Backlight with structured surfaces

Optical waveguides – Noncyclindrical or nonplanar shaped waveguide

Reexamination Certificate

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Details

C385S033000, C385S901000, C359S619000

Reexamination Certificate

active

07873256

ABSTRACT:
A backlight includes a lightguide, a light source disposed with respect to the lightguide to introduce light into the lightguide and a turning film. Optical structures are formed in one of an output surface and a back surface of the lightguide. The optical structures are arranged to extract light from the lightguide. A back reflector is disposed adjacent the back surface. The optical structures are formed to include a varying pattern arranged to mask non-uniformities in the output of the lightguide.

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