A dual phosphor screen is deposited on the inside surface of the faceplate f a CRT. A photo electroluminescent panel made up of a layer of photoconductive material and a layer of electroluminescent material is placed on the outside surface of the CRT. A voltage is applied across the panel so that when ultraviolet energy illuminates the photoconductive material, the voltage change across the panel causes the electroluminescent material to be visible.
A direct view cathode ray storage tube utilizes a thin film electroluminescent layer as a part of the target structure so that the electron beam writes information on the phosphor layer and written areas of the phosphor layer activate corresponding areas of the electroluminescent layer so that these areas are illuminated thereby visibly displaying such information which are stored by the electroluminescent layer so long as sustain pulses are applied thereto. Selective erasure of the written displayed information can also be accomplished.
