WAVEGUIDE WITH ASYMMETRIC OUTCOUPLING

摘要

A waveguide (1), arranged to guide light from at least one light source (3), comprising an outcoupling structure (4) adapted to enable outcoupling of said light from said waveguide in a general outcoupling direction, and at least one guiding edge (5) adapted to contain said light in said waveguide by reflecting said light on its way towards said outcoupling structure, wherein the outcoupling structure comprises an asymmetrically diffusing layer (6; 7). Such asymmetric diffusion improves the color mixing, and removes or limits the occurrence of color bands or intensity bands, while limiting the divergence in the direction where no color mixing or intensity variation problems exist.