Display device
A display device includes: a display panel; and a back plate on a rear side of the display panel, and including a first folding area configured to be folded in a first direction and a second folding area crossing the first folding area and configured to be folded in a second direction.
1. A display device comprising:
a display panel; and
a back plate on a rear side of the display panel, and including a first folding area configured to be folded in a first direction and a second folding area crossing the first folding area and configured to be folded in a second direction,
wherein the first folding area includes a plurality of first holes of which a length in the first direction is less than a length in the second direction in a plan view.
2. The display device of claim 1 , wherein the first holes have a first length in the first direction and have a second length in the second direction, and the first length is less than the second length.
3. The display device of claim 2 , wherein the second folding area includes a plurality of second holes of which a length in the first direction is greater than a length in the second direction in a plan view.
4. The display device of claim 3 , wherein the second holes have a third length in the first direction and have a fourth length in the second direction, and the third length is greater than the fourth length.
5. The display device of claim 1 , wherein the display panel includes a flexible substrate, and
a modulus of the back plate is greater than that of the flexible substrate.
6. The display device of claim 2 , wherein the first holes have at least one shape of a rectangle of which a long side is parallel with the second direction, a rhombus of which a long side is parallel with the second direction, an oval of which a long axis is parallel with the second direction, and a square.
7. The display device of claim 4 , wherein the second holes have at least one shape of a rectangle of which a long side is parallel with the first direction, a rhombus of which a long side is parallel with the first direction, an oval of which a long axis is parallel with the first direction, and a square.
8. The display device of claim 4 , wherein the back plate further includes a third folding area, and
the third folding area includes a region in which the first folding area overlaps the second folding area.
9. The display device of claim 8 , wherein a length of the third folding area in the first direction is greater than the first length, and a length thereof in the second direction is greater than the fourth length in a plan view.
10. The display device of claim 8 , wherein
the third folding area includes a plurality of third holes of which a length in the first direction is greater than the length in the second direction in a plan view, and
the third holes have a first length in the first direction, and have a fourth length in the second direction.
11. The display device of claim 8 , wherein
the third folding area includes a plurality of third holes of which a length in a first direction is less than a length in a second direction in a plan view, and
the third holes have a first length in the first direction, and have a fourth length in the second direction.
12. The display device of claim 8 , wherein
the third folding area includes a plurality of third holes of which a length in a first direction is equal to a length in a second direction in a plan view, and
the third holes have a first length in the first direction, and have a fourth length in the second direction.
13. The display device of claim 8 , wherein
the third folding area is made of at least one of polyurethane (PU), thermoplastic polyurethane (TPU), polyacrylate, rubber, or silicon.
14. The display device of claim 13 , wherein
the third folding area is manufactured by at least one method of injection molding, extrusion molding, vacuum molding, and casting molding.
15. The display device of claim 10 , wherein the back plate further includes a step compensating member for filling the third holes.
16. The display device of claim 15 , wherein the step compensating member is made of at least one of polyurethane (PU), thermoplastic polyurethane (TPU), polyacrylate, or rubber.
17. The display device of claim 10 , wherein the third holes penetrate the back plate in a thickness direction of the back plate.
18. The display device of claim 10 , wherein
the third holes are positioned on at least one of an upper side or a lower side of the back plate, and
a depth of the third holes is less than a depth of the back plate.
19. A back plate comprising:
a first folding area folded in a first direction;
a second folding area crossing the first folding area and folded in a second direction; and
a third folding area in which the first folding area overlaps the second folding area,
wherein the first folding area includes a plurality of first holes of which a length in the first direction is less than a length in the second direction in a plan view, the first holes have a first length in the first direction and have a second length in the second direction, and the first length is less than the second length,
the second folding area includes a plurality of second holes of which a length in the first direction is greater than a length in the second direction in a plan view, and the second holes have a third length in the first direction and have a fourth length in the second direction, and the third length is greater than the fourth length, and
the third folding area includes a plurality of third holes of which a length in a first direction is equal to a length in a second direction in a plan view, and the third holes have a first length in the first direction, and have a fourth length in the second direction.