• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.18 no.3
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• pp.55-58
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• 2004

Recently the examples of a lighting design with LED source have increased rapidly, but there are few researches that are related to selecting luminous colors by LED. The research is that respondents operated color blender and got preference colors according to what they made, the colors were measured by chroma meter and marking CIE 1931 chromaticity diagram. Through the results of the research has made group preference for luminous colors. From now on, not only does it seem capable of using a designing a building-lighting to which LED but it will be actively applied to controlling with a digital technology for lighting design.

• The Optical Journal
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• s.123
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• pp.22-25
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• 2009

III-V족 화합물반도체 태양전지중 다접합 구조 태양전지와 집광형 태양전지는 제 3세대 태양전지로서 주목받고 있다. 현재 가장 간단하고 저렴한 원가를 갖는 구조가 프레넬 렌즈 1장을 사용한 구조로서 현재의 광학시설과 인프라만으로도 많은 부분을 개선할 수 있을 것이라 확신한다. 렌즈를 활용하여 집광한 빛을 한곳으로 모으로 이를 셀에 균일한 강도로 손실 없이 전송하기 위한 기하광학적 설계기술이 필요하며 이러한 설계와 조명설계를 결합하여 광시스템을 구축하는 것이 무엇보다 중요하다. 현재 나라마다의 다양하고 적극적인 개발노력으로 인하여 수년 안에 기존보다도 훨씬 효율성 높고 실용적인 태양집광시스템이 개발되리라 기대한다.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2008.05a
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• pp.196-198
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• 2008

본 논문에서는 LED의 고출력화가 이루어지면서 많이 사용되고 있는 LED MR 타입과 PAR 타입의 램프 배광을 설계하였다. 1W와 5W급의 High power LED를 적용하였고, 1개의 LED가 사용된 빔각 30도의 MR16 램프부터 9개의 LED가 사용된 빔각 60도의 PAR30 램프까지 총 6가지 배광을 구현하고 최대광도로 각각의 성능을 평가하였다. 빔 각을 구현하고 집광시키기 위하여 LED dome 측면부에 소형의 반사판을 설계하였다.

• Korean Journal of Optics and Photonics
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• v.32 no.2
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• pp.68-78
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• 2021

A subminiature catadioptric omnidirectional optical system (SCOOS) with 2 mirrors, 6 plastic aspherical lenses, and an illumination system of 6 light emitting diodes, to observe the 360° panoramic image of the inner intestine, is optically designed and evaluated for a capsule endoscope. The total length, overall length, half field of view (HFOV), and F-number of the SCOOS are 14.3 mm, 8.93 mm, 51°~120°, and 3.5, respectively. The optical system has a complementary metal-oxide-semiconductor sensor with 0.1 megapixels, and an illumination system of 6 light-emitting diodes (LEDs) with 0.25 lm to illuminate on the 360° side view of the intestine along the optical axis. As a result, the spatial frequency at the modulation transfer function (MTF) of 0.3, the depth of focus, and the cumulative probability of tolerance at the Nyquist frequency of 44 lp/mm and MTF of 0.3 of the optimized optical system are obtained as 130 lp/mm, -0.097 mm to +0.076 mm, and 90.5%, respectively. Additionally, the simulated illuminance of the LED illumination system at the inner surface of the intestine within HFOV, at a distance of 15.0 mm from the optical axis, is from a minimum of 315 lx to a maximum of 725 lx, which is a sufficient illumination and visibility.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.11 no.3
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• pp.97-105
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• 1997

The aim of this paper is to introduce a design technique of the Two-Degree-of-Freedom(TDF) satellite-tracking control system which has not only the robust stability for a unstructured uncertainty but also the robust performance for a structured uncertainty. This TDF system which can design the feedforward controller KI and the feedback one K independently is designed by , $\mu$-synthesis. The effectiveness of this TDF system is verified and compared with the One-Degree-of -Freedom(ODF) satellitetracking control system by computer simulation.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2000.11a
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• pp.41-46
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• 2000

조명시스템의 경제성에 크게 영향을 주는 요소들을 보면 초기 설비비, 보수비, 전기요금 등이 있다. 이 중에서 보수비는 램프 교환비, 램프교환 인건비, 청소비로 구성되어 있으므로 보수계획에 따라서 조명시스템의 경제성이 다르게 나타난다. 따라서 설계초기에 어떠한 조명시스템이 경제적으로 유리한가를 예측하는 것은 중요하다. 그러므로 본 연구에서는 국내에서 평균조도를 계산하는데 사용되는 ZCM에서의 보수율 구성 요소들을 변화시켜 보수율 값을 산정한 후 조명시스템의 경제성 평가 위해 개발한 WEELS(Worksheet for Economics Evaluation of Lighting Systems)에 적용하여 조명시스템에서 보수율의 중요성을 보였다.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.8 no.1
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• pp.21-28
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• 1994

It is very important and necessary to predict luminous enviroment in an interior space. This paper has described about energy saving and evaluated interior visual environment in a office building having on/off turning control lighting system utilizing daylight. In order to predict the interior varior illumination distribution, the scale model was made and examined under various conditions, such ad difference of window glass, and color pattern of wall, floor, and also ceiling lighting system type. This paper suggests that basic fundamental data of lighting design performance in the concept and schematic stages of design.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.219-220
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• 2010

This paper presents the development of LED lighting device monitoring system, Brightness control for LED lighting and Installation of lighting equipment to collect environmental data Intelligent LED lighting control system is presented.

• 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 Korea Information Processing Society Conference
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• 2017.04a
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• pp.138-139
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• 2017

세계적으로 에너지 과다 사용으로 인한 비상사태가 발생하면서 에너지 절감, 그린 에너지에 대한 관심이 증가하고 있다. 특히 블루투스 기반의 네트워크 구성을 통해 중앙 조명 제어가 이루어지고 있다. 그러나 블루투스는 저전력 기술 중 높은 전력을 소모하기 때문에 조명기기가 증가할수록 전력사용량이 증가하기 때문에 저전력을 유지하기 어렵다는 문제점이 있다. 따라서 본 논문에서는 Zigbee 기술을 기반으로 조명기기를 제어할 수 있는 시스템을 설계하였다.