A liquid crystal device of the type including a pair of substrates having thereon a group of scanning electrodes and a group of data electrodes, and a chiral smectic liquid crystal disposed between the substrates so as to form a pixel at each intersection of the scanning electrodes and the data electrodes,...http://www.google.de/patents/US6028579?utm_source=gb-gplus-sharePatent US6028579 - Driving method for liquid crystal devices
