Display device

1. A display device comprising:

a substrate including a first display area and a second display area;

an optical element which overlaps the second display area;

a semiconductor layer disposed on the substrate;

a first insulation layer disposed to cover the semiconductor layer;

a gate conductor disposed on the first insulation layer;

a second insulation layer disposed to cover the gate conductor;

a data conductor disposed on the second insulation layer;

a third insulation layer disposed to cover the data conductor; and

a pixel electrode disposed on the data conductor,

wherein the data conductor disposed in the first display area is an opaque conductor, and

a part of the data conductor disposed in the second display area is a transparent conductor.

2. The display device of claim 1 , wherein

the data conductor in the second display area comprises a source connection portion, a drain connection portion and a wiring portion, which are connected to the semiconductor layer, and

the wiring portion is the transparent conductor.

3. The display device of claim 2 , wherein

the transparent conductor has a triple layer structure including an upper layer, an intermediate layer, and a lower layer,

the upper layer and the lower layer of the transparent conductor comprise at least one selected from indium tin oxide, indium zinc oxide, indium gallium zinc oxide, aluminum zinc oxide, gallium zinc oxide and indium tin zinc oxide, and

the intermediate layer of the transparent conductor comprises at least one selected from silver (Ag), copper (Cu), and aluminum (Al).

4. The display device of claim 3 , wherein a thickness of the intermediate layer of the transparent conductor is about 300 Å or less.

5. The display device of claim 2 , wherein each of the source connection portion and the drain connection portion has a triple layer structure in which an upper layer and a lower layer include titanium (Ti), and an intermediate layer includes aluminum (Al).

6. The display device of claim 3 , wherein the pixel electrode has the triple layer structure including the upper layer, an intermediate layer, and the lower layer.

7. The display device of claim 3 , wherein the gate conductor has the triple layer structure including the upper layer, the intermediate layer, and the lower layer.

8. The display device of claim 1 , wherein the data conductor in the first display area has a triple layer structure in which an upper layer and a lower layer include titanium (Ti), and an intermediate layer includes aluminum (Al).

9. The display device of claim 1 , wherein the second display area comprises a transmittance region.

10. A display device comprising:

a substrate including a first display area and a second display area;

an optical element which overlaps the second display area;

a scan line disposed on the substrate, and extending in a first direction;

a data line and a driving voltage line which extend in a second direction perpendicular to the first direction;

a driving transistor including a first electrode electrically connected to the driving voltage line, and a first gate electrode;

a second transistor including a first electrode connected to the data line; and

a pixel electrode electrically connected with the driving transistor,

wherein the data line and the driving voltage line disposed in the first display area comprise an opaque conductor, and

at least one selected from the data line and the driving voltage line disposed in the second display area comprises a transparent conductor.

11. The display device of claim 10 , wherein

the data line in the second display area comprises a wiring portion extending in the second direction, and a second transistor connection portion connected to the first electrode of the second transistor.

12. The display device of claim 11 , wherein

the wiring portion of the data line comprises the transparent conductor, and

the second transistor connection portion of the data line comprises the opaque conductor.

13. The display device of claim 10 , further comprising:

a third transistor including a first electrode connected to the driving voltage line.

14. The display device of claim 13 , wherein the driving voltage line comprises a horizontal wiring portion extending in the first direction, a vertical wiring portion extending in the second direction, an electrode island connection portion, a sustain electrode connection portion, and a third transistor connection portion.

15. The display device of claim 14 , wherein

each of the horizontal wiring portion and the vertical wiring portion of the driving voltage line comprises the transparent conductor, and

the electrode island connection portion, the sustain electrode connection portion, and the third transistor connection portion comprise the opaque conductor.

16. The display device of claim 15 , wherein the horizontal wiring portion is electrically connected to the sustain electrode connection portion by directly contacting the horizontal wiring portion.

17. The display device of claim 16 , wherein the sustain electrode forms a storage capacitor with the first gate electrode, and an insulation layer interposed therebetween.

18. The display device of claim 15 , wherein

the vertical wiring portion comprises a first vertical wiring portion and a second vertical wiring portion,

the first vertical wiring portion is electrically connected to the electrode island connection portion by directly contacting the electrode island connection portion, and

the second vertical wiring portion is electrically connected to the third transistor connection portion by directly contacting the third transistor connection portion.

19. The display device of claim 18 , wherein the electrode island connection portion is electrically connected to an electrode island through an opening in an insulation layer.

20. The display device of claim 18 , wherein the third transistor connection portion is electrically connected to a first electrode of the third transistor through an opening in an insulation layer.