Abstract: A display unit has a light source, an indicia bearing diffusion sheet or transparent having masked, transparent and translucent areas and a series of refractive layers are placed over the diffusion sheet. On the light being lit, and the light rays passed outwardly through the transparent or translucent areas and through the refractive layers, the indicia are each surrounded with a penumbra of light which gives a three dimensional effect to the display of the indicia.

Abstract: A display unit for displaying indicia such as advertising material has a light box in which there are a series of lights. The box has a reflective surface capable of passing light outwardly from inside the box but reflecting light applied exteriorly of the surface. Indicia are mounted within the box carrying translucent and washed areas. Lighting of the lights displays the indicia and extinguishing the lights results in a mirrored surface only being apparent.Modification include making the masked areas of a reflective material to give a repeated reflection effect when the lights are lit.