Embodiments of the present invention relate to a device for polarizing
light in a backlighting system of an electronic display to conserve energy. Embodiments
of the invention may comprise an optically transparent material that includes an
interface therein to separate randomly polarized light into vertically polarized
and horizontally polarized components. The optically transparent material may have
a re-polarizing layer thereon to change a polarization of one of the separated
components, and a reflective edge disposed at an angle substantially parallel to
the interface.
