Array Substrate and Method for Manufacturing the same, Display Device

Embodiments of the present invention disclose an array substrate comprising a plurality of pixel units disposed on a base substrate (1), 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 (A) of the pixel units, the OLED comprising sequentially in a direction away from the base substrate a first electrode (11) which is transparent, a light-emitting layer (13) and a second electrode (14) which reflects light; a transflective layer (8) disposed between the OLED and the thin film transistor structure; a color filter (9) disposed between the second electrode of the OLED (14) and the transflective layer (8); the second electrode of the OLED and the transflective layer constitute a microcavity structure.