• Title/Summary/Keyword: Efficacy Lighting

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Analysis of Property for White and RGB Multichip LED Luminaire (백색 LED와 RGB 멀티칩 LED 조명장치의 특성 분석)

  • Jeong, Byeong-Ho;Kim, Nam-Oh;Kim, Deog-Goo;Oh, Geum-Gon;Cho, Geum-Bae;Lee, Kang-Yoen
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.23 no.12
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    • pp.23-30
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    • 2009
  • LEDs are increasingly used for many applications including automotive, aviation, display, transportation and special lighting applications. Generally, the RGB multichip LED luminaire applied to signboard, emotional lighting system and display device and the white LED luminaire applied to general lighting system. white LED spectra for general lighting should be designed for high luminous efficacy as well as good color rendering. This paper describes characteristics of LED luminaire white LED and RGB multichip LED. Two type of LED luminaire prototype used experiment physical, electrical and optic test and performance analyzed. RGB multi-chip and phosphor-type white LED luminaire were analyzed by experiment on their color characteristics and luminous efficacy of radiation, distribution curve, and electrical characteristics. Research work is in progress to develop an improved performance for optic and electrical works well for two type of LED luminaires.

Study on the heat-resistance characteristic for PLS(Plasma Light System) (PLS(Plasma Light System)의 내열방사 특성 연구)

  • Shin, Sang-Wuk;Lee, Se-Hyun;Cho, Mee-Ryoung;Lim, Jong-Min;Hwang, Myung-Keun
    • Proceedings of the KIEE Conference
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    • 2004.11a
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    • pp.293-295
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    • 2004
  • PLS(Plasma Light System) is one of the electrodeless lamp discharged by micro wave. In this new lamp has high efficacy and CRI(Color Rendering Index). It is mainly composed of microwave part and optical part. Microwave parts consist of magnetron, wave-guide and cavity-mesh, while optical parts consist of bulb, mirror and reflector. In this paper, we studied experimentally the heat-resistance and temperature distribution characteristics of bulb in PLS.

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An Implementation of Home network Control Protocol(HnCP) and It's Application to an Intelligent lighting system. (저속 전력선통신 기반의 Home network Control Protocol(HnCP) 구현 및 지능형 조명에의 적용)

  • Kim, Woo-Young;Park, Won-Jang;Jeung, Bum-Jin;Lee, Young-Il
    • Proceedings of the KIEE Conference
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    • 2004.11c
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    • pp.403-405
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    • 2004
  • This paper describes an implementation of Home network Control Protocol(HnCP) and it's application to an Intelligent lighting system. The HnCP was announced by korea PLC forum in June 2003 to provide a network protocol for PLC based home appliances. The HnCP master and HnCP slaves were implemented using XPLC30 which is an SOC with ARM9 core. The efficacy of the developed HnCP network modules were shown by applying them to a intelligent lighting system composed of dimmable fluorescent lamps. An extended message set was proposed for the intelligent lighting system and we proposed some directions for the future development of HnCP.

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The Study of Measurement Method for an electrodeless lamp (무전극 램프의 광특성 측정방식에 대한 고찰)

  • Lee, Se-Hyun;Cho, Mee-Ryoung;Shin, Sang-Wuk;Hwang, Myung-Keun
    • Proceedings of the KIEE Conference
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    • 2003.10a
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    • pp.68-71
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    • 2003
  • In this paper, We have investigated the luminous flux, luminous efficacy, spectral energy distribution, colour rendering index, correlated colour temperature of electrodeless QL lamp system as a center method of measurement and side method of measurement. A result of measurement is that center method of measurement and side method of measurement is almost similar. Therefore, Sample that didn't measured because of big size and heavy weight can be measured by center method of measurement.

