Patent ID: 7969522

Claim:
A display substrate, comprising: a display area comprising a plurality of pixels; and a peripheral area surrounding the display area, wherein each of the pixels comprises: a contact electrode disposed on an end portion of a switching element disposed on a base substrate; a semiconductor pattern comprising a protrusion disposed under the contact electrode and protruding beyond the contact electrode; and a transparent electrode contacting the contact electrode and the protrusion, wherein the peripheral area comprises a driving part, the driving part comprising a first thin-film transistor and a second thin-film transistor, wherein the second thin-film transistor comprises a drain electrode and a protrusion pattern disposed under the drain electrode and protruding in a horizontal direction from a side surface of the drain electrode, the drain electrode being formed from the same layer as the contact electrode, the protrusion pattern being formed from the same layer as the semiconductor pattern, and wherein the drain electrode of the second thin-film transistor is electrically connected to a gate electrode of the first thin-film transistor through a contact pattern.