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ID:43445736
大小:762.98 KB
页数:44页
时间:2019-10-02
《LED照明灯的设计制作-毕业论文》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、基于节能的需要以及人们对照明质量要求的不断提高,半导体照明光源以其高效节能、长寿命、色彩丰富和坏保等特点受到了人们的广泛关注。大功率发光二极管作为半导体照明的代表,其性能近来提高很快,发光效率已超过501m/W,有望取代白炽灯、荧光灯和高压放电等传统光源,成为人类照明史上的第四代照明光源。目前大功率LED应用于通用照明上还存在着一些问题需解决,比如过高的封装热阻和合适的测试方法等。本文研究了大功率LED光源的组装测试方法,对制作中出现的问题进行了分析和讨论,并提出了改善大功率LE与D散热性能的建议。文章首先论述了LED封装与组装技术的发展,对多芯片封装技术在LED照明光源
2、上的应用作了探讨。并实际制作了一个由3个由大功率LED串联的照明灯,并与传统的白炽灯和荧光灯进行了比较。实验测试结果表明,组装的LED光源的发光量、发光效率均己经超过口炽灯,但其性能述不够稳定。单纯采用小功率高亮度LED或大功率LED制备的光源存在着光通量低、成本过高和散热不理想、能耗高等方面的问题,而高亮度LED与大功率LED混合组装的光源则在发光效率、成木以及散热等方面有相对的优势,可应用于室内辅助照明等场合。关键词:半导体照明,大功率发光二极管,组装,测试方法,热管理AbstractWiththedemandofpowersavingandtherequiremen
3、tforhigherilluminationquality,semiconductorlightingsourceshavebeenattractiveforitsexcellentcharacteristics:highefficiency,lowpowerconsumption,longsourcelife,colorrichnessandenvironmentfriendlessetc.Astherepresentativeofsemiconductorillumination,theperformanceofhighpowerLightEmittingDiodes
4、(LED)improvesquicklyresentyearsanditsluminanceefficiencyhassurpassed501m/W.ThushighpowerLEDwillbecomethefourthgenerationlightingsourcereplacingincandescent,fluorescentandhighintensitydischarge(HID)lamp・OtherwisesomekeyissuesshouldbesolvedbeforehighpowerLEDswidelyapplicationingeneralillumi
5、nationmarket,suchaspackageheatmanagementandsuitablemeasurementmethod.ThisthesisfocusesonhighpowerLEDlightingsourcesandresearchestheirassemblyandmeasurementprocess.Consequently;weanalyzeanddiscusstheproblemsfoundinthisprocess.Finallythesuggestionisproposedtoimprovethermaldissipationforhigh
6、powerLED.ThedevelopmentofLEDpackageandassemblytechnologyisdiscussed,especiallyontheapplicationofmultichippackagetechniqueforLEDlightingsources.Andtheactualproductionofa3byhigh-powerLEDlightsseries・Andwiththetraditionalincandescentandfluorescentlampsarecompared・TestresultsshowthatLEDlights
7、ourceassemblyoflight-emittingvolume,light-emittingefficiencythanincandescent,butitsperformancewasnotenoughstability.ComparingwiththehomogeneouscombinationoflowpowerhighbrightnessLEDs(HB-LEDs)orhighpowerLEDs,thehybridcombinationofHB-LEDs/highpowerLEDshashigherluminou
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