Organic light-emitting display apparatus

An organic light-emitting display apparatus, comprising:

• an organic light-emitting diode emitting visible light;
• a driving thin film transistor driving the organic light-emitting diode and comprising a driving gate electrode, a driving semiconductor layer, a driving source electrode, and a driving drain electrode;
• and
• a compensation thin film transistor electrically connected to the driving thin film transistor and compensating for threshold voltage of the driving thin film transistor,
• the compensation thin film transistor comprising a compensation gate electrode, a compensation semiconductor layer, a compensation source electrode, and a compensation drain electrode,
• the compensation gate electrode comprising a first gate electrode and a second gate electrode electrically connected to each other,
• the compensation drain electrode electrically connected to the driving gate electrode of the driving thin film transistor, and
• the compensation semiconductor layer comprising a first semiconductor region overlapping the first gate electrode and a second semiconductor region overlapping the second gate electrode and disposed further from the compensation drain electrode than the first semiconductor region, and an area of the first semiconductor region being less than that of the second semiconductor region.