Display device

1 . A display device including a display area and a pad area, the display device comprising:

a pixel on a base layer in the display area, the pixel including a light-emitting element; and

pads on the base layer in the pad area, the pads including:

pad lines including a first pad line and a second pad line;

a first electrode part; and

a second electrode part,

wherein the pads include a first contact area and a second contact area,

wherein the first pad line and the second pad line are electrically connected to each other in the first contact area,

wherein the second pad line and the second electrode part are electrically connected in the second contact area,

wherein the first electrode part overlaps the second pad line in a plan view, and

wherein the first electrode part and the second electrode part are electrically separated from each other by a pad insulating pattern.

2 . The display device of claim 1 , wherein the first electrode part covers an insulating layer, the insulating layer being on the second pad line in the first contact area.

3 . The display device of claim 2 , wherein in the first contact area, the first pad line, the second pad line, the insulating layer, and the first electrode part overlap each other in plan view, and

wherein in the second contact area, the second pad line, and the second electrode part overlap each other in plan view.

4 . The display device of claim 1 , wherein the first pad line and the second pad line are respectively in different layers.

5 . The display device of claim 1 , further comprising a buffer layer on the base layer, and defining an opening exposing the first pad line in the first contact area,

wherein the second pad line is electrically connected to the first pad line through the opening in the first contact area.

6 . The display device of claim 1 , further comprising an insulating layer on the second pad line, and defining an opening exposing the second pad line in the second contact area,

wherein the second electrode part is electrically connected to the second pad line through the opening in the second contact area.

7 . The display device of claim 1 , wherein the first electrode part entirely covers the first contact area in plan view.

8 . The display device of claim 1 , wherein the pads are arranged in a matrix form with respect to a row direction and a column direction,

wherein the row direction corresponds to a first direction,

wherein the column direction corresponds to a second direction, and

wherein one of the pad lines extends in the second direction, and electrically connects a subset of the pads, which are adjacent to each other in the second direction.

9 . The display device of claim 8 , wherein the pads are electrically connected to the pixel,

wherein the display device further comprises a driving circuit member including a chip on film and a flexible circuit member,

wherein an end of the chip on film is electrically connected to the pad area,

wherein another end of the chip on film is electrically connected to the flexible circuit member, and

wherein at least a portion of the chip on film is electrically connected to the second electrode part.

10 . The display device of claim 9 , wherein the chip on film includes a first chip on film and a second chip on film,

wherein the pads include first row pads on a first row and second row pads on a second row,

wherein the first chip on film is electrically connected to the first row pads, and

wherein the second chip on film is electrically connected to the second row pads.

11 . The display device of claim 10 , wherein the first row pads and the second row pads are separated from each other at a separation distance that is about 500 μm or less.

12 . The display device of claim 10 , wherein the first contact area of the first row pads and the first contact area of the second row pads are adjacent to each other with an area interposed therebetween, and

wherein the area is disposed between the first row pads and the second row pads.

13 . The display device of claim 1 , wherein the first electrode part and the second electrode part do not overlap each other in plan view.

14 . The display device of claim 1 , wherein the first electrode part and the second electrode part overlap each other in a plan view.

15 . The display device of claim 1 , wherein the first electrode part and the second electrode part are patterned in different respective processes.

16 . The display device of claim 1 , comprising:

a pixel circuit layer on the base layer, the pixel circuit layer including a lower auxiliary electrode and a transistor; and

a display element layer on the pixel circuit layer, the display element layer including:

the light-emitting element;

a first contact electrode electrically connected to an end of the light-emitting element;

a second contact electrode electrically connected to another end of the light-emitting element; and

an insulating layer between the first contact electrode and the second contact electrode,

wherein the transistor includes an active layer, a gate electrode, a first transistor electrode electrically connected to a first contact region of the active layer, and a second transistor electrode electrically connected to a second contact region of the active layer, and

wherein the first pad line includes a same material as the lower auxiliary electrode,

wherein the second pad line includes a same material as the first transistor electrode and the second transistor electrode, and

wherein the pad insulating pattern includes a same material as the insulating layer.

17 . The display device of claim 1 , wherein the light-emitting element is an organic light-emitting diode or a subminiature light-emitting element including an inorganic material.

18 . The display device of claim 1 , further comprising a color conversion layer on the light-emitting element, the color conversion layer including a quantum dot that changes a wavelength of light.

19 . The display device of claim 1 , wherein the pad area is adjacent to a side of the display area and does not overlap the display area.