• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.18 no.3
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• pp.20-26
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• 2004

In this paper, luminaire optical efficiency and luminous intensity according to array of HB(high brightness) white LED(light emitting diode) and globe types of luminaire were simulated by computer and made a comparative analysis. LEDs were arranged by square of 7ea X 7ea. LED space has been divided into 8.2mm, 10mm and 15mm that mean distances between luminous centers of LEDs, and luminaire globes were classified into 30mm and 50mm 묘묘 from luminous center of LEDs. Also the simulations were made with / without globe, globe types were specified by convex and embossing types of which sizes are 8.2mm and 5.0mm, So total 27 classes of simulation were performed. This paper is to help luminire development using LED light source called digital lighting of 21th century, by studying luminire effciency and luminous intensity of different types of globes.

• Journal of the Korea Society for Simulation
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• v.19 no.3
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• pp.7-16
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• 2010

In this paper, we propose an ambient light control method based on the difference of image frames in video. The proposed method is composed of three steps. 1) The first step is to extract a dominant color of a current frame. 2) The second step is to compute the amount of change and the representative color in the changed region using the difference image. 3) The third step is to make a new representative color. The difference image is created from two images transformed into the YUV color space. The summed color difference of each pixel is used for the amount of change. The new representative color is created by synthesizing the current color and the changed color in proportion to the amount of change. We compare the variations of the light effect according to time with and without the proposed method for the same video. The result shows that the new method generates more dynamic light effects.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.15 no.5
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• pp.8-13
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• 2001

The make a decision for building remodeling, the economical value of the remodeled building should be analyzed and existing situation of the building system should be checked. For the energy issues related to the building remodeling process, careful diagnosis and re-designs of existing system should be proposed. In this research, the luminous environment for Seoul K Co. headquaters and Seoul S hotel were measured and then the re-design processes of building illumination systems were researched. With measured illuminance quantities of there cases, computer simulations for the existing situation and re-design were conducted.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.9 no.2
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• pp.50-57
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• 1995

In this paper the model was analyzed on performance evaluation for IN facility and we carried out evaluation on it's service performance using this model as an example. We used simulation method and operation analysis method as evaluation technology. As the evaluation results, the case of simulation method was nearly consistent with the case of the operation analysis method and the user-network interaction time had more effect on service performance than delay time of IN facility. We expects that the performance models proposed in this paper is useful when operating, managing and designing IN services in considering service performance.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.6 no.2
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• pp.56-61
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• 1992

This paper is reported on the simulation and test results of a constant flux vector control scheme of an induction motor without any speed detecting eqiupment, in which the adaptive current PWM inverter is used. The rotor speed is estimated form stator voltage, current and parameters of motor, and control algorithm in the system is performed with by micro processor. By comparing the waveform of input current of this system with that of the case with taco-generator, good agreement is observed except small ripple component. Experimental results which are acquired at start up and during acceleration/deceleration are quite similar to those of the simulation results.

• Journal of IKEEE
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• v.19 no.4
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• pp.603-609
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• 2015

Thermal comfort is one of the fundamental aspects of indoor environmental quality and it is strongly related to occupant satisfaction and energy used in building. In this paper, we proposes smart comfort algorithm that save energy and provide a pleasant and comfortable environment for workers by the indoor comfort conditions(Predictive Mean Vote) detection and controlling the temperature and humidity, air flow. Simulation results, heating and cooling control of the thermal comfort control can be compared with the existing general air conditioners reduces the power of 0.5kW and indoor comfort can be maintained. Also, It showed a 49.2% improvement in the light by lighting control algorithm.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.23 no.12
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• pp.1-9
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• 2009

A recent research trend on the Daylight Responsive Dimming Systems, using available daylight for energy savings, is to integrate automated roller shading systems and venetian blind systems which are vertically controlling daylight to indoor based on sun profile angle. Therefore, this paper suggests Grating Louver System into a pair glass as a new shading system, which can control daylight vertically and horizontally. The optimized spacing of louvers, which is to block direct sunlight into a space, was calculated. And then, the system was simulated for analysis and evaluation of characteristics of daylight by Desktop Radiance 2.0.

• Journal of Digital Convergence
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• v.11 no.4
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• pp.229-234
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• 2013

The purpose of this study is to develop a lighting apparatus of the illuminance and color temperature to maximize the ability of the optimal combination of light sources that can be controlled efficiently control device. Finding people comfortable feeling for indoor lighting that can be used in a variety of color temperature illumination area by combining light sensitivity can be realized. Lighting apparatus for fluorescent lamps with different color temperature of 2000K and 8000K, and by varying the quantity of each of the fluorescent lamps, the illuminance of lighting equipment and color temperature through optical simulations were evaluated. By infrared remote control receiver, divided into 5 types of relaxation, conversation, meeting, hospitality, arts and the lighting environment you want to transfer the PC0 ~ PC4 through the parallel port on the mode selected by the user at the receiving end the DC voltage output. EEFL inverter input DC voltage and the DC input voltage, depending on the level of EEFL dimming value (illuminance and color temperature) lighting environment you want to create change while using a PIR sensor EEFL automatically turn off if people do not have was developed so that the power consumption so you can save.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 1999.11a
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• pp.85-90
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• 1999

일반적으로 반사판의 반사율이 변화하거나, 사용하는 램프의 크기가 변화하면, 동일형상의 조명기구에서도 기구 효율이 변화하는 것으로 알려져 있다. 본 연구에서는 이와 같은 기구 효율변화가 어느 정도인지 알아내기 위하여, 형광등 기구의 확산 반사판과 경면 반사판의 반사율 변화와, 직관형 형광램프의 직경 변화에 따른 기구효율 변화를 시뮬레이션을 통하여 계산하여 보았다. 계산 결과 반사판의 반사율이 상승함에 따라, 그리고 램프 관직경이 감소함에 따라 기구 효율이 상승하며, 이를 이용하여 큰 에너지 절감을 도모할 수 있을 것으로 판단된다.

• Proceedings of the KIEE Conference
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• 1999.07e
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• pp.2031-2034
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• 1999

현재 우리나라에서는 도로망의 급속한 확충에 따라 터널의 수가 급속히 증가하고 있다. 터널은 운전자들이 주야간으로 안전하고 쾌적하게 주행할 수 있도록 설계되어야 한다. 이런 관점에서 터널의 조명설계는 매우 중요하다고 할 수 있으며, 터널의 안전성, 쾌적성, 경제성을 확보하기 위한 여러 가지 복합적인 요소들을 고려한 분석이 필요하다. 이 논문에서는 터널조명에 일반적으로 사용되고 있는 저압나트륨등에 대하여 대안으로 대두되고 있는 형광등에 대한 경제성 측면에서의 비교 방법론 연구를 수행한다. 각각의 등에 대하여 동일 한 터널 노면기준조도를 구현하기 위한 필요 등의 수를 시뮬레이션을 통하여 결정하고, 이를 기반으로 각 터널 조명에 소요되는 Life Cycle Cost를 기본 Model을 통하여 산정하고 비교하는 방법을 제시한다. 이러한 분석은 터널개발 사업의 정책적 결정에 있어 기초 방법과 자료로서 활용될 수 있을 것이다.