白小姐四肖必选一肖

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LED封装的取光效率分析


来源:新世纪LED论坛    时间:2016-07-08    【字体:  

3528白光常规一般是支架式,采用环氧树脂封装,功率较小,整体发光光通量不大,亮度高的也只能作为一些特殊使用。随着技术和封装技术的发展,顺应照明领域对高光通量 LED产品的需求,功率型LED逐步走入市场。这种功率型的LED一般是将发光芯片放在散热热沉上,上面装配光学透镜以达到一定光学空间分布,透镜内部填充低应力柔性硅胶。

GONGLVXINGLEDYAOZHENZHENGJINRUZHAOMINGLINGYU,SHIXIANJIATINGRICHANGZHAOMING,QIYAOJIEJUEDEWENTIHAIYOUHENDUO,QIZHONGZUIZHONGYAODEBIANSHIFAGUANGXIAOLV。MUQIANSHICHANGSHANGGONGLVXINGLEDBAODAODEZUIGAOLIU MINGXIAOLVZAI50lm/WZUOYOU,HAIYUANDABUDAOJIATINGRICHANGZHAOMINGDEYAOQIU。WEILETIGAOGONGLVXINGLEDFAGUANGXIAOLV,YIFANGMIANQIFAGUANGXINPIANDEXIAOLVYOUDAITIGAO;LINGYIFANGMIAN,GONGLVXINGLEDDEFENG ZHUANGJISHUYEXUJINYIBUTIGAO,CONGJIEGOUSHEJI、CAILIAOJISHUJIGONGYIJISHUDENGDUOFANGMIANRUSHOU,TIGAOCHANPINDEFENGZHUANGQUGUANGXIAOLV。

一、影响取光效率的封装要素

1.散热技术

DUIYUYOUPNJIEZUCHENGDEFAGUANGERJIGUAN,DANGZHENGXIANGDIANLIUCONGPNJIELIUGUOSHI,PNJIEYOUFARESUNHAO,ZHEIXIERELIANGJINGYOUZHANJIEJIAO、GUANFENGCAILIAO、RECHENDENG,FUSHEDAOKONGQIZHONG,ZAIZHEIGEGUO CHENGZHONGMEIYIBUFENCAILIAODOUYOUZUZHIRELIUDEREZUKANG,YEJIUSHIREZU,REZUSHIYOUQIJIANDECHICUN、JIEGOUJICAILIAOSUOJUEDINGDEGUDINGZHI。SHEFAGUANGERJIGUANDEREZUWEIRth(℃/W),REHAOSANGONGLV WEIPD(W),CISHIYOUYUDIANLIUDERESUNHAOERYINQIDEPNJIEWENDUSHANGSHENGWEI:

白小姐四肖必选一肖 T(℃)=Rth×PD。

PN结结温为:

TJ=TA+ Rth×PD

QIZHONGTAWEIHUANJINGWENDU。YOUYUJIEWENDESHANGSHENGHUISHIPNJIEFAGUANGFUHEDEJILVXIAJIANG,FAGUANGERJIGUANDELIANGDUJIUHUIXIAJIANG。TONGSHI,YOUYURESUNHAOYINQIDEWENSHENGZENGGAO,FAGUANGERJIGUANLIANG DUJIANGBUZAIJIXUSUIZHEDIANLIUCHENGBILITIGAO,JIXIANSHICHUREBAOHEXIANXIANG。LINGWAI,SUIZHEJIEWENDESHANGSHENG,FAGUANGDEFENGZHIBOZHANGYEJIANGXIANGZHANGBOFANGXIANGPIAOYI,YUE0.2-0.3nm/℃,ZHEIDUIYUTONGGUO YOULANGUANGXINPIANTUFUYAGHUNHEDEDAODEBAISELEDLAISHUO,LANGUANGBOZHANGDEPIAOYI,HUIYINQIYUYINGGUANGFENJIFABOZHANGDESHIPEI,CONGERJIANGDIDEZHENGTIFAGUANGXIAOLV,BINGDAOZHIBAIGUANGSE WENDEGAIBIAN。

