The method of preparing an array substrate and a display device

The present invention discloses a method for preparing an array substrate, a display device, the array substrate includes a base substrate provided with a thin film transistor, a color filter layer and the first passivation layer on the base substrate, the first a passivation layer disposed on the first electrode, the first electrode comprises an electrode region between the plaint surface, said surface region and a pixel electrode plaint means disposed corresponding to the thin film transistor, the first electrode is opaque metal electrode, the surface of the first electrode is provided with a concavo-convex structure, a concave-convex structure for dispersing external incident light. Surface of the first electrode of the invention is provided with a concavo-convex structure is provided, the irregular structure is capable of dispersing the external incident light, such that external incident light is diffusely reflected, so as to avoid excessive concentration of the light, and improve the external visibility of the display screen recognizable.