• 조명전기설비학회논문지
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• 제27권8호
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• pp.1-8
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• 2013

The study carried out in this dissertation focuses on the lens structure design and the light distribution for LED safety luminaires using COB type LED module. Lens structures for LED lights has been designed 1) to induce light diffusion by dual process of internal reflection and refraction, 2) to minimize the inherent LED lights' glittering, and 3) to have uniform brightness. The lens designed with the proposed structures function as diffusers for the divergence of the LED lights so that they form a wide angle of view and adjust the light distribution. We designed of lens with stable uniformity factor and average roughness using aspheric optics property. Finally we made the analysis data of the simulated data.

• 조명전기설비학회논문지
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• 제22권1호
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• pp.7-16
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• 2008

주유소 조명은 안전하고 시각적으로 흥미롭게 디자인되어야 한다. 최근 연구에는 빛공해와 에너지 낭비 때문에 non-cutoff 조명기구를 주유소에 이용되면 안 되는 것을 보여주었다. 본 연구에서는 non-cutoff 조명기구를 사용한 주유소의 조명환경을 분석하는 것을 목적으로 한다. CS-100 휘도계와 Radiant Imaging Prometric-1400을 이용하여 건물표면, 캐노피, 천정, 기둥 및 바닥면을 측정하였다. 그 결과 캐노피 조명기구의 개수가 증가할수록 건물전체 표면휘도가 증가하였으며, Non-cutoff 조명기구를 설치한 연구대상 전체 주유소는 빛공해를 유발하였다. 따라서 주유소 옥외조명에 대한 기준이 마련되어야 할 것이다.

• Journal of Advanced Marine Engineering and Technology
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• 제35권5호
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• pp.654-660
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• 2011

본 논문에서는 함정용 노출 방수형 형광등기구 대체를 위한 LED 조명기구의 설계방안에 대하여 연구하였다. 조명기구에 대한 한국산업규격(KS), 국방규격(KDS) 및 미국방규격(MIL)의 안전 및 성능 요구사항을 비교하였다. LED 등기구의 설계기준을 도출하기 위하여 기존 형광등기구의 소비전력, 총광량 및 배광 등 전기 광학적 특성을 실험적으로 분석하였다. 기존 조명기구의 성능을 기초하여 4가지 LED 조명기구를 시제작하였다. 기존 형광등에 비해 소비전력은 44~51 [%] 절감되고, 총광속은 8~13 [%] 증가하는 함정용 LED 조명기구의 설계방안을 제시하였다.

• 한국전기전자재료학회논문지
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• 제23권6호
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• pp.471-476
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• 2010

This paper has studied dissymmetrical light distribution design using the secondary optics in the simulation. fundamental Lambertian radiation distribution based on LED has been cut off by the secondary optics, and the first surface slope of lens and second surface slope of total reflection area have been calculated through formula. PMMA (the index of refraction: 1.49361) which is material of lens has been selected. critical angle($42.02993^{\circ}$) between Air and PMMA has been calulated by snell's law, and total reflection angle slope has been selected about $16.67^{\circ}$ to occur the total reflection. when the first surface slope and the second surface slope has been set up, Rays of all total reflection area have generated the total reflection. finally, designed LED Module has been estimated by Korean Industrial Standards for LED safety street lighting. dissymmetrical light distribution have been analyzed with reached effect of road illuminance, and average road illuminance which are each 70.6 lx, 40.35 lx, and 25.88 lx have been satisfied with Korean Industrial Standards for LED safety street lighting.

• 한국구조물진단유지관리공학회 논문집
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• 제16권6호
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• pp.45-55
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• 2012

가로등은 도로이용자가 안전하게 통행하기 위한 도로의 필수 시설물이지만 가로등은 도로의 부속 전기장치로 취급되어 왔다. 이러한 잘못된 인식 때문에 풍하중과 이에 대한 구조거동에 대한 연구들이 부족하여 풍하중에 충분한 안전성을 확보하지 못함에 따라 태풍 시 많은 가로등이 전도 또는 파손되는 실정이다. 본 연구에서는 가로등 안전성을 기반으로 한 기존의 설계기준을 비교 검토하여 가로등주의 설치 여건에 적합한 개선된 설계기준을 제시하였으며, 이를 바탕으로 전도의 원인이 되는 점검구의 응력집중 현상을 분석하고 응력 저감 방안을 검토하였다.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2009년도 추계학술대회 논문집
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• pp.137-140
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• 2009

본 논문에서는 반사판을 이용하여 LED 보안등기구의 배광을 제어하였다. 먼저, 광학 설계를 용이하게 하기 위하여 집적화된 LED 모듈의 적정 배열을 도출한 후 반사판 설계를 하였으며, 광학 성능 예측 프로그램을 이용하여 결과물의 성능을 확인하였다.