白小姐四肖必选一肖 DUIYUGONGLVFAGUANGERJIGUANLAISHUO,QUDONGDIANLIUYIBANDOUWEIJIBAIHAOANYISHANG,PNJIEDEDIANLIUMIDUFEICHANGDA,SUOYIPNJIEDEWENSHENGFEICHANGMINGXIAN。DUIYUFENGZHUANGHEYINGYONGLAISHUO,RUHEJIANGDICHAN PINDEREZU,SHIPNJIECHANSHENGDERELIANGNENGJINKUAIDESANFACHUQU,BUJINKETIGAOCHANPINDEBAOHEDIANLIU,TIGAOCHANPINDEFAGUANGXIAOLV,TONGSHIYETIGAOLECHANPINDEKEKAOXINGHESHOUMING。WEILEJIANGDICHANPINDEREZU, SHOUXIANFENGZHUANGCAILIAODEXUANZEXIANDEYOUWEIZHONGYAO,BAOKUORECHEN、ZHANJIEJIAODENG,GECAILIAODEREZUYAODI,JIYAOQIUDAOREXINGNENGLIANGHAO。QICIJIEGOUSHEJIYAOHELI,GECAILIAOJIANDEDAOREXINGNENGLIANXUPIPEI,CAILIAOZHI JIANDEDAORELIANJIELIANGHAO,BIMIANZAIDAORETONGDAOZHONGCHANSHENGSANREPINGJING,QUEBAORELIANGCONGNEIDAOWAICENGCENGSANFA。TONGSHI,YAOCONGGONGYISHANGQUEBAO,RELIANGANZHAOYUXIANSHEJIDESANRETONGDAOJISHIDESANFACHUQU。

2.填充胶的选择

根据折射定律,光线从光密介质入射到光疏介质时,当入射角达到一定值,即大于等于临界角时,会发生全发射。以GaN蓝色芯片来说,GaN材料的折射率是2.3,当光线从晶体内部射向空气时,根据折射定律,临界角θ0=sin-1(n2/n1)。

QIZHONGn2DENGYU1,JIKONGQIDEZHESHELV,n1SHIGaNDEZHESHELV,YOUCIJISUANDEDAOLINJIEJIAOθ0YUEWEI25.8DU。ZAIZHEIZHONGQINGKUANGXIA,NENGSHECHUDEGUANGZHIYOURU SHEJIAO≤25.8DUZHEIGEKONGJIANLITIJIAONEIDEGUANG,JUBAODAO,MUQIANGaNXINPIANDEWAILIANGZIXIAOLVZAI30%-40%ZUOYOU,YINCI,YOUYUXINPIANJINGTIDENEIBUXISHOU,NENGSHECHUDAOJINGTIWAI MIANGUANGXIANDEBILIHENSHAO。JUBAODAO,MUQIANGaNXINPIANDEWAILIANGZIXIAOLVZAI30%-40%ZUOYOU。TONGYANG,XINPIANFACHUDEGUANGYAOTOUGUOFENGZHUANGCAILIAO,CHUANSONGDAOKONGJIAN,YEYAOKAOLVCAILIAODUIQUGUANGXIAOLVDE YINGXIANG。

SUOYI,WEILETIGAOLEDCHANPINFENGZHUANGDEQUGUANGXIAOLV,BIXUTIGAOn2DEZHI,JITIGAOFENGZHUANGCAILIAODEZHESHELV,YITIGAOCHANPINDELINJIEJIAO,CONGERTIGAOCHANPINDEFENGZHUANGFAGUANGXIAOLV。TONG SHI,FENGZHUANGCAILIAODUIGUANGXIANDEXISHOUYAOXIAO。WEILETIGAOCHUSHEGUANGDEBILI,FENGZHUANGDEWAIXINGZUIHAOSHIGONGXINGHUOBANQIUXING,ZHEIYANG,GUANGXIANCONGFENGZHUANGCAILIAOSHEXIANGKONGQISHI,JIHUSHICHUIZHISHEDAOJIEMIAN,YINERBUZAICHAN SHENGQUANFANSHE。

