• 감성과학
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• 제16권3호
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• pp.305-310
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• 2013

This user-centered research aims to empirically evaluate color temperature (K) and illuminance (lx) of residential bathroom lightings to determine the most optimal lighting conditions for productive task performance as well as for satisfying users' emotional needs. Using 3 LED lighting fixtures, 4 types of lighting contexts were investigated; main lighting, task lighting, shower lighting, and bath lighting. Two lightings were installed parallel to the vertical edges of the main bathroom mirror to be used as main and task lighting, while another fixture was installed above the bathtub to be used for shower and bathing. For each lighting context, subjects (N＝54) were instructed to perform a few tasks during which time the users were exposed to different lighting conditions with color temperature ranging from 2700 K ~ 6500 K and illuminance ranging from 100 lx ~ 700 lx. Upon completing the given tasks, subjects were asked to evaluate the lighting conditions and their applicability for performing the given tasks. Based on the user evaluations, the most optimal lighting conditions for the different lighting scenarios are as follow: 1) 3500 K ~ 4300 K and 150 lx for main lighting, 2) 3500 K ~ 4300 K and 500 lx ~ 700 lx for task lighting, and 3) 2700 K ~ 3500 K and 100 lx ~ 150 lx for shower/bath lighting. These results can be used to adjust the lighting standards suggested by KS, as well as be utilized by both engineers and designers in designing new types of user-centered bathroom lightings.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2009년도 추계학술대회 논문집
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• pp.159-162
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• 2009

Surface lighting using OLEDs for desk/task lighting has been analyzed its electrical and optical characteristic with a fluorescent lamp which has triple wavelength peak. We have confirmed the good possibility of OLEDs for desk/task lighting. Our engineering sample which has fabricated by co-worker has its characteristics which are luminous efficacy 11.781m/W at 509mW, CRI Index 75, CCT 4479K, CRI coordinate x=0.378, y=0.4547, respectively. Addinationly another OLEDs samples are used for compartive analysis in view of desk/task lighting.

• 한국실내디자인학회논문집
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• 제13권4호
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• pp.196-203
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• 2004

In The Lighting design is important to acknowledge appearance space. Development of artificial light makes a extension to life space in the Modern life. With the rapid development of efficient light sources, have lighting design acquired the tools that allow artificial lighting to be produced with adequate illuminance levels. However, by the task of defining the objectives and methods behind discipline, of deciding on the criteria by which the artificial lighting that is now provide many available data to be anpaied. The main concern is which illuminace levels and types of lighting will ensure optimum visual performance, high productive and safety at design which are affordable. This study is support to standard design process with material reflection rate, installing the lighting fixture, task illuminance level and automatic arithmetic calculation during the lighting design. Lighting Design database can check and support other final lighting level. A quantitative light that is primarily oriented toward providing a recommended illuminance level, the criterion of develop a concept that goes beyond the requirements that would ensure productivity and safety to meet the needs of the architecture and interior space. illuminance level is compose to space task and space code according to KS A 3011. To be able to design the visual effect of an environment the central reference quantity has to provided the Database.

• 설비공학논문집
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• 제23권3호
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• pp.188-193
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• 2011

For a long time work or study, pendent task lighting system prepared with phosphor luminescent film LED was developed for eye protection and working efficiency improvement. Developed lighting system was used together with pendent and ambient lighting. Such as, we made comfortable lighting environment system. Evaluation for developed lighting system, that had proceeded to Mock-up test and subjective evaluation. Also It had proceeded that lighting environment analyzed and compatibility valuation of installation. In subjective evaluation, the students have expressed themselves satisfied to phosphor luminescent film LED lighting system. In Mock-up test, It is not problem to intensity of illumination, luminance and color temperature. Therefore, developed LED lighting system was installed at the Daegu apartment. It is having a P.O.E study progress to phosphor luminescent film LED lighting system.

• 조명전기설비학회논문지
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• 제23권7호
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• pp.1-7
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• 2009

The research aims at providing data needed for planning the lighting of a study room by comparing the lighting environments of study rooms for urban and rural juveniles. The subject of the research was 300 students in middle schools in Daegu and Checngdo-gun, Gyeongsangbuk-do (Daegu 150 houses and Cheongdo 150 houses), and their study rooms were examined. The following is the result of the research. First, rural students stayed more time in their study room than urban students. The task that rural students (studying) and urban students (studying and using computer) all did in their study room was mainly visual work Second, although the sizes of rural study rooms were bigger than those of urban study rooms, urban study rooms had more light sources than rural study rooms. In the rate that of having a task lighting, the city(87.1[%]) was higher than the country (45.7[%]). However, the rate of using a task lighting was lot high in both the city and the country. Third, the result that compared the average values of illuminations on desk planes was that the average value of the city was 3.4 times higher than that of the country. Also, the average value of the country did not meet the standard illumination of Korean industrial standards (KS). In particular, it did not reach the lowest standard. The result is related with that only 52[%] of students who had a task lighting used it. Finally, the satisfaction of lighting environment in the city was generally higher than the country. Especially, although the country had a low illumination, the user showed a high satisfaction. It indicates that people living in the country need to understand about the needs of illumination.

