A reflective cholesteric liquid crystal (CLC) display device has a cholesteric liquid crystal color filter in which a plurality of protrusions is formed on an upper portion of the cholesteric liquid crystal color filter to obtain a uniform luminance and a uniform color in a main viewing angle range....http://www.google.com/patents/US7196752?utm_source=gb-gplus-sharePatent US7196752 - Cholesteric liquid crystal color filter with protrusions and associated methods of manufacture
