• Title, Summary, Keyword: Lighting

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Development of a Low-cost Lighting System for Line-acan Camera (라인 스캔 카메라를 위한 저가형 시 균일 조명장치 구현)

  • Kim, Hong-Gap;Kim, Hyeong-Seok
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.49 no.5
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    • pp.235-240
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    • 2000
  • A low cost lighting system for line-scan cameras has been developed with 3-phase power. When exposure time of line-scan camera is shorter than fluctuation period of illumination, the average gray value of each acquired 1-D image varies. Detecting defects on the objects's surface under such illuminating environment is very difficult. The proposed lighting system is composed of low-cost fluorescent lights based on 3-phase power. The specially designed lighting pack and the properly selected lighting position enable to get the rippleless lighting. The principle of the proposed lighting system has been explained analytically. The lighting system has been tested for fabric inspection with line-scan camera and it's efficacy has been proved.

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The Study of Costomer's Mood Preferences Influenced From The Lighting Environment-In Coffee Shop- (조명환경이 제공하는 MOOD에 대한 고객의 선호도 조사연구-Coffee Shop을 중심으로-)

  • 강무진
    • Korean Institute of Interior Design Journal
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    • no.4
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    • pp.16-21
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    • 1995
  • Although it has been suggested that lighting influences our moods, little is known about dimensionality of mood patterns. The knowledge of consumer's mood pattern in lighting condition may provide interior designers with a valuable information for the lighting design. This article investigates the underlying structure of moods occuring in lighting conditions. Meanwhile, this examines custom-ers' desired mood type of lighting, and explores the influ-ence of individual characteristics on selecting the preffered lighting moods. The result uncovers five discriminable patterns of mood-dynamic, intimate, delightful, elegant, and serene feeling results from well organized lighting system. Among the five moods, serene atmosphere appears to be the most preffered mood from respondants. It is also found that the perceived preference of lighting atmo-sphere varies across personal characteristics of the cus-tomers, socio-economic differences and the visiting pur-poses to the coffeeshop. These findings present interest-ing and potentially valuable implications for interior de-signers that proper planning of lights which inducemoods can achieve dramatic effects and aid in the cre-ation of the desired atmosphere.

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Inorganic phosphors for LED applications

  • Winkler, Holger;Barnekow, Peter;Benker, Andreas;Petry, Ralf;Tews, Stefan;Vosgroene, Tim
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.56-59
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    • 2009
  • In the nineties the invention of the InGaN blue LED has innovated illumination technology. Currently LCD backlighting and more and more general lighting applications are based on white LEDs comprising of inorganic phosphors and blue emitting InGaN chip. Well established phosphor materials are ortho silicates and garnets like yellow emitting YAG:Ce. In our paper we demonstrate that garnet materials also allow for green light emission for both, general lighting and backlighting LED applications.

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A Preliminary Study on the Lighting Design of Hospitals for LED Lighting Application (LED 조명 적용을 위한 의료시설 조명환경계획에 관한 기초연구)

  • You, Min-Jeong;Hong, Seong-Kwan;Choi, An-Seop
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.25 no.12
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    • pp.1-10
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    • 2011
  • Recently medical facilities that can help to heal the interpretation have evolved as a healing space. Accordingly, the patient's emotional, psychological and social ward plan to meet the needs of the patient to recover is important. The medical team is also related to the nature of human life, so they are experiencing high stress levels compared to other professionals. However, most places don't consider the user's psychological behavior. The purpose of this study is to build user-friendly lighting environment using LED lighting. LED lighting is easy to adjust illuminance and color temperature, and it is can be implemented in the medical area.

The characteristics research of silicon solar cell Degradation (실리콘 태양전지 열화특성 분석연구)

  • Choi, Seok-Joon;Shin, Sang-Wuk;Lee, Se-Hyun;Rho, Jae-Yup;Kwon, Ki-Tae;Lee, Jeong-Keun;Seo, Jeong-Jin;Lee, Gyu-Seoung;Hwang, Myung-Keun
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • pp.89-92
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    • 2009
  • In this paper, We observed degradation of general poly-cristalline silicon solar cell by light and heat. This is very important to define solar cell's characteristics. So we test eight cells that made of poly-cristalline silicon. We expect to the result of this experiment is useful for researching and measuring solar cell's characteristics.

