RECYCLING OF BALLASTIC CIRCUIT TO FORM A NIGHT LAMP

This paper presents a single-stage high-frequency full-bridge electronic ballast circuit of a scrap CFL is reused for luminance LCD projector systems. The studied electronic ballast is found to have high conversion efficiency due to its single-stage circuit with zero-voltage switching features. A high-power factor can be achieved by using developed single-stage topology. The operation principles and design considerations are analyzed and discussed in detail. The night lamp circuit presented in this paper uses a serviceable electronic circuit enclosed in a base of 11-watt or 15-watt CFL.