• 조명전기설비학회논문지
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• 제29권9호
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• pp.1-9
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• 2015

The aim of this study is to deduce color temperature and illuminance by conducting the preference & affective evaluation consequent on illuminance change of ambient light in case of the lighting method of ambient light mixed with task light in time of reading which is visual work action among the action in learning space. As a result of the prior survey on preferred lighting method in time of the act of reading targeting 20 experts before doing evaluation, the method of lighting mixed with ambient light and task light was found to be the highest. Such a result is analyzed to be attributable to the fact that the less the difference in illuminance of nearby space and work surface because of the mixed method of lighting, the less the glare, which makes a reader feels easy and concentrate on reading. On the basis of descriptive statistics of evaluation results and impact analysis by category, this study recommends the application of combinations of ambient light illuminance ranging from 40lx to 100lx with color temperature of 5500~6000K in case of the method of lighting mixed with general light and task light.

• 한국통신학회논문지
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• 제37C권11호
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• pp.1020-1026
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• 2012

본 논문에서는 LED 가로등의 에너지 효율을 높인 RTOS 기반의 점등제어 시스템을 제안하였다. 제안된 시스템은 RTOS 기반의 점등제어를 위하여 LED 가로등의 제어 모듈을 3개의 태스크로 세분화하여 실시간으로 처리하도록 하였다. 첫 번째 태스크는 조도를 측정하여 LED 점등신호를 전달하고, 두 번째 태스크에서는 모션디텍터를 이용하여 움직임 감지 신호를 전달한다. 세 번째 태스크에서는 앞에서 전달된 신호를 통하여 LED를 점등제어 하도록 설계하였다. 시스템의 검증을 위해 ATmega128 MCU에 직접 포팅하여 동작 상태를 검사하였으며, 실제 LED 가로등의 필드 실험을 통하여 조도분포와 동작 상태를 검증하였다. 본 논문에서 제안한 RTOS 기반의 점등제어 시스템은 여러 기능들을 각각의 태스크 모듈로 분리하여 독립성을 보장하기 때문에 시스템의 성능 향상 및 추가 기능들을 가능하게 하고, 지능적인 패턴 점등제어로 인하여 최적의 에너지 절감 효율성을 보였다.

• 조명전기설비학회논문지
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• 제18권1호
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• pp.1-8
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• 2004

오늘날 축구는 세계적인 주목을 받는 스포츠가 되었다. 특히, 2002 KOREA-JAPAN 월드컵은 한국에 대한 깊은 인상을 심어 주었다. 축구경기장의 조명시스템 설계에 있어서 가장 주요한 기술적 목적은 경기장의 어디에서나 최적의 분포를 나타내도록 하는 것이다. 이렇듯, FIFA는 경기장의 어디에서나 선수, 청중, 방송관계자등에게 일정한 수준의 조도를 제공할 수 있도록 규정하고 있다. 본 논문에서는 경기장의 조명타워의 위치선정에 따른 최적의 수평면 조도와 수직면 조도를 찾기 위한 알고리즘을 제시하였다. 본 논문에서는 Philip's Calculux 프로그램을 이용하여 조명타워의 위치에 따라 수평면 조도, 수직면 조도, 균제도, 글레어 등을 계산하였다.

• 감성과학
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• 제14권3호
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• pp.371-384
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• 2011

LED 조명의 색상이 정서자극의 평정과 재인에 어떤 영향을 미치는지를 알아보기 위하여 세 개의 실험을 실시하였다. 실험 1과 2에서는 IAPS 정서사진을 사용하여 각각 Red, Green, Blue, 및 White와 Cyan, Magenta, Yellow, 및 White의 조명색상조건에서 정서평정(정서가, 각성차원) 과제와 재인기억과제를 실시하였다. 실험 3에서는 정서단어를 사용하여 Red, Green, Blue, 및 White 조명색상조건에서 두 과제를 실시하였다. 실험 결과, 정서평정과제에서는 일차 색상(RGB)의 경우, LED조명 색상이 Red일 때는 흥분을, Green일 때는 유쾌 정서를 유발하였고, 이차 색상(CMY)의 경우, Magenta와 Cyan은 Red와 Green과 유사한 패턴의 정서 반응을 유발하였으나 그 강도는 약하였다. 재인기억과제에서는 실험 1과 실험 2의 경우, Green과 Cyan 조명색상조건에서 제시되었던 사진자극들에 대한 반응이 다른 조명색상조건에서 제시되었던 사진자극들에 비해 약간 빠른 경향이 있었으나 유의미한 차이는 아니었다. 하지만 실험 3에서는 Green 조명색상조건에서 제시되었던 정서단어들에 대한 재인기억반응이 유의미하게 빨랐다. 이러한 결과로 Red나 Magenta와 같은 난색들은 불쾌나 흥분과 관련된 감성을 유발하는 반면, Green이나 Cyan과 같은 한색들은 유쾌나 이완과 같은 감성을 유발하는 경향이 있으며, 일차 색상들이 이차 색상들보다 강한 정적 내지 부적 감성을 유발함을 알 수 있다. 특히 실험 3의 재인 기억과제에서 나타난 결과는 시각 자극보다 언어 자극의 기억수행에 Green 색상의 LED 조명이 더 유리함을 시사한다.

• 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.