A haptic signalizing device, comprising: at least one piezoelectric element arranged below a device surface such that mechanical deformations caused by the converse piezoelectric effect in the at least one piezoelectric element make the device surface to move such that the device surface follows the at least one piezoelectric element; and a driving circuit (20, 30) configured to cause the converse piezoelectric effect on the at least one piezoelectric element by generating an alternating electric field over the at least one piezoelectric element in a bipolar fashion, that is, consecutively in both the same and the opposite direction with respect to the polarization of the at least one piezoelectric element, to make the at least one piezoelectric element to move beyond its initial position consecutively in both directions; characterized by a depolarization limit is determined by the haptic signalizing device by using the at least one piezoelectric element to detect when an electrical field, which is in the opposite direction with respect to the polarization of the at least one piezoelectric element, starts to depolarize the at least one piezoelectric element; wherein the depolarization limit is determined by the haptic signalizing device by using the at least one piezoelectric element to measure its mechanical deformations for determining the magnitude of a component of the electrical field that is in the opposite direction with respect to the polarization of the at least one piezoelectric element; and wherein the depolarization limit defined a point at which a rate of change of an electric current pumped to the at least one piezoelectric element increases above a set or a predetermined threshold which is a point where a transduction efficiency of the at least one piezoelectric element starts to drop; wherein the driving circuit (20, 30) is configured to cause the converse piezoelectric effect on the at least one piezoelectric element by generating the alternating electric field over the piezoelectric element so that a magnitude of the component of the alternating electrical field, which is driven to the opposite direction with the respect to the polarization, is based on the determined depolarization limit; and wherein the driving circuit (20, 30) is configured to cause the converse piezoelectric effect on the at least one piezoelectric element by generating the alternating electric field over the at least one piezoelectric element so that a magnitude of a component of the electric field, which is driven to the same direction with respect to the polarization, is based on a level where a short circuiting starts to occur at the at least one piezoelectric element. at least one piezoelectric element arranged below a device surface such that mechanical deformations caused by the converse piezoelectric effect in the at least one piezoelectric element make the device surface to move such that the device surface follows the at least one piezoelectric element; and a driving circuit (20, 30) configured to cause the converse piezoelectric effect on the at least one piezoelectric element by generating an alternating electric field over the at least one piezoelectric element in a bipolar fashion, that is, consecutively in both the same and the opposite direction with respect to the polarization of the at least one piezoelectric element, to make the at least one piezoelectric element to move beyond its initial position consecutively in both directions; characterized by a depolarization limit is determined by the haptic signalizing device by using the at least one piezoelectric element to detect when an electrical field, which is in the opposite direction with respect to the polarization of the at least one piezoelectric element, starts to depolarize the at least one piezoelectric element; wherein the depolarization limit is determined by the haptic signalizing device by using the at least one piezoelectric element to measure its mechanical deformations for determining the magnitude of a component of the electrical field that is in the opposite direction with respect to the polarization of the at least one piezoelectric element; and wherein the depolarization limit defined a point at which a rate of change of an electric current pumped to the at least one piezoelectric element increases above a set or a predetermined threshold which is a point where a transduction efficiency of the at least one piezoelectric element starts to drop; wherein the driving circuit (20, 30) is configured to cause the converse piezoelectric effect on the at least one piezoelectric element by generating the alternating electric field over the piezoelectric element so that a magnitude of the component of the alternating electrical field, which is driven to the opposite direction with the respect to the polarization, is based on the determined depolarization limit; and wherein the driving circuit (20, 30) is configured to cause the converse piezoelectric effect on the at least one piezoelectric element by generating the alternating electric field over the at least one piezoelectric element so that a magnitude of a component of the electric field, which is driven to the same direction with respect to the polarization, is based on a level where a short circuiting starts to occur at the at least one piezoelectric element.