Array substrate, display panel and display device

An array substrate in a liquid crystal display, comprising:

• a planarization layer covered on the array substrate, the planarization layer forming a planar plane on the array substrate and an orientation film being uniformly dispersed on the planarization layer,
• wherein:
• the planarization layer is in a shape of a frame, and the planarization layer in the shape of the frame is set on and extends to a non-display area of the array substrate, inner dimensions of the frame of the planarization layer are the same as dimensions of a display area of the array substrate,
• a via hole is formed in the non-display area of the array substrate and covered by the planarization layer,
• the orientation film is formed uniformly on the planarization layer by an orientation solution,
• the planarization layer is a resin laver,
• the resin layer comprises black resin,
• the resin layer comprises a dipentaerythritol pentaacrylate/dipentaerythritol hexaacrylate, and
• a thickness of the planarization layer is not less than 0.9 μm and in a position where the via hole is formed not less than a depth of the via hole.