DRIVING METHOD AND CONTROL METHOD OF HOT CATHODE FLUORESCENT LAMP, AND ESTIMATION METHOD OF TEMPERATURE OF FILAMENT IN HOT CATHODE FLUORESCENT LAMP

摘要

An estimation method of the temperature of the filaments in the hot cathode fluorescent lamp (HCPL) is cooperated with a driving circuit, which drives a filament so that the filament has a filament voltage and a filament current. The estimation method includes the steps of measuring the filament voltage and/or the filament current, calculating an equivalent resistance of the filament in accordance with the filament voltage and the filament current, and estimating the temperature of the filament in accordance with the equivalent resistance. A control method and a driviim method of the HCFL are also disclosed.