The　active　droplet　oscillation　is　a　method　previously　proposed　to　detach　the　droplet　at　currents　below　the　transition　current.　In　this　method,　a　droplet　oscillation　is　actively　excited　when　the　current　is　switched　from　the　exciting　peak　level　to　base　level.　The　downward　momentum　of　the　droplet　is　utilized　to　enhance　the　droplet　detachment.　In　this　work,　the　current　waveform　is　modified　to　achieve　stronger　droplet　oscillation　with　lower　average　current.　The　critical　change　is　to　separate　the　droplet　growing　and　exciting　processes　such　that　the　two　processes　can　be　controlled　independently.　The　heat　input　can　thus　be　reduced,　and　stronger　droplet　oscillation　is　obtained.　A　further　optimized　current　waveform　is　proposed　to　maximize　the　droplet　oscillation　energy　despite　the　growing　current　level.