Patent ID: 9686828
Date: 2017-06-20
CPC Classifications: F21K,F21Y,H05B,Y02B

Claim:
1. A light-emitting diode retrofit lamp comprising: a plurality of pins that electrically connects a light-emitting diode lamp with a first terminal connection and a second terminal connection of a ballast; a bridge rectifier that converts an alternating current voltage generated by the ballast to a direct current voltage required for the light-emitting diode; a strike barrier placed between the plurality of pins and the bridge rectifier to prevent the flow of current to the bridge rectifier until a threshold voltage is reached, the strike barrier having a triode for alternating current (TRIAC) with main terminals connected to the first terminal connection of the ballast and the bridge rectifier and a gate terminal of the TRIAC is connected to an anode terminal of a Zener diode; wherein a cathode terminal of TRIAC is connected to a node between the second terminal connection of the ballast and the bridge rectifier; and the Zener diode placed in reverse orientation does not allow current to conduct to the gate terminal the triode for alternating current until the threshold voltage is reached.