Array substrate with concavo-convex structure, display panel, display device and manufacturing method of array substrate

An array substrate, comprising a substrate layer, a passivation layer and a light filter layer sequentially stacked,

• wherein the substrate layer comprises a substrate and a thin film transistor layer, the thin film transistor layer is disposed on the substrate, the passivation layer covers the substrate and the thin film transistor layer, and the light filter layer is disposed on the passivation layer and is staggered from the thin film transistor layer, a side of the passivation layer facing the light filter layer is provided with a concave-convex structure, and the concave-convex structure is formed by a plurality of grooves arranged at intervals at a bottom of the passivation layer,
• wherein a cross section of each groove forms a trapezoid, a length of a bottom edge of each groove is 0 μm to 2 μm, a distance between two adjacent grooves is 0 μm to 2 μm, and a height of each groove is less than one third of the maximum thickness of the passivation layer, the concavo-convex structure is configured to diffuse and diffract light rays incident on the passivation layer from the light filter layer.