Patent ID: 8248556

Claim:
A backlight system for a liquid crystal display, comprising: a substantially planar, refractive waveguide including a first major face and a second major face opposite the first major face, the waveguide including a viewable region corresponding to a viewable area of the liquid crystal display; a plurality of light sources positioned proximate to the second major face and within the viewing region for producing light; an injection feature proximate to one or more of the second major face and the first major face and within the viewing region to optically couple the light into the waveguide such that the light becomes waveguided light; a plurality of extraction features proximate to one or more of the second major face and the first major face and within the viewing region to optically couple the waveguided light out of the waveguide; a plurality of drivers coupled to the plurality of light sources and configured to dynamically drive the plurality of light sources based on spatial location within the viewing area; and light absorbing features configured to tune backlight chromaticity by absorbing a portion of visible spectrum from a first light source of the plurality of light sources.