LIGHT EMITTING DIODE LIGHTING DEVICE DRIVEN BY A UNIFORM ALTERNATING CURRENT

摘要

The invention is disclosed a lighting device using an alternating current to drive light emitting diodes (LEDs). The lighting device uses at least two parallel-connected LED modules. In front of each LED module has connected to a current balancing unit in series that has same capacitance or inductance. The LED module comprises a first polarity LED bar and a second polarity LED bar connected in parallel. The LED module receives an alternating current voltage from the current balancing unit, which alternatively drive the first polarity LED bar and the second polarity LED bar. The light device uses different impedances of the current balancing unit and the LED to provide smooth and uniform current to the LED module and achieves a stable luminance.