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LED設計十大經典問答

點擊數:72052017-10-08 07:39:57

JINNIANLAI,LEDZHIZAOGONGYIDEBUDUANJINBUHEXINCAILIAO(DANHUAWUJINGTIHEYINGGUANGFEN)DEKAIFAHEYINGYONG,GEZHONGYANSEDECHAOGAOLIANGDULEDQUDELETUPOXINGJINZHAN,QIFAGUANGXIAOLVTIGAOLEJIN1000BEI,SEDUFANGMIANYISHIXIANLEKEJIANGUANGBODUANDESUOYOUYANSE,QIZHONGZUIZHONGYAODESHICHAOGAOLIANGDUBAIGUANGLEDDECHUXIAN,SHILEDYINGYONGLINGYUKUAYUEZHIGAOXIAOLVZHAOMINGGUANGYUANSHICHANGCHENGWEIKENENG。

江西快3 TONGGUOSHIDUONIANDUILEDSHEJIDEQIANXINYANJIUHEXUEXI。BENRENSHOUJILELEDYINGYONGSHEJIZHONGYIXIEJINGDIANXINGDEJICHUWENTIFENXIANGGEIDAJIA。QIZHONGSHEJIDAONEIRONGYOUDANGELEDDELIUMINGXIAOLVYUYONGLEDZUOGUANGYUANGOUCHENGDEDENGJUDELIUMINGXIAOLVYITONGFENXI,LEDDEJIEWENYUANLIJIJIEWENSHENGGAOHUIDUILEDCHANSHENGDEYINGXIANGWENTI,JINGDIANPOHUAIDEYUANLIYIJILIEJUYIXIELEIXINGDELEDRONGYISHOUJINGDIANPOHUAIDAOZHISHIXIAO,TANTAOLEDLUDENGFANGLEINENGYONGYIGEYAMINDIANZUDEWENTI,JIEDUSHEJIGAOPINZHILEDQUDONGDIANLUDEFANGFAHEXUANZEHESHEJILEDQUDONGDIANYUANSHIYAOKAOLVNAXIEYINSUDENGWENTI。

問:單個LED的流明效率與用LED作光源構成的燈具的流明效率有什么異同?

DA:ZHENDUIMOUYIGETEDINGDELED,JIASHANGGUIDINGDEZHENGXIANGPIANZHI,RUJIASHANGIF=20mAZHENGXIANGDIANLIUHOU(DUIYINGDEVF≈3.4V),CEDEDEFUSHEGUANGTONGLIANGΦ=1.2lm,ZEZHEGELEDDELIUMINGXIAOLVWEIη=1.2lm×1000/3.4V×20mA=1200/68≈17.6lm/W。XIANRAN,DUIDANGELED,RUSHIJIADEDIANGONGLVPe=VF×IF,NEIMEZAIZHEGEGONGLVXIACEDEDEFUSHEGUANGTONGLIANGZHESUANWEIMEIWADELIUMINGZHIJIWEIDANGELEDDELIUMINGXIAOLV。

江西快3 DANSHI,ZUOWEIYIGEDENGJU,BULUNLEDPNJIESHANGSHIJIJIASHANGDEGONGLVVF×IFSHIDUOSHAO,DENGJUDEDIANGONGLVZONGSHIDENGJUSHURUDUANKOUSONGRUDEDIANGONGLV,TABAOKUODIANYUANBUFEN(RUWENYAQI、WENLIUYUAN、JIAOLIUZHENGLIUCHENGZHILIUDIANYUANBUFENDENG)SUOXIAOHAODEGONGLV。DENGJUZHONG,QUDONGDIANLUDECUNZAISHITADELIUMINGXIAOLVBICESHIDANGELEDDELIUMINGXIAOLVYAOXIAJIANG。DIANLUSUNHAOYUEDA,LIUMINGXIAOLVYUEDI,YINCI,XUNZHAOYIZHONGGAOXIAOLVDELEDQUDONGDIANLUJIUXIANDEJIWEIZHONGYAO。

問:什么是LED的結溫?結溫升高會對LED造成什么影響?

