• KIEAE Journal
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• 제12권3호
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• pp.101-106
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• 2012

Lighting energy accounts for approximately 20% of the electrical energy used worldwide. Thus, High efficiency Light emitting diode(LED)lighting is getting more popular as the next generation lighting replaced to traditional lighting fixtures. Also, LED lighting not only has a long lifetime but also can realize a variety visual environments through the wavelengh control. The lighting energy varies depending on the Spectral Power Distribution(SPD) even though the Illuminance level is same. Therefore, This study indicates that the difference of indoor energy consumption under the same illuminance level when Spectral Power Distribution(SPD) is different. As a result, Lighting energy consumption under red-color emphasizing SPD is about 10% lower than under blue-color emphasizing SPDs.

• 조명전기설비학회논문지
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• 제18권3호
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• pp.20-26
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• 2004

본 논문에서는 조명용 고휘도(HB, high brightness) 백색 LED(light emitting diode)램프의 배열 및 여러 가지 등기구 글로브(globe)의 형태에 따른 광도(luminous intensity)값과 기구효율(luminaire efficiency)을 컴퓨터 시뮬레이션으로 수행하여 비교분석 하였다. 즉, LED의 배열은 가로${\times}$세로(7개${\times}$7개)가 정사각형 형태로 49개를 배열하고, LED 간격은 LED의 발광면 중심부로부터 8.2[mm], 10.0[mm], 15.0[mm]로 각각 3가지로 하였으며, 등기구의 글로브는 LED발광면 중심부에서 30[mm], 50[mm] 떨어진 거리로 구분하였다. 또한 등기구 글로브가 없을 때와 있을때로 구분하여 있을 때에는 글로브 형태를 볼록 원형과 엠보(embossing)형태로 구분하고 엠보는 8.2[mm], 5.0[mm]의 크기에 따른 선택으로 시뮬레이션 27가지로 수행하여 등기구의 글로브 형태에 따른 광도 및 기구효율을 고찰해 봄으로써 앞으로 21세기 디지털조명이라고 일컫는 LED를 사용한 LED 광원(light source) 및 등기구 개발에 많은 도움이 되고자 하였다.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2009년도 춘계학술대회 논문집
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• pp.201-203
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• 2009

본 논문에서는 LED(light emitting diode)를 사용한 일반 조명에서부터 자동차 조명에 대한 LED, CNT(carbon nano-tube), OLED조명의 융합기술 현황에 대하여 살펴보았다. 정부의 15/30보급정책의 일환인 LED조명 시범보급사업(부산 및 대전 지하철역사, 김대중 컨벤션센터, 대구 및 대전 우체국 등)과 한국산업규격(KS C 7651-3)의 제정 등으로 LED 응용 조명은 시장에서의 사용으로 기존 조명기기와의 경쟁력이 예상된다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2009년도 공동학술대회
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• pp.538-539
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• 2009

해양교통안전시설인 등대 불빛은 지금까지 백열전구를 사용한 필라멘트를 이용하여 열을 빛으로 바꾸는 광원을 사용하고 있으며, 점차적으로 저전력 소비 및 장수명의 장점을 가진 고휘도 LED(Light Emitting Diode)을 이용한 LED 도등, LED 등명기, LED 등대 표체 경관조명, LED로 만든 전등 국내 개발 등 차세대 광원 "발광다이오드"는 수년내에 시장을 평정할 것으로 전망된다.

• Transactions on Electrical and Electronic Materials
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• 제12권6호
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• pp.253-257
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• 2011

This study was carried out to solve problems such as radio frequency band depletion, confusion risk, and security loss in existing visible wireless communication systems, and to determine the applicability of next-generation networks. A light-emitting diode (LED) light communication system was implemented with a controlling switching light module using the ATmega16 micro-controller. To solve the existing modulation effect and disturbance in visible light communication, an integrated interface was evaluated with a driving light module and analyzes its reception property. A transmitter/receiver using the ATmel's micro-controller, high-intensity white LED-6 modules, and infrared sensor KSM60WLM and visible sensor TSL250RD were designed. An experiment from the initial value of distance to 2.5 m showed 0.46 V of the voltage loss, and if in long distance, external light interference occurred and light intensity was lost by external impact and thus data had to be modified or reset repeatedly. Additionally, when we used 6 modules through the remote controller's lighting dimming, data could be transmitted up to 1.76 m without any errors during the day and up to 2.29 m at night with around 2~3% communication error. If a special optical filter can reduce as much external light as possible in the integrated interface, the LED for lighting communication systems may be applied in next generation networks.

