Device to monitor a led traffic light

G - Physics – 08 – G

Patent

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Details

G08G 1/095 (2006.01) F21S 8/00 (2006.01) F21V 17/16 (2006.01) F21V 31/00 (2006.01) H05B 37/03 (2006.01) F21V 23/04 (2006.01)

Patent

CA 2434724

An LED signal with an LED light pipe collector and intelligent light degradation sensor. The light pipe collector captures LED light normally lost in a generally horizontal direction and redirects it into a generally vertical direction through use of total internal reflection. The light degradation sensor monitors LED signal light output. When light output degrades to a preset level, an electrical circuit triggers a disabling short circuit to deactivate the LED signal.

L'invention concerne une signalisation à diodes électroluminescentes, dotée d'un collecteur à conduite de lumière à diodes électroluminescentes et d'un capteur intelligent de dégradation de lumière. Le collecteur à conduite de lumière capture une lumière de diodes électroluminescentes normalement perdue dans un sens généralement horizontal et la redirige dans un sens généralement vertical au moyen d'une réflexion interne totale. Le capteur de dégradation de lumière surveille la sortie de lumière de la signalisation à d'iodes électroluminescentes. Lorsqu'une sortie de lumière est dégradée à un niveau prédéfini, un circuit électrique déclenche un court-circuit de désactivation permettant de désactiver la signalisation à diodes électroluminescentes.

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