Array substrate including a second electrode of the second capacitor disposed on the same layer with the power supply voltage line, OLED display panel, and display device having the same

An OLED display panel, comprising:

• an array substrate, wherein the array substrate comprises:
• a base substrate;
• and
• a pixel circuit disposed on the base substrate;
• wherein the pixel circuit at least comprises:
• a driving transistor,
• a storage capacitor, and
• a power supply voltage line;
• wherein one end of the storage capacitor is electrically connected with the power supply voltage line, and the other end of the storage capacitor is electrically connected with a grid electrode of the driving transistor;
• an active layer, a grid insulating layer, the grid electrode of the driving transistor, a first insulating layer, a storage electrode, a second insulating layer and the power supply voltage line are sequentially disposed on the base substrate;
• and
• the storage capacitor comprises:
• a first capacitor;
• and
• a second capacitor;
• wherein the first capacitor and the second capacitor are connected in parallel;
• the first capacitor comprises:
• the storage electrode;
• and
• a first electrode;
• wherein a layer where the first electrode is located is same as a layer where the grid electrode of the driving transistor is located;
• the second capacitor comprises:
• the storage electrode;
• and
• a second electrode;
• wherein a layer where the second electrode is located is same as a layer where the power supply voltage line is located, and
• the first electrode and the second electrode are electrically connected through a via hole penetrating through the first insulating layer and the second insulating layer.