• 조명전기설비학회논문지
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• 제29권8호
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• pp.1-6
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• 2015

In this paper, we propose the LED(Light-Emitting-Diode) emergency lighting in a tunnel by using the thermoelectric devices. To achieve high generated power, thermoelectric device should be have high Seebeck coefficient and small contact area. Also, we reveal that a moderate heatsink required for high generated power. From the waste heat of LED tunnel lighting module (25W), the generated power was 0.062W by thermoelectric device, and it could illuminate for 1hour after charge the battery of emergency lighting during about 101hours.

• 한국실내디자인학회논문집
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• 제21권6호
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• pp.129-136
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• 2012

As the importance of eco-friendly and energy saving issues are emphasized in lighting as consciousness about energy saving is elated worldwide, demand for natural resources such as gas increases, supply of LED lighting is spread. Owing to white LED's development and price fall. It is expected to LED High Luminance Emitting Diode. LED's brightness and long life-time that surpass fluorescent light in the latest as well as is used by back light source of thin film LCD, low electric power attrition rate by advantage do and widen the market at the world lighting lamp market that is potential market. Accordingly, study about suitability of LED lighting is activated but space that apply actual LED lighting fixtures yet is less and advanced researches about LED fixtures' applied apaces are slight compared to existing light source up to now because is not many on this. The result of the experiment shows similar tendency with the existing light sources'. Through a psychological reaction experiment in the LED lighting experiencing space that can control of color temperature and lighting level, this study is wished to use to the data for lighting design of space that LED lighting fixtures are applied hereafter.

• 대한건축학회논문집:계획계
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• 제35권1호
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• pp.99-106
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• 2019

This study aims to recommend the proper Color rendering index (CRI), the Correlated Color Temperature (CCT), and illuminance levels of Light-Emitting Diode (LED) lighting based on the analysis of the criteria of the current CRI, the CCT, and illuminance levels in merchandising spaces with LED lighting conditions. It would be a basic material to apply in line with user preference for LED merchandising lighting. To this end, it examines relevant literature review on the experiments designed to test whether lighting characteristics affect brightness perception, color appearance, and pleasantness. Highly saturated colors appear brighter than low saturated colors. Two lighting applications - grocery and clothing shop - were created in elaborating the effect of LED lighting characteristics of CRI on color appearance and the CCT and illuminance on pleasantness. The findings show that the criteria of CIE Ra<80 are appropriate to provide better color appearance of illuminated products in terms of LED lighting that can enhance color saturation, particularly for the red color. Furthermore, 2700 K and less than 500 lux for grocery, 4000 K and more than 500 lux for clothing shop are found to be the proper the CCT and illuminance levels respectively to bring better preference under LED lighting.

• 한국컴퓨터정보학회논문지
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• 제19권2호
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• pp.109-115
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• 2014

에너지의 고갈을 대비하여 자연을 이용한 태양에너지에 대한 연구는 매우 중대하고 필연적인 과제이다. 이와 더불어 최근 우리나라는 저탄소 녹색성장에 있어 신성장 동력산업의 일환으로 저소비전력, 환경친화적인 조명기구로 LED(Light Emitting Diode)를 선정하여 연구 개발을 촉진하고 이를 활용한 다양한 새로운 산업이 창출되고 있다. 본 개발 내용은 리튬 이온 배터리의 뛰어난 성능을 가지며 폭발 위험성이 현저히 적은 리튬 폴리머 전지를 사용한 태양광 LED 조명시스템을 개발하였다. 태양광 패널은 100W 용량으로 제작하고, 전원공급시스템은 다양한 생활전기로 사용할 수 있도록 직류(DC) 및 교류(AC) 전원을 모두 갖추어 기능상의 편의를 고려하였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2009년도 하계학술대회 논문집
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• pp.289-289
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• 2009

Light emitting diode(LED) has many advantages including lower energy consumption and longer lifetime and eco-friendly in comparison with traditional light sources. Spheric plastic lens generally used in LED lighting occurs aberration and ghost image which give displeasure and deteriorate vision quality in human eyes. Using the optical program (LightTools$^{TM}$, CodeV$^{TM}$), we were confirm the aberration and ghost image in optical simulation and employed aspheric lens form in the lens design to improve these problems. From the comparison of the simulation results between the aspheric lens and the spheric lens, we were ascertain to be improved both aberration and Ghost image.