F - Mech Eng,Light,Heat,Weapons – 21 – S
Patent
F - Mech Eng,Light,Heat,Weapons
21
S
F21S 4/00 (2006.01) F21V 23/00 (2006.01)
Patent
CA 2571972
Various embodiments are described herein that provide a decorative light string that comprises one or more branch circuits, each of the branch circuits being parallelly connected to each other, and then connected to a common power supply wire for importing an operational voltage during use. Each branch circuit comprises a plurality of light groups that are serially connected in turn. Each of the light groups comprise a first LED, and further comprise a protective diode parallelly connected with the first LED in a reverse direction. The protective diode may be a rectifier diode, a zener diode, a switching diode or a second LED. The protective diode can be parallelly connected with the first LED in the reverse direction via a welding or soldering manner to share a pair of pins with the first LED. Further, a chip of the protective diode and a chip of the first LED may be installed in a common housing to form an integrative component, thus reducing the number of connecting wires that are needed. The various decorative light strings described herein are more economical, more reliable in performance, and have a longer life-span than conventional light strings.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Cheung Tungfong
LandOfFree
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