Power supply for LED signal
AssigneeLumination LLC
InventorJean Bourgault
Life of this patent
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Abstract
A power supply for a Light Emitting Diode (LED) traffic signal that controls the light intensity. The light intensity conforms to a predetermined pattern based on the input voltage root mean square value (Vrms). The input voltage is changed by acting on the amplitude of the sine wave or by using a triac and controlling the angle of fire. The power supply comprises a fuse module, an electromagnetic compatibility filter module, a power supply module, a LED load module, a current monitor module, a RMS-DC conversion module and a fuse blow out module.
Claims35
A power supply for a light emitting diode (LED) traffic signal comprising:
- a fuse module,
- an electromagnetic compatibility (EMC) filter module,
- a power supply module,
- a LED load module,
- a current monitor module,
- a RMS-to-DC conversion module, and
- a fuse blow out module.
A LED traffic signal comprising:
- a housing,
- a power supply system in said housing,
- wires connecting the power supply system to a printed circuit board,
- at least one LED on said printed circuit board, and
- an outer shell adapted to cover an open end of said housing,
- wherein the power supply system is to control the light intensity of a LED traffic signal to conform to a predetermined pattern, depending on the input voltage root mean square (RMS) value
Dependencies are inferred from the claim text.