Display device including a foldable display panel and a window of which a portion overlaps a folding area of the foldable display panel and electronic device including the same

1 . A display device comprising:

a display panel configured to display an image, the display panel including:

a first non-folding area;

a second non-folding area; and

a folding area disposed between the first non-folding area and the second non-folding area; and

a window disposed on the display panel and comprising a folding portion overlapping the folding area of the display panel, a first non-folding portion overlapping the first non-folding area of the display panel, and a second non-folding portion overlapping the second non-folding area of the display panel,

wherein the folding portion of the window comprises:

a first substantially curved surface, a substantially flat surface extending from the first substantially curved surface; and

a second substantially curved surface extending from the substantially flat surface,

wherein the substantially flat surface, an upper surface of the first non-folding portion, and an upper surface of the second non-folding portion are parallel to a first direction and a second direction intersecting the first direction,

wherein the first substantially curved surface, the substantially flat surface, and the second substantially curved surface are in sequence in the second direction,

wherein each of a first width of the first substantially curved surface, parallel to the second direction, and a second width of the second substantially curved surface, parallel to the second direction, is greater than a third width of the substantially flat surface, parallel to the second direction, and

wherein the third width of the substantially flat surface is equal to or greater than 8 millimeters and is not greater than half of the first width.

2 . The display device of claim 1 , wherein

each of the folding area of the display panel and the folding portion of the window is folded and unfolded with respect to a folding axis extending in the first direction.

3 . The display device of claim 2 , wherein

each of the first width of the first substantially curved surface and the second width of the second substantially curved surface is about 26 mm.

4 . The display device of claim 1 , wherein

each of a thickness of the first non-folding portion and a thickness of the second non-folding portion is greater than a minimum thickness of the folding portion of the window.

5 . The display device of claim 1 , wherein

the window includes a top surface and a bottom surface facing the top surface,

the bottom surface of the window is disposed between the top surface of the window and the display panel, and

the top surface comprises the first substantially curved surface, the substantially flat surface, and the second substantially curved surface.

6 . The display device of claim 1 , further comprising:

a protection film disposed on the window; and

a first adhesive layer disposed between the protection film and the window,

wherein the first adhesive layer is disposed on the first substantially curved surface, the substantially flat surface, and the second substantially curved surface.

7 . The display device of claim 1 , wherein the window is a glass substrate.

8 . The display device of claim 6 , wherein a width of the window in the second direction is less than a width of the first adhesive layer.

9 . The display device of claim 8 , further comprising:

a second adhesive layer between the window and the display panel,

wherein a width of the second adhesive layer in the second direction is less than the width of the window.

10 . An electronic device comprising:

a display device; and

a main controller configured to control the display device,

wherein the display device comprises:

a display panel configured to display an image, the display panel including:

a first non-folding area;

a second non-folding area; and

a folding area disposed between the first non-folding area and the second non-folding area; and

a window disposed on the display panel and comprising a folding portion overlapping the folding area of the display panel, a first non-folding portion overlapping the first non-folding area of the display panel, and a second non-folding portion overlapping the second non-folding area of the display panel,

wherein the folding portion of the window comprises:

a first substantially curved surface, a substantially flat surface extending from the first substantially curved surface; and

a second substantially curved surface extending from the substantially flat surface,

wherein the substantially flat surface, an upper surface of the first non-folding portion, and an upper surface of the second non-folding portion are parallel to a first direction and a second direction intersecting the first direction,

wherein the first substantially curved surface, the substantially flat surface, and the second substantially curved surface are in sequence in the second direction,

wherein each of a first width of the first substantially curved surface, parallel to the second direction, and a second width of the second substantially curved surface, parallel to the second direction, is greater than a third width of the substantially flat surface, parallel to the second direction, and

wherein the third width of the substantially flat surface is equal to or greater than 8 millimeters and is not greater than half of the first width.