Patent ID: 7719008

Claim:
A thin film transistor substrate, comprising: a plurality of gate lines; a plurality of source lines intersecting the gate lines; a plurality of pixel electrodes provided respectively in a plurality of pixel regions defined by the pluralities of gate and source lines; and a plurality of thin film transistors provided respectively in the plurality of pixel regions, each of the plurality of thin film transistors including a gate electrode connected to one of the plurality gate lines, a source electrode connected to one of the plurality of source lines, and a drain electrode connected to one of the plurality of pixel electrodes, wherein an active layer is exposed in a channel region provided between the source and drain electrodes of each of the plurality of thin film transistors, and if the active layer protrudes outside the channel region by extending from the channel region, the active layer protrudes by a length of up to 30% or less of a width of the source line, wherein each of the plurality of source electrodes includes first and second protruding portions extending from the corresponding source line, wherein the first protruding portion partially overlaps with an edge of the gate electrode so that part of the first protruding portion, including an entire edge of a side of the first protruding portion, is located outside of an overlapping area between the gate electrode and the first protruding portion.