The invention relates to a secure display device having an input port for receiving an input signal having at least one item of information to be displayed, said secure display device being characterised in that it comprises a plurality of display matrices superimposed on each other and having at least one transparent display area, each display matrix of said plurality is associated with a control means for controlling said display matrix, each of the control means being connected directly to the input port so that said display matrices of said plurality simultaneously display said at least one item of information from said input signal.
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