Privacy glass

Privacy glass is designed by principles of polymer liquid-crystal optics. In the natural state, liquid crystal droplets are aligned randomly in the polymer and the reflective index of liquid crystal does not match that of polymer (np ≠ ne), so the incident lights are scattered, resulting in a translucent state. When an electrical field is applied, the liquid crystal droplets reorients so its extraordinary relective index matches that of polymer (np = ne), resulting in a transparent state.
Typical applications include control room and command center for govenrment facilities, executive offices and conference room, special effects for entertainment industry, exhibition, and outdoor advertisement.