A liquid crystal cell has first and second planar, approximately parallel, spaced-apart spaces between which a liquid crystal is disposed, and a plurality of light transmissive, electrically conductive electrode pairs on opposite sides of the liquid crystal corresponding to the character regions to be...http://www.google.fr/patents/US4104627?utm_source=gb-gplus-shareBrevet US4104627 - Digitale, an indicating device containing liquid crystals
Digitale, an indicating device containing liquid crystals
