The invention discloses a light engine array having at least an anode and a cathode comprising: a first type semiconductor layer; an active layer; and a second type semiconductor layer; a cathode electrode has a conductive metal layer in electrical contact with a portion of the first type semiconductor layer, and the second type semiconductor layer to form a short circuit structure in a common cathode region; and an anode electrode has the conductive metal layer and coupled to a portion of the first type semiconductor layer; wherein, the anode electrode is electrically isolated with the active layer and the second type semiconductor layer in a sub-pixel region.