共查询到19条相似文献,搜索用时 93 毫秒
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分析LED光源的原理、性能,介绍了隧道照明的特点,探讨了LED光源在隧道照明中的应用优势。通过对LED光源性能的探讨以及对隧道照明特点的分析可以看出,LED照明光源凭借其高光效、长寿命、低电耗、配光灵活等优异的照明特性,必将在隧道照明系统中发挥越来越重要的作用。 相似文献
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LED普通照明系统的思考 总被引:3,自引:0,他引:3
普通照明最关注的是光效和寿命。LED的理论光效很高,与其他光源相比具有潜在的优势。本文从照明系统光效展开讨论,计算并分析了LED照明系统的效率及其提高途径,并对LED应用于普通照明的前景进行了思考。 相似文献
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LED光源的应用及前景 总被引:5,自引:0,他引:5
LED是21世纪令人瞩目的光源,具有广阔的照明前景.该文首先对LED光源的原理、发展概况、特点等做了介绍,然后重点阐述其具体的应用及发展趋势,最后说明了LED在道路照明中的应用并做了总结展望. 相似文献
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分析了LED光源的原理、性能,介绍了隧道照明的特点,探讨了LED光源在隧道照明中的应用优势。指出LED光源具有良好的照明效果和超长免维护期,能有效降低运营成本,在隧道照明中将发挥越来越重要的作用。 相似文献
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Grillot P. N. Krames M. R. Zhao H. Teoh S.-H. 《Device and Materials Reliability, IEEE Transactions on》2006,6(4):564-574
Both fixed current density and variable current density stress conditions are used to study light output degradation of (AlxGa1-x)0.5In0.5P light-emitting diodes (LEDs) as functions of LED stress current and LED stress time. Quantification of the resulting data indicates that (AlxGa1-x)0.5In0.5P LED degradation, D, is a linear function of current density, J, and a logarithmic function of stress time, t, for stress times as long as 60 000 hours in duration. For stress times long enough and current densities high enough to saturate any short-term effects (AlxGa1-x)0.5In0.5P LED degradation is therefore quantified by the empirical equation D=D1 +D2J+(D3+D4J)ln(t), where D1 , D2, D3, and D4 are independent of LED stress current and LED stress time. Within the limits of the data presented here, this equation is shown to accurately describe light output degradation of individual LED lamps, the average degradation behavior of individual LED wafers, and the average degradation behavior of a distribution of multiple LED wafers. The resulting expression may thus provide helpful guidance in quantifying the tradeoff between LED flux and LED degradation, both of which depend linearly on current density 相似文献