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정학근(Hak-Geun Jeong),정봉만(Bong-Man Jung),한수빈(Su-Bin Han),박석인(Suk-In Park),김규덕(Kyu-Deok Kim),유승원(Seong-Won Yu) 한국조명·전기설비학회 2004 한국조명·전기설비학회 학술대회논문집 Vol.2004 No.5월
Concerning Korean energy consumption 20% of the total electrical energy (96% is now exported) is consumed in lighting area. Accordingly, it is one of the most important governmental policies to efficiently utilize electricity due to development and application of high-efficiency lighting equipment. In Korea, widely-built traffic signals employ an incandescent and are of 100W/300 mm and 280,080set/801,932 1amps have been installed and operated by 1999. Of them, 58%(161,181set), 25%(69,655set) and 18%(49,244set) correspond to traffic signals, pedestrian signals and other supplementary signals respectively. It was estimated that electrical energy consumed 28MW instantaneously, 245GWH annually. On the other hand, the LED traffic signal is expected to be a future traffic signal since if traffic signals are replaced by LEDs, energy saving effect of 85% and drop of 75% in maintenance fee will be obtained. In this paper, the performance and characteristics of many LED traffic signals made in Korea are summarized in order to reform Korean standard of LED traffic signals.
LED 광원에 적합한 새로운 구조의 반사경의 설계 및 제작
정학근(Hak-Geun Jeong),정봉만(Bong-Man Jung),한수빈(Su-Bin Han),박석인(Sukin Park),김규덕(Kyu-Deok Kim) 한국조명·전기설비학회 2006 한국조명·전기설비학회 학술대회논문집 Vol.2006 No.5월
A few ten mW white LED can substitute for the indicator light source, and it is required to study several watt multi-chip semiconductor light sources in order to replace the light sources for general illumination such as incandescent lights and fluorescent lamps. Since the optical technology used for several mW white LED light source uses only 30% to 50% of the light, it is required to develop the design technology of optical system and lens to improve the efficiency more than 80% for insuring the high power of white LED. In this paper, we designed and fabricated new structure reflector to increase the efficiency and is easy to make high power multi-chip LED lamp.
정학근(Hak-Geun Jeong),정봉만(Bong-Man Jung),한수빈(Soo-Bin Han),송유진(Yu-Jin Song),박석인(Sukin Park),김규덕(Kyu-Deok Kim),유승원(Seung-Won Yu) 한국에너지기후변화학회 2008 에너지기후변화학회지 Vol.3 No.1
Since a LED light source does not include the mercury(Hg) or a filament, it is expected as an environmentally friendly next generation Light source with its good reliability and long lifetime. A few ten mW white LED can substitute for the indicator light source, and it is required to study several watt multi-chip semiconductor light sources in order to replace the light sources for general illumination such as incandescent lights and fluorescent lamps. The light sources for illumination have a variety of applications in the indoor and outdoor, and the variation of optical power and color rendition of the light source limits their applications. Therefore, it is necessary to research the LED lamp and its luminaire to minimize the variation of dynamic characteristics due to that illuminating environment.