Retrofit LED lighting device with improved timing event detection to improve stable driver operation without light flicker

摘要

A retrofit light emitting diode (LED) lighting device for connecting to a ballast, wherein the ballast is configured to supply a ballast current, and the retrofit LED lighting device is at least one for emitting light. A shunt of one LED, a ballast configured to rectify the ballast current and supply a lamp current to the at least one LED, and the at least one LED, thereby causing the lamp current to be at least one of the LEDs. It has a shunt switch for preventing flow through the LED and a control unit for controlling the shunt switch, and the control unit has the ballast current and the lamp current in one of the ballast current and the lamp current. Disclosed is a retrofit LED lighting device configured to detect a particular amplitude offset current level, which is a particular non-zero value of the ballast current or the lamp current, and is triggered by the detection to activate the shunt switch. ing.