• 대한안전경영과학회지
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• 제15권3호
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• pp.93-103
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• 2013

In recently, a growing concern for the health of urban residents increased interests in a variety of outdoor activities simply be done in terms of cost and time. They are specially interested in low-impact and safe exercises around residential or working area. Walking is the one of easily doing exercise in daytime or nighttime near residential area. The sidewalks of boulevard near the residential area is the best place for exercise because of easy access and the green space with roadside trees. However, if the nighttime is not guaranteed the proper lighting condition, the possibility of exposure to crime and the threat to pedestrian safety can be increased. Because roadside trees are one of the potential obstacle for lighting condition, supplementary lightings are important to mitigate interruption for safety. To meet such a need, the purpose of this study is to propose a simulation approach which improves lighting condition on sidewalks of boulevard with variety of roadside trees. To do so, the simulation approach is applied for analyzing the interrupted condition by classified five standard types of roadside trees considering the growth of them and finding optimal layout of supplementary luminaires by lighting types. The results of this approach shows that it is useful for assessing the safety of pedestrian in nighttime.

• Transactions on Electrical and Electronic Materials
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• 제11권3호
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• pp.138-144
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• 2010

Optical analysis is necessary to optimize light emitting diode (LED) safety street lighting. In this study, optical analysis was conducted for 100 W LED safety street lighting. Experimental research on such a single LED was the first undertaken. Simulation modeling based on the optical properties of the single LED has compared between average road illuminances and has them analyzed with Korean Industrial Standards for LED safety street lighting (KS C7658:2009). The simulation results demonstrated that the illumination performance (average road illuminance) was 75.3 lx at a height of 4 m and an area of $32\;m^2$, 45.25 lx at a height of 5 m and an area of $72\;m^2$, and 30.05 lx at a height of 6 m and an area of $128\;m^2$. 100 W safety street lighting (model CE180-ST-OS) designed by simulation was also compared between product and 100 W simulation modeling, and error rates averaged 5.6%. The 100 W LED safety street lighting base designed in simulation modeling was proven by comparison experiments. Through the simulations and the corresponding analysis, it was found that the tested 100 W LED safety street lamp had reasonable performance. The design method for LED safety street lamps has been summarized based on the optical analysis.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2011년도 전기공동학술대회 논문집
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• pp.182-182
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• 2011

This paper dealt with a design guide of LED luminaire standard for naval vessels. Several standards such as Korean Industrial Standard (KS), Korea Defence Standard (KDS) and US Military Standard (MIL) were compared in terms of safety and performance of lighting fixtures. The electrical and optical characteristics of the FL fixtures were experimentally analyzed to acquire design rules for LED luminaires. Based on the study results, we proposed the concept of a LED luminaire standard.

• 한국전기전자재료학회논문지
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• 제29권11호
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• pp.729-735
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• 2016

It is highly important issue to use an energy efficiently for sustainable prosperity of mankind. From this point of view, using LED lighting can be a good alternative because it has a lot of advantages such as high efficiency, long life time and eco-friendly manufacturing process. That is the reason why using LED lighting has been encouraged worldwide. However, in situations that LED lighting is replacing traditional lighting quickly, the problem of the flicker of LED lighting has emerged as an important issue. Therefore, in foreign countries like US or Japan in order to ensure the reliability of LED lighting, study for flickering effects of the human body and test methods are have been actively conducted. But related research in domestic situation is an insufficient condition. In this study, a flicker characteristic was measured conventional lamps such as incandescent lamps or fluorescent lamp and 81 items of LED lightings which are distributed in domestic markets.