Diffusing structure for homogenizing light from backlighting system, has diffusing layer deposited on internal surface of glass substrate and having thickness between 3 to 20 micrometer and variable covering density to homogenize light

摘要

The structure has a transparent glass substrate (21) with internal and external surfaces, and a diffusing layer (22) deposited on the internal surface. The layer has a thickness between 3 to 20 micrometer and a variable covering density to homogenize the light from a light source (11). The external surface of the substrate is rough defined by a roughness profile with a Gaussian filter of cut length equal to 2.5 millimeter, where the profile is determined on a measured length equal to 5 times the cut length.