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A Study on AC-Driven LED Lighting System with High Efficacy, and Heterogeneous power (고 효율, 이종 전원 지원 교류 구동 발광 다이오드 조명 연구 장치 개발)

  • Lim, Jun-hyung;Kim, Young-kil
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2017.05a
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    • pp.555-558
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    • 2017
  • In this paper, we designed a power supply AC LED driving device which can display uniform power consumption and light efficiency even when AC power of different size is applied. By setting input voltages and deviations of different sizes, it is confirmed that the electric light characteristics are the same at two input voltages. In addition, according to peak voltage of AC power, improper lighting caused in specific LED section is improved, and LED lighting of all sections is implemented in all commercial AC input voltage.

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Electromagnetic Analysis of Induction Coil for Electrodeless Fluorescent lamps (무전극 형광램프를 위한 유도코일의 전자계 해석)

  • 김광수;이종찬;박대희;박성목
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2002.11a
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    • pp.187-190
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    • 2002
  • The Electrodeless lamp is intended as a high efficacy replacement for the incandescent reflector lamp in many applications. but Increasing awareness of electromagnetic compatibility(EMC) issues in lighting application, the problems of interference generation by electrodeless fluorescent lighting system have been highlighted. In this paper, Maxwell 2D finite element analysis program(Ansoft) is used to obtain electromagnetic properties associated with the coil and nearby structures. and also evaluated Flux B, H by changing the input current.

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Predicting Daylight Illuminances on Vertical Surfaces Using Luminous Efficacy of SolarIr radiance (일사의 발광효율을 이용한 수직면 주광조도 예측에 관한 연구)

  • Yoon, Kap-Chun;Kim, Kang-Soo
    • Journal of the Korean Solar Energy Society
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    • v.34 no.1
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    • pp.19-27
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    • 2014
  • Exterior vertical illuminance is an important factor for lighting control. But, there are not many researches about the exterior illuminance on a vertical surface. In this study, we predicted the exterior illuminance on a vertical surface using vertical luminous efficacy. First, we calculated the vertical luminous efficacy according to the sky clearness category. And we performed the statistical analysis of the measured and the calculated illuminance with luminous efficacy. The MBE and RMSE of the predicted exterior illuminance were-1.2% and 15.5%, respectively. Second, the annual illuminance on a vertical surface calculated with the luminous efficacy and the short-term measured solar irradiance was suggested in this study.

Manufacturing of Cs3Sb Photocathode in Atmospheric Conditions

  • Jeong, Hyo-Soo
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.27 no.10
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    • pp.653-656
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    • 2014
  • $Cs_3Sb$ photocathode was formed by newly developed process and successive in-situ lighting devices were fabricated in a process chamber. R, G, and B phosphors were applied on the anode plate, respectively. Major parameters such as brightness, power consumption, and efficacy were measured. The wavelength of LED excitation source was 450 nm. Both high power and low power modes were applied in the measurement. Measurement values were clearly differentiated by the voltage application modes. The measured values of each parameter was good enough to be applied for general lighting source. The results showed that $Cs_3Sb$ photocathode formed in atmospheric conditions was functioning as good as the photocathode formed in UHV conditions, and thus it could be applied to advanced lighting devices.

Evaluation of White LED Package Characteristics in Remote Phosphor Structure Depending on Phosphor Coatings (형광체 코팅에 따른 Remote Phosphor 구조의 백색 LED 패키지 특성 평가)

  • Jeong, Hee-Suk;Lee, Jung-Geun;Kang, Han-Lim;Hwang, Myung-Keun;Lee, Mi-Jae;Kim, Jin-Ho;Chae, Yoo-Jin;Lee, Young-Sik
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.26 no.4
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    • pp.330-334
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    • 2013
  • We developed a package of remote phosphor structure having blue LED chips and phosphors physically separated, and the characteristics were evaluated according to different classifications of phosphor coatings. Remote phosphor was produced by screen printing coating on glass substrate with phosphor content rated paste and heat treatment. After mounting Remote phosphor, which has been classified according to number of coatings, on top of blue LED chips, luminous flux, luminous efficacy, CCT and CRI were measured. The measurement results showed the most suitable characteristics of white LED package as a general light source when the content rate of phosphor in Remote phosphor was 80 wt.% with 3 layers of coatings and thickness over $12{\mu}m$.