• 한국콘텐츠학회논문지
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• 제12권2호
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• pp.52-59
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• 2012

최근 LED는 조명, 광고판, 디스플레이 등 다양한 분야에 널리 활용되고 있다. 이번 연구에서 우리는 공연에서 사용하기 위한 무대 의상에 LED 기술을 융합시키는 방법을 다룬다. 우리는 공연 환경의 요구 조건들을 충족시키기 위해서 무선 네트워크, 임베디드 시스템, 컨트롤 재킷, 디지털 스킨, 패턴저작도구로 구성된 디지털 의상 플랫폼을 제안하며, 이것은 LED 조명 효과를 가진 디지털 의상을 만드는데 활용된다. 임베디드 시스템은 무선 네트워크를 통해 공연 제어 시스템으로부터 제어 신호를 받고 그에 따라 실시간으로 LED 빛의 색 변화를 제어한다. 임베디드 시스템을 장착할 수 있도록 설계된 조끼 형태의 컨트롤 재킷은 임베디드 시스템과 LED를 연결하는 커넥터 역할을 하고, LED가 디자인된 외피 개념의 디지털 스킨은 연출가의 의도에 따라 의상에 디자인된 LED에 의해 그 자체로 발광체가 된다. 패턴저작도구는 타임라인 기반으로 LED 빛의 색이 변화하는 다양한 패턴들을 만드는 것을 도와준다. 디지털 의상은 새로운 형식의 움직이는 조명으로 활용되며 무대 표현 기술의 확장을 가능하게 한다. 우리는 디지털 의상 플랫폼을 적용한 디지털 의상을 제작하여 실제 공연에서 사용함으로써 디지털 의상 플랫폼의 안정적인 사용성과 활용 가능성을 검증하였다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2010년도 추계학술대회 논문집
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• pp.867-868
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• 2010

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2011년도 춘계학술대회 논문집
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• pp.1091-1092
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• 2011

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2007년도 춘계학술대회 논문집
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• pp.141-144
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• 2007

BLUs are major component in LCD industry which occupies 90% or more of FPD market worldwide and BLU market is expected to be expanded continuously according to the trend of miniaturization, slimness, low power consumption and low weight. The larger the BLU market scale, the more important standardization of performance evaluation techniques to clearly prescribe the product specification. Currently the government is promoting the establishment of related laws and coincidence with international standards to cope with agreements such as WTO/TBT, but the nongovernmental standardization activities are not enough to be actualized. Furthermore, BLU related components such as CCFL, EEFL, inverter and reflector are already developed for localization to substitute imports with home products but collective standardization, national standardization, and international standardization are still not done. So, performance specifications and evaluation methods for normal fluorescent lamps or industrial lamps are being adopted and used as national standards and safety certification standards instead. Making these standards enables to prepare a chance to penetrate into global market and to promote world best products. Also, by making this collective standard, it provides chances to take part in international standardization activities, to protect domestic industries and technologies, to obtain the trend of advanced technologies, and to be predominant over other countries. That is to say, CCFL standardization helps raise 21st century national strategic technology policy and go ahead of globalization of core technologies.

• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1998년도 춘계학술대회논문집
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• pp.194-199
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• 1998

The purpose of this study is conducted to evaluate the psycho-physiological effects of the dynamic lighting on VDT workers and to establish the dynamic lighting design guides. The main experimental factors are changes of illuminance. There were five conditions including 1) ripid change, 2) slow change at 300lx .approx. 500lx, 3) a static illuminance level at 300lx, and 4) rapid chante, 5) slow change at 200lx .approx. 300lx. The ranges of change were set typical illuminance level for the simple visual task requirement and reasonable to a VDT task ; 200-300-500lx. The psycho-physiological measurements used were EEG, R-R interval, CFF, near point accommodation, feeling perceived fatigue, and work performance. Analysis of psycho-physiological factors shows that higher illumination level conditions are more affirmative effects than lower on VDT workers under 500lx except for the results of feeling perceived fatigue. And about the speed of changes of illuminance level. The conditions of slow change were better than the others in terms of the work performance as well as psycho-physiological results.

