LED traffic signal load switch

Details LED traffic signal load switch LED traffic signal load switch

2006-06-06

2006-06-06

Nguyen, Hung (Department: 2636)

Communications: electrical

Traffic control indicator

C340S910000, C340S916000, C340S917000, C340S931000, C340S641000, C200S019370

Reexamination Certificate

active

07057529

ABSTRACT:
An LED traffic signal having a single switching power supply placed inside the load switch to supply power to each of the aspect signals. The traffic signal has several aspects, such as red, yellow and green. The load switch comprises a switching power supply to supply power to the signals, an output selection circuit to select the desired aspect, and a conflict monitor interface circuit to mimic an incandescent circuit.

REFERENCES:
patent: 4408180 (1983-10-01), Metz
patent: 5327123 (1994-07-01), Heimann et al.
patent: 5612596 (1997-03-01), Wiese
patent: 6150771 (2000-11-01), Perry
patent: 6153985 (2000-11-01), Grossman

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