Digital dimmable controller in CCFL module based on variable frequency technique

A novel simple control method to improve the ignition behavior of cold cathode fluorescent lamp (CCFL) in digital-dimming mode is proposed in this paper. To extend the lamp life, we designed a digital-dimming controller (DDC) in cold cathode fluorescent lamp based on variable frequency technique. The design was simulated by Cadence Spectre. It is effective to eliminate the ignition current spike and reduce the high ignition voltage.