Patent ID: 7952551

Claim:
An electro-optical device comprising: a substrate; a pixel electrode; a transistor electrically connected to the pixel electrode and including (i) a semiconductor layer having a channel region, (ii) a first gate electrode above the semiconductor layer and overlapping the channel region, and (iii) a second gate electrode below the semiconductor layer and overlapping the channel region; a data line disposed above the first gate electrode and connected to the semiconductor layer via a first contact hole; a pixel-potential-side capacitor electrode electrically connected to the semiconductor layer and the pixel electrode and constituting a storage capacitor; a relay layer formed from the same film as the data line, connected to the pixel-potential-side capacitor electrode via a second contact hole, and electrically connected to the pixel electrode; a scanning-line driving circuit that supplies a scan signal to the first and second gate electrodes; an output line formed from the same film as the data line and allowing the scan signal from the scanning-line driving circuit to pass therethrough; a first scanning line formed from the same film as the first gate electrode and connected to the output line via a third contact hole, the third contact hole being opened in the same process of opening the first contact hole; and a second scanning line formed from the same film as the second gate electrode and connected to the output line via a fourth contact hole, the fourth contact hole including a first opening opened in the same process of opening the first contact hole and a second opening opened in the same process of opening the second contact hole, the first opening and the second opening overlapping each other, wherein the pixel electrode, the transistor, the data line, the pixel-potential-side capacitor electrode, the relay layer, the scanning-line driving circuit, the output line, the first scanning line, and the second scanning line are disposed above the substrate.