Patent ID: 8493376

Claim:
A driver circuit structure integrated in a display panel, and the driver circuit structure comprising: a plurality of transistors, wherein each of the transistors has a source electrode electrically connected to a first electrode line, and a drain electrode electrically connected to a second electrode line, respectively; a backup transistor, wherein the backup transistor has a source electrode not electrically connected to the first electrode line, and/or a drain electrode not electrically connected to the second electrode line; a gate electrode layer and a contact pad on a substrate; a first insulation layer on the gate electrode layer and the contact pad; and a semiconductor layer overlying the first insulation layer on the gate electrode layer, wherein: the source/drain electrodes of the transistors are on the semiconductor layer, and the source/drain electrodes of the transistors are electrically connected to the first/second electrode lines, respectively; the first electrode line and/or the second electrode line overlap part of the contact pad; and the backup transistor has a source electrode and/or a drain electrode extending to define an extending part on the contact pad.