• 제목/요약/키워드: Efficiency of lighting

검색결과 510건 처리시간 0.025초

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

  • 이경민;인치호
    • 한국인터넷방송통신학회논문지
    • /
    • 제16권3호
    • /
    • pp.109-113
    • /
    • 2016
  • 본 논문에서는 LED 조명 모듈의 소비전력 절감, 램프의 수명 및 열효율 과 점등 제어 효율성을 높인 다윗 스타 마방진 이용한 효율적인 LED 제어 알고리즘을 제안하다. 기존의 마방진 알고리즘 이용한 점등 방식은 LED의 점등 시간이 줄어들고 교차 점등되기 때문에 그만큼의 발열이 줄어들어 LED의 효율을 높일 수 있었으나 점등 제어를 하는데 한계를 가지고 있다. 제안하는 알고리즘을 적용할 경우에는 LED 조명 모듈의 소비전력 절감과 수명 및 열효율 높이는 동시에 LED의 점등 제어의 효율성을 높일 수 있다. 본 논문이 제안하는 알고리즘은 LED Matrix에 변형 마방진을 이용하여 12개의 구역으로 나누어 완전대칭 되는 패턴을 일정시간 간격으로 이동, 회전 및 반전 기법을 교차 수행하여 패턴을 점등을 하게 된다. 본 논문이 제안하는 알고리즘을 수행하여 기존의 마방진을 이용한 점등 방식과 비교한 결과, 조명의 광속과 소비전력 그리고 발열량의 효율성은 기존 마방진을 이용한 LED 점등방식과 동일하고 제어의 효율성을 높일 수 있었다.

터널조명용 광원의 경제성 비교 (The Comparison of the Economical Efficiency of Light Sources for a Tunnel Lighting)

  • 이진우
    • 조명전기설비학회논문지
    • /
    • 제25권2호
    • /
    • pp.32-42
    • /
    • 2011
  • In this paper to compare the economical efficiency of light sources for a tunnel lighting, we define a model tunnel and design tunnel lighting. And to examine economical efficiency of various tunnel lightings we compare the lighting expenses of tunnels. The results shows high pressure sodium lamps are more economical than fluorescent lamps.

A Reconfigurable Lighting Engine for Mobile GPU Shaders

  • Ahn, Jonghun;Choi, Seongrim;Nam, Byeong-Gyu
    • JSTS:Journal of Semiconductor Technology and Science
    • /
    • 제15권1호
    • /
    • pp.145-149
    • /
    • 2015
  • A reconfigurable lighting engine for widely used lighting models is proposed for low-power GPU shaders. Conventionally, lighting operations that involve many complex arithmetic operations were calculated by the shader programs on the GPU, which led to a significant energy overhead. In this letter, we propose a lighting engine to improve the energy-efficiency by supporting the widely used advanced lighting models in hardware. It supports the Blinn-Phong, Oren-Nayar, and Cook-Torrance models, by exploiting the logarithmic arithmetic and optimizing the trigonometric function evaluations for the energy-efficiency. Experimental results demonstrate 12.7%, 42.5%, and 35.5% reductions in terms of power-delay product from the shader program implementations for each lighting model. Moreover, our work shows 10.1% higher energy-efficiency for the Blinn-Phong model compared to the prior art.

고효율 반사갓을 이용한 등기구 저감효과 (Effect of Lighting Saving Using High Efficiency Reflector)

  • 조현경;김재철;정승복;임상국
    • 한국조명전기설비학회:학술대회논문집
    • /
    • 한국조명전기설비학회 2006년도 춘계학술대회 논문집
    • /
    • pp.148-153
    • /
    • 2006
  • This paper analyzes the effect of the energy saving and evaluates the economics using High Efficiency lighting. About 18 percent (17,000GWh) of total power demands in Korea m consumed i]l the lighting field. There isa lot of energy potential that can be saved because the power demand isolwer relatively than the others parts. The existing lighting that its length and electric energy are 32[mm] and 40[w] can alternate with high efficiency lighting which its length and electric energy are 26[mm] and 32[w]. Two Lightings is measuring the illumination and the electric energy and then are analyzed into the effect of the lighting saving by measurement.

  • PDF

빛의 조사기간으로 본 호기성 고율 안정조 프로세스의 영양물질 제거 (The Nutrients Removal in Aerobic High Rate Ponds Through the Lighting Period)

  • 공석기
    • 환경위생공학
    • /
    • 제11권1호
    • /
    • pp.83-91
    • /
    • 1996
  • It is not too much to say that the territorial inhabitants' concerns are wholly c concentrated on the environmental preservation-problem and development-problem in Korea given effect to the local self-government system. At a time like this I was studied the effect on nutrients removal through lighting period in aerobic high rate pond and we know that waste stabilization pond method is the most economical and energy saving wastewater treatment technology than others. At the results which was studied through operating the reactor-l artifically main-tained at a temperature, $25^{\circ}C$, a light intensity, 3000lux, and a lighting period, 24hrs and the reactor-2 artifically maintained at a tern야rature, $25^{\circ}C$ and a light intensity 3000lux, and a lighting period period, 12hrs, It has appeared for 24hrs.-lighting period -reactor-1 to be prior to the reactor-2. The attained results are that 1. reactor-1 is prior to reactor-2 on oxygen-generation 2. reactor-1 is prior to reactor-2 on algal production 3. COD removal efficiency, 90.76%, T-N removal efficiency, 80%, T-P removal e efficiency, 74.47 % in reactor-2, in reactor-1 COD removal efficiency, 94.85 %, T-N removal efficiency, 98.07%, T-P removal efficiency, 72.13% are, so the treatment efficiency of reactor-1 is more excellent than things of reactor-2 4. it appeared that the detention time is 8, 9days.

