Patent ID: 8903207

Claim:
A head up display for providing light from an image source, the image source comprising a backlight having a first bank and a second bank, the head up display comprising: a first waveguide having a first input coupler and a first output coupler; and a second waveguide having a second input coupler and a second output coupler, the first waveguide having a first major surface and the second waveguide having a second major surface, wherein the first major surface being disposed approximately parallel to the second major surface, wherein the first waveguide and the second waveguide being positioned as a combiner and allow viewing of an outside scene and information from the image source, wherein the first input coupler diffracts light in a first field of view into the first waveguide and light in a second field of view reaches the second input coupler and is diffracted into the second waveguide wherein light from the first bank and light from the second bank is switched in synchronism with control of light through the first input coupler.