대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2004년도 하계학술대회 논문집 B
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- Pages.1211-1213
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- 2004
LCD 조광용 냉음극 형광램프의 구동 및 제어
The Drive and Control Circuit Design of Cold Cathode Fluorescent Lamp for LCD Back Lighting
- Kim Cherl-Jin (Halla University) ;
- Hong Dae-Shik (Halla University) ;
- Hwang Yo-Han (Halla University) ;
- Yoon Shin-Yong (Dongguk University)
- 발행 : 2004.07.14
초록
CCFL(cold cathode fluorescent lamp) are used to backlight of LCD(liquid crystal display). CCFL dimming methods are used to pulse frequency modulation(PFM) or pulse width modulation(PWM). In this paper, design of CCFL driving and control circuit by half-bridge type series and parallel resonant inverter that variable frequency modulation method to control the output voltage current. Inverter switching frequency is higher than resonant frequency for stable operating, and it is possible dimming control. On the basis of equivalent circuit, the validity of this study is confirmed by the comparison of simulation and experimental result.
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