An electro-optical display includes a light source and a Polarization
Separation Element ("PSE") coupled to the light source. The PSE generates
a first output having a first polarization state and a second output
having a second polarization state. The display further includes a Hetero
Polar Light Guide ("HPLG") that includes a first region optically
isolated from a second region and coupled to the PSE. The first output of
the PSE is directed into the first region and the second output of the
PSE is directed into the second region, and the first region and second
region output light in substantially the same direction.