Touch panel
A touch panel including a substrate, a touch sensing array, connecting lines, extending portions, a first electrostatic discharge protection circuit, and a second electrostatic discharge protection circuit is provided. The substrate has an active region and a periphery region. The touch sensing array is disposed in the active region. The connecting lines and extending portions are disposed in the periphery region. An end of each of the connecting lines is respectively connected to the touch sensing array by the corresponding extending portion. The first electrostatic discharge protection circuit is disposed in the periphery region and located between the outermost connecting line and the edge of the corresponding substrate. The second electrostatic discharge protection circuit is disposed in the periphery region and located between the innermost connecting line and the touch sensing array. The second electrostatic discharge protection circuit overlaps with the extending portions on the substrate.
1. A touch panel, comprising:
a substrate, having an active region and a periphery region;
a touch sensing array, disposed within the active region;
a plurality of connecting lines, disposed within the periphery region;
a plurality of extending portions, disposed within the periphery region, and an end of each of the connecting lines being connected to the touch sensing array via the corresponding extending portion;
a first electrostatic discharge protection circuit, disposed within the periphery region and located between the outermost connecting line and an edge of the corresponding substrate; and
a second electrostatic discharge protection circuit, disposed within the periphery region and located between the innermost connecting line and the touch sensing array, wherein the second electrostatic discharge protection circuit overlaps with the extending portions on the substrate.
2. The touch panel according to claim 1 , wherein the second electrostatic discharge protection circuit includes a first segment, a second segment, and a third segment located between the first segment and the second segment, and the touch panel further comprises an insulating layer covering the connecting lines, the first segment and the second segment of the second electrostatic discharge protection circuit, and the extending portions, and the third segment is disposed on the insulating layer and coupled downward to the first segment and the second segment via two contact windows within the insulating layer.
3. The touch panel according to claim 2 , wherein the connecting lines, the first segment and the second segment of the second electrostatic discharge protection circuit, and the extending portions are formed of an identical metal layer.
4. The touch panel according to claim 2 , wherein the third segment and at least a portion of the touch sensing array are formed of an identical transparent conductive material layer.
5. The touch panel according to claim 1 , further comprising an insulating layer covering the connecting lines and the second electrostatic discharge protection circuit, each of the extending portions being disposed on the insulating layer and coupled downward to the corresponding connecting line via a contact window within the insulating layer.
6. The touch panel according to claim 5 , wherein the connecting lines and the second electrostatic discharge protection circuit are formed of an identical metal layer.
7. The touch panel according to claim 5 , wherein the extending portions and at least a portion of the touch sensing array are formed of an identical transparent conductive material layer.
8. The touch panel according to claim 1 , wherein the first electrostatic discharge protection circuit comprises two first electrostatic discharge protection circuits located at two opposite sides of the substrate, and the second electrostatic discharge protection circuit comprises two second electrostatic discharge protection circuits located at two opposite sides of the active region.
9. The touch panel according to claim 8 , further comprising:
a first bridging line, connecting an end of each of the two first electrostatic discharge protection circuits; and
a second bridging line, connecting an end of each of the two second electrostatic discharge protection circuits.
10. The touch panel according to claim 8 , further comprising:
a first bridging line, connecting an end of the first electrostatic discharge protection circuit and an end of the second electrostatic discharge protection circuit located at the same side of the substrate with the first electrostatic discharge protection circuit; and
a second bridging line, connecting an end of the other first electrostatic discharge protection circuit and an end of the other second electrostatic discharge protection circuit located at the other side of the substrate with the other first electrostatic discharge protection circuit.