NAVDisplay glazing is a sandwich of conventional glass laminated to liquid crystal technology. A typical interior glazing unit is made of a sheet of 5 or 6 mm annealed glass on each side, with the liquid crystal Switchable Privacy Film packaged in between. The film package consists of two layers of transparent conductive films enclosing PDLC (Polymer Dispersed Liquid Crystal) material. The film includes electrical wiring that connects to a transformer, which supplies power for the pane’s operation.
PDLC is a medium whose light scattering power is adjustable through applying an electric field. In their natural (uncharged) state, the PDLC droplets randomly align. The ordinary refractive index of these liquid crystals does not match that of the polymer, so the incident light is scattered white translucent. When an electric field is applied across the material, the PDLC droplets re-orient, and incident light can pass through, resulting in the transparent state.