Patent ID: 7379148

Claim:
A substrate for a display device, comprising: a base substrate including a display region and a driving circuit region; a plurality of switching transistors formed in the display region, each of the switching transistors including amorphous silicon; a plurality of driving transistors formed in the driving circuit region, each of the driving transistors including amorphous silicon; a protection layer formed on the base substrate to cover the switching transistors and the driving transistors; an electrode pattern formed on the protection layer, the electrode pattern including a pixel electrode electrically connected to one of the switching transistors, and a connecting electrode electrically connecting two of the driving transistors; and main signal lines for applying signals to the driving transistors, wherein the main signal lines comprise a first signal line being adjacent to the driving transistors and having a first width, and a second signal line being adjacent to the first signal line having a second width that is wider than the first width.