A bistable color reflective cholesteric display (RCD) is developed, using a unique cholesteric materials containing a tunable chiral material (TCM). The chirality of such cholesteric materials can be altered using photo-tuned lithography. The pitch length of each region can be tuned to reflect a different color, thereby creating different color pixels in the liquid crystal material itself.
L.-C. Chien, F. Vicentini, Y. Lin, U. Müller, "Color Pixelization of Cholesteric Materials" in Proc. IS&T 3rd Color and Imaging Conf., 1995, pp 58 - 59, https://doi.org/10.2352/CIC.1995.3.1.art00015