Field Effect LCD

  The  Fig.  shows  the  field  effect  liquid  crystal  cell.  It  consists  of  two  glass plates, a liquid crystal fluid, polarizers and transparent conductors. The liquid crystal
fluid is sandwiched between two glass plates. Each glass plate is associated with light polarizer. The light polarizers are placed at right angle to each other. In the absence
of electrical excitation, the light coming through the front polarizer is rotated through
900  in  the  fluid  and  passed  through  the  rear  polarizer.  It  is  then  reflected  to  the viewer by the back mirror as shown in Fig.