A display device comprising: an illumination module comprising: at least one color mixing element comprising a first dichroic beam combiner element and a second dichroic beam combiner element , the first dichroic beam combiner element comprising a prism; a plurality of light emitters butt coupled to the at least one color mixing element , the plurality of light emitters comprising: a first light emitter configured to emit light of a first color into the at least one color mixing element ; and a second light emitter configured to emit light of a second color into the at least one color mixing element ; and at least one diffuser , wherein the at least one color mixing element is configured to combine the light of the first color and the light of the second color; a waveguide disposed with respect to the illumination module configured to receive at least some of the combined light from the illumination module such that at least some of the received light is guided therein by total internal reflection; one or more turning elements disposed relative to the waveguide configured to redirect and eject light out of the waveguide ; and a spatial light modulator disposed with respect to the waveguide configured to receive and modulate light ejected from the waveguide . an illumination module comprising: at least one color mixing element comprising a first dichroic beam combiner element and a second dichroic beam combiner element , the first dichroic beam combiner element comprising a prism; a plurality of light emitters butt coupled to the at least one color mixing element , the plurality of light emitters comprising: a first light emitter configured to emit light of a first color into the at least one color mixing element ; and a second light emitter configured to emit light of a second color into the at least one color mixing element ; and at least one diffuser , at least one color mixing element comprising a first dichroic beam combiner element and a second dichroic beam combiner element , the first dichroic beam combiner element comprising a prism; a plurality of light emitters butt coupled to the at least one color mixing element , the plurality of light emitters comprising: a first light emitter configured to emit light of a first color into the at least one color mixing element ; and a second light emitter configured to emit light of a second color into the at least one color mixing element ; and a first light emitter configured to emit light of a first color into the at least one color mixing element ; and a second light emitter configured to emit light of a second color into the at least one color mixing element ; and at least one diffuser , wherein the at least one color mixing element is configured to combine the light of the first color and the light of the second color; a waveguide disposed with respect to the illumination module configured to receive at least some of the combined light from the illumination module such that at least some of the received light is guided therein by total internal reflection; one or more turning elements disposed relative to the waveguide configured to redirect and eject light out of the waveguide ; and a spatial light modulator disposed with respect to the waveguide configured to receive and modulate light ejected from the waveguide . <EOS>