Patent ID: 7791683
Filing Date: 2010-09-07
Classification: G02B,G02F

Abstract:
1. 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 first light source 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; and 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, the backlight system having an optical depth and further comprising