  • PDF

자계 공진 방식의 무선전력전송 장치를 이용한 교류 전력 직접 인가에 의한 LED 조명기기 효율에 관한 연구 (A Study on the Efficiency of LED Lighting Applied by Direct AC Power Using Magnetic Resonance Wireless Power Transfer System)

  • 박정흠
    • 조명전기설비학회논문지
    • /
    • 제27권10호
    • /
    • pp.15-20
    • /
    • 2013
  • In this paper, wireless power transfer system using the magnetic resonance was designed and applied to LED lighting for implementation of wireless lighting. This lighting was made by the converted DC driving type and the direct AC driving type. In the former, transferred AC power was rectified into DC and regulated to the specified voltage value, which leads to produce the loss at the rectifying and regulating circuit. In the latter, wireless-transferred AC power was directly applied to LED, which get rid of the loss derived from the additional circuit. For the efficiency-comparison between the former and the latter, the power at each stage was measured when the same optical output radiated from LED lighting part. The result revealed that the direct AC driving type had 18% higher efficiency than the DC driving type and confirmed that LED lighting using magnetic resonance wireless power transfer system can be efficient by direct AC power supply. And the direct AC driving type had the simple circuit structure and the simple LED lighting formation, so this can leads to various application.

Influence of Glass Tube Diameter in the Cold Cathode Fluorescent Lamps for 40-inch LCD-TVs

  • Lee, Min-Kyu;Lee, Kyoung-Ho;Han, Kyu-Hyeon;Lee, Jae-Wook
    • 한국정보디스플레이학회:학술대회논문집
    • /
    • 한국정보디스플레이학회 2009년도 9th International Meeting on Information Display
    • /
    • pp.707-710
    • /
    • 2009
  • As the inner diameter of CCFL is increased in the range of outer diameters 3~5 mm, the luminance efficiency is increased by the low power consumption. For the outer diameter 5 mm, the efficiency is linearly increased even at the range of a high current.

  • PDF

태양전지 이용을 위한 LED 조명 제어기 설계 (A Design of LED Lighting Controller for use of Solar Battery)

  • 김변곤;이옥재
    • 조명전기설비학회논문지
    • /
    • 제25권6호
    • /
    • pp.18-27
    • /
    • 2011
  • LED lighting because of high efficiency, long life, friendly environment, as a general lighting of the next generation, has been substituted for incandescent bulb and fluorescent lamp. The proposed system for use of solar battery is the intelligent controller for LED street lights which is improved the method of battery charging and charging efficiency in winter to extend battery life cycle, controlled lighting current according to SoC and in steps. Also, it is implemented emotional lighting which is controlled with the surrounding environment, by using colorful sub LED to take up 10[%] of a source of total light, white LED. As a lab results, the proposed system was implemented functions to adapt to the environmental changes, and improved the charging efficiency and battery life cycle.

주광량의 변화에 따른 LED조명 제어를 통한 에너지 절감량 분석에 관한 연구 (A Study on Energy Savings Analysis by Controling LED Lighting according to the Change of the Amount of Daylight)

  • 함원태;채수용;한수빈;김흥근;정학근
    • 한국태양에너지학회:학술대회논문집
    • /
    • 한국태양에너지학회 2012년도 춘계학술발표대회 논문집
    • /
    • pp.522-528
    • /
    • 2012
  • Currently, the energy consumption of electric lighting in an office building is accounted for more than 30% of the total energy consumption. In order to reduce the energy consumed by the indoor lighting, the daylight as a natural energy resource can play an important role in energy savings. The daylight can have positive impacts on improvement of work efficiency and productivity, and also make people feel more psychologically stable. Moreover, by using the daylight, we can definitely reduce the energy consumption in office buildings. Thus, the purpose of this study is to determine the LED dimming ratio depending on the ratio by calculating the amount of artificial illumination required according to the change of daylight by using the light simulation software that can quantify and visualize the performance of daylight. As a result, the energy savings could be obtained up to 30%.

  • PDF

Economic Evaluation of LED Luminaires for Tunnel Interior Zones

  • Cho, Sook-Hyun;Kim, Hoon
    • 조명전기설비학회논문지
    • /
    • 제27권11호
    • /
    • pp.7-13
    • /
    • 2013
  • There has been a need for the systematic evaluation of the economic efficiency between conventional fluorescent lamp lighting systems that have been used in tunnels and LED lighting systems. This study has evaluated basic tunnel lighting between the conventional fluorescent lighting systems and the LED lighting system using the evaluation tool of tunnel lighting by Life Cycle Cost (LCC) and using the economic efficiency evaluation method. In addition, the unit discount rate of the LED lighting system and the estimated increase in the price of electricity have made the estimated cost of LCC the same if two luminaires were used in the basic part of the tunnel.