electroluminescent solid semiconductor element as a means to check for security features luminescent.

Procedure for checking luminescent characteristics disposed within and / or on products or valuable and security, being excited luminescent characteristics for the emission of luminescence radiation using radiation from solid semiconductor elements electroluminescent spectrum wavelength not visible, characterized in that the voltage supply of the solid semiconductor elements electroluminescent performed pulsed or intermittent and / or modulated and the radiation emitted by the solid semiconductor elements cooperates with at least two security features of different coefficients decrease such a way that, by changing the conditions of pulse power supply, the observer will have different color combinations of the luminescent radiation emitted by the security features.