欢迎来到天天文库
浏览记录
ID:29973627
大小:19.58 KB
页数:11页
时间:2018-12-25
《led灯珠寿命测试报告》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、为了适应公司新战略的发展,保障停车场安保新项目的正常、顺利开展,特制定安保从业人员的业务技能及个人素质的培训计划led灯珠寿命测试报告 目录 摘要:·······························2Abstract:······························31引言·····························42LED定义、其发光原理及其特点···················4 LED定义及发光原理······················4
2、LED照明特点·························53LED灯具寿命····························7 LED寿命长的原因·······················7 影响LED灯具寿命的因素····················8目的-通过该培训员工可对保安行业有初步了解,并感受到安保行业的发展的巨大潜力,可提升其的专业水平,并确保其在这个行业的安全感。为了适应公司新战略的发展,保障停车场安保新项目的正常、顺利开展,特制定安保从业人员的业务技能及个人素质
3、的培训计划 判断LED失效的依据······················9 如何衡量LED的寿命······················104与LED寿命相关的几个因素·····················12 LED的光衰及其影响因素····················12 LED的结温及其影响因素····················13 LED器件的最高结温及其影响因素················14 LED的热阻及减小其热阻的途径················
4、·155LED老化实验····························16 LED的老化及其寿命测试····················16 大功率LED封装结构·····················17 热阻(Rθ)的测量方法···················17目的-通过该培训员工可对保安行业有初步了解,并感受到安保行业的发展的巨大潜力,可提升其的专业水平,并确保其在这个行业的安全感。为了适应公司新战略的发展,保障停车场安保新项目的正常、顺利开展,特制定安保从业人员的业务技
5、能及个人素质的培训计划 LED结温及光通量的测量····················19 影响实验的几个因素······················21 实验结果讨论·························22结论·······························26谢辞·······························27 【参考文献】·····························28 LED发光寿命测试 摘要:假如不考虑电源和驱动的故
6、障,LED的寿命终止会表现为它的光衰,目的-通过该培训员工可对保安行业有初步了解,并感受到安保行业的发展的巨大潜力,可提升其的专业水平,并确保其在这个行业的安全感。为了适应公司新战略的发展,保障停车场安保新项目的正常、顺利开展,特制定安保从业人员的业务技能及个人素质的培训计划 也就是说时间长了,其亮度会越来越暗,直到最后熄灭为止。LED的寿命主要取决于LED芯片的质量、芯片的设计和芯片的材料。直接影响LED寿命的关键因素有两个:一是驱动电流的变化即达到某个阈值以后,启动LED的电流越高,发光发热就越多
7、;二是工作环境温度:温度越高,出光就越少。此外,LED灯具的安装及固定方式对其寿命也有很大的影响。 本文主要通过实验测量LED的光通量及结温,根据LED发光寿命与光通量及结温的关系推导出LED的发光寿命。 关键词:LED光衰结温热阻寿命 LEDLifetimeTest Abstract:Ifwedon’tputthebreakdownofpowersourceanddrivingmechanisminto consideration,theterminationofaLED’slifetime
8、willbelightdecline,in otherwords,afteralongtime,thelight’sintensewillbeweakerandweaker, andthelightwillbeoutatlast.TheLED’slifetimereliesonthequality, designandmaterialofLED’schip.Therearetwofactorsinfluencingthe LED’s
此文档下载收益归作者所有