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Comparative Analysis on Lifetime of Fluorescent Induction Lamp (무전극 형광램프의 수명 비교 분석)

  • Jeon, Sang-Kyoo;Cho, Mee-Ryoung;Choi, Suk-Joon;Rho, Jae-Yeop;Lee, Se-Hyun;Shin, Sang-Wuk;Hwang, Myung-Keun;Lee, Do-Young;Yang, Seong-Yong
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • pp.202-204
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    • 2008
  • This paper gives a comparative analysis on lifetime of the fluorescent induction lamp. We have treasured and analysed optical characteristics of circular type fluorescent induction lamps, which has A and B types, to estimate lifetime. In the result of analysis on lifetime, $B_{10}$ lifetime of A and B type lamps are 466 hours and 1,595 hours, respectively.

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A Study on the Reciprocal Relationship Between Dance Choreography and Stage Lighting (무용안무와 무대조명의 상호적 관계에 관한 연구)

  • Chang, So-Jung
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.29 no.9
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    • pp.10-13
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    • 2015
  • Stage lighting plays a significant role in drawing out the mood and images that are intended by the choreographer. It is related to the dancers' movements and affects them both directly and indirectly. This study is on a reciprocal relationship between dance choreography and stage lighting, covering a broad range of functional factors of lighting effects on the dance choreography. Also, the data on preferred lighting colours and their frequency of usage are gathered through surveys by lighting specialists. The data is used to identify the lighting colour in general dance choreography. It is collected to serve the purpose of providing opportunities to acknowledge the needs of various colour changes on the stage. It is hoped that a collaboration of studies related in this subject are continuously promoted and researched in producing high quality dance performances.

Energy consumption by Spectral Power Distribution Of LED lighting (LED 조명의 분광 분포에 따른 건물에너지 소비)

  • Jung, Ho-Youn;Kim, Hyo-In;Kim, Gon;Yun, Geun-Young
    • KIEAE Journal
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    • v.12 no.3
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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.

A Green LED Sensitivity Lighting System Using Smart Phone (스마트폰을 이용한 그린 LED 감성조명 시스템)

  • Cho, Myeon-Gyun
    • IEMEK Journal of Embedded Systems and Applications
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    • v.7 no.2
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    • pp.103-111
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    • 2012
  • This paper introduces a novel concept of 'A Green LED Sensitivity Lighting System' which can automatically estimate QoS(quality of service) and emotional requirements of user using smart phone. And it can intelligently control ambient illumination lamp to conserve electric energy and to satisfy human sensitivity. The proposed system has 4 control modes; emotional lighting, smart lighting, green lighting and realistic lighting modes in order to comfort man's emotion, to maximize work efficiency, to save energy consumption and to make the entertainment more fun, respectively. When we choose green lighting mode for indoor office situations, an elaborate simulation shows that the proposed system with home network can reduce the energy by 50% compared to conventional light control system with a fixed time-based switching.

A Study on the Development of LED Spot Luminaire for Image Lighting (영상조명용 144[W] LED 스폿 등기구 개발에 관한연구)

  • Lee, Jang-Weon;Im, Jee-Weon
    • The Journal of The Institute of Internet, Broadcasting and Communication
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    • v.10 no.5
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    • pp.271-276
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    • 2010
  • This study manufactured spot lighting fixtures for the broadcasting stage and LED lighting fixtures, measured the illumination, dimming, and color temperature, and installed LED lighting and spot Fresnel lighting to the camera by turns with the same subject to confirm and look into the possibility of replacement of LED lighting fixtures by shooting the figures and comparing them. The analysis of the photographed subject found that the lighting apparatus of LED 144[W] was superior to the tungsten halogen illuminator of 1 [kW] in terms of brightness and color of an image. The measuring of the energy used in 144 [W] LED lighting equipment and tungsten halogen 1[kW] lighting equipment suggested that LED saved more than 80 [%] of energy in the same intensity of illumination. The comparison of the light distribution and light intensity distribution of halogen tungsten illuminator of 1[kW] and LED 144[W] lighting apparatus found that when a subject received concentrated lighting, effective lighting is possible because the illumination intensity on the surface of the lighted subject was high. In performance halls or studios of about 6 [m] height, there is no problem of illumination intensity in LED 144 [W] illuminator. Therefore, it is possible to replace the existing tungsten halogen 1 [KW] illuminator one to one.