LED light string without additional resistors

Details LED light string without additional resistors LED light string without additional resistors

2008-09-30

2011-11-08

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Plural series connected load devices

Christmas lights

C315S18500S, C315S201000, C315S312000

Reexamination Certificate

active

08053995

ABSTRACT:
An electrical circuit for use as a string of lights in one embodiment includes a rectifier for converting AC into DC; and a plurality of lamps connected in series, each lamp having an LED, and wherein at least one of the lamps each has a Zener diode connected in series with the LED, a positive terminal of the lamp proximate the rectifier is connected to a positive terminal of an output of the rectifier, and a negative terminal of the lamp distal the rectifier is connected to a negative terminal of the output of the rectifier. In another embodiment, the Zener diode is replaced with a resistor. Hence, no resistors are provided externally of the lamp.

REFERENCES:
patent: 6448900 (2002-09-01), Chen
patent: 2007/0236443 (2007-10-01), Lee
patent: 2009/0159677 (2009-06-01), Yakimov et al.
patent: 101247043 (2008-08-01), None

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