The present invention discloses an array substrate, a display panel, and a display device, for solving a problem of tip discharge a comb pixel electrode comprised in a sub-pixel unit in the prior art, which produces discharge to surrounding data lines, gate lines, and neighboring pixel electrodes, so that neighboring sub-pixel units are subject to interference and display effect is influenced. The array substrate comprises a base plate, the base plate is further provided with a plurality of sub-pixel units, each of the sub-pixel units comprises a pixel electrode of a comb structure, and the base plate is further provided with a shielding electrode which is electrically connected with the pixel electrode.