A liquid crystal device is constituted by a pair of substrates each having thereon an electrode, and a smectic liquid crystal having a plurality of smectic liquid crystal layers disposed between the substrates. The smectic liquid crystal is disposed to form a first region wherein the smectic liquid crystal...http://www.google.com.au/patents/US5932136?utm_source=gb-gplus-sharePatent US5932136 - Liquid crystal device and liquid crystal apparatus