• 한국태양에너지학회 논문집
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• 제26권3호
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• pp.33-43
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• 2006

Daylight dimming control system was analyzed for an indirect lighting system in a small office space with a double skin envelope system. Computer simulations were performed for photosensors with three shielding conditions. The photosensors were placed on the center of ceiling, and backwall. Three sky conditions defined by CIE were considered. Overall, control performance was not very excellent for all conditions. Fully-shielded photosensor achieved good control performance for some cases, but partially-shielded and unshielded photosensors failed to achieve target illuminance. The variation in desktop illuminance due to daylight was examined for a variety of daylight conditions. Linear correlation between desktop illuminance and photosensor illuminance was analyzed using ANOVA.

• KIEAE Journal
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• 제13권1호
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• pp.39-45
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• 2013

The daylighting control system has to be applied to prevent the excessive incident daylight and reduce energy use. As the one of the most useful daylighting control systems, the blind system is simple and easy to install on the window for small office buildings. This study aims to evaluate the summer energy performance of small office buildings by venetian blinds and energy saving strategy of ministry of knowledge economy in korea. For the study, the simulations have been executed on blind installation conditions and lighting control methods. As results, the energy loads cut down 22 to 25(%) by using blind energy. Also, the efficient shows high on EMS system and low on $45^{\circ}$ slat angles. Also, using energy saving strategy can reduce about 13(%) energy load.

• 융합정보논문지
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• 제8권5호
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• pp.153-158
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• 2018

본 논문에서는 가시광 통신시스템에서 조명과 통신의 성능을 동시에 만족하기 위한 Dimming level control 기법을 연구하였다. 일반적으로 가장 많이 사용되는 OOK와 RZ-OOK변조 방식의 경우, 연속적인 Burst Zero Duration이 발생하면 조명 기능이 심각하게 저하된다. 이는 조명뿐만 아니라 시스템 전체의 성능을 열하시키는 원인이 된다. 본 연구를 통해, 기존 시스템의 Dimming level특성을 분석하고, Dimming level을 높이기 위한 기법으로 Illegal Pulse Insertion(IPI) 알고리즘을 제안하였다. 이를 통해, Dimming level을 효과적으로 제어하고 기존 변복조 시스템에서 나타나는 플리커(flicker) 현상과 Dimming level 감소를 해결하여 조명과 통신 양쪽 모두의 QoS를 향상 시킬 수 있다.

• 한국위성정보통신학회논문지
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• 제11권1호
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• pp.21-25
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• 2016

본 논문에서는 이기종 통신 기반의 스마트 조명의 선택적 알고리즘을 제안한다. 스마트 조명은 조명의 역할뿐만 아니라 통신의 역할을 동시에 수행한다. 이기종 통신을 이용한 스마트 조명의 BER 성능을 높이기 위해, Line-of-Sight(LOS)/Non-LOS 채널에서 스마트 조명과 센서와의 거리, 조명사용시간, 사용자 요구를 위한 낮은 전력소모량에 따라 Optical Camera Communication(OCC), Wi-Fi, BLE 중 적합한 통신방식을 선택하도록 하였다. 그리하여 LOS/NLOS 채널에서 제안된 알고리즘의 성능과 기존의 방식과의 시뮬레이션 결과 비교를 통해 성능 향상을 확인하였다.

• KIEAE Journal
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• 제6권1호
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• pp.3-10
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• 2006

As has been expected, economic factors are a major consideration in almost every decision in building design process. Assuming that improving a lighting system, existing or proposed, will reduce operating cost, what preliminary economic guidelines can be established to determine whether any proposed investment appears cost effective? In such a case a reasonable technique to compare system costs is by life-cycle costing. Stated simply, a life-cycle cost represents the total cost of a system over its entire life cycle, that is, the sum of first cost and all future costs. This paper aims to exemplify the benefit of daylighting in term of economic consideration. Four different electric lighting system designs are proposed and a lighting control system that is continuously operating according to the level of daylight in the space has been adapted. The accumulated performance of electric and daylighting is figured out to declare the effective depth of daylight in the space. The analysis on the saving amount of lighting energy due to daylight has been undertaken in answer to the question, that is, several projects are being considered, which is the most desirable from the cost-effectiveness viewpoint. The result shows clearly that although denser layout of lighting fixtures might be more effective to interface to the level of daylight ceaselessly changeable, its economic benefit may not meet the expected criterion the reason of increased initial investment and maintenance cost for the fixtures and control hardware.