Security element for the identification of a security document and method for producing it

The Invention relates to a safety element for the identification of a Security document, in particular a banknote, a security or a paper document, having at least one electrically controllable Display element and at least one said at least one display element controlled piezoelectric energy source. The security element is by a flexible multilayer film body formed, wherein the at least one electrically controllable display element, containing directable a display layer with electrical in a field Liquid crystals and the at least one at least a display element controlling piezoelectric energy source at least one layer of piezoelectric material comprises, wherein the security element in the direction perpendicular to the plane of the the film body having a maximum thickness of 70 microns.