Title :
Driving cold cathode fluorescent lamps in parallel
Author :
Kim, C.G. ; Lee, Kuan-Chou ; Cho, B.H.
Author_Institution :
Interpower Co. Ltd., Seoul, South Korea
Abstract :
Cold cathode fluorescent lamps (CCFLs) show complex characteristics, which make it difficult to drive them in parallel. 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 CCFLs for 32-inch LCD TVs. Experimental results with eight CCFLs in parallel are also presented.
Keywords :
cold-cathode tubes; current distribution; fluorescent lamps; liquid crystal displays; television; 32 inch; 4 mm; 720 mm; LCD TV; cold cathode fluorescent lamps; current balancing condition; lamp current distribution; lamp voltage variation; parallel configuration;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20057641
