Electroluminescent display device

An electroluminescent display device comprising:

• a substrate divided into a display area and a non-display area;
• a first light-blocking layer and a data line disposed on the substrate in the display area;
• a first buffer layer disposed on the first light-blocking layer and the data line;
• a second light-blocking layer disposed on the first buffer layer;
• a second buffer layer disposed on the second light-blocking layer;
• a semiconductor layer and a drive semiconductor layer disposed on an upper portion of the second buffer layer and made of an oxide semiconductor;
• a gate insulating layer disposed on the semiconductor layer and the drive semiconductor layer;
• a gate electrode disposed on the gate insulating layer;
• a protective layer and a first planarization layer disposed on an upper portion of the gate electrode;
• a drain electrode disposed on an exposed part of the protective layer where a partial area of the first planarization layer is removed;
• a drive drain electrode disposed on an upper portion of the protective layer and an upper portion of the first planarization layer and electrically connected to the drive semiconductor layer;
• a second planarization layer disposed on the drain electrode, the drive drain electrode and the first planarization layer;
• and
• a light-emitting element disposed on an upper portion of the second planarization layer and comprising an anode, a light-emitting part and a cathode,
• wherein the semiconductor layer is connected to the first light-blocking layer through a first light-blocking layer contact hole, the drain electrode is connected to the semiconductor layer through a drain contact hole, and the first light-blocking layer contact hole and the drain contact hole overlap with each other,
• wherein the drive semiconductor layer is connected to the second light-blocking layer through a second light-blocking layer contact hole, the drive drain electrode is connected to the drive semiconductor layer through a drive drain contact hole, and the second light-blocking layer contact hole and the drive drain contact hole overlap with each other.