Transparent waveguide display for tiling a display having plural optical powers using overlapping and offset FOV tiles

An apparatus for displaying an image comprising:

• at least one source of image modulated collimated light over an angular range;
• at least one waveguide layer comprising gratings for:
• coupling said light into a waveguide path;
• wherein said gratings comprise a first element and a second element for forming an exit pupil configured to view a tiled field of view (FOV) displaying the image modulated light;
• wherein each element diffracts light out of the waveguide towards the exit pupil and provides a beam expansion in a first direction;
• wherein the first element and the second element are partially overlapping and laterally offset;
• wherein the tiled FOV comprises a first FOV tile and a second FOV tile;
• wherein the first FOV tile and the second FOV tile are partially overlapping and laterally offset;
• wherein the source of image modulated collimated light is configured to be electronically switchable between displaying first image data for projection within the first FOV tile and displaying second image data for projecting within the second FOV tile;
• wherein the first element has a first optical power for forming the first FOV tile at a first distance from the exit pupil;
• wherein the second element has a second optical power for forming the second FOV tile at a second distance from the exit pupil;
• and
• wherein the first distance and the second distance are different.