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A New Current Balancing Methods of CCFL for LCD TV Backlight  

Lee, Soung-Ju (단암시스템즈(주))
Kim, Ho-Jin (단암시스템즈(주))
Lee, Hai-Don (단암시스템즈(주))
Mok, Hyung-Soo (건국대 전기공학과)
Choe, Gyu-Ha (건국대 전기공학과)
Yang, Seung-Uk (단암시스템즈(주))
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.11, no.4, 2006 , pp. 371-377 More about this Journal
Abstract
Cold cathode fluorescent lamps (CCFL) show complex characteristics, which make it difficult to drive them in parallel. In this paper, a multi-lamp driving scheme is proposed to drive multiple lamps for LCD back light to reduce output current unbalance. This propose system is composed of parallel CCFLs, series transformers. The driving system adopts only one backlight inverter to drive multi cold cathode fluorescent lamps (CCFL). Moreover the circuit introduces a multi-lamp driving transformer to reduce lamp-current imbalance. The validity of the proposed scheme is confirmed by the simulated and experimental results.
Keywords
CCFL Inverters; LCD Back Light Inverter; Multi-Connected CCFL;
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  • Reference
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