TPRS Wizard glass
Smart glass or switchable glass or privacy glass is a glass or glazing whose light transmission properties are altered when voltage is applied. In general, the glass changes from transparent to translucent and vice versa, changing from letting light pass through to blocking some (or all) wavelengths of light and vice versa. When the electrical supply is switched on, the liquid crystal molecules align, incident light passes through and the privacy glass panel instantly clears. When the power is switched off the liquid crystal molecules are randomly oriented, thus scattering light and the privacy glass becomes opaque (private).