A haptic signalizing device , comprising: - a number of piezoelectric elements arranged below a haptic signalizing 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 haptic signalizing device surface follows the piezoelectric element ; and - a driving circuit configured to cause the converse piezoelectric effect on the at least one piezoelectric element by generating an alternating electric field over the piezoelectric element in a bipolar fashion, that is, consecutively in both the same and the opposite direction with respect to the polarization of the piezoelectric element , to make the piezoelectric element to move beyond its initial position consecutively in both directions; and wherein the piezoelectric element is arranged: - to locally move the haptic signalizing device surface inwards when the mechanical deformation in the piezoelectric element is a deflection directed away from the haptic signaling device surface , and - to locally move the haptic signalizing device surface outwards when the mechanical deformation in the piezoelectric element is a deflection that is directed towards the haptic signalizing device surface ; wherein the haptic signalizing device is configured to set the component of the alternating electric field that is in the opposite direction with respect to the polarization of the piezoelectric element depending on operating temperature, such that in a lower operating temperature the component of the alternating electric field is stronger and in a higher operating temperature the component of the alternating electric field is weaker; characterized by the component of the alternating electric field that is in the opposite direction with respect to the polarization of the piezoelectric element is configured to keep at or below the depolarization limit of the piezoelectric element in each operating temperature to obtain larger deflection amplitudes of the piezoelectric element in lower temperatures than in higher temperatures. - a number of piezoelectric elements arranged below a haptic signalizing 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 haptic signalizing device surface follows the piezoelectric element ; and - a driving circuit configured to cause the converse piezoelectric effect on the at least one piezoelectric element by generating an alternating electric field over the piezoelectric element in a bipolar fashion, that is, consecutively in both the same and the opposite direction with respect to the polarization of the piezoelectric element , to make the piezoelectric element to move beyond its initial position consecutively in both directions; - to locally move the haptic signalizing device surface inwards when the mechanical deformation in the piezoelectric element is a deflection directed away from the haptic signaling device surface , and - to locally move the haptic signalizing device surface outwards when the mechanical deformation in the piezoelectric element is a deflection that is directed towards the haptic signalizing device surface ; <EOS>