Intelligent light degradation sensing LED traffic signal

Details Intelligent light degradation sensing LED traffic signal Intelligent light degradation sensing LED traffic signal

2005-03-30

2008-09-16

Lee, Wilson (Department: 2163)

Electric lamp and discharge devices: systems

With signal, indicator, or alarm

C315S130000

Reexamination Certificate

active

07425798

ABSTRACT:
The inventive signal incorporates an intelligent diagnosis module inside a light emitting diode (LED) signal, such as an LED traffic signal. The inventive signal can self-extinguish or send a signal through its communication port at the end of its useful life when the LEDs are no longer providing the required light output. Additionally, the inventive signal sends a signal to increase the current as the LEDs degrade to ensure the light output is above a threshold minimum.

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