Patent ID: 8085359

Claim:
A liquid crystal display, comprising: a liquid crystal display panel comprising pixels configured to form an image; and a folded backlight system proximate to the liquid crystal display panel and configured to illuminate the pixels of the liquid crystal display panel, the folded backlight system comprising a light guide including a plate portion generally parallel to the liquid crystal display panel, a first side portion extending generally perpendicularly from the plate portion, a first fold portion coupling the first side portion to the plate portion, and a low index region coupling the first fold portion to the plate portion, the plate portion having first and second faces and the first side portion having a third face, wherein the first, second and third faces are generally parallel and noncoplanar with respect to one another, a light source configured to emit light into the light guide at the third face of the first side portion, and a heat sink coupled to the light source and configured to remove heat generated by the light source during operation, and wherein the low index region is configured to prevent light emitted by the light source from entering the plate portion at angles that fail to meet total internal reflection (TIR) conditions within the plate portion, and wherein the light source includes a first LED and a second LED, respectively configured to emit light of a first chromaticity and a second chromaticity, and wherein the first side portion mixes the light of the first chromaticity and light of the second chromaticity within the first side portion to produce light of a third chromaticity, and wherein the first side portion has a length sufficient to mix the light of the first chromaticity and the light of the second chromaticity such that the light of a third chromaticity is produced prior to reaching the plate portion.