Patent ID: 7312471

Claim:
An array substrate for a liquid crystal display device, comprising: a substrate having a display region and a peripheral region; a gate line over the substrate; a data line crossing the gate line; a switching thin film transistor connected to the gate line and the data line; a gate driver connected to the gate line; a data driver connected to the data line; and a drive circuit connected to the gate driver and the data driver, wherein the gate line, the data line and the switching thin film transistor are formed in the display region, wherein the gate driver, the data driver and the drive circuit are formed in the peripheral region, wherein the drive circuit includes a drive thin film transistor, wherein each of the switching thin film transistor and the drive thin film transistor includes an active layer, a gate electrode, and source and drain electrodes, wherein the active layer includes polycrystalline silicon having square shaped grains, wherein the gate electrode overlaps the active layer to form a channel region, wherein the channel region of the drive thin film transistor is formed inside one of the grains, and wherein regions of the gate electrode, the source electrode and the drain electrode of the drive thin film transistor are disposed in different grains from the one of the grains of the channel region.