Display device

A display device, comprising:

• a substrate;
• a polycrystalline semiconductor layer on the substrate, the polycrystalline semiconductor layer including a channel, a first electrode, and a second electrode of a first transistor and a channel, a first electrode, and a second electrode of a second transistor;
• a first gate conductor layer including a gate electrode of the first transistor overlapping the channel of the first transistor, and a gate electrode of the second transistor overlapping the channel of the second transistor;
• an oxide semiconductor layer on the substrate, the oxide semiconductor layer including a channel, a first electrode, and a second electrode of a third transistor;
• a second gate conductor layer including a lower gate electrode of the third transistor overlapping the channel of the third transistor;
• a third gate conductor layer including an upper gate electrode of the third transistor overlapping the channel of the third transistor;
• a first data conductor layer including a first initialization voltage supply line electrically connected to the second transistor, a second initialization voltage supply line, and a first connection electrode electrically connected to the second electrode of the third transistor and the gate electrode of the first transistor;
• and
• a fourth transistor connected to the second initialization voltage supply line,
• wherein the second initialization voltage supply line is disposed on the same layer as the first initialization voltage supply line.