A display device includes a substrate, a display region having a pixel switch, a pixel electrode which is connected to the pixel switch, and a transparent common electrode formed over the substrate, a peripheral region having a gate signal line which is connected to the pixel switch, and a common connection line which is connected to the transparent common electrode, an insulating layer which is disposed on the gate signal line and the common connection line, a conductive layer which is disposed on the insulating layer and crosses the gate signal line and crosses the common connection line in the peripheral region, a first semiconductor film which is disposed between the insulating layer and the conductive layer, and a second semiconductor film which is disposed between the insulating layer and the conductive layer and is separated from the first semiconductor film.
1. A display device comprising:
a substrate;
a display region having a pixel switch, a pixel electrode which is connected to the pixel switch, and a transparent common electrode formed over the substrate;
a peripheral region having a gate signal line which is connected to the pixel switch, and a common connection line which is connected to the transparent common electrode;
an insulating layer which is disposed on the gate signal line and the common connection line;
a conductive layer which is disposed on the insulating layer and crosses the gate signal line and crosses the common connection line in the peripheral region;
a first semiconductor film which is disposed between the insulating layer and the conductive layer; and
a second semiconductor film which is disposed between the insulating layer and the conductive layer and is separated from the first semiconductor film;
wherein the conductive layer is connected to the gate signal line via a pair of diodes;
wherein lengths of the gate signal line and the common connection line are different by at least 10 times;
wherein the first semiconductor film overlaps, in plan view, a region where the gate signal line crosses the conductive layer; and
wherein the second semiconductor film overlaps, in plan view, a region where the common connection line crosses the conductive layer.
2. A display device according to claim 1 , wherein the first semiconductor film and the second semiconductor film each include a semiconductor film doped with an impurity.
3. A display device according to claim 2 ,
wherein the gate signal line extends both in the peripheral region and in the display region; and
wherein the common connection line extends in a frame region without being formed in the display region.
4. A display device according to claim 3 ,
wherein the first semiconductor film does not overlap with a wire other than the conductive layer and the gate signal line; and
wherein the second semiconductor film does not overlap with a wire other than the conductive layer and the common connection line.
5. A display device according to claim 3 ,
wherein the conductive layer is a ground wiring.
6. A display device according to claim 2 ,
wherein the conductive layer is a ground wiring.
7. A display device according to claim 1 , wherein the gate signal line extends both in the peripheral region and in the display region; and
wherein the common connection line extends in a frame region without being formed in the display region.
8. A display device according to claim 7 ,
wherein the first semiconductor film does not overlap with a wire other than the conductive layer and the gate signal line; and
wherein the second semiconductor film does not overlap with a wire other than the conductive layer and the common connection line.
9. A display device according to claim 7 ,
wherein the conductive layer is a ground wiring.
10. A display device according to claim 1 ,
wherein the first semiconductor film does not overlap with a wire other than the conductive layer and the gate signal line; and
wherein the second semiconductor film does not overlap with a wire other than the conductive layer and the common connection line.
11. A display device according to claim 10 ,
wherein the conductive layer is a ground wiring.
12. A display device according to claim 1 ,
wherein the conductive layer is a ground wiring.