The invention concerns a panel comprising an electroluminescent organic
layer and a photoconductive layer, having sandwiched between said two
layers, an intermediate layer of electrodes electrically insulated from
one another. The cells of said panel are provided with memory effect
which makes them particularly simple to operate; preferably, during the
addressing phases, compensation operations are used. By using the
openings in an intermediate opaque layer or by using semi-transparent
intermediate electrodes, it is possible to adapt simply and economically,
at each cell, optical coupling between the electroluminescent layer and
the photoconductive layer.