• 조명전기설비학회논문지
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• 제29권4호
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• pp.30-36
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• 2015

The principle of an illumination and projection system including LED light sources for a spot type stage lighting system was presented, and its optical system was designed with optimizing parameters by the analytical methods. A dichroic mirror incorporated with an illumination system to optimizing LED source positions and to obtain the compact system. The projection system was optimized with specific constraints such as a chromatic aberration, distortion aberration and angle of incidence angles. Optimized design system has a beam angle from $10^{\circ}$ to $45^{\circ}$, and its illuminance was 4,500lux at distance of 6m on the work plane.

• 한국실내디자인학회논문집
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• 제17호
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• pp.128-135
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• 1998

The first issue was concerning the subject to provide students with an understanding of the principle of light its concept mental factors etc and with the observation and analysis of the light of an object and its form which is the process for designers to be able to deal with the deeper design concept by complementing the setting of necessary concept. The second issue was concerning the process of basic learning about basic electricity and lighting that lighting designers or interior decoration and architecture designer should have such as the introduction of light in kind of light source lighting system and so forth. The third issue was focused on practical affairs such as design and expression techniques the calculation of illumination using the computer simulation and so on. In addition such issues as the history of lighting photograph and its linkage with the field of engineering about new material ware addressed.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2005년도 학술대회 논문집
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• pp.147-150
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• 2005

Fixed lighting of public ways for both vehicles and pedestrians can create a nighttime environment in which people see comfortably and can quickly and accurately identify objects on the roadway being travelled roadway lighting can improve traffic safety, achieve efficient traffic movement and promote the general use of the facility during darkness. The design of a roadway lighting system involves consideration of visibility, economics, esthetics, safety and environmental conditions. This paper describe estimation of horizontal illuminance by actual measurement at main streets in Jejusi. We try to evaluate Jejusi Roadway Lighting Conditions for modeling by computer simulation.

• 산업공학
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• 제14권2호
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• pp.205-209
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• 2001

The number of tunnel has fast increased with the rapid expansion of highway network. Tunnel should be designed to provide for drivers both safety and pleasant driving conditions. In this perspective, the design for tunnel lightning is very important in order to provide its safety, pleasantness, and cost-efficienty of maintenance, all of which should be considered and analyzed for a better tunnel lighting. This paper attempts to compare the low-pressure sodium lamp, which has usually been used for tunnel lighting, with the fluorescent lamp, which we consider as an alternative for the former. In an effort to determine the number of lamps to meet the required illuminance in the tunnel, this research employs a simulation technique which would allow us to conjecture, with the aid of basic model, the life cycle cost for illumination per each tunnel. This analysis is expected to provide a basic method and related information for tunnel development and design.

• 조명전기설비학회논문지
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• 제29권11호
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• pp.1-5
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• 2015

In this paper, we propose the optical system design for a medium sized LED marine lanterns which simplifies the multi-layer structure into a single structure. In order to satisfy the target fixed intensity(35,000cd) and vertical divergence($-2.5^{\circ}{\sim}-4.0^{\circ}$, $+2.5^{\circ}{\sim}+4.0^{\circ}$), we use the total internal reflection collimator lens. And a Monte Carlo simulation has been utilized to optimize a condition of a LED package, TIR lens and outside lens. The computer simulation results indicated that this LED marine lanterns can produce of a fixed intensity(35,382cd) and vertical divergence($-3.1^{\circ}{\sim}+2.5^{\circ}$). Using the this optical system, we achieve the target value of LED lanterns.

• Journal of the Optical Society of Korea
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• 제17권5호
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• pp.376-383
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• 2013

The design of the LEDs lighting in general household illumination was proposed and compared with the fluorescent lighting in this study. Using the LED as a light source would promote energy saving lighting for household illumination purposes. We used the LightTools and DIALux software to design and simulate different standards of illuminance, different correlated color temperatures and different color rendering indices for household environments. The power consumption and efficiency of traditional illuminated light sources and an LED light source with the same standard of illuminance for lighting the household environment were analyzed and compared with each other. Finally, our results show the advantages of using white-light LEDs for lighting and household illumination.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 B
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• pp.1126-1128
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• 2002

In proportion to the development of various cultural contents industry, although the lighting tools with advanced control system are needed, the fields of the lighting tools are not competitive in techniques because they are limited in small businesses and have been lost their markets to foreign companies in the high value added industry. Accordingly, the technique that is better than current lighting tools is needed urgently. So, for the new lighting tools, this paper presents a new dimming method using IGBT(Insulated Gate Bipolar Transistor) devices. There are three procedures in this study. For the first, the authors verify superiority of IGBT Dimmer with simulation using EMTDC in former step for development of IGBT dimmer. Secondly, the authors made IGBT dimmer directly with the basis of simulation results. For the last, the efficiency, the Total Harmonic Distortion(THD) current, temperature characteristic, noise characteristic, voltage drop, heat losses between the IGBT dimmer and the Thyristor dimmer that is being used popularly in the industries the stages, and the theaters were tested and compared..

• 한국광학회지
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• 제28권6호
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• pp.273-280
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• 2017

본 논문에서는 낮은 도로 조명을 위한 freeform reflector를 설계하였다. 높이에 비해 넓은 차선까지 배광을 보내야 하는 낮은 도로 조명의 경우, 기존의 등주식 도로 조명에 비해 균제도를 맞추기 힘들다는 단점이 있다. 조명 등급 M3를 만족시키기 위해 reflector를 part 9개로 나누어 part 별 반사면의 기울기를 변화시켜 원하는 배광을 갖도록 하였고, 각 점을 기준으로 fitted curve를 그려 이에 따른 수식을 도출하였다. LightTools의 street light simulation을 통해 M3 조명 등급에 만족하는 것을 확인하였고 직접 제작하여 실제 도로상에서 조명 등급을 만족시키며 설계 결과에 대한 타당성을 입증하였다.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2007년도 춘계학술대회 논문집
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• pp.92-96
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• 2007

Architecture design has need of daylight prediction to utilize daylight efficiently. But it is difficult to predict the exact value of available daylight in buildings. Using various lighting simulation software is not difficulty, but we can find different results under the same conditions. The purpose of this paper is to compare simulation values from various software such as Lumen-micro 2000, Lightscape 3.2, and Relux 2006. The same space and parameters of daylight(location of space and window, date, time, and skylight condition) are considered to conduct various simulation conditions.

• ETRI Journal
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• 제35권4호
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• pp.559-565
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• 2013

In this work, we develop a simulation method to predict a two-dimensional luminance distribution method using a circuitry simulation. Based on the simulation results, we successfully fabricate large area ($90mm{\times}90mm$) transparent organic light-emitting diode panels with high luminance uniformity.