Organic light emitting diode display device including vertically stacked electrodes on driving transistor

An organic light emitting diode display, comprising:

• a data line;
• a driving voltage line transmitting a driving voltage;
• an organic light emitting element;
• a first transistor electrically connected between the driving voltage line and the organic light emitting element;
• an overlapping layer;
• and
• a second electrode,
• wherein:
• the first transistor includes:
• a first semiconductor layer having a first channel of the first transistor;
• and
• a first gate electrode overlapping and disposed under the first channel of the first transistor,
• the overlapping layer and the second electrode overlap the first channel of the first transistor in a vertical direction,
• the overlapping layer and the second electrode receive the driving voltage, and
• the first gate electrode of the first transistor has a voltage level varying in order to control a brightness of the organic light emitting element.