Patent ID: 8107023

Claim:
A projection display, for displaying an image to an observer, including: a first waveguide element arranged to be light transmissive; an image-providing light source device arranged to generate an image and to inject image bearing light into the first waveguide element; a first grating associated with the first waveguide element arranged to direct the image bearing light internally along the first waveguide element and through which the image bearing light is outputted from the first waveguide element; a second waveguide element arranged to be light transmissive and transparent that includes a coupling grating arranged to receive the image bearing light from the first waveguide element and to direct the image bearing light along the second waveguide element; the second waveguide element further includes an exit grating arranged to diffract received image bearing light out of the second waveguide element towards an observer; and wherein the image-providing light source device is arranged to divide the image into two or more sub-images and inject each sub-image into a different input region of the first waveguide element.