Abstract
ABSTRACTWe propose a double frequency ultraviolet (UV) exposure process that can improve the surface anchoring energy of photopolyimide (PI) embedded with reactive mesogens (RMs) for the high speed liquid crystal modes. In experiment, we polymerize the RM materials using long wavelength UV light over 340 nm, and then accomplish the polymerization of the UV alignment layer using short UV light between 254 nm and 340 nm. As results, we demonstrate the improved surface anchoring energy and the fast response time of an in-plane switching (IPS) and a twisted nematic (TN) LC modes in this paper.
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