Organic light-emitting diode display panel

An organic light-emitting diode (OLED) display panel, comprising a substrate, an OLED light-emitting layer disposed on a surface of the substrate, and a thin film encapsulation layer disposed on a surface of the OLED light-emitting layer;

• wherein
• a display area of the OLED display panel is formed with a via hole and a water blocking structure for protecting the via hole from water vapor, the water blocking structure comprises:
• a trench defined in the surface of the substrate, the trench disposed around the via hole;
• and
• a baffle wall formed in the trench and protruding from the surface of the OLED light-emitting layer;
• wherein a contour shape of the baffle wall is a same as a contour shape of the via hole, and the via hole is located at a center of the contour of the baffle wall;
• the thin film encapsulation layer comprises a water blocking layer and a stress buffer layer which are stacked on each other, and an edge of an opening of the water blocking layer is aligned with an edge of the via hole, and the stress buffer layer is formed outside the baffle wall;
• wherein the water blocking structure comprises a first sub-trench and a second sub-trench, the first sub-trench being disposed around the via hole, the second sub-trench being disposed around the first sub-trench;
• and
• a first sub-baffle wall is disposed in the first sub-trench, and a second sub-baffle wall is disposed in the second sub-trench.