Structure of LED lighting chain

Details Structure of LED lighting chain Structure of LED lighting chain

2007-01-10

2008-11-11

Vo, Tuyet (Department: 2821)

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Flashers

C315S20000A, C315S18500S, C315S205000, C315S312000

Reexamination Certificate

active

07449839

ABSTRACT:
A LED lighting chain is disclosed to include a front plug, a rear plug, an AC-DC converter formed of four rectifying diodes, and a LED serial set, wherein the LED serial set has a voltage dropping device formed of a resistance and two capacitors so arranged that changing the resistance and capacitors relatively changes the voltage of the LED serial set, and therefore increasing the number of LEDs does not change the brightness of the LED serial set. Further, a resistance is connected in parallel to each capacitor of the voltage dropping device so that when power is off, residual electric energy is discharged out of the capacitors to ensure safety of the LED lighting chain and to prevent damage to the LEDs during start.

REFERENCES:
patent: 6972528 (2005-12-01), Shao
patent: 7250730 (2007-07-01), Allen
patent: 7265496 (2007-09-01), Allen

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