Study on a kind of fluorescent switch based on PDLC

Based on the switch effect of polymer dispersed liquid crystal(PDLC) and characteristics of solidified fluorescent material,a novel fluorescent switch is prepared.The fluorescent excitation effect of the switch can be modulated by electric potential.The blue LED light entered the fluorescent switch,and an ac electric field was applied on PDLC for modulation.When the fluorescent switch was in off-state,the blue LED light was inhibited.When the fluorescent switch was in on-state,the fluorescent light was generated and could be detected in the scattering direction.Experimental results demonstrate that the intensity of fluorescent light can be modulated approximately linearly by the switch when an ac electric potential is changed from 0 to 120 V.