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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2013.7
- 수록면
- 1 - 7 (7page)
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LED lamps are appropriate to the light source for use in broadcasting lighting. When the lighting frequency of LED lamp is different from the shutter frequency of camera, however, the flicker appears on the moving image which is taken by the camera under the dimmed light of LED lamp with conventional dimming methods. In this study, a new dimming method for the LED lamps used as the broadcasting lighting is proposed to minimize the flicker. A lighting period in the proposed dimming method is divided into the several sub-periods which have weight of the bits. Also, the proposed dimming method has characteristics that are optimizing the turn-on timings of two LED lamps to reduce the turn-off periods of the lamps and not to overlap the turn-on periods of the lamps. In the experiments, the incidence of the flicker is taken by the camera under several lighting conditions of the conventional dimming methods and the proposed dimming method. In addition, the brightness values of the frames are obtained in the moving image, and incidence of the flicker is evaluated and compared with conventional methods. From the results, the incidence of the flicker in the proposed method is more improved than the conventional methods.
목차
Abstract
1. 서론
2. 실험 장치의 구성 및 실험 방법
3. 실험 결과 및 검토
4. 결론
References
참고문헌 (8)
참고문헌 신청
1. [학술지(정기간행물)] - Nan Chen / 2011 / A Driving Technology for Retrofit LED Lamp for Fluorescent Lighting Fixtures With Electronic Ballasts / IEEE Transactions on Power Electronics 26 (2) : 588 ~ 601
3. [학술지(정기간행물)] - Huang-Jen Chiu / 2010 / A High-Efficiency Dimmable LED Driver for Low-Power Lighting Applications / IEEE Transactions on Industrial Electronics 57 (2) : 753 ~ 743
4. [학술지(정기간행물)] - Z. Vaitonis / 2012 / Effect of junction temperature oscillation on output characteristics of a light-emitting diode under pulse-width and pulsefrequency modulation driving methods / IET Optoelectron 6 : 52 ~ 56
5. [단행본] - Arturas Zukauskas / 2002 / Introduction to Solid-State Lighting / Wiley-Interscience Publication : 136 ~
6. [학술지(정기간행물)] - L. Svilainis / 2008 / LED brightness control for video display application / Displays 29 (5) : 506 ~ 511
3. [학술지(정기간행물)] - Huang-Jen Chiu / 2010 / A High-Efficiency Dimmable LED Driver for Low-Power Lighting Applications / IEEE Transactions on Industrial Electronics 57 (2) : 753 ~ 743
4. [학술지(정기간행물)] - Z. Vaitonis / 2012 / Effect of junction temperature oscillation on output characteristics of a light-emitting diode under pulse-width and pulsefrequency modulation driving methods / IET Optoelectron 6 : 52 ~ 56
5. [단행본] - Arturas Zukauskas / 2002 / Introduction to Solid-State Lighting / Wiley-Interscience Publication : 136 ~
6. [학술지(정기간행물)] - L. Svilainis / 2008 / LED brightness control for video display application / Displays 29 (5) : 506 ~ 511
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