• Title, Summary, Keyword: LED lighting

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A Study on Development of LED Lighting Module and Control System for Plant Growth (식물 성장용 LED조명 모듈 및 제어 시스템 개발에 관한 연구)

  • Lee, Seung Min;Lee, Wan Bum
    • Journal of the Semiconductor & Display Technology
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    • v.18 no.4
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    • pp.105-109
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    • 2019
  • LED lighting is used as artificial lighting for plant growth because it has high light efficiency and can radiate light of various wavelengths. In this paper, we have developed new structure LED lighting module to improve the performance of LED lighting for plant growth and proposed a lighting control system that can be controlled wirelessly. The proposed LED lighting module was fabricated using optical lens applied to tunnel light and simulated using Relux program. Results of simulation, we confirmed that the light distribution and average illuminance of the proposed lighting were improved. LED lighting control system was developed to wirelessly control R, G, B, W LED lighting according to plant type and growing season. Therefore, it is expected to provide the optimal lighting environment for plant growth and contribute to the improvement of farm productivity and convenience.

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LED.신광원 조명기술의 동향과 특성

  • Hwang, M.K.;Shin, S.W.;Lee, Se-Hyeon;Roh, J.Y.;Choi, S.J.;Seo, J.J.;Lee, J.G.;Yang, S.Y.
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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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.

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A Study on LED Lighting Environment of Asians and Westerners by Behaviors in Residential Space (동.서양인의 주거공간 행태에 따른 LED조명환경)

  • Yang, Jung-Soon
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.27 no.12
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    • pp.16-27
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    • 2013
  • This study describes the difference of lighting directing techniques of between asian and westerner in the residential space, and presents the LED lighting environment according to the residents' behaviors. This study was conducted with Koreans, European and North Americans, and the space range was limited to the living room where the various activities occur. The data of the desired LED lighting environment is drawn through lighting technique, illumination color temperature and illuminance variation of LED in living room, and the detailed study results are as follows ; First, the lighting in living space should be made with considering the various behaviors because the expected level according to consideration or not of behavior makes much difference. Second, the comfortably feeling LED lighting environments that are lighting technique, illumination color temperature and illuminance variation, are different between Koreans and North Americans, but Koreans and European feel comfortable under the similar LED lighting environments. Third, the data for the comfortable LED lighting environments is established according to the various residents' behaviors, which are watching TV, reading, studying, relaxing, chatting, entertaining guests. And then, the established LED lighting environments are analyzed with characteristic of behavior and classified according to lighting technique, illumination color temperature and illuminance variation for understanding their characteristic Few studies have been conducted to find out difference of the comfortably feeling LED lighting environment between asians and westerners. Therefore, in this study, it has a great significance to present the difference of the LED lighting environments that asians and westerners feel comfortable in living space, and to draw the characteristic of the expected lighting environment according to residents' behaviors.

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.

Study of Efficiency Test and Subjective Responses about Pendent Task Lighting System Using Phosphor Luminescent Film LED (광기여 필름 LED 팬던트 작업조명시스템 주관평가와 성능검증)

  • Cha, Kwang-Seok;Kim, Hway-Suh
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.23 no.3
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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.

A Case Study on the Role of LED Lighting at the Residential Space

  • Kim, Hye Young
    • International Journal of Advanced Culture Technology
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    • v.4 no.4
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    • pp.6-12
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    • 2016
  • Due to the development of technology, the modern people became to require not only more convenient life but also more comfortable and emotional environment, and individually suitable living environment is applied to residents in a residential space. Recently, while the LED lighting was variously attempted in every sector in society, it is needed to express differentiated lighting according to the resident's individual lifestyle in a residential space. In this paper, we analyze the role of LED lighting suitable for the digitalized lifestyle of the modern people through the relevant literature survey and case studies. The following results are obtained in summary of the rapidly changed recent trends of LED lighting. First, LED light replace existing light sources due to the advanced new technology in LED industry, and take the spotlight as a new lighting solution with the development of variable color LED bulb and the control technology by the wired and wireless communications. Second, LED lighting can be structurally applicable to every lighting device because of its compact and lightweight units, can produce abundant light environment by expression of variable colors and moods with the easy coloring and dimming control, can be reborn as emotional lighting design. Third, as recently practices are constantly appeared that integrate LED lights in the interior elements, such as object and furniture, and combine advanced LED lighting technology to new materials, the portion of illumination on the indoor environment is further increased after integrating the LED lighting and interior elements make boundaries of lighting and product architecture become blurred. LED lighting is confirmed that is being changed from the external functionality including material, shape, color, and etc. into the contextual emotion design including the lights expression, variable color, brightness control, making image, and etc. as the light source in current smart lighting era.

Emotional Lives of Students in the Classroom Space LED Fluorescent Lamp for Sensitivity Lighting (학생들의 생활공간인 교실에 감성조명 적용을 위한 LED 형광등 개발연구)

  • Han, Sang-Seok
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.9
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    • pp.3446-3450
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    • 2010
  • This study aims to make class lighting that gives classroom to stability and activity. For the purpose, we develop a emotional lighting LED using LED source which is a environment-friendly and the lighting fo the next generation. We composed emotional lighting LED as controller for color conversion, power supply for supplying LED lamp a stable power, PCB board for LED lamp and lamp and case. We developed designed emotional lighting LED and proved that the system works and one can get intended color.

A Study on the Psychological Responses by the change of Illuminance and Color temperature in LED (LED 광원의 색온도와 조도 변화에 따른 심리반응 연구)

  • Yi, Yon-Soo;Ha, Mi-Kyoung
    • Korean Institute of Interior Design Journal
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    • v.21 no.6
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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.

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A David Star Magic Square Algorithm for Efficient LED Control (효율적인 LED 제어를 위한 다윗 스타 마방진 알고리즘)

  • Lee, Kyung-Min;Lin, Chi-Ho
    • The Journal of The Institute of Internet, Broadcasting and Communication
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    • v.16 no.3
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    • pp.109-113
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    • 2016
  • In this paper, we propose efficient LED lighting control algorithm using a David star magic square. Such algorithms increases the power reduction, the heat efficiency and LED life cycle and the efficiency of the LED lighting control consumption. Lighting system using existing Magic square algorithm could be reduced to increase the heat efficiency of the LED because the LED lighting time of the reduced cross-lighting. but it has a limit to the lighting control. If should apply the this proposed algorithm, can reduces power consumption and increases LED life-cycle, heat efficiency of LED lighting module and efficiency of the lighting control of the LED. This paper proposed that algorithm is by using a David star magic square on the LED Matrix. Divided into twelve areas to move the pattern in constant time interval, to perform the cross rotation and inversion techniques to thereby light up. In this paper proposed algorithm of this paper was compared with existing Magic square approach. As a result, power consumption and heat-value and luminous flux was reduced as the conventional lighting system. And, the LED lighting control increase the efficiency.

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.