Display device and manufacturing method thereof

1 . A display device comprising:

a display module including a first region, a second region, and a third region arranged in a first direction;

a first support layer including hole groups, each of which includes a plurality of holes and which are spaced apart from each other in the first direction, and disposed under the display module to overlap the first region;

a first adhesive layer disposed between the first region and the first support layer;

a second support layer disposed under the display module to overlap the second region;

a second adhesive layer disposed between the second region and the second support layer; and

multi-bars, which are disposed under the first support layer and spaced apart from each other in the first direction and each of which extends in a second direction crossing the first direction,

wherein the first adhesive layer includes at least one first resin layer, and second resin layers,

wherein each of the second resin layers overlap a corresponding hole group among the hole groups and has a higher modulus than the first resin layer.

2 . The display device of claim 1 , wherein the first adhesive layer comprises an optically clear resin (OCR), and the second adhesive layer comprises a pressure sensitive adhesive (PSA).

3 . The display device of claim 1 , wherein each of the multi-bars is disposed between two of the hole groups of the first support layer, which are adjacent to each other in the first direction.

4 . The display device of claim 3 , wherein:

the at least one first resin layer is in contact with a rear surface of the display module, which overlaps the first region; and

each of the second resin layers extends in the second direction, and the second resin layers are spaced apart from each other in the first direction.

5 . The display device of claim 4 , wherein:

the second resin layers are disposed on a rear surface of the at least one first resin layer; and

a predetermined space is present between the at least one first resin layer and the first support layer and between the second resin layers adjacent to each other.

6 . The display device of claim 5 , wherein the at least one first resin layer is spaced apart from the first support layer with the second resin layers therebetween.

7 . The display device of claim 4 , wherein:

the second resin layers are disposed in the at least one first resin layer; and

a rear surface of the at least one first resin layer and a rear surface of each of the second resin layers, which is exposed on the rear surface of the at least one first resin layer, are in contact with the first support layer.

8 . The display device of claim 3 , wherein:

the at least one first resin layer is provided in plurality, each of the first resin layers extends in the second direction, and the first resin layers are spaced apart from each other in the first direction and overlap corresponding multi-bars, respectively, among the multi-bars; and

each of the second resin layers is disposed between the first resin layers adjacent to each other.

9 . The display device of claim 8 , wherein:

each of the first resin layers and the second resin layers has a first surface in contact with a rear surface of the display module, a second surface in contact with the first support layer, and side surfaces, each of which connects the first surface and the second surface to each other; and

each of the first resin layers and the second resin layers has a trapezoidal shape in a cross-sectional view.

10 . The display device of claim 9 , wherein:

the first surface of each of the first resin layers has a width smaller than a width of the second surface of each of the first resin layers in a cross-sectional view; and

the first surface of each of the second resin layers has a width greater than a width of the second surface of each of the second resin layers in a cross-sectional view.

11 . The display device of claim 9 , wherein:

the first surface of each of the first resin layers has a width greater than a width of the second surface of each of the first resin layers in a cross-sectional view; and

the first surface of each of the second resin layers has a width smaller than a width of the second surface of each of the second resin layers in a cross-sectional view.

12 . The display device of claim 1 , wherein:

the first region of the display module, the first adhesive layer, and the first support layer are folded with respect to a rotary axis extending in the second direction; and

the multi-bars guide a folding operation of the first support layer.

13 . The display device of claim 1 , wherein, under −20° C. conditions, the first resin layer has a modulus of about 300 kPa or less, and the second resin layers has a modulus of about 500 kPa or less.

14 . The display device of claim 1 , wherein each of the first support layer and the second support layer comprises stainless steel.

15 . The display device of claim 1 , wherein each of the hole groups comprises first holes, each of which extends in the second direction and which are spaced apart from each other in the second direction, and second holes which are spaced apart from the first holes in the first direction and spaced apart from each other in the second direction and each of which extends in the second direction,

wherein the first holes and the second holes are arranged alternately with each other in the first direction, and

the second holes are shifted from the first holes in the second direction.

16 . The display device of claim 1 , wherein:

the third region is configured to be bent with respect to a virtual axis extending in the second direction; and

the display device further comprises a circuit board disposed in the third region.