Technical background of polymer dispersed liquid crystal

Polymer dispersed liquid crystal was invented by Dr. Donne's team in 1984, with the US patent of 4,688,900. This technology uses phase separation technology to form liquid crystal particles, which is technically called polymer dispersed liquid crystal technology or PDLC technology. Before this, no one could explain the phenomenon that the epoxy resin used to seal the bottle mouth of LCD often changed from transparent to milky white. PDLC simplifies the production process. This technology uses water-insoluble polymer monomers, such as epoxy resin and curing agent, to mix with liquid crystal to form a transparent solution. When curing occurs, liquid crystal particles will automatically precipitate and suspend in the polymer phase due to the decrease of solubility.