Patent ID: 8007129
Filing Date: 2011-08-30
Classification: F21S,F21Y,H05B

Abstract:
1. A LED-based Christmas light string assembly with parallel-wired lighting units, the assembly comprising: a plug receiving an AC voltage, converting the AC voltage to a low DC voltage and connected with an extension wire, a DC voltage output wire and a ground wire, wherein the extension wire and the DC voltage output wire transmit the low DC voltage; an extension socket connected to the extension wire and the ground wire; a light string being connected between the plug and the extension socket, and comprising multiple lighting units connected in parallel, each lighting unit having an LED Christmas bulb and a resistor connected in series, each resistor limiting a current flowing through the corresponding LED Christmas bulb and preventing a short circuit between the DC voltage output wire and the ground wire when the corresponding LED Christmas bulb becomes short circuit.