Display apparatus and method of manufacturing the same

1. A display apparatus including a first non-folding area, a second non-folding area spaced apart from the first non-folding area, and a folding area between the first non-folding area and the second non-folding area, the display apparatus comprising:

a flexible display panel having a display area disposed in the first non-folding area, the second non-folding area, and the folding area;

a metal plate supporting the flexible display panel and including a recess in the folding area, the metal plate having a first thickness in the first non-folding area and the second non-folding area, and a second thickness less than the first thickness in the folding area;

a resin portion disposed in the recess; and

a first adhesive layer disposed between the flexible display panel and the metal plate.

2. The display apparatus of claim 1 , wherein the metal plate further includes opening patterns in the folding area, and

wherein the recess overlaps the display area of the flexible display panel in a plan view.

3. The display apparatus of claim 2 , wherein the metal plate includes steel use stainless (SUS).

4. The display apparatus of claim 3 , wherein the first thickness of the metal plate is about 100 μm or less.

5. The display apparatus of claim 2 , wherein:

the resin portion includes a base and protrusions protruding from the base and disposed inside the opening patterns; and the protrusions are disposed between the base and the flexible display panel.

6. The display apparatus of claim 5 , wherein the resin portion includes a carbon component.

7. The display apparatus of claim 6 , wherein the resin portion includes graphite powder.

8. The display apparatus of claim 5 , wherein the resin portion has a modulus lower than a modulus of the metal plate.

9. The display apparatus of claim 5 , wherein an air gap is formed in the opening pattern of the metal plate.

10. The display apparatus of claim 9 , wherein the air gap is defined by an upper surface of the protrusion of the resin portion and a lower surface of the first adhesive layer.

11. The display apparatus of claim 2 , wherein:

the first and second non-folding areas are spaced apart in a first direction; and

each of the opening patterns of the metal plate extends in a second direction perpendicular to the first direction and is disposed in a zigzag form in the first direction.

12. The display apparatus of claim 11 , wherein the opening pattern disposed at an edge of the metal plate in the second direction has one side connected to the edge of the metal plate and is opened, when viewed in a plan view.

13. The display apparatus of claim 1 , wherein the flexible display panel is configured to be positioned inward of the metal plate when the display apparatus is in a folded state due to bending of the folding area.

14. The display apparatus of claim 1 , further comprising:

a cushion layer disposed between the first adhesive layer and the flexible display panel, the cushion layer including a foam-shaped material; and

a second adhesive layer disposed between the cushion layer and the flexible display panel.

15. The display apparatus of claim 1 , wherein the flexible display panel includes:

a flexible substrate;

a thin film transistor disposed on the flexible substrate;

a first electrode electrically connected to the thin film transistor;

a light emitting structure disposed on the first electrode; and

a second electrode disposed on the light emitting structure.

16. The display apparatus of claim 15 , further comprising:

a thin film encapsulation layer disposed on the second electrode;

a third adhesive layer disposed on the thin film encapsulation layer; and

a window layer disposed on the third adhesive layer.

17. A method of manufacturing a display apparatus including a first non-folding area, a second non-folding area spaced apart from the first non-folding area, and a folding area between the first non-folding area and the second non-folding area, the method comprising:

forming a recess on a metal plate in the folding area to have a first thickness in the first non-folding area and the second non-folding area, and a second thickness less than the first thickness in the folding area by the recess;

forming a resin portion in the recess of the metal plate;

attaching a cushion layer onto the side of the metal plate opposite to the resin portion by using a first adhesive layer; and

attaching a display panel structure including a flexible display panel onto the cushion layer,

wherein the flexible display panel has a display area disposed in the first non-folding area, the second non-folding area, and the folding area.

18. The method of claim 17 , wherein forming the metal plate includes:

forming the recess by removing a portion of the metal plate in the folding area through an etching process; and

forming opening patterns on the metal plate in the folding area through an etching process, and

wherein the recess overlaps the display area of the flexible display panel in a plan view.

19. The method of claim 18 , further comprising providing a resin solution in the recess and the opening patterns of the metal plate to form a resin portion including a base and protrusions protruding from the base and disposed inside the opening patterns.

20. The method of claim 19 , wherein forming the resin portion includes:

providing a support portion having projections corresponding to the opening patterns under the metal plate before providing the resin solution; and

forming the resin portion including the base and the protrusions by providing the resin solution, and

removing the support portion from the metal plate, and

wherein, when the cushion layer is attached onto the metal plate by using the first adhesive layer, an air gap defined by an upper surface of the protrusion of the resin portion and a lower surface of the first adhesive layer is formed in the opening pattern.