Title :
Uniform Current Distribution in Driving Cold Cathode Fluorescent Lamps (CCFL) in Parallel
Author :
Kim, Chang-Gyun ; Lee, Kyu-Chan ; Cho, Bo H.
Author_Institution :
Interpower Co. Ltd., Seoul
Abstract :
Cold cathode fluorescent lamps (CCFL) show complex characteristics, which make it difficult to drive them in parallel. In this paper, analysis of the lamp current distribution in parallel operation is presented in detail. The current balancing condition, under which the lamp currents are well balanced in the presence of the lamp voltage variation, is derived. The analysis results are verified from experiments with two 720 mm/4 mm CCFL´s for 32-inch LCD TVs. Experimental results with eight CCFL´s in parallel are also presented
Keywords :
cathodes; current distribution; fluorescent lamps; liquid crystal displays; television; 32 inch; 40 mm; 720 mm; LCD TV; cold cathode fluorescent lamps; current balancing condition; lamp current distribution; lamp voltage variation; uniform current distribution; Cathodes; Computer displays; Current distribution; Flat panel displays; Fluorescent lamps; Impedance; Inverters; Liquid crystal displays; TV; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 2005. PESC '05. IEEE 36th
Conference_Location :
Recife
Print_ISBN :
0-7803-9033-4
DOI :
10.1109/PESC.2005.1581764
