| 摘要 |
<p>The present invention provides a CCFL driving circuit having a parallel-arranged transformer (T1, T2) system and a feedback loop positioned to sense the current in one of the lamps (CCFL1) in the system. Each of the CCFL (CCFL1, CCFL2) in the system is driven by the secondary side of an individual transformer (T1, T2). Bas ed on the current sensed in the feedback loop, a controller (14) supplies the appropriate driving voltage to the primary side of the transformers (T1, T2), which in turn powers each of the CCFL (CCFL1, CCFL2). Since the primary sides of the transformers (T1, T2) are arranged in parallel, and since each of the CCFL (CCFL1, CCFL2) is connected at a common node (COM), it is ensured that each transformer (T1, T2) receives identical voltage, and the current in each CCFL (CCFL1, CCFL2) loop is balanced.</p> |