DA:LEDJIBENJIEGOUSHIYIGEBANDAOTIDEPNJIE。DANGDIANLIULIUGUOLEDQIJIANSHI,PNJIEDEWENDUJIANGSHANGSHENG,YANGEYIYISHANGSHUO,JIUBAPNJIEQUDEWENDUDINGYIWEILEDDEJIEWEN。TONGCHANGYOUYUQIJIANXINPIANJUNJUYOUHENXIAODECHICUN,YINCIWOMENYEKEBALEDXINPIANDEWENDUSHIZHIWEIJIEWEN。

江西快3 DANGPNJIEDEWENDU(LIRUHUANJINGWENDU)SHENGGAOSHI,PNJIENEIBUDEZAZHIDIANLIJIAKUAI,BENZHENGJIFAJIASU。DANGBENZHENGJIFACHANSHENGDEFUHEZAILIUZIDENONGDUYUANYUANCHAOGUOZAZHINONGDUSHI,BENZHENGZAILIUZIDESHULIANGZENGDADEYINGXIANGJIAOZHIQIANYILVJIANXIAODEBANDAOTIDIANZULVBIANHUADEYINGXIANGGENGWEIYANZHONG,DAOZHINEILIANGZIXIAOLVXIAJIANG,WENDUSHENGGAOYOUDAOZHIDIANZULVXIAJIANG,SHITONGYANGIFXIA,VFJIANGDI。RUGUOBUYONGHENGLIUYUANQUDONGLED,ZEVFJIANGJIANGCUSHIIFZHISHUSHIZENGJIA,ZHEGEGUOCHENGJIANGSHILEDPNJIESHANGWENSHENGGENGJIAKUAI,ZUIZHONGWENSHENGCHAOGUOZUIDAJIEWEN,DAOZHILEDPNJIESHIXIAO,ZHESHIYIGEZHENGFANKUIDEEXINGGUOCHENG。

PNJIESHANGWENDUSHENGGAO,SHIBANDAOTIPNJIEZHONGCHUYUJIFATAIDEDIANZI/KONGXUEFUHESHICONGGAONENGJIXIANGDINENGJIYUEQIANSHIFASHECHUGUANGZIDEGUOCHENGFASHENGTUIHUA。ZHESHIYOUYUPNJIESHANGWENDUSHENGGAOSHI,BANDAOTIJINGGEDEZHENFUZENGDA,SHIZHENDONGDENENGLIANGYEFASHENGZENGJIA,DANGTACHAOGUOYIDINGZHISHI,DIANZI/KONGXUECONGJIFATAIYUEQIANDAOJITAISHIHUIYUJINGGEYUANZI(HUOLIZI)JIAOHUANNENGLIANG,YUSHICHENGWEIWUGUANGZIFUSHEDEYUEQIAN,LEDDEGUANGXUEXINGNENGTUIHUA。

江西快3 LINGWAI,PNJIESHANGWENDUSHENGGAOHUANHUIYINQIZAZHIBANDAOTIZHONGDIANLIZAZHILIZISUOXINGCHENGDEJINGGECHANGSHILIZINENGJILIEBIAN,NENGJIFENLIESHOUPNJIEWENDUDEYINGXIANG,ZHEJIUYIWEIZHUYOUYUWENDUYINGXIANGJINGGEZHENDONG,SHIQIJINGGECHANGDEDUICHENGXINGFASHENGBIANHUA,CONGERYINQINENGJIFENLIE,DAOZHIDIANZIYUEQIANSHICHANSHENGDEGUANGPUFASHENGBIANHUA,ZHEJIUSHILEDFAGUANGBOCHANGSUIPNJIEWENSHENGERBIANHUADEYUANYIN。

江西快3 ZONGSHANGSUOSHU,LENPNJIESHANGDEWENSHENGHUIYINQITADEDIANXUE、GUANGXUEHEREXUEXINGNENGDEBIANHUA,GUOGAODEWENSHENGHUANHUIYINQILEDFENGZHUANGCAILIAO(LIRUHUANYANG、YINGGUANGFENDENG)WULIXINGNENGDEBIANHUA,YANZHONGSHIHUIDAOZHILEDSHIXIAO,SUOYIJIANGDIPNJIEWENSHENG,SHIYINGYONGLEDDEZHONGYAOGUANJIANSUOZAI。

問:什么是靜電破壞?哪些類型的LED容易受靜電破壞導致失效?

