Display device having an alignment mark

1. A display device comprising:

a substrate including a display area and a non-display area;

an alignment mark positioned in the non-display area;

a protective layer positioned around the alignment mark in the non-display area and separated from the alignment mark in a direction parallel to an upper surface of the substrate; and

a supporting member positioned between the alignment mark and the protective layer.

2. The display device of claim 1 , wherein

the alignment mark includes a plurality of protrusions, and

at least part of the supporting member is positioned in a region defined by a straight line connecting adjacent protrusions and the alignment mark.

3. The display device of claim 1 , wherein

a height of the supporting member is in a range of from about 30% to about 100% of a height of the protection layer.

4. The display device of claim 1 , further comprising:

a transistor positioned on the substrate in the display area;

a protection layer positioned on the transistor;

a pixel electrode positioned on the protection layer; and

a pixel definition layer positioned on the pixel electrode,

wherein the supporting member includes a layer formed of a same layer as the pixel definition layer.

5. The display device of claim 4 , wherein

the protective layer includes a layer formed of a same layer as the pixel definition layer.

6. The display device of claim 4 , wherein

the supporting member includes a first supporting layer positioned on the substrate and a second supporting layer positioned on the first supporting layer, and

the second supporting layer is formed of a same layer as the pixel definition layer.

7. The display device of claim 6 , wherein

the first supporting layer is formed of a same layer as the protection layer.

8. The display device of claim 6 , wherein

the supporting member further includes a third supporting layer positioned on the second supporting layer.

9. The display device of claim 4 , wherein

the protection layer and the pixel definition layer are also positioned in the non-display area, and

the protective layer includes the protection layer and the pixel definition layer.

10. The display device of claim 4 , wherein

the supporting member includes a single layer.

11. The display device of claim 1 , wherein

the supporting member includes a light blocking material.

12. The display device of claim 1 , wherein

a shortest distance between the supporting member and the alignment mark is about 50 micrometers or more.

13. The display device of claim 1 , wherein

the supporting member has a substantially circular shape.

14. The display device of claim 1 , wherein

the supporting member has a substantially polygonal shape.

15. The display device of claim 1 , wherein

the alignment mark has a cross shape, and at least one supporting member is positioned in each of four regions formed by the cross shape.

16. The display device of claim 1 , wherein

the supporting member is in direct contact with the protective layer.

17. The display device of claim 1 , further comprising

a pad portion positioned in the non-display area,

wherein the protective layer does not overlap the pad portion in a thickness direction of the substrate.

18. A display device, comprising:

a substrate;

a buffer layer disposed on the substrate;

an alignment mark disposed on the buffer layer;

supporting members disposed on opposite sides of the alignment mark and spaced apart from the alignment mark; and

protective layers disposed on opposite sides of the alignment mark and spaced apart from the alignment mark by a greater distance than the supporting members are spaced apart from the alignment mark.

19. The display device of claim 18 , wherein each of the supporting members has substantially a same height as each of the protective layers.

20. The display device of claim 19 , wherein each of the supporting members and each of the protective layers comprises at least two layers.