• Proceedings of the KIPE Conference
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• 2007.07a
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• pp.470-472
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• 2007

현재 수요가 꾸준히 증가하고 있는 디지털 디머 시스템은 국내 연구가 미비한 실정이다. 이러한 시점에 본 논문은 현재까지 개발한 디지털 디머 시스템과 그 기능을 소개하고자 한다. 개발한 시스템은 크게 콘솔과 디머 랙으로 나눌 수 있으며, 콘솔은 사용자와의 인터페이스와 전체 디머 시스템의 제어가 주목적이며, 디머 랙은 콘솔로부터 전송받은 각 조명 레벨을 위상각 제어 방식으로 조명기기의 밝기를 제어하도록 설계하였다.

• JOURNAL OF ELECTRICAL WORLD
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• s.249
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• pp.90-97
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• 1997

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2007.05a
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• pp.23-27
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• 2007

• Information Display
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• v.17 no.1
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• pp.27-33
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• 2016

• 전기산업
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• v.9 no.5
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• pp.52-59
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• 1998

• The Magazine of the IEIE
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• v.34 no.5 s.276
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• pp.72-82
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• 2007

• Journal of Advanced Marine Engineering and Technology
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• v.35 no.1
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• pp.102-107
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• 2011

LED-based lighting motivated by significant energy savings provides an opportunistic development of widespread free-space optical communications. Their transceivers have a variety of competitive advantages over RF including high bandwidth density, reliability, lower energy consumption, and long lifetime. But, it is difficult for existing buildings and structures such as ships and vehicles to install the communication cable to the ceiling. In this paper, controller area network (CAN)-based LED lighting communication systems were proposed. Results indicate the viability of developing inexpensive CAN interface modules and transceivers might be embedded in lighting products to support the indoor wireless networking.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.6
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• pp.163-168
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• 2011

In this paper, we propose an emotion transfer system based on LED, which presents and transmitts users emotion through Bluetooth and ZigBee using LED light. We propose an emotional LED system interacting multiple LED lighting system and implement the proposed system using smartphone and WPAN network with Bluetooth and ZigBee. For the transmission of data, ZigBee is adopted for each LED lighting system and Bluetooth is utilized for the smartphone. Also, the LED lighting systems which are connected to smartphone have both ZigBee and Bluetooth module for the heterogeneous network. The implemented system shows the validity and applicability of the proposed system.

• Journal of the Korean Institute of Intelligent Systems
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• v.21 no.3
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• pp.359-364
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• 2011

The study uses department of the sensitivity and fuzzy reasoning, one of artificial intelligence algorithms, so that develop LED lighting system based on fuzzy reasoning for systematical control of the LED color temperature. In the area of sensitivity engineering, by considering the relation between color and emotion expressed as an adjective word, the corresponding sensitivity word can be determined, By taking into consideration the relation between the brain wave measured from the human brain and the color temperature, the preferred lesson subject can be determined. From the decision of the sensitivity word and the lesson subject, we adjust the color temperature of RGB (Red, Green, Blue) LED. In addition, by using the information of the latitude and the longitude from GPS(Global Positioning System), we can calculate the on-line moving altitude of sun. By using the sensor information of both temperature and humidity, we can calculate the discomfort index. By considering the altitude of sun as well as the value of the discomfort index, the illumination of W(white) LED and the color temperature of RGB LED can be determined. The (LED) sensitivity lighting control system is bulit up by considering the sensitivity word, the lesson subject, the altitude of sun, and the discomfort index The developed sensitivity lighting control system leads to more suitable atmosphere and also the enhancement of the efficiency of lesson subjects as well as business affairs.

• Journal of Navigation and Port Research
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• v.42 no.6
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• pp.421-426
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• 2018

With regard to LED lighting devices which have currently been commercialized, LED operating sequences are being sold in a fixed state. In such a state, the external environmental factors are not taken into consideration as only the illumination environment application is considered. Currently, it is difficult to create an optimal lighting environment which can adapt to changes in external environmental factors in the ship. Therefore, it was concluded that there is a need to input the external environment value so that the optimal illumination value can be reflected in real time in order to adapt more organically and actively to the change of external environmental factors. In this paper, we used a microprocessor as an integrated management system for environmental data that changes in real time according to existing external environmental factors. In addition, a controller capable of lighting control of RGB LED module by combining fuzzy inference system. For this, a fuzzy control algorithm is designed and a fuzzy control system is constructed. The distance and the illuminance value from the external environment element are input to the sensor, and these values are converted to the optimum illumination value through the fuzzy control algorithm, and are expressed through the dimming control of the RGB LED module and the practical effectiveness of the fuzzy control system is confirmed.