Abstract: The present invention provides a decorative light string that comprises one or more branch circuits, each of said more branch circuits is parallelly connected each other, and then connected to a common power supply wire for importing operational voltage; each said branch circuit comprises a plurality of light groups, and said plurality of light groups are serially connected in turn; each of said plurality of light groups comprises a first LED, and further comprises a protective diode parallelly connected with said first LED in a reverse direction. Said protective diode may be a rectifier diode, a zener diode, a switching diode or a second LED. In the present invention, the protective diode is parallelly connected with the first LED in the reverse direction via a welding manner and shares a pair of pins with the first LED. Further, the chip of the protective diode and the chip of the first LED may be installed into one housing to form an integrative component, thus the connecting wires are saved.

Abstract: The present invention provides a LED decorative light string that comprises one or more branch circuits, each of said more branch circuits is connected in parallel with each other, and then connected to a common power supply wire for importing operational voltage; each said branch circuit comprises a quantity of light groups, and said quantity of light groups are serially connected in turn; each said light group comprises two or more LEDs, wherein at least one LED is connected in parallel with other LEDs in reverse direction, said other LEDs are connected in parallel in the same direction. The LED decorative light string of the present invention has the advantage of more economical, more reliable in performance, longer life span.

Abstract: The present invention provides a LED decorative light string that comprises one or more branch circuits, each of said more branch circuits is connected in parallel with each other, and then connected to a common power supply wire for importing operational voltage; each said branch circuit comprises a quantity of light groups, and said quantity of light groups are serially connected in turn; each said light group comprises two or more LEDs, wherein at least one LED is connected in parallel with other LEDs in reverse direction, said other LEDs are connected in parallel in the same direction. The LED decorative light string of the present invention has the advantage of more economical, more reliable in performance, longer life span.