Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2003.07b
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- Pages.1181-1183
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- 2003
The design of CCFL Driving Circuit by Resonant Invertor and Dimming IC
조도조절이 가능한 공진형 인버터 적용 CCFL 구동회로의 설계
- Kim, Cherl-Jin (Halla University) ;
- Ji, Jae-Geun (Halla University) ;
- Kim, Sung-Lae (Halla University) ;
- Yoon, Shin-Yong (Dongguk University)
- Published : 2003.07.21
Abstract
Cold cathode fluorescent lamp(CCFL) are widely used to illuminate the liquid crystal display(LCD). Usually, CCFL dimming methods are used to lamp current regulation or average current adjust feeding the CCFL inverter. Switching frequency of inverter is higher than resonant frequency at stabile states. In this study, design of CCFL driving circuit by half-bridge type series and parallel resonant inverter that variable frequency modulation method to control the output power. This method has advantages such as low EMI and reduced harmonics. And it is easy to dimming control use microprocessor. The validity of this study is confirmed from the simulation and experimental results.
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