• Photonics industry news
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• s.63
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• pp.8-11
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• 2011

최근 녹색성장 및 에너지절감 등의 트렌드에 힘입어 LED조명에 대한 일반인들의 관심이 급증되고 있다. 이에 국내외 글로벌 기업들이 LED조명 관련제품을 봇물처럼 쏟아내고 있다. 광주지역 광산업체 등 중소기업들도 신제품 출시에 박차를 가하고 있다. 연구기관 및 관련 전문가들은 2010년 국내 LED조명 시장은 6,651억원 2015년에는 3조 7,000억원대에 이를 것으로 예측한다. 이는 LED가 고효율 저전력, 반영구적 수명, 공간효율성, 다양한 연출효과, 친환경적인 장점이 크기 때문이다. 그동안 기술발전에 힘입어 가로등, 건축 경관, 장식, 사인조명 뿐만 아니라 옥내에서 사용하는 할로겐, 백열전구 형광등 등도 LED조명으로 빠르게 대체되고 있다.

• Design & Manufacturing
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• v.16 no.2
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• pp.20-25
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• 2022

In line with the rapid economic growth of many countries, fossil fuel energy sources are also rapidly depleting. Therefore, the price is also rising rapidly, so it is necessary to develop new and renewable energy sources such as hydropower, geothermal power, nuclear power, wind power and solar energy to replace fossil fuel energy in the future. In this study, development of rotating concentrator module system, development of rotating module control control system, development of lamp and charge control controller, configuration and prototype production of rotating concentrating solar LED street light system, efficiency of rotating concentrating solar LED street light, and power production. The research was conducted in the order of evaluation of comprehensive performance tests such as consumption and consumption. As a result, the developed high-efficiency rotation-concentrating hybrid solar LED street light module system has a 50% higher light-gathering efficiency than existing products by tracing sunlight by self-developing a rotation-collecting module on existing solar LED street lamps according to the characteristics of Korea's topography. and the power generation was improved by more than 40%.

• Proceedings of the KIEE Conference
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• 2008.05a
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• pp.149-150
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• 2008

본 논문은 가로등 LED조명 설계를 위해 LED(Light Emiting Diode)소자 특성 분석 및 시뮬레이션을 통해 광특성을 개선하고자 하였다. $30^{\circ}{\sim}50^{\circ}$ 사이의 2차 렌즈 설계를 통해 조도 분포 특성 및 광분포 특성을 확인하였으며 LED 모듈의 간격 배열을 통해 램프를 설계 하고자 하였다. 그 결과 2차렌즈 35도 각도와 LED 소자간의 간격을 3Cm로 설정할 경우 최적의 광 특성을 확인할 수 있었다.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.60 no.4
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• pp.885-891
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• 2011

In this paper, we studied dc leakage current properties analysis of LED lamps of road and landscape lighting when leakage current appeared in dc power line. Generally, converter of LED lighting is divides to insulated type and non-insulated type according to components. When electric leakage happened in AC power line, earth leakage breaker(ELB) senses leakage current and interrupts electric circuit. In dc power source, We need experimental verification about dc electric leakage for electricity safety. In normal wiring conditions and in the water, in case of using insulated type of converter, dc leakage current did not occur. However, in case of using non-insulated type of converter, dc leakage current occurred and passed through into the ground. We found that there is a hazard of electric shock by dc leakage current. We expect that the results of these studies would be helpful for electrical safety of LED lamps for road and landscape lighting.

• The Journal of the Korea institute of electronic communication sciences
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• v.17 no.6
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• pp.1229-1236
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• 2022

In this paper, we studied accident-aware smart streetlights to prevent secondary accidents when driving on highways. It used Arduino and sensors to inform drivers of weather conditions, incorporated functions such as LED brightness control according to sunlight and night driving vehicles, and used Raspberry Pi camera OpenCV to learn various traffic accidents, natural disasters, and wildlife.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.139-140
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• 2015

LED 조명은 고효율화와 고출력화에 따라 실내조명, 경관조명, 가로등조명 등 생활조명산업에서 급속히 적용되고 있으며, 초박형 소형 경량화, 장수명, 수십 마이크로 초 단위의 고속응답 속도, 광색의 시인성 및 재현성 등이 우수하여 IT, BT, NT기술과 융합되어 의료, 농업, 환경, 디스플레이, 정보가전 등의 넓은 응용 분야로 확대되고 있어, LED 디밍제어 기술을 적용하여 다양한 분야에서의 활용에 필요한 성능요건을 만족시킬 수 있다. 본 논문에서는 LED 조명의 밝기조절을 위한 제어방식을 Buck 컨버터를 활용한 정전류 구동방식을 적용하여 제어회로를 보다 단순화하고, 전용 IC를 활용하여 회로구성 방식에 대하여 제안한다.

• IEMEK Journal of Embedded Systems and Applications
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• v.6 no.1
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• pp.25-31
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• 2011

LEDs are becoming the most suitable candidate replacing traditional fluorescent street-light lamps because of its energy efficiency and high brightness. Furthermore, most countries are urging to pursue energy savings in conjunction with IT and sensor network. In order to conserve energy of LED lamp and ensure the safety of pedestrian, we propose a new smart control method for LED light system based on USN using compound sensors, such as illuminance, motion, temperature and humidity sensor. An elaborate simulation shows that the proposed system with a smart control based switching can reduce the energy by 40%, compared to the previous street-light system with a fixed time based switching.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.21 no.2
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• pp.137-142
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• 2021

A Photovoltaic power streetlight is a system that uses solar energy to charge a secondary battery and then uses it for night lighting through a lamp, and can be configured as a standalone or grid-connected type by installing an LED streetlight at the load end. The energy generated through the solar cell module can be charged to the secondary battery through the charge/discharge control device, and then the LED street light can be turned on and off by comparing the power generation voltage and the charging voltage according to the monitoring of solar radiation, or by setting a specific time after sunset or sunrise. Based on these contents, this paper designed and manufactured a simulated solar power streetlight for education using new and renewable energy utilization and storage functions. Using these educational equipment, students can 1) understand the flow of energy change using renewable energy including sunlight as electric energy, 2) understand new and renewable energy, and cultivate basic design and manufacturing application power of related products, 3) The use of new and renewable energy through power conversion and strengthening of practical training and analysis through hardware production can be instilled.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2010.06a
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• pp.162-162
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• 2010

In this study, optical analysis for 100W LED safety street lighting was conducted. Experimental research on such single LED was the first undertaken. simulation modeling based on optical properties of single LED has compared single LED product also designed 100W simulation modeling has compared average road illuminance with Korean Industrial Standards for LED safety street lighting(KS C7658:2009). 100W safety street lighting (model: CE180-ST-OS) designed by simulation has been also compared between product and 100W simulation modeling, and error rates have showed average 5.6[%]. Designed 100W LED safety street lighting base on simulation modeling was proven by comparison experiments. Through the simulations and the corresponding analysis, it was found that the tested 100W LED safety street lamp had reasonable performance. Design method for LED safety Street lamps have been summarized, based on the optical analysis.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2009.05a
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• pp.149-152
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• 2009

In this paper, We has been studied the lifetime degradation of LED lighting system compared to MH lighting. Especially the effect of temperature level on the lifetime degradation has been investigated. The results show that temperature plays a role in the lifetime degradation and slope of degradation line represent as temperature level differently. However, It is possible to estimate the lifetime of LED lighting system using equation induced the slope of degradation line.