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자료유형
학술저널
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전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.9 No.2
발행연도
2009.3
수록면
164 - 172 (9page)

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초록· 키워드

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Recently, 2-dimensional flat light sources have been attracting much attention for its use in LCD backlight applications because of its high luminous efficiency and uniformity. A long-gap discharge, mercury-free flat fluorescent lamp has been developed, which shows a high brightness (>5000 cd/㎡) and high luminous efficacy (60 lm/W). Additionally, it has a wide operating margin and stable driving condition with the aid of an auxiliary electrode. For driving the lamp, a narrow pulse power to maintain the glow discharge state is required. Since there has been no research for this kind of lamp driving, this paper proposes a newly developed short-pulse, high-voltage lamp-driving scheme. The proposed lamp system uses a ballast with a coupled-inductor in order to raise the short pulse voltage up to the lamp ignition level and to obtain energy-recovery action during the glow discharge mode. The operation principles are presented and also the system performances such as the lighting efficiency, spatial and angular uniformities are evaluated by hardware experiments. The results show that the proposed lighting system is a good candidate for the next-generation of LCD backlight systems.

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ABSTRACT
1. Introduction
2. Opto-Electronic Characteristics of Mercury-Free Flat Fluorescent Lamps
3. Operation Principles of the MFFL Backlighting System
4. System Efficiency
5. Luminance Uniformity
6. Viewing Angle
7. Conclusions
Acknowledgment
References

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