DA:JINGDIANSHIJISHANGSHIYOUDIANHELEIJIGOUCHENG。RENMENZAIRICHANGSHENGHUOZHONG,TEBIEZAIGANZAOTIANQIHUANJINGZHONG,DANGYONGSHOUQUCHUMOMENCHUANGLEIWUPINSHIHUIGANJUE“CHUDIAN”,ZHEJIUSHIMENCHUANGLEIWUPINJINGDIANJILEIDAOYIDINGCHENGDUSHIDUIRENTIDE“FANGDIAN”。DUIYUYANGMAOZHIPIN、NILONGHUAXIANWUPIN,JINGDIANJILEIQILAIDEDIANYAKEGAODAYIWANDUOFUTE,DIANYASHIFENGAO,DANJINGDIANGONGLVBUDA,BUHUIWEIXIESHENGMING,RANERDUIYUMOUXIEDIANZIQIJIANQUEKEYIZHIMING,ZAOCHENGQIJIANSHIXIAO。

LEDZHONGYONGGNJIGOUCHENGDEQIJIAN,YOUYUSHIKUANJINDAIBANDAOTICAILIAO,TADEDIANZULVJIAOGAO,DUIYUInGaN/AlGaN/GaNDESHUANGYIZHIJIELANSEGUANGLED,QIInGaNDEYOUYUANCENGDEHOUDUYIBANZHIYOUJISHINAMI,ZAIYOUYUZHEZHONGLEDDELIANGGEZHENG、FUDIANJIZAIXINPIANTONGYIMIANSHANG,ZHIJIANJULIHENXIAO,RUOLIANGDUANJINGDIANDIANHELEIJIDAOYIDINGZHISHI,ZHEYIJINGDIANDIANYAHUIJIANGPNJICHUAN,SHIQILOUDIANZENGDA,YANZHONGSHIPNJIEJICHUANDUANLU,LEDSHIXIAO。

ZHENGYINWEICUNZAIJINGDIANWEIXIE,DUIYUSHANGSHUJIEGOUDELEDXINPIANHEQIJIANZAIJIAGONGGUOCHENGZHONGDUIJIAGONGCHANGDI、JIQI、GONGJU、YIQI,BAOKUOYUANGONGFUZHUANGJUNYAOCAIQUFANGJINGDIANCUOSHI,QUEBAOBUSUNSHANGLED。LINGWAI,ZAIXINPIANHEQIJIANDEBAOZHUANGSHANGYEYAOCAIYONGFANGJINGDIANCAILIAO。

問:LED路燈防雷能用一個壓敏電阻嗎

DA:GUANYULUDENGDEFANGLEISHEJIBINGFEISHIYIGEJIANDANDEWENTI。SHOUXIANYAOLEJIENIDELUDENGXITONGFANGANQUANMAOJIAGOU,RUCAIYONGAC-->KAIGUANDIANYUAN-->HENGLIUYUAN-->LEDGUANGYUANDEFANGAN,NEIME,NIYINGGAISHOUXIANKAOLVKAIGUANDIANYUANDEFANGLEI,LEIJIDEQINRUWANGWANGSHIYOUACDIANXIANDAORUDE,XIANBEIQINHAIDEZHUTIYINGGAISHIKAIGUANDIANYUAN,JINGKAIGUANDIANYUANSHUCHUDEZHILIUDIANYALILUNSHANGSHIYIGANJINGDEDIANYUAN,ZHICILEIJIDUIHENGLIUYUANDEYINGXIANGYIJINGHENXIAOLE。LEDLUDENGYIBANSHIMAIXIANCHENGDEKAIGUANDIANYUANLAIPEITAO,YINCINIZAIXUANYONGSHITEBIEXUANGOUNENGFANGLEIJIDEKAIGUANDIANYUAN,JIZAIKAIGUANDIANYUANDESHURUDUANYISHEZHIFANGLEIJIDIANLU。

問:隔離型與非隔離型驅動方案各有何優缺點?應用中如何選擇?

