Embodiments of the present invention disclose an array substrate comprising a plurality of pixel units disposed on a base substrate, the pixel units comprising: a thin film transistor structure formed on the base substrate; and an OLED driven by the thin film transistor structure, the OLED disposed in a pixel region of the pixel units, the OLED comprising sequentially in a direction away from the base substrate a first electrode which is transparent, a light-emitting layer and a second electrode which reflects light; a transflective layer disposed between the OLED and the thin film transistor structure; a color filter disposed between the second electrode of the OLED and the transflective layer; the second electrode of the OLED and the transflective layer constitute a microcavity structure.