A fluorescent europium chelate is used as the active medium of an experimental display panel. When the chelate is dissolved in an electrolytic solvent and placed between transparent conductive electrodes, 2.8 V dc will cause the ultraviolet stimulated fluorescence to be extinguished at the cathode electrode. Recovery from the quenched state occurs spontaneously when the voltage is removed or when the polarity of the potential is reversed. A cross-conductor matrix display is discussed where discrete points are quenched by applying half-voltage to the rows and columns of the matrix.