Display device

1 . A display device, comprising:

a substrate comprising a first substrate, an interlayer insulating layer, and a second substrate, the first substrate having a thickness different than the second substrate;

a display area;

an open area surrounded by the display area;

a transistor disposed over the substrate;

a first planarization layer disposed over a first source-drain electrode pattern of the transistor;

a second source-drain electrode pattern disposed over the first planarization layer;

a second planarization layer disposed over the second source-drain electrode pattern;

a light emitting element disposed on the second planarization layer and comprising an anode, a light emitting layer, and a cathode;

an encapsulation layer disposed on the light emitting element, and comprising at least one inorganic layer and at least one organic layer;

a touch sensor disposed over the encapsulation layer;

a protection layer disposed on the touch sensor, and comprising an organic material; and

a third planarization layer disposed on the protection layer,

wherein the third planarization layer has a thickness different than the protection layer, and

wherein the touch sensor is disposed between the third planarization layer and the encapsulation layer in a cross-sectional view.

2 . The display device of claim 1 , wherein the open area comprises a bezel area positioned between a trimming line of the open area and the display area.

3 . The display device of claim 2 , wherein the third planarization layer extends to the bezel area of the open area.

4 . The display device of claim 2 , further comprising a non-display area surrounding the display area.

5 . The display device of claim 4 , wherein the non-display area comprises a pad area where a pad portion where an integrated circuit is disposed is positioned.

6 . The display device of claim 5 , further comprising at least one dam positioned between the display area and the pad area.

7 . The display device of claim 6 , further comprising at least one touch signal line positioned on the at least one dam.

8 . The display device of claim 7 , further comprising a bank that covers a portion of the anode,

wherein a portion of the bank is included in the at least one dam.

9 . The display device of claim 1 , further comprising at least one electro-optical device,

wherein the at least one electro-optical device at least partially overlaps with the open area.

10 . The display device of claim 1 , wherein the open area passes through the substrate.

11 . A display device, comprising:

a substrate including a plurality of substrate layers, a display area, and a non-display area surrounding the display area;

an opening through the substrate in the display area;

a transistor disposed over the substrate and including a first source-drain electrode pattern;

a first planarization layer disposed on the first source-drain electrode pattern;

a second source-drain electrode pattern disposed on the first planarization layer;

a second planarization layer disposed on the second source-drain electrode pattern;

a light emitting element disposed on the second planarization layer of the multi-layer stack;

a plurality of encapsulation layers disposed on the light emitting element, the plurality of encapsulation layers comprising at least two layers with a different composition from each other;

a touch sensor disposed over the encapsulation layer;

a protection layer disposed on the touch sensor; and

a third planarization layer disposed on the protection layer,

wherein the non-display area comprises a bending area in which at least a portion of the substrate is bent around the display area, and

wherein the third planarization layer extends from the display area into the bending area, and the touch sensor is disposed between the third planarization layer and the encapsulation layer in a cross-sectional view.

12 . The display device of claim 11 , further comprising at least one signal line positioned between the substrate and the second planarization layer in the bending area.

13 . The display device of claim 12 , wherein the at least one signal line overlaps with the second and third planarization layers in the bending area.

14 . The display device of claim 12 , further comprising at least one data line electrically connected with at least one subpixel disposed on the substrate,

wherein the at least one data line is connected to the at least one signal line.

15 . The display device of claim 11 , wherein the third planarization layer has a thickness greater than the protection layer.

16 . The display device of claim 11 , wherein the third planarization layer contacts a portion of the substrate adjacent to the open area.

17 . A display device, comprising:

a substrate including a display area and a bezel area surrounding the display area;

an opening through the substrate in the display area configured to overlap an electro-optical device;

a transistor disposed over the substrate and including a first source-drain electrode pattern;

a first planarization layer disposed on the first source-drain electrode pattern;

a second source-drain electrode pattern disposed on the first planarization layer;

a second planarization layer disposed on the second source-drain electrode pattern;

a light emitting element disposed on the second planarization layer;

an encapsulation layer disposed on the light emitting element;

a touch sensor disposed over the encapsulation layer;

a protection layer disposed on the touch sensor;

a third planarization layer disposed on the protection layer, wherein the third planarization layer is disposed on an end face of the protection layer and extends beyond the end face of the protection layer to the bezel area; and

a light shield layer disposed over the substrate,

wherein the touch sensor is disposed between the third planarization layer and the encapsulation layer in a cross-sectional view.

18 . The display device of claim 17 , wherein the light shield layer overlaps with at least a part of the transistor.

19 . The display device of claim 17 , further comprising a gate material layer disposed over the substrate and disposed in a same layer as a gate electrode of the transistor.

20 . The display device of claim 19 , further comprising:

an interlayer insulating layer disposed on the gate material layer and the gate electrode; and

a metal pattern disposed on the interlayer insulation layer.