Patent ID: 8098347

Claim:
A backlight for a stereoscopic 3D liquid crystal display apparatus, comprising: a light guide comprising: a light emission surface and an opposing light extraction surface; a first side extends between the light emission surface and the light extraction surface; a second side extends between the light emission surface and the light extraction surface, the second side opposing the first side; a centerline extends parallel to the first side and second side and is equidistant from the first side and the second side; a center elongated prism extends along the centerline and forms a portion of the light extraction surface; a plurality of elongated prisms that are contiguous from the centerline and form the light extraction surface and extend parallel to the center elongated prism wherein the prisms are progressively more canted for each subsequent elongated prism further from the center elongated prism; and a plurality of light sources disposed along the first side and the second side.