Display device

1. A display device comprising:

a display module in which a folding region that is folded with respect to a folding axis and first and second non-folding regions facing each other with the folding region therebetween are defined; and

a heat dissipation sheet disposed on one surface of the display module,

wherein the heat dissipation sheet comprises:

a first heat dissipation adhesive layer comprising a first adhesive portion overlapping the first non-folding region and a second adhesive portion overlapping the second non-folding region;

a second heat dissipation adhesive layer comprising a third adhesive portion overlapping the first adhesive portion and a fourth adhesive portion overlapping the second adhesive portion;

a heat dissipation layer comprising a first heat dissipation portion disposed between the first adhesive portion and the third adhesive portion and a second heat dissipation portion disposed between the second adhesive portion and the fourth adhesive portion; and

an auxiliary adhesive layer comprising a first auxiliary adhesive portion disposed between the first adhesive portion and the third adhesive portion to surround the first heat dissipation portion on a plane and a second auxiliary adhesive portion disposed between the second adhesive portion and the fourth adhesive portion to surround the second heat dissipation portion on the plane.

2. The display device of claim 1 , wherein the first heat dissipation portion is sealed by the first adhesive portion, the third adhesive portion, and the first auxiliary adhesive portion, and

the second heat dissipation portion is sealed by the second adhesive portion, the fourth adhesive portion, and the second auxiliary adhesive portion.

3. The display device of claim 1 , wherein the first heat dissipation portion and the first auxiliary adhesive portion are spaced apart from each other, and

the second heat dissipation portion and the second auxiliary adhesive portion are spaced apart from each other.

4. The display device of claim 1 , wherein each of the first auxiliary adhesive portion and the second auxiliary adhesive portion comprises:

a base layer;

a first adhesive layer disposed between the base layer and the first heat dissipation adhesive layer; and

a second adhesive layer disposed between the base layer and the second heat dissipation adhesive layer.

5. The display device of claim 4 , wherein each of the first heat dissipation adhesive layer and the second heat dissipation adhesive layer comprises a single adhesive layer.

6. The display device of claim 1 , wherein at least one sensor opening passing through the first adhesive portion, the third adhesive portion, and the first auxiliary adhesive portion is defined.

7. The display device of claim 6 , further comprising at least one cover member disposed between the heat dissipation sheet and the display module,

wherein the sensor opening passes through the at least one cover member.

8. The display device of claim 1 , wherein the first heat dissipation portion comprises a plurality of first openings, which are spaced apart from each other, and the first adhesive portion and the third adhesive portion adhere to each other through the first openings, and

the second heat dissipation portion comprises a plurality of second openings, which are spaced apart from each other, and the second adhesive portion and the fourth adhesive portion adhere to each other through the second openings.

9. The display device of claim 8 , wherein each of the first adhesive portion and the third adhesive portion, which overlap the first openings, has a recessed shape, and

each of the second adhesive portion and the fourth adhesive portion, which overlap the second openings, has a recessed shape.

10. The display device of claim 8 , wherein the heat dissipation layer has a thickness greater than the sum of thicknesses of the first heat dissipation adhesive layer and the second heat dissipation adhesive layer in a thickness direction of the display module.

11. The display device of claim 1 , wherein the first adhesive portion and the second adhesive portion are spaced apart from each other with the folding axis therebetween.

12. The display device of claim 11 , wherein the heat dissipation sheet does not overlap the folding region.

13. The display device of claim 11 , wherein at least a portion of each of the first auxiliary adhesive portion and the second auxiliary adhesive portion overlaps the folding region.

14. The display device of claim 13 , wherein at least a portion of each of the first heat dissipation portion and the second heat dissipation portion overlaps the folding region.

15. The display device of claim 11 , wherein each of the first heat dissipation portion and the second heat dissipation portion does not overlap the folding region.

16. The display device of claim 11 , further comprising:

a plate disposed between the display module and the first heat dissipation adhesive layer; and

an insulating film disposed below the second heat dissipation adhesive layer.

17. The display device of claim 16 , wherein the plate comprises a first plate overlapping the first adhesive portion and a second plate spaced apart from the first plate and overlapping the second adhesive portion, and

the insulating film comprises a first insulation film overlapping the first plate and a second insulating film spaced apart from the first insulation film and overlapping the second plate.

18. The display device of claim 1 , wherein the first heat dissipation portion at least partially contacts the first auxiliary adhesive portion.

19. The display device of claim 1 , wherein the heat dissipation layer comprises a polyimide material.

20. The display device of claim 1 , wherein each of the first heat dissipation adhesive layer and the second heat dissipation adhesive layer comprises a pressure sensitive adhesive, and

the auxiliary adhesive layer comprises a double-sided adhesive tape.