How are LCDs created?

LCDs are created by sandwitching a thin (10 to 12um) layer of a liquid-crystal fluid between two glass plates. A transparent, electrically conductive film or backplane is put on the rear glass sheet. Transparent sections of conductive film in the shape of the deviced character are coated on the front glass plate. When a voltage is applied between a segment and the backplane, an electric field is created in the region under the segment. This electric field change the transmission of light through the region under the segment film.