Also called Smart glass or switchable glass, is a laminated glass comprising of a Polymer Dispersed Liquid Crystal (PDLC) film attached on or between two layers of glass with conductive
interlayers.
When electricity current is applied to the PDLC film, the liquid crystals line up changing the glass from opaque to clear.
Conversely, when electricity is off, the liquid crystals return to their initial dispersed positions changing the glass back to opaque.