Display for augmented reality or virtual reality

An augmented reality or virtual reality display device, comprising:

• a first projector and a second projector;
• at least one waveguide assembly, comprising at least one waveguide;
• a first input diffractive optical element positioned in or on the at least one waveguide assembly configured to receive light from the first projector and to couple the light into the at least one waveguide;
• a second input diffractive optical element positioned in or on the at least one waveguide assembly configured to receive light from the second projector and to couple the light into the at least one waveguide;
• an output diffractive optical element positioned in or on the at least one waveguide assembly configured to couple light out of the at least one waveguide towards a notional viewing position;
• wherein the first projector is configured to provide light to the first input diffractive optical element in a direction that is at a first angle to a waveguide normal vector, and the second projector is configured to provide light to the second input diffractive optical element in a direction that is at a second angle to the waveguide normal vector;
• wherein the output diffractive optical element is configured to couple light out of the at least one waveguide in a first range of angles for light from the first projector and in a second range of angles for light from the second projector, wherein the first range of angles and the second range of angles are different but are partially overlapping;
• and
• wherein the first and second angles are angled respectively away from the output diffractive optical element.