Ferroelectric LCD Operating Principle
- An FLCD acts as a classical half-wave plate, one whose optic axis
can be reoriented by an applied field:
- If the optic axis is parallel or perpendicular to incoming polarized
light, the light passes through the FLCD unchanged and is blocked
by the exit polarizer (oriented at 90o to the entrance polarizer)
- If the optic axis makes an angle of 45o to the incoming polarized
light, the direction of polarization changes by 90o and is able to
pass through the exit polarizer
- Orientation of the FLC molecules is
changed by applying a voltage pulse