1. A tactile feedback apparatus, comprising: at least one tactile feedback unit, comprising: at least one patterned feedback electrode; a dielectric layer, covering the patterned feedback electrode and having a first surface, wherein the first surface has at least one opening; and at least one reference electrode, disposed in the at least one opening of the dielectric layer and exposing at least one surface, wherein the reference electrode is isolated from the patterned feedback electrode by the dielectric layer and the reference electrode corresponding to the first surface is without either overlapping or at least partially overlapping the patterned feedback electrode.