An enhanced electroluminescent sign containing a volumetric, anisotropic
scattering element to control the angular spread of light from the sign
and the spatial luminance uniformity of the sign. The anisotropic
scattering element contains one or more regions of asymmetrically-shaped
light scattering particles. The angular spread of light leaving a sign
from a light emitting source can be efficiently controlled by using a
thin, low cost, volumetric, anisotropic scattering elements to angularly
and spatially distribute light, permitting the reduction in number of
light sources, a reduction in power requirements, or a more tailored
viewing angle.