Display device

1. A display device, comprising:

a display panel including a display area at which an image is displayed, the display area comprising:

a first display area at which the display panel is stretchable, disposed at an outer edge of the display device, the first display area including a display unit with which the image is generated, and

a second display area having flexibility less than that of the first display area, the second display area disposed more inward from the outer edge of the display device than the first display area;

a cover window disposed on the display panel, including a peripheral portion and a central portion which is more inward from the outer edge of the display device than the peripheral portion; and

a vibration unit which transfers sound through vibration, the vibration unit overlapping the second display area along a thickness direction of the display device.

2. The display device of claim 1 , wherein the peripheral portion of the cover window overlaps the first display area of the display panel, along the thickness direction of the display device.

3. The display device of claim 1 , wherein the first display area of the display panel includes:

an island provided in plurality spaced apart from each other, and

a bridge provided in plurality respectively connecting the plurality of islands to each other, the bridge being stretchable.

4. The display device of claim 3 , wherein within the first display area of the display panel:

the display unit includes an organic light emitting diode, and

the display unit which includes the organic light emitting diode is disposed on the island of the first display area.

5. The display device of claim 4 , the first display area of the display panel further includes a first wiring and a second wiring disposed in different layers of the display panel and each electrically connected to the display unit.

6. The display device of claim 5 , wherein

the bridge which is stretchable has a serpentine shape extended between islands connected to each other by the bridge, and

each of the first wiring and the second wiring:

is connected to both display units respectively disposed on the islands connected to each other by the bridge which is stretchable, and

has a serpentine shape corresponding to that of the bridge to be stretchable together with the bridge.

7. The display device of claim 1 , further comprising a bracket in which the vibration unit and the display panel are accommodated,

wherein the bracket is attached to the peripheral portion of the cover window and disposes the display panel and the vibration unit between the bracket and the cover window.

8. The display device of claim 7 , further comprising a cover panel which radiates heat from or absorbs an impact to the display panel, disposed between the display panel and the bracket.

9. The display device of claim 8 , further comprising an adhesive layer disposed between the bracket and the cover panel, which attaches the bracket and the cover panel to each other.

10. The display device of claim 1 , wherein the vibration unit includes a piezo material.

11. The display device of claim 1 , wherein the peripheral portion of the cover window disposed on the display panel, extends further than the second display area of the display panel, the extended peripheral portion being bent with at least one curvature in the thickness direction of the display device.

12. The display device of claim 11 , wherein the first display area of the display panel on which the cover window is disposed, extends further than the central portion of the cover window to be bent corresponding to the curvature of the peripheral portion of the cover window.

13. The display device of claim 1 , wherein the central portion of the cover window disposed on the display panel has flexibility less than that of the peripheral portion of the cover window.

14. The display device of claim 13 , wherein within the cover window:

a material of the central portion having flexibility less than that of the peripheral portion includes glass, and

a material of the peripheral portion includes at least one selected from plastic, silicone and a polymer material having elasticity.