An array substrate includes a first light-shielding insulation layer formed on the substrate, for block a light entering the substrate, and including a first region and a second region, and each is made of an insulation material; a first function layer formed on the second region, under a light-shielding function of the second region, an affection of light is avoided; a second function layer formed above the first region of the first light-shielding insulation layer and the first function layer, under the light-shielding function of the first light-shielding insulation layer, an affection of light is avoided; and a third function layer formed above the second function layer, under the light-shielding function of the first light-shielding insulation layer, an affection of light is avoided; wherein, each of the first, the second and the third function layer is a conductor material or a semiconductor material. A photo-leakage current can be avoided.