| Ficha completa |
| Título: | Low Frequency Architecture for Multi-Lamp CCFL Systems with Capacitive Ignition |
| Tipo: | Publicacion en Proceedings o Actas internacionales |
| Lugar: | IEEE Applied Power Electronics Conference and Exhibition. Austin-Texas. USA |
| Fecha: | 2005-03 |
| Autores: |
Montu Doshi
Jianjian Bian
Regan Zane
Francisco J. Azcondo
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| Líneas: |
Diseño de circuitos electrónicos de aplicación industrial
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| Proyectos: |
Sistemas de alimentación para lámparas de descarga y equipos de electroer...
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| ISBN: | 0-7803-8975-X |
| Fichero: |
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| Resumen: | This papers presents a low frequency architecture for driving parallel cold cathode fluorescent lamps (CCFLs) in large screen LCD TV backlighting applications. Key to the architecture is a proposed capacitive coupling approach for the ac lamp ignition. Te ystem consist of a single high voltage converter, an ac lamp ignition circuit, current regulation devices and a single primary controller. The topology is capable of driving an arbitrary number of parallel lamps with independent accurate lamp current regulation, while maintaining high efficiency and achieving significant size, weight, and cost reduction when compared to typical high frequency ac ballast design. Experimental results for a pair of parallel 800V 40cm CCFLs demonstrate simultaneous ignition and dc current regulation. |