3.反射处理

FANSHECHULIZHUYAOYOULIANGFANGMIAN,YISHIXINPIANNEIBUDEFANSHECHULI,ERSHIFENGZHUANGCAILIAODUIGUANGDEFANSHE,TONGGUONEI、WAILIANGFANGMIANDEFANSHECHULI,LAITIGAOCONGXINPIANNEIBUSHECHUDEGUANGTONGBILI,JIANSHAO XINPIANNEIBUXISHOU,TICHENGPINDEFAGUANGXIAOLV。CONGFENGZHUANGLAISHUO,GONGLVXINGLEDTONGCHANGSHIJIANGGONGLVXINGXINPIANZHUANGPEIZAIDAIFANSHEQIANGDEJINSHUZHIJIAHUOJIBANSHANG,ZHIJIASHIDEFANSHEQIANGYIBANSHICAIQU DIANDUFANGSHITIGAOFANSHEXIAOGUO,ERJIBANSHIDEFANSHEQIANGYIBANSHICAIYONGPAOGUANGFANGSHI,YOUTIAOJIANDEHAIHUIJINXINGDIANDUCHULI,DANYISHANGLIANGZHONGCHULIFANGSHISHOUMOJUJINGDUJIGONGYIYINGXIANG,CHULIHOUDEFANSHEQIANGYOUYIDING DEFANSHEXIAOGUO,DANBINGBULIXIANG。MUQIANGUONEIZHIZUOJIBANSHIDEFANSHEQIANG,YOUYUPAOGUANGJINGDUBUZUHUOJINSHUDUCENGDEYANGHUA,FANSHEXIAOGUOJIAOCHA,ZHEIYANGDAOZHIHENDUOGUANGXIANZAISHEDAOFANSHEQUHOUBEIXISHOU,WUFAAN YUQIDEMUBIAOFANSHEZHICHUGUANGMIAN,CONGERDAOZHIZUIZHONGFENGZHUANGHOUDEQUGUANGXIAOLVPIANDI。

白小姐四肖必选一肖 WOMENJINGGUODUOFANGMIANDEYANJIUHESHIYAN,YANZHICHENGYIZHONGJUYOUZIZHUZHISHICHANQUANDESHIYONGYOUJICAILIAOTUCENGDEFANSHECHULIGONGYI,TONGGUOZHEIZHONGGONGYICHULI,SHIDEFANSHEDAOZAIPIANQIANGNEIDEGUANGXIANXISHOU HENSHAO,NENGJIANGDABUFENSHEDAOQISHANGMIANDEGUANGXIANFANSHEZHICHUGUANGMIAN。ZHEIYANGCHULIHOUDECHANPINQUGUANGXIAOLVYUCHULIZHIQIANXIANGBIKETIGAO30%-50%。WOMENMUQIAN1WBAIGUANGGONGLVLEDDEGUANGXIAOKEDA 40-50lm/W(ZAIYUANFANGPMS-50GUANGPUFENXICESHIYIQISHANGCESHIJIEGUO),HUODELEHENHAODEFENGZHUANGXIAOGUO。

4.荧光粉选择与涂覆

白小姐四肖必选一肖 DUIYUBAISEGONGLVXINGLEDLAISHUO,FAGUANGXIAOLVDETIGAOHAIYUYINGGUANGFENDEXUANZEHEGONGYICHULIYOUGUAN。WEILETIGAOYINGGUANGFENJIFALANSEXINPIANDEXIAOLV,SHOUXIANYINGGUANGFENDEXUANZEYAOHESHI,BAOKUO JIFABOZHANG、KELIDUDAXIAO、JIFAXIAOLVDENG,XUQUANMIANKAOHE,JIANGUGEGEXINGNENG。QICI,YINGGUANGFENDETUFUYAOJUNYUN,ZUIHAOSHIXIANGDUIFAGUANGXINPIANGEGEFAGUANGMIANDEJIAOCENGHOUDUJUNYUN,YIMIANYINHOUDUBUJUN ZAOCHENGJUBUGUANGXIANWUFASHECHU,TONGSHIYEKEGAISHANGUANGBANDEZHILIANG。

二、结论

LIANGHAODESANRESHEJIDUITIGAOGONGLVXINGLEDCHANPINFAGUANGXIAOLVYOUZHEXIANZHEDEZUOYONG,TONGSHIYESHIQUEBAOCHANPINSHOUMINGHEKEKAOXINGDEQIANTI。ERSHEJILIANGHAODECHUGUANGTONGDAO,ZHEILI ZHEZHONGZHIFANSHEQIANG、TIANCHONGJIAODENGDEJIEGOUSHEJI、CAILIAOXUANZEHEGONGYICHULI,KEYIYOUXIAOTIGAOGONGLVXINGLEDDEQUGUANGXIAOLV。DUIGONGLVXINGBAIGUANGLEDLAISHUO,YINGGUANGFENDEXUANZEHEGONGYISHEJI,DUIGUANGBAN DEGAISHANHEFAGUANGXIAOLVDETIGAOYEZHIGUANZHONGYAO。


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