Alternating Current Light Emitting Diode Lighting Technology with Improved Light Flicker

Abstract

In this study, we attempted to improve light flickering in an alternating current light emitting diode light. Percent flicker in an incandescent lamp is 6-14% and that in a magnetically ballasted fluorescent lamp is 25-40%. The percent flicker of an incandescent lamp can be achieved in an alternating current light emitting diode light by emitting light before 40 degree in each voltage phase of three-phase alternating current power. However, this percent flicker cannot be realized by placing the light emitting diode lamp in two phases of the three-phase alternating current power. Percent flicker of a magnetically ballasted fluorescent lamp can be realized if light is emitted before 10 degree in the voltage phase for each phase by placing the light emitting diode lamp in two phases of the three-phase alternating current power.