• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.05e
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• pp.100-103
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• 2003

고휘도 LED(light emitting diode) 빨강(R), 녹색(G), 파랑(B), 호박색(A), 백색(W) 등의 중요한 광학특성인 광속(luminous flux), 효율(luminous efficacy), 피크 파장(peak wavelength), 가중치 평균 파장(weighted average wavelength), 반치폭 (full width at ha1f maximum), 색도좌표(chromaticity coordinate), 주 파장(dominant wavelength), 자극순도 (excitation purity) 와 휘도순도(colorimetric purity)에 대해서 비교검토하였다. 시험결과로 제시된 LED의 기본적인 특성 데이터는 추후, 새로운 조명용 LED 램프나 등기구(luminaire)를 개발 및 특성연구에 많은 도움을 줄 것으로 사료된다.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2002.11a
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• pp.59-64
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• 2002

배광분포를 측정함으로서 조명기구의 모든 광학적 특성을 계산해낼 수 있으며 이를 바탕으로 조명설계를 수행할 수 있는데, 이러한 일련의 측정과 해석을 위해 배광측정기의 개발시에 소프트웨어 개발이 동시에 이루어져야 한다. 연구진이 현재 개발하고 있는 소프트웨어는 조명기구의 광학적 특성을 파악하는 데 있어, 상당히 유용한 것들이다. 또한, 조명설계에 있어 근본적인 문제 해결의 과학적 검증을 제공함은 물론, 더 나아가 조명계산에 있어 하나의 표준을 마련하는 데 기여할 수 있을 것으로 보인다.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2004.11a
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• pp.137-140
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• 2004

광촉매의 성능을 평가하기 위해 3종류의 광촉매를 형광등 터널등기구, 고압나트륨 터널등기구, 고압나트륨 가로등기구에 코팅하고 이들 조명기구의 신설 시와 설치 1.5개월 후의 투과율을 측정하여 그 성능을 평가하였다. 그 결과 고압나트륨 터널등기구에는 광촉매 반응이 거의 일어나지 않았고, 형광등 터널등기구에서만 그 효과가 나타났다. 이것은 고압나트륨등이 자외선 영역에서 빛을 거의 방출하지 않았기 때문이다.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2004.11a
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• pp.73-77
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• 2004

Outdoor space used for leisure life as inhabitantses' recreation and rest area, and night activity is very important space to many apartment complex. Lately, outdoor space is recognized as a very important space in apartment complex. Especially, that outdoor space is frequently used at night despite planning of lighting of current outdoor space is unprepared for the selection of suitable luminaires, arrangement of luminaire and lighting plan. From this point of view, this paper investigated the essence of light in outdoor space and analyzed different outdoor luminous environment. This paper finally suggested recommended level of illuminance and planning of lighting.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2009.10a
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• pp.201-203
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• 2009

RGBY LED PKG를 이용하여 무대 사용을 위한 100W 급 LED 조명기구를 설계하고 무대에 적용하였을 때의 조명 환경을 예측, 분석 하였다. 이를 위하여 색온도 및 광색가변에 적합한 4 in 1 LED Package를 선정하고, 이를 이용하여 광원모듈을 구성하였으며, 또한 무대조명에 적용하기 위한 렌즈를 제작하였다. 이러한 LED 조명기구를 또한 무대조명에 적용하여 조명상황을 시뮬레이션 하고 무대 또는 객석에서의 평균조도 및 조도균제도 등을 계산하였다.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2009.10a
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• pp.15-18
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• 2009

Photopia, LightTools, and ASAP are typical software for optical design of a luminaire. Through using various lighting simulation software some different results can be found under the same conditions. Therefore, the purpose of this paper is to compare simulated photometric data and values illuminance of different types of LED prism luminaires under the same conditions. Then, LED prism luminaires were divided into the linear type and the planar type. Also three kinds of prism angles were divided into $30^{\circ}$, $45^{\circ}$, and $60^{\circ}$. In addition, the reasons for such differences were analyzed.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2009.10a
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• pp.99-102
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• 2009

Fixture 일체형 LED 다운라이트(Downlight)의 광 효율 향상을 위하여 LED 장착위치 및 Reflector 길이, 히트싱크(Heat sink) 형태에 따른 광도(luminous intensity)와 기구효율(luminaire efficiency)을 시뮬레이션을 통하여 비교분석 하였다. 또한 히트싱크의 방열 설계를 시뮬레이션 하고 상용 LED 패키지 (Cree, XP-E P4)를 사용하여 시제품을 제작 하여 그 성능을 평가하였다. 그 결과 광속 9661m, 상관 색온도(CCT) 3,060K, 연색지수(CRI) 82의 광 특성을 갖는 LED 다운라이트를 개발하였다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.29 no.3
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• pp.30-38
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• 2015

As products using LEDs are developed actively, also there has been large request for LED products that can replace traditional lamps like fluorescent lamps and metal halide lamps. But so far there is no proper standard that manufacturer can use and test it. As a result manufacturer can't develop retrofit LED lamps and sell it even they have technology. In this study, by analyzing control gear for fluorescent lamp that is currently used in market which is magnetic or electronic ballast, I'd like to develop proper test method by investigating compatibility between all-type control gear and LED retrofit products.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2002.11a
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• pp.239-242
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• 2002

With existing illumination rendering system being used in domestic, internationally developed common programs are taking over the market more than 90%. However, since the programs are established with DB designed to be most suitable for their own products, accuracy in analysis and visualized image are hardly reliable. This raises the necessities of establishing DB for domestic developed products. A method of establishing artificial luminair DB, which was studied on DB establishment in consideration of optical characteristics of domestic products with using RADIANCE program was presented in this study, and it is considered as the program of simulating light movement most accurately among all rendering programs developed so far.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.25 no.1
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• pp.9-17
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• 2011

Development of high efficiency and eco-friendly LED source has been progressed continuously. Also, by nation's regulations, public institutions have changed existing luminaires to LED luminaires. However, there are several differences between existing luminaires and the intensity distribution of general planar LED luminaires. In case of changing existing luminaires to LED luminaires, by such differences, there are inefficiencies both quality aspect and energy aspect in luminous environment. Therefore, this study aims to conduct a study on the changes of intensity distribution and luminous environment by reflector shapes in indirect reflected LED luminaires with software for optical design of a luminaire (Photopia 2.0) and lighting design of a space (ReluxPro). This study shows the changes of intensity distribution and luminous environment of indirect reflected LED luminaires and indirect fluorescent lamp luminaires by reflector shapes.