DA:SUOWEIGELI,SHIZHISHURUYUSHUCHUJIANMEIYOUZHIJIEDEDIANQILIANJIEGUANXI,CONGANQUANDEYAOQIUJIANG,YIBANYAOQIUSHURU/SHUCHUJIANNAIYAZAI3KVYISHANG。MUQIANDEGELIXINGFANGANDUOSHIYIBIANYAQIZUOWEIGELIYUANJIANDEAC/DCDEFANJISHI(Flyback)DIANLUFANGAN,YINCIXIANGDUIDIANLUJIAOFUZA、CHENGBENJIAOGAO。ERFEIGELIXINGJIBENSHICAIYONGGONGLVDIANGANDEDC/DCDESHENGYA(Boost)HUOJIANGYA(Buck)DIANLU,XIANGDUIDIANLUJIAOJIANDAN,YINERCHENGBENYEXIANGDUIJIAODI。

江西快3 YOUYUDIANLUSHANGCHAYIJIAODA,DADUOSHUDEXINPIANDOUBUJUBEITONGSHISHIXIANLIANGZHONGFANGANDEKENENG。CONGHENGLIUJINGDUSHANGKAN,GELIXINGKEYIZUODAO±5%YINEI,ERFEIGELIXINGZEHENNANZUODAO。

MUQIANZAIYISHIDIANWEISHURUDIANYUANDELEDDENGJUZHONG(TEBIESHIQUDONGYUGUANGYUANYITIDEDENGJU),BENZHUANQUANDIYIDEYUANZE,JIBENYIBUXUZAICAIYONGFEIGELIXINGFANGAN。DANYEYOULIWAI,LEDRIGUANGDENGGUANYOUYUSHOUDAOJIEGOUHEKONGJIANDEZHIYUE,RENGHUANYONGFEIGELIXINGFANGAN。ZAIDIYAGONGDIANDELEDDENGJUZHONG,YIXIAOLVHECHENGBENYOUXIANDEYUANZE,FEIGELIXINGFANGANSHIZUIJIADEXUANZE。

問:LED被靜電擊穿的原理和過程是怎么樣的?會有何影響?

DA:LEDSHUYUBANDAOTILEIYUANJIAN,TADEPNJIESHIZHIJIELUOLUZAIWAITOUDE,HENRONGYIJIECHUJINGDIAN。DANGLEDLIANGGEDIANJISHANGJIXINGBUTONGDEDIANHEJILEI(CHANSHENGDIANHEHUOZHEZHUANYIGUOLAIDEDIANHE)DAOYIDINGDECHENGDU,YOUDEBUDAOJISHISHIFANG,DIANHENENGLIANGYIDANCHAOGUOLEDXINPIANZUIDACHENGSHOUZHISHI,DIANHEJIANGYIJIDUANDESHUNJIAN(NAMIAOJIBIE)ZAILEDLIANGGEDIANJICENGZHIJIANJINXINGFANGDIAN,CHANSHENGGONGLVJIAOERDERELIANG,ZAIDAODIANCENGZHIJIANJUBU(WANGWANGSHIDIANZUZHIZUIXIAO、DIANJIZHOUBIANDE)HUIXINGCHENG1400℃YISHANGDEGAOWEN,GAOWENJIANGHUIBADAODIANCENGZHIJIANRONGRONGCHENGYIXIEXIAOKONG,CONGERZAOCHENGLOUDIAN、ANLIANG、SIDENG、DIANXINGPIAOYIDENGXIANXIANG。

江西快3 ZHEGEJICHUANLEDDEJINGDIANNENGLIANGTABINGFEIJIUSHIYIGEGAOYA,XUESHUDEJIANGSHIYIGENENGLIANG,TAQUJUEYUDIANHEDELIANGHEDESHIJIANCHANGDUANZHELIANGGEHEXINXISHU。FANGDIANCHANEIDESHIJIANYUEDUANWEILIYUEDA,DIANHEYUEDUOWEILIYEYUEDA。JINGDIANJICHUANLEDSHIGEFEICHANGFUZADEGUOCHENG,YINCI,CESHILEDKANGJINGDIANSHIDEMONISHEJIYESHIYIXIANGHENFUZA、HENYANJINDECESHI。

