A front light guide panel including a plurality of embedded surface
features is provided. The front light panel is configured to deliver
uniform illumination from an artificial light source disposed at one side
of the font light panel to an array of display elements located behind
the front light guide while allowing for the option of illumination from
ambient lighting transmitted through the light guide panel. The surface
embedded surface relief features create air pockets within the light
guide panel. Light incident on the side surface of the light guide
propagates though the light guide until it strikes an air/light material
guide interface at one on the air pockets. The light is then turned by
total internal reflection through a large angle such that it exits an
output face disposed in front of the array of display elements.