Patent ID: 7537374

Claim:
An edge-lit backlight having an output area, comprising: a back reflector facing the output area of the backlight; a transflector that partially transmits and partially reflects incident light, the transflector being shaped to form at least one concave structure facing the back reflector to provide one or more recycling cavities therebetween, wherein the one or more recycling cavities substantially fill the output area of the backlight; and at least one light source positioned adjacent a first edge of the backlight, wherein the at least one light source is operable to inject light into the one or more recycling cavities through an input surface of the one or more recycling cavities, wherein the input surface is substantially orthogonal to the output area of the backlight, and further wherein the at least one concave structure converges with the back reflector in a direction distal from the input surface.