The present application discloses an array substrate. The array substrate includes a sub-pixel having a first light emitting area and a second light emitting area structurally different from the first light emitting area. The sub-pixel includes a first electrode on a base substrate; a first light emitting layer in the first light emitting area and a second light emitting layer in the second light emitting area, the first light emitting layer and the second light emitting layer made of a same material and on a side of the first electrode distal to the base substrate; and a first tuning layer between the first light emitting layer and the first electrode in the first light emitting area.