Flexible display device

A flexible display device comprising:

• a flexible substrate;
• a semiconductor layer on the flexible substrate, the semiconductor layer comprising a polycrystalline semiconductor;
• a gate insulation layer on the semiconductor layer;
• and
• a gate electrode on the gate insulation layer,
• wherein the semiconductor layer comprises a channel region, a source region, and a drain region, the source region and the drain region being at opposite sides of the channel region in a first direction,
• wherein the gate electrode comprises:
• a linear portion extending in a second direction perpendicular to the first direction and crossing the semiconductor layer to extend beyond both opposite edges of the semiconductor layer in the second direction;
• and
• a protrusion portion protruding from only one side of the linear portion in the first direction, and
• wherein the protrusion portion overlaps the channel region of the semiconductor layer in a plan view.

A flexible display device comprising:

• a flexible substrate;
• a semiconductor layer on the flexible substrate, the semiconductor layer comprising a polycrystalline semiconductor;
• a gate insulation layer on the semiconductor layer;
• and
• a gate electrode on the gate insulation layer,
• wherein the semiconductor layer comprises a channel region, a source region, and a drain region, the source region and the drain region being at opposite sides of the channel region,
• wherein the semiconductor layer and the gate electrode each have an asymmetrically bent structure,
• wherein a bent direction of the semiconductor layer and a bent direction of the gate electrode are different from each other,
• wherein the channel region and the gate electrode overlap each other in a plan view, and
• wherein the channel region is at a portion where the semiconductor layer is asymmetrically bent.