BEIJINGDIANJISUNHOUDELEDRUGUOSHIBIJIAOYANZHONGDEWANGWANGSHISIDENG、LOUDIAN。QINGWEIDEJINGDIANSUNSHANG,LEDYIBANMEIYOUSHENMEYICHANG,DANCISHI,GAILEDYIJINGYOUYIDINGDEYINHUAN,DANGTASHOUDAOERCIJINGDIANSUNSHANGSHI,NEIJIUHUICHUXIANANLIANG、SIDENG、LOUDIANZENGDALA。

問:如何設計高品質LED驅動電路?

DA:LEDGUANGYUANSHIYIZHONGCHANGSHOUMINGGUANGYUAN,LILUNSHOUMINGKEDA50000XIAOSHI,DANYINGYONGDIANLUSHEJIBUHELI、DIANLUYUANQIJIANXUANYONGBUDANG、LEDGUANGYUANSANREBUHAO,DOUHUIYINGXIANGTADESHIYONGSHOUMING。TEBIESHIZAIYINGYONGDIANLULI,ZUOWEIAC/DCZHENGLIUQIAODESHUCHULVBOQIDEDIANJIEDIANRONGQI,TADESHIYONGSHOUMINGZAI5000XIAOSHIYIXIA,ZHEJIUCHENGLEZHIZAOCHANGSHOUMINGLEDDENGJUJISHUDELANLUHU,SHEJISHENGCHANKEZAIYINGYONGDIANLULISHENGQUDIANJIEDIANRONGQIDEXINYIDAILEDQUDONGICSHIKEXINGDEJIEJUEFANGAN。

江西快3 CIWAI,DUIXINYIDAILEDQUDONGICDESHEJIBIXUDAPOCHUANTONGDEDC/DCTUOPUJIEGOUSHEJILINIAN,RUCAIYONGHENGGONGLV、BUCAIYONGCIZHIKONGZHIDEJIANGYAXINGERCAIYONGDINGPINDINGDIANLIUKONGZHI、JIEJUESHIYONGLUSUDENGDIANZIBIANYAQISUOCHANSHENGDEDENGYUANSHANSHUOHEDUODENGBINGLIANBULIANGWENTIDENGDENG;HUANBIXUJIEJUELEDQUDONGICZAIDUOZHONGYINGYONGDIANLUZHONGNENGGUOEMC、ANGUI、CE、ULDENGRENZHENG;YINGYONGDIANLUYINGLIQIUJIANJIE、SHIYONGYUANQIJIANSHAO;GELIYUFEIGELIDEYINGYONGLILAISHISHANGJIAZAIANQUANYUXIAOLVZHIZHENGJIAODIAN;TIGAOPWMKONGZHIQIDEZHANKONGBIDENGDENG。

問:選擇和設計LED驅動電源時要考慮哪些因素?

江西快3 DA:LEDQUDONGDIANYUANSHIBADIANYUANGONGYINGZHUANHUANWEITEDINGDEDIANYADIANLIUYIQUDONGLEDFAGUANGDEDIANYAZHUANHUANQI,TONGCHANGQINGKUANGXIA:LEDQUDONGDIANYUANDESHURUBAOKUOGAOYAGONGPINJIAOLIU(JISHIDIAN)、DIYAZHILIU、GAOYAZHILIU、DIYAGAOPINJIAOLIU(RUDIANZIBIANYAQIDESHUCHU)DENG。ERLEDQUDONGDIANYUANDESHUCHUZEDADUOSHUWEIKESUILEDZHENGXIANGYAJIANGZHIBIANHUAERGAIBIANDIANYADEHENGDINGDIANLIUYUAN。GENJUDIANWANGDEYONGDIANGUIZEHELEDQUDONGDIANYUANDETEXINGYAOQIU,ZAIXUANZEHESHEJILEDQUDONGDIANYUANSHIYAOKAOLVDAOYIXIAJIDIAN:

