Patent ID: 7009254

Claim:
An electro-optical device comprising: a scanning line; a data line intersecting the scanning line; a pixel corresponding to an intersection of the scanning line and the data line; a sampling circuit that samples image signals from the data line and supplies the sampled image signals to the pixel when the scanning line is selected; an electrostatic protection circuit that includes a switching element having a first terminal and a second terminal, the first terminal being electrically connected to the second terminal when an overvoltage is applied to the first terminal; a first insulating layer covering the switching element, the first insulating layer having contact holes; a static potential wiring line formed on the first insulating layer and connected to the second terminal of the switching element through one of the contact holes of the first insulating layer, the static potential wiring line being applied with substantially constant potential; a second insulating layer covering the static potential wiring line and a first wiring line portion, the second insulating layer having contact holes; and an image signal line that transmits the image signals supplied to the sampling circuit, the image signal line including: the first wiring line portion formed of the same conductive film as the static potential wiring line, the first wiring line portion being spaced apart from the static potential line, and connected to the first terminal of the switching element through another of the contact holes of the first insulating layer, and a second wiring line portion formed on the second insulating layer, connected to the first wiring line portion through a contact hole of the second insulating layer, and extending to intersect with the static potential wiring line as viewed from a direction perpendicular to the surface of the substrate.