wherein the display substrate is defined in a first direction corresponding to the folding axis and a second direction perpendicular to the first direction,

wherein the first area includes a first display panel installation area and a first bezel area positioned outside the first display panel installation area and closer to first and second side ends of the display substrate positioned in the first direction than the first display panel installation area,

wherein a first opening pattern is provided at the one surface or the other surface of the first display panel installation area,

wherein a second opening pattern is provided at the one surface or the other surface of the first bezel area,

wherein the second opening pattern is a first hole passing through the one surface and the other surface of the first bezel area,

wherein the first hole includes an inner area, and an outer area positioned closer to the one surface and the other surface than the inner area and extending in a depth direction from the one surface and the other surface, and

wherein a size of a first inner diameter in the outer area is greater than a size of a second inner diameter in the inner area.

2. The display substrate of claim 1 , wherein a display panel is disposed on the one surface, and

wherein the first opening pattern passes through the other surface and extends in a direction toward the one surface.

3. The display substrate of claim 1 , wherein the first opening pattern is formed in a depth of 0.5 times or less a thickness of the display substrate.

4. The display substrate of claim 1 , wherein a display panel is disposed on the one surface,

the first display panel installation area is defined as an area overlapping the display panel, and

the first bezel area is defined as an area that does not overlap the display panel.

5. The display substrate of claim 1 , wherein the display substrate includes third and fourth side ends positioned in the second direction,

wherein the second area includes a second display panel installation area and a second bezel area positioned outside the second display panel installation area and closer to first to fourth side ends than the second display panel installation area,

wherein a third opening pattern is provided at the one surface or the other surface of the second display panel installation area,

wherein a fourth opening pattern is provided at the one surface or the other surface of the second bezel area, and

wherein the fourth opening pattern is a second hole passing through the one surface and the other surface of the second bezel area.

6. The display substrate of claim 5 , wherein a display panel is disposed on the one surface, and

wherein the third opening pattern passes through the other surface and extends in a direction toward the one surface.

7. The display substrate of claim 5 , wherein a display panel is disposed on the one surface,

the second display panel installation area is defined as an area overlapping the display panel, and

the second bezel area is defined as an area that does not overlap the display panel.

8. The display substrate of claim 1 , comprising a hinge portion formed between the first area and the second area and formed with a third hole through which the first side end or the second side end of the display substrate is opened.

9. The display substrate of claim 1 , wherein the first or second opening pattern has a major axis in the first direction of the display substrate and a minor axis in the second direction of the display substrate.

10. The display substrate of claim 1 , wherein a size of an outer diameter of the first hole on the one surface or the other surface is formed greater than the size of the first inner diameter and the size of the second inner diameter.

11. The display substrate of claim 1 , wherein the size of the first inner diameter of the first hole extends from the one surface and the other surface toward the inner area and becomes smaller.

12. The display substrate of claim 1 , wherein an inner surface of the first hole corresponding to the outer area is formed with a curvature.

13. A display device comprising;

a display substrate foldable based on a folding axis; and

a display panel disposed above the display substrate,

wherein the display substrate includes one surface and other surface opposite to the one surface;

a first area including the folding axis and adjacent to the folding axis; and

a second area positioned farther from the folding axis than the first area;

wherein the display substrate is defined in a first direction corresponding to the folding axis and a second direction perpendicular to the first direction,

wherein the first area includes a first display panel installation area and a first bezel area positioned outside the first display panel installation area and closer to first and second side ends of the display substrate positioned in the first direction than the first display panel installation area,

wherein a first opening pattern is provided at the one surface or the other surface of the first display panel installation area, and

wherein a second opening pattern is provided at the one surface or the other surface of the first bezel area,

wherein the second opening pattern is a first hole passing through the one surface and the other surface of the first bezel area,

wherein the first hole includes an inner area, and an outer area positioned closer to the one surface and the other surface than the inner area and extending in a depth direction from the one surface and the other surface, and

wherein a size of a first inner diameter in the outer area is greater than a size of a second inner diameter in the inner area.

14. The display device of claim 13 , wherein the display substrate includes third and fourth side ends positioned in the second direction, wherein the second area includes a second display panel installation area and a second bezel area positioned outside the second display panel installation area and closer to first to fourth side ends than the second display panel installation area,

wherein a third opening pattern is provided at the one surface or the other surface of the second display panel installation area,

wherein a fourth opening pattern is provided at the one surface or the other surface of the second bezel area; and

wherein the fourth opening pattern is a second hole passing through the one surface and the other surface of the second bezel area.

15. The display device of claim 13 , wherein the display panel is disposed on the one surface, and

wherein the first opening pattern passes through the other surface and extends in a direction toward the one surface.

16. The display device of claim 13 , wherein the first opening pattern is formed in a depth of 0.5 times or less a thickness of the display substrate.

17. The display device of claim 13 , wherein the display panel is disposed on the one surface,

the first display panel installation area is defined as an area overlapping the display panel, and

the first bezel area is defined as an area that does not overlap the display panel.

18. The display device of claim 13 , wherein the size of the first inner diameter of the first hole extends from the one surface and the other surface toward the inner area and becomes smaller.