Organic light emitting display device

An organic light emitting display device comprising:

• an organic light emitting device including an anode electrode, a cathode electrode, and an organic light emitting layer disposed between the anode electrode and the cathode electrode;
• and
• a pixel circuit which supplies electric current to the organic light emitting device
• and includes an initialization transistor comprising:
• a substrate;
• an active layer disposed on the substrate;
• a first insulation layer on the active layer;
• a gate electrode disposed on the first insulation layer;
• a second insulation layer on the active layer;
• a drain electrode connected to a drain area of the active layer exposed by a contact hole of a second insulation layer, and
• a third insulation layer on the drain electrode,
• wherein a source area of the initialization transistor is connected to the cathode electrode,
• wherein the cathode electrode applies an initialization voltage to the initialization transistor, and
• wherein the cathode electrode penetrates the first insulation layer, the second insulation layer and the third insulation layer.