Organic Light-Emitting Display Apparatus

An organic light-emitting display apparatus, comprising:

• a substrate including a display region and a non-display region around the display region;
• a lower buffer layer on the substrate;
• a first thin film transistor in at least one of the display region and the non-display region, the first thin film transistor including a first semiconductor pattern, a first gate electrode, a first source electrode, and a first drain electrode on the lower buffer layer;
• an upper buffer layer on the first semiconductor pattern;
• a second thin film transistor on the upper buffer layer, the second thin film transistor including a second semiconductor pattern, a second gate electrode, a second source electrode, and a second drain electrode;
• a first light-blocking pattern between the lower buffer layer and the second semiconductor pattern, the first light-blocking pattern overlapping the second semiconductor pattern;
• and
• a storage capacitor including a first storage capacitor electrode between the first gate electrode and the first light-blocking pattern, a second storage capacitor electrode that is on a same layer as the second gate electrode and is connected to the first storage capacitor electrode, and a third storage capacitor electrode between the first storage capacitor electrode and the second storage capacitor electrode.