Array substrate and display panel

A display panel comprising an array substrate, the array substrate comprising:

• a substrate;
• a first conductive layer disposed on the substrate, the first conductive layer comprising a source and a light-shielding electrode spaced apart from the source;
• a second conductive layer disposed on a side of the first conductive layer away from the substrate, the second conductive layer comprising a blocking electrode connected to the source;
• a first insulating layer disposed on the side of the first conductive layer away from the substrate, the first insulating layer being provided with a first via hole opposite to the source;
• an oxide active layer disposed on a side of the first insulating layer away from the substrate, the oxide active layer comprising a channel portion and a source contact portion on a side of the channel portion;
• a second insulating layer disposed, on a side of the oxide active layer away from the substrate, to be opposite to the channel portion;
• and
• a third conductive layer disposed on a side of the second insulating layer away from the substrate, the third conductive layer comprising a gate disposed opposite to the channel portion,
• wherein the channel portion is disposed opposite to the light-shielding electrode;
• a part of the source contact portion is disposed in the first via hole and connected to the blocking electrode;
• and
• the blocking electrode is disposed between the source contact portion and the source to block metal elements in the source from diffusing toward the source contact portion.