Patent ID: 7230272

Claim:
An active matrix substrate comprising a substrate and a transistor formed on the substrate, the transistor including a gate electrode, a gate insulating layer covering the gate electrode, a semiconductor layer formed on the gate insulating layer, and a source electrode and a drain electrode formed on the semiconductor layer, wherein, when viewed in a normal direction of the substrate, the active matrix substrate includes: a first region in which the gate electrode overlaps the source electrode via the semiconductor layer; a second region in which the gate electrode overlaps the drain electrode via the semiconductor layer; and a third region in which the semiconductor layer overlaps neither the gate electrode, the source electrode, nor the drain electrode, the third region including a portion adjoining a portion of the source electrode lying outside the first region and/or a portion adjoining a portion of the drain electrode lying outside the second region; the gate electrode includes: a main body, which includes portions constituting the first region and the second region; and a protrusion from the main body; and at least a part of the protrusion of the gate electrode is in between the drain electrode and the portion of the third region adjoining the source electrode.