전력전자학회:학술대회논문집 (Proceedings of the KIPE Conference)
- 전력전자학회 2005년도 전력전자학술대회 논문집
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- Pages.325-328
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- 2005
Comparative Study on Sinusoidal and Square Wave Driving Methods of EEFL (External Electrode Fluorescent Lamp) for LCD TV Backlight
- Lee, Yeon-Jae (Department of Electrical Engineering and computer Science, Korea Advanced Institute of Science and Technology) ;
- Oh, Won-Sik (Department of Electrical Engineering and computer Science, Korea Advanced Institute of Science and Technology) ;
- Lee, Sung-Sae (Department of Electrical Engineering and computer Science, Korea Advanced Institute of Science and Technology) ;
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Moon, Gun-Woo
(Department of Electrical Engineering and computer Science, Korea Advanced Institute of Science and Technology)
- 발행 : 2005.07.04
초록
EEFLs are mostly driven by sinusoidal wave driving method although EEFLs (External Electrode Fluorescent Lamps) are driven by both sinusoidal wave and square wave. The sinusoidal driving method reduces the cost and allows more power efficiency since this driving method can reduce the voltage stress of EEFL inverter switches and achieve the soft switching of the switches. And a transformer should be used in the inverter since the high voltage should be applied to the both ends of EEFL to turn on the lamp. However, the power loss mainly occurs at the transformer in the sinusoidal wave driving method. In order to remove the transformer which makes the power loss, a new method is presented. In this paper, the square wave is applied directly to the both ends of EEFL by a proposed two-stage inverter. Moreover, the luminance and power efficiency will be compared between the common sinusoidal wave driving method and square wave driving method.
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