Display device including cover layer surrounding driving chip

1 . A display device comprising:

a display panel including a first area, a second area that can be bent from the first area, and a third area extending from the second area;

a driving chip disposed in the third area;

a connection substrate including a first hole,

wherein the first hole overlaps the driving chip and the third area; and

a cover layer disposed in the third area,

wherein the cover layer contacts a side of the driving chip.

2 . The display device according to claim 1 , wherein the cover layer is disposed on more than one side of the driving chip.

3 . The display device according to claim 1 , wherein a thickness of the cover layer decreases as a distance of the cover layer from the driving chip increases.

4 . The display device according to claim 1 , wherein a thickness of the cover layer is the same as a thickness of the driving chip.

5 . The display device according to claim 1 , wherein the cover layer includes a thermally conductive polymer and a heat dissipation material.

6 . The display device according to claim 5 , wherein the thermally conductive polymer includes polyethylenedioxythiophene, polysulfonate, polythiophene, polyaniline, polypyrrole, or polyacetylene.

7 . The display device according to claim 5 , wherein the heat dissipation material includes aluminum, copper, silver, graphene, or graphite.

8 . The display device according to claim 1 , wherein adhesion of the cover layer to the driving chip is 3.5 N/cm or more.

9 . The display device according to claim 1 , wherein a modulus of the cover layer is 250 MPa or more.

10 . The display device according to claim 1 , wherein moisture permeability of the cover layer is 5 to 30 g/m 3 .

11 . The display device according to claim 1 , wherein the first hole overlaps the cover layer.

12 . The display device according to claim 1 , further comprising:

a first protective film disposed on a rear surface of the first area; and

a second protective film disposed on a rear surface of the third area.

13 . The display device according to claim 1 , further comprising:

a first connection pad disposed in the third area,

wherein the first connection pad is connected to a line extending from a display area of the display panel.

14 . The display device according to claim 13 , wherein the connection substrate further includes a second connection pad connected to the first connection pad.

15 . The display device according to claim 1 , wherein the connection substrate further includes a plurality of test points disposed in a test area.

16 . The display device according to claim 15 , wherein the connection substrate further includes a plurality of second holes overlapping the third area and spaced apart from each other.

17 . The display device according to claim 16 , wherein the second holes do not overlap the test area.

18 . The display device according to claim 16 , wherein the second holes are filled with resin.

19 . The display device according to claim 18 , wherein the resin contacts the third area.

20 . The display device according to claim 18 , wherein the resin includes acrylic resin, urethane resin, olefin resin, imide resin, amide resin, ester resin, isocyanate resin, epoxy resin, or silicone resin.

21 . A display device comprising:

a display panel including a first area, a second area bendable from the first area, and a third area extending from the second area, wherein when the second area is bent, the first area overlaps the third area;

a driving chip disposed in the third area;

a cover layer disposed on opposite sides of the driving chip; and

a connection substrate that includes an opening that exposes the driving chip and the cover layer.