Display device having connection unit

1. A display device comprising:

a substrate;

a pixel connected to a gate line and a data line on the substrate;

a connection unit connected to one of the gate line and the data line of the substrate; and

a driving integrated circuit mounted on the connection unit,

wherein:

the connection unit comprises an output lead line, an auxiliary lead line and a first pattern unconnected to any conductive portion of the display device, and

the output lead line, auxiliary lead line and first pattern are sequentially disposed along a first direction on an output portion of the connection unit,

an end portion of the first pattern is disposed on a first side of the connection unit,

at least a portion of the auxiliary lead line is disposed on an input portion of the connection unit.

2. The display device as claimed in claim 1 , wherein the first pattern is not connected to the driving integrated circuit, output lead line and auxiliary lead line.

3. The display device as claimed in claim 1 , wherein the first pattern extends in the first direction.

4. The display device as claimed in claim 1 , wherein the first side of the connection unit extends in a second direction intersecting the first direction.

5. The display device as claimed in claim 1 , wherein:

the first side of the connection unit intersects a side of the substrate,

the side of the substrate overlaps the connection unit,

a third side of the connection unit overlaps the substrate and does not intersect the side of the substrate, and

the first pattern is disposed between the side of the substrate and the third side of the connection unit.

6. The display device as claimed in claim 1 , wherein the first pattern extends from the first side of the connection unit toward another side of the connection unit.

7. The display device as claimed in claim 1 , wherein an angle between the first pattern and the first side of the connection unit is about 90 degrees.

8. The display device as claimed in claim 1 , wherein the first pattern comprises a plurality of first dummy lines, and

a less angle of respective angles among the plurality of first patterns and the first side of the connection unit is greater than about 0 degree and less than about 90 degrees.

9. The display device as claimed in claim 1 , wherein the first pattern is between the substrate and a base layer of the connection unit.

10. The display device as claimed in claim 1 , wherein an entire surface of the first pattern facing the substrate is not covered by a cover layer of the connection unit.

11. The display device as claimed in claim 1 , further comprising an anisotropic conductive film between at least a portion of the first pattern and the substrate.

12. The display device as claimed in claim 1 , wherein the first pattern comprises a plurality of first dummy lines, the plurality of first dummy lines being not connected to one another.

13. The display device as claimed in claim 1 , wherein the first pattern comprises a plurality of first dummy lines, the plurality of first dummy lines being substantially parallel to one another.

14. The display device as claimed in claim 1 , wherein the first pattern comprises a plurality of first dummy lines, each of the first dummy lines having a substantially same length.

15. The display device as claimed in claim 1 ,

wherein the first pattern comprises a plurality of first lines, the plurality of first dummy lines having a less length, as more adjacent to a third side of the connection unit, and

the third side of the connection unit overlaps the substrate and does not intersect a side of the substrate.

16. The display device as claimed in claim 1 , wherein the first pattern comprises a plurality of first dummy lines, two adjacent ones of the first lines having a greater distance therebetween, as more adjacent to a third side of the connection unit, and

the third side of the connection unit overlaps the substrate and does not intersect a side of the substrate.

17. The display device as claimed in claim 1 , wherein the first pattern comprises a plurality of first dummy lines, the plurality of first lines having a gradually decreasing width, as further away from the first side of the connection unit.

18. The display device as claimed in claim 1 , wherein the first pattern comprises a plurality of first dummy lines, respective distances among adjacent ones of the first dummy lines being uniform.

19. The display device as claimed in claim 18 , wherein the distance among adjacent ones of the first dummy lines is in a range of about 15 μm to about 30 μm.

20. The display device as claimed in claim 1 , wherein at least a portion of the end portion of the first pattern comprises a carbonized area.

21. The display device as claimed in claim 1 , further comprising a second pattern adjacent to a second side of the connection unit facing the first side, the second pattern not being connected to the driving integrated circuit, output lead line, auxiliary lead line and first pattern.

22. The display device as claimed in claim 21 , wherein the second pattern and the first pattern are symmetric to one another in shape.

23. The display device as claimed in claim 1 , wherein the auxiliary lead line is not connected to the driving integrated circuit.

24. The display device as claimed in claim 1 , wherein the auxiliary lead line connects between the input portion and the output portion.