A display device having a first substrate bearing a first electrode and a second substrate bearing a second electrode, and a layer of a display material such as liquid crystal and PLZT (lead-lanthanum-zirconate-titanate ceramics) disposed between the substrates. The second substrate also bears a display...http://www.google.fr/patents/US3967253?utm_source=gb-gplus-shareBrevet US3967253 - Display device
