Study Of The Structyure Of Phase Separation By The Electric Filed Induced

Today, the research of the liquid crystal device has gradually into the"post-era of the LCD". Polymerdispersed liquid (PDLC) is one important area of the research. The PDLC mode does not need polarizer andalignment layer, but simple process and wide range of applications. It can use to the electronic paper, large sizeflexible, dimming glass, electronic curtain, grating and so on.The E-paper technology is in progress, the LCD should have a further used. In this paper, based on thePDLC mode, we proposed a new polymer dispersed liquid crystal bistable mode. It will have a bistable nature,low driving voltage, fast response, good contrast.In order to achieve bistability, we make efforts to obtain the liquid crystal structure of square droplets .When the structure of the liquid crystal droplets are square, the liquid crystal molecules will have the sameconfiguration, along the border, vertical edge distribution, are likely to stabilize. In the actual experiment, weconsider the use of applied AC electric field induced the phase separation of polymer dispersed liquid crystalprocess, to verify the AC electric field on the structure of the polymer phase separation, in order to have thepolymer oriented growth and also have a weak anchor to the liquid crystal. Polymer dispersed liquid crystalphase separation occurs in the crystallization process, the polymer will grow along the direction of electricfield or perpendicular to the electric field oriented. Because of long-chain polymer anchor role, phaseseparation is completed. The liquid crystal molecules will remain in the same direction along the arrayconfiguration, will form the bistable structure and provide a theoretical basis and experimental testing for thedevelopment of E-book.In order to investigate the formation of the square liquid crystal droplets, we have done a lot ofexperiments, including positive and negative liquid crystal in the applied AC field were directedpolymerization. Through the experiments we have the steady state structure of positive and negative liquidcrystal. The steady-state structure also has a good life, will at least to maintain more than one month. Throughthe theoretical and experimental results of comparative analysis, we can conclude that polymer dispersednematic liquid crystal will have bistable nuture. Because the limited time and energy, we have little researchabout the amphoteric liquid crystal. We are looking forward to do future research to complete the unfinishedwork and make it practical to meet the real requirements.