A driving method for a liquid crystal display device with a cholesteric liquid crystal having a memory mode of operation including a first stage of applying a first voltage to change the state of the cholesteric liquid crystal to a homeotropic state, a second stage of applying a second voltage to change...http://www.google.co.uk/patents/US6950086?utm_source=gb-gplus-sharePatent US6950086 - Driving method for a cholesteric liquid crystal display device having a memory mode of operation and a driving apparatus
