A liquid crystal display device includes a display element containing a liquid crystal display composition for operating in the twisted nematic mode and a two-frequency matrix-addressing circuit for driving the display element. The liquid crystal composition has a critical frequency f.sub.c such that...http://www.google.fr/patents/US4417785?utm_source=gb-gplus-shareBrevet US4417785 - Liquid crystal display with negative timing signal and dielectric inversion
Liquid crystal display with negative timing signal and dielectric inversion
