Patent ID: 8534900

Claim:
A light guide plate for a backlight, the light guide plate comprising: a total internal reflection-based light transmissive medium having two pairs of opposing sides and a top surface, and comprising a plurality of interleaved regions of elongated light extraction features provided on said top surface, each light extraction feature configured to reflect light off of a surface of the light extraction feature to thereby extract light injected into the light guide plate and into a direction that is no longer totally internally reflected within the light guide plate; wherein each elongated light extraction feature has a long dimension and a short dimension; wherein the light extraction features in a first set of said regions being arranged with their long dimension orthogonal to the long dimension of the light extraction features in a second set of said regions; and wherein within at least one of the first and second sets of regions, the light extraction features are arranged in a non-uniformly spaced parallel fashion.