Flexible display apparatus and method of manufacturing the same

1. A flexible display apparatus comprising:

a third film that includes a bending portion;

an emission display unit over the third film; and

a first film attached to the third film,

wherein the third film is between the emission display unit and the first film,

wherein the first film includes at least one stress adjusting feature that is positioned at the bending portion of the third film,

wherein the at least one stress adjusting feature includes a gap that extends along at least a part of the bending portion of the third film, and

wherein a width of the gap is at least two times greater than a thickness of the first film.

2. The flexible display apparatus of claim 1 ,

wherein the third film comprises polyimide.

3. The flexible display apparatus of claim 1 ,

wherein the first film includes a first region and a second region which is separated with the first region by the gap.

4. The flexible display apparatus of claim 3 ,

wherein the first region includes a first straight portion and the second region includes a second straight portion, and

wherein the first straight portion and the second straight portion are substantially parallel.

5. The flexible display apparatus of claim 3 ,

wherein the first region and the second region include a first material, and

further comprising a second material different from the first material in the gap.

6. The flexible display apparatus of claim 5 , wherein the second material has elasticity.

7. The flexible display apparatus of claim 1 ,

wherein the first film includes a first portion having a first thickness and a second portion that is attached to the bending portion of the third film,

wherein the second portion has a second thickness which is smaller than the first thickness.

8. The flexible display apparatus of claim 1 , further comprising a fourth film facing the third film,

wherein the emission display unit is between and encapsulated by the third film and the fourth film.

9. The flexible display apparatus of claim 8 ,

wherein the flexible display apparatus comprises a neutral portion in which a tensile stress and a compressive stress are not incurred by a force when the force capable of bending the flexible display apparatus is applied to the flexible display apparatus, and

wherein the emission display unit is positioned at the neutral portion.

10. The flexible display apparatus of claim 8 ,

wherein the emission display unit comprises a pixel electrode on the third film, an organic emission layer on the pixel electrode, and an opposite electrode on the organic emission layer,

wherein the fourth film is on the opposite electrode.

11. The flexible display apparatus of claim 1 , further comprising a barrier between the emission display unit and the third film.

12. A method of manufacturing a flexible display apparatus, the method comprising:

forming a third film including a bending portion on a supporting substrate;

forming an emission display unit on the third film;

separating the supporting substrate from the third film;

forming a first film on a surface of the third film opposite to another surface of the third film on which the emission display unit is formed; and

bending the bending portion of the third film,

wherein the first film includes at least one stress adjusting feature that is positioned at the bending portion of the third film.

13. The method of claim 12 , further comprising:

removing at least some of the first film that has been attached to the third film to form the stress adjusting feature.

14. The flexible display apparatus of claim 1 , further comprising a second film over the emission display unit.

15. The flexible display apparatus of claim 14 , wherein at least a part of the second film overlaps with the gap.

16. A flexible display apparatus comprising:

a third film that includes a bending portion;

an emission display unit over the third film; and

a first film attached to the third film,

wherein the third film is between the emission display unit and the first film,

wherein the first film includes at least one stress adjusting feature that is positioned at the bending portion of the third film,

wherein the at least one stress adjusting feature includes a gap that extends along at least a part of the bending portion of the third film,

wherein the first film includes a first straight portion and a second straight portion being positioned at both outer regions of the bending portion, respectively, and

wherein the first straight portion and the second straight portion are substantially parallel and facing each other.

17. The flexible display apparatus of claim 16 ,

wherein the first straight portion includes a first surface attached to the third film and a second surface opposite the first surface, and the second straight portion includes a third surface attached to the third film and a fourth surface opposite the third surface, and

wherein the second surface and the fourth surface are facing each other.