Design and implementation of six-phase PWM dimming control for backlight inverter

This paper proposes a novel dimming control scheme which possesses six-phase PWM dimming control for backlight inverter. We adopt six-phase PWM dimming control circuit to control the brightness of twelve lamps. Each phase can control two lamps. Circuit architecture is full bridge circuit which can improve the total efficiency of the driving circuit. Because six-phase PWM dimming inverters consume smaller input current than single-phase PWM dimming inverters at the same PDIM. So, it will cause that six-phase dimming presents smaller output Lamp currents and a better smooth curve than the conventional single phase dimming. From the experimental results, We verify the performance that the six-phase dimming control will be better than the conventional single phase dimming.