江西快3 1.GAOKEKAOXING:TEBIEXIANGLEDLUDENGDEQUDONGDIANYUAN,ZHUANGZAIGAOKONG,WEIXIUBUFANGBIAN,WEIXIUDEHUAFEIYEDA。

2.GAOXIAOLV:LEDSHIJIENENGCHANPIN,QUDONGDIANYUANDEXIAOLVYAOGAO。DUIYUDIANYUANANZHUANGZAIDENGJUNEIDEJIEGOUYOUWEIZHONGYAO。YINWEILEDDEFAGUANGXIAOLVSUIZHULEDWENDUDESHENGGAOERXIAJIANG,SUOYILEDDESANREFEICHANGZHONGYAO。DIANYUANDEXIAOLVGAO,TADEHAOSUNGONGLVXIAO,ZAIDENGJUNEIFARELIANGJIUXIAO,YEJIUJIANGDILEDENGJUDEWENSHENG。DUIYANHUANLEDDEGUANGSHUAIYOULI。

3.GAOGONGLVYINSU:GONGLVYINSUSHIDIANWANGDUIFUZAIDEYAOQIU。YIBAN70WAYIXIADEYONGDIANQI,MEIYOUQIANGZHIXINGZHIBIAO。SUIRANGONGLVXIAODEDANGEYONGDIANQIGONGLVYINSUDIYIDIANDUIDIANWANGDEYINGXIANGBUDA,DANWANSHANGDAJIADIANDENG,TONGLEIFUZAITAIJIZHONG,HUIDUIDIANWANGCHANSHENGJIAOYANZHONGDEWURAN。DUIYU30WA~40WADELEDQUDONGDIANYUAN,JUSHUOBUJIUDEJIANGLAI,YEXUHUIDUIGONGLVYINSUFANGMIANYOUYIDINGDEZHIBIAOYAOQIU。

4.QUDONGFANGSHI:XIANZAITONGXINGDEYOULIANGZHONG:YIZHONGSHIYIGEHENGYAYUANGONGDUOGEHENGLIUYUAN,MEIGEHENGLIUYUANDANDUGEIMEILULEDGONGDIAN。CIFANGSHI,ZUHEHENLINGHUO,YILULEDGUZHANG,BUYINGXIANGQITALEDDEGONGZUO,DANCHENGBENHUILVEGAOYIDIAN。LINGYIZHONGSHIZHIJIEHENGLIUGONGDIAN,LEDCHUANLIANHUOBINGLIANYUNXING。TADEYOUDIANSHICHENGBENDIYIDIAN,DANSHILINGHUOXINGCHA,HUANYAOJIEJUEMOUGELEDGUZHANG,BUYINGXIANGQITALEDYUNXINGDEWENTI。ZHELIANGZHONGXINGSHI,ZAIYIDUANSHIJIANNEIBINGCUN。DUOLUHENGLIUSHUCHUGONGDIANFANGSHI,ZAICHENGBENHEXINGNENGFANGMIANHUIJIAOHAO。YEXUSHIYIHOUDEZHULIUFANGXIANG。

5.LANGYONGBAOHU:LEDKANGLANGYONGDENENGLISHIBIJIAOCHADE,TEBIESHIKANGFANXIANGDIANYANENGLI。JIAQIANGZHEFANGMIANDEBAOHUYEHENZHONGYAO。YOUXIELEDDENGZHUANGZAIHUWAI,RULEDLUDENG。YOUYUDIANWANGFUZAIDEQISHUAIHELEIJIDEGANYING,CONGDIANWANGXITONGHUIQINRUGEZHONGLANGYONG,YOUXIELANGYONGHUIDAOZHILEDDESUNHUAI。YINCILEDQUDONGDIANYUANYAOYOUYIZHILANGYONGDEQINRU,BAOHULEDBUBEISUNHUAIDENENGLI。

江西快3 6.BAOHUGONGNENGDIANYUANCHULECHANGGUIDEBAOHUGONGNENGWAI,ZUIHAOZAIHENGLIUSHUCHUZHONGZENGJIALEDWENDUFUFