Polarizer-free, electrically switchable and optically rewritable displays based on dye-doped polymer-dispersed liquid crystals.
This work demonstrates the feasibility of a polarizer-free, electrically switchable and optically rewritable display based on dye-doped polymer-dispersed liquid crystals (DD-PDLCs). Experimental results indicate that the doped dyes are homeotropically adsorbed onto the polymer film when an appropriate AC voltage is applied during patterning. The adsorbed dyes in the illuminated region then align the liquid crystals homeotropically, and produce a transparent pattern in the scattering background without any polarizer. Notably, the adsorbed dyes can be erased and readsorbed using thermal and optical treatments, respectively. The switching time of the fabricated display is of the order of milliseconds, and the contrast ratio is approximately 30.
Fuh
Andy Ying-Guey
AY
Department of Physics, National Cheng Kung University, Tainan 701, Taiwan.
Chen
Che-Chang
CC
Liu
Cheng-Kai
CK
Cheng
Ko-Ting
KT
D004396:Coloring Agents / Q000737:chemistry; D017076:Computer-Aided Design; D003626:Data Display; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005240:Feasibility Studies; D016247:Information Storage and Retrieval / Q000379:methods*; D050866:Liquid Crystals / Q000737:chemistry*; D055096:Optical Devices; D011108:Polymers / Q000737:chemistry; D012031:Refractometry / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*
D004396:Coloring Agents; D011108:Polymers