A liquid crystal display apparatus includes a first liquid crystal layer having first liquid crystal exhibiting a cholesteric phase at a room temperature, and being tuned to selectively reflect light of a wavelength 1 within a visible wavelength range; and a second liquid crystal layer disposed on the...http://www.google.com.au/patents/US6833885?utm_source=gb-gplus-sharePatent US6833885 - Two layer liquid crystal display apparatus
