Illuminated sign with lamp masks

G - Physics – 09 – F

Patent

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Details

G09F 13/04 (2006.01) G09F 13/14 (2006.01)

Patent

CA 2401244

An illuminated sign system is disclosed that provides uniform illumination over the lamp face by using partially transmissive lamp masks located between the lamps and the sign face. The sign face itself also diffusely reflects at least a majority of light incident on its second surface back towards the interior of the sign. The combination of a diffusely reflective lamp face and partially transmissive lamp masks enhances uniformity of the sign face illumination. The lamp spacing ratio in the illuminated signs can be increased, e.g., to a ratio of 3:1 or more, and, possibly, to a ratio of 4:1 or more.

L'invention concerne un système d'enseigne illuminée offrant un éclairage uniforme sur la partie frontale de la lampe au moyen de caches de lampes partiellement transparents disposés entre les lampes et la partie frontale de l'enseigne. La partie frontale de l'enseigne réfléchit également de manière diffuse vers l'intérieur de l'enseigne au moins une majorité de la lumière arrivant par incidence sur la deuxième surface de l'enseigne. La combinaison d'une partie frontale de lampe réfléchissante par diffusion et de caches de lampes partiellement transparents améliore l'uniformité de l'éclairage de la partie frontale d'enseigne. Le rapport d'espacement de lampe des enseignes illuminées peut être augmenté, par ex. à un rapport de 3:1 ou plus, éventuellement à un rapport de 4:1 ou plus.

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