Flexible display device

1. A display device including a flat area and a flexible area, the display device comprising:

a circuit structure;

a display structure on the circuit structure; and

an organic layer under or over the circuit structure, the organic layer comprising at least one groove overlapping the flexible area.

2. The display device of claim 1 , further comprising a planarization layer between the circuit structure and the display structure,

wherein the display structure comprises:

a first electrode on the planarization layer;

a pixel defining layer at a periphery of the first electrode on the planarization layer;

an emission layer on the first electrode; and

a second electrode on the emission layer, and

wherein the organic layer comprises the planarization layer or the pixel defining layer.

3. The display device of claim 2 , further comprising an encapsulation structure on the display structure,

wherein a portion of the encapsulation structure is inside a groove of the at least one groove.

4. The display device of claim 3 , wherein the encapsulation structure comprises:

a first inorganic encapsulation layer on the display structure;

an organic encapsulation layer on the first inorganic encapsulation layer; and

a second inorganic encapsulation layer on the organic encapsulation layer, and

wherein a height of a first portion of the second inorganic encapsulation layer inside the groove is lower than a height of a second portion of the second inorganic encapsulation layer outside the groove.

5. The display device of claim 2 , wherein a groove of the at least one groove is exposed.

6. The display device of claim 1 , further comprising a base structure under the circuit structure,

wherein the base structure comprises:

a first base layer;

a first barrier layer on the first base layer;

a second base layer on the first barrier layer; and

a second barrier layer between the second base layer and the circuit structure, and

wherein the organic layer comprises the second base layer.

7. The display device of claim 6 , further comprising an organic material in a groove of the at least one groove.

8. The display device of claim 1 , wherein the flat area comprises a first display area and a second display area located at a side of the first display area, and

wherein the flexible area is adjacent to a boundary between the first display area and the second display area.

9. The display device of claim 1 , wherein the flat area comprises a display area and a non-display area located at a side of the display area, and

wherein the flexible area is adjacent to a boundary between the display area and the non-display area.

10. A display device including a flat area and a flexible area, the display device comprising:

a base structure;

a circuit structure on the base structure;

a planarization layer on the circuit structure;

a first electrode on the planarization layer;

a pixel defining layer at a periphery of the first electrode on the planarization layer;

an emission layer on the first electrode; and

a second electrode on the emission layer,

wherein at least the pixel defining layer comprises at least one groove overlapping the flexible area.

11. The display device of claim 10 , wherein the at least one groove is defined in the planarization layer and the pixel defining layer.

12. The display device of claim 10 , further comprising an encapsulation structure on the second electrode,

wherein a portion of the encapsulation structure is inside a groove of the at least one groove.

13. The display device of claim 12 , wherein the encapsulation structure includes:

a first inorganic encapsulation layer on the second electrode;

an organic encapsulation layer on the first inorganic encapsulation layer; and

a second inorganic encapsulation layer on the organic encapsulation layer, and

wherein a height of a first portion of the second inorganic encapsulation layer inside the groove is lower than a height of a second portion of the second inorganic encapsulation layer outside the groove.

14. The display device of claim 10 , wherein a groove of the at least one groove is exposed.

15. A display device including a flat area and a flexible area, the display device comprising:

a base structure comprising at least one base layer;

a circuit structure on the base structure;

a planarization layer on the circuit structure; and

a display structure on the planarization layer;

wherein the at least one base layer of the base structure comprises at least one groove overlapping the flexible area.

16. The display device of claim 15 , wherein the base structure comprises:

a first base layer of the at least one base layer;

a first barrier layer on the first base layer;

a second base layer of the at least one base layer, the second base layer being on the first barrier layer; and

a second barrier layer between the second base layer and the circuit structure, and

wherein the at least one groove is defined in the second base layer and the second barrier layer.

17. The display device of claim 16 , wherein a groove of the at least one groove is filled with an organic material.

18. The display device of claim 15 , wherein the base structure comprises:

a first base layer of the at least one base layer;

a first barrier layer on the first base layer;

a second base layer of the at least one base layer, the second base layer being on the first barrier layer; and

a second barrier layer between the second base layer and the circuit structure, and

wherein the at least one groove is defined in the first base layer, the first barrier layer, the second base layer, and the second barrier layer.

19. The display device of claim 18 , wherein the circuit structure comprises:

a first inorganic insulation layer on the base structure; and

a second inorganic insulation layer on the first inorganic insulation layer,

wherein the first inorganic insulation layer and the second inorganic insulation layer cover the at least one groove, and

wherein an organic material fills a groove of the at least one groove on the second inorganic insulation layer.