CCFL is Cold Cathode Fluorescent Lamp. The term cold cathode refers to the fact that the cathode is not independently heated, but may still operate at elevated temperature. The interior surface of cold cathodes are capable of producing secondary electrons at a ratio greater than unity upon electron and ion impact. CCFL was firstly used as back lighting of the TFT-LCD displays in 1980s, and later on copiers, scanners, notebook PC, LCD monitor and TV. Now, The application of CCFL has been moving to general lighting