Patent attributes
A backlight device provides light in a first optical band to a spatial light modulator, and is transmissive to light in a second optical band. The backlight device includes a structured dichroic reflector that is substantially reflective, and scatters light in the first optical band. The structured dichroic reflector is also substantially transparent in the second optical band, and the second optical band is different than the first optical band. The backlight device is configured to receive light in the first optical band from an illumination source. The dichroic reflector is configured to reflect light in the first optical band toward a display panel that converts the light from the backlight device to image light. The backlight device may be part of a head-mounted display.