An array substrate comprising a base substrate and a plurality of pixel units disposed on the base substrate, each of the pixel units comprising: a transflective layer formed on the base substrate; a thin film transistor structure formed over the transflective layer; and an organic light-emitting diode disposed in a pixel region of the pixel unit and driven by the thin film transistor structure, and in a direction away from the base substrate, the organic light-emitting diode sequentially comprising a first electrode that is transparent, an organic light-emitting layer and a second electrode for reflecting light; wherein the second electrode of the organic light-emitting diode and the transflective layer constitute a microcavity structure; the thin film transistor structure comprises a switching thin film transistor and a driving thin film transistor; the transflective layer is formed in the pixel region of the pixel unit and in a gate electrode region (2, 2') of the thin film transistor structure; portions of the transflective layer corresponding to the gate electrode region (2, 2') of the thin film transistor structure are disposed under a gate electrode of the switching thin film transistor and a gate electrode of the driving thin film transistor, the array substrate being characterized in that the transflective layer is patterned, patterns of the portions of the transflective layer are consistent with patterns of the gate electrode of the switching thin film transistor and the gate electrode of the driving thin film transistor, and a color filter is disposed between the second electrode of the organic light-emitting diode and the transflective layer. a transflective layer formed on the base substrate; a thin film transistor structure formed over the transflective layer; and an organic light-emitting diode disposed in a pixel region of the pixel unit and driven by the thin film transistor structure, and in a direction away from the base substrate, the organic light-emitting diode sequentially comprising a first electrode that is transparent, an organic light-emitting layer and a second electrode for reflecting light; wherein the second electrode of the organic light-emitting diode and the transflective layer constitute a microcavity structure; the thin film transistor structure comprises a switching thin film transistor and a driving thin film transistor; the transflective layer is formed in the pixel region of the pixel unit and in a gate electrode region (2, 2') of the thin film transistor structure; portions of the transflective layer corresponding to the gate electrode region (2, 2') of the thin film transistor structure are disposed under a gate electrode of the switching thin film transistor and a gate electrode of the driving thin film transistor, the array substrate being characterized in that the transflective layer is patterned, patterns of the portions of the transflective layer are consistent with patterns of the gate electrode of the switching thin film transistor and the gate electrode of the driving thin film transistor, and a color filter is disposed between the second electrode of the organic light-emitting diode and the transflective layer.