Journal of Applied Physics
It is demonstrated that the reflective properties and bistability of cholesteric liquid crystals can be controlled by proper surface treatment and dispersed polymers. Dispersing a polymer in the liquid crystal or using a cell with an inhomogeneous surface anchoring creates permanent defects which result in long-term bistability, high contrast at large viewing angles, and gray scale. The wide-angle, reflective feature makes cholesteric materials suitable for displays without backlights and bistability provides flicker-free operation.
Yang, Deng-Ke; West, John L.; Chien, Liang-Chy; and Doane, J. William (1994). Control of Reflectivity and Bistability in Displays Using Cholesteric Liquid-Crystals. Journal of Applied Physics 76(2), 1331-1333. doi: 10.1063/1.358518 Retrieved from http://digitalcommons.kent.edu/cpippubs/146