DRIVING METHOD AND CONTROL METHOD OF HOT-CATHODE FLUORESCENT LAMP, AS WELL AS ESTIMATION METHOD OF FILAMENT TEMPERATURE

摘要

PROBLEM TO BE SOLVED: To provide an accurate estimation method of a temperature of a filament to be applied to a driving method and a control method of a hot cathode fluorescent lamp.;SOLUTION: The method for estimating the temperature of the filament in the hot-cathode fluorescent lamp is disclosed, which is cooperated with a driving circuit. The driving circuit drives a filament so as to bring about a filament voltage and a filament current to the filament. The estimation method includes 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 corresponding control method and a driving method of the hot-cathode fluorescent lamp are also disclosed.;COPYRIGHT: (C)2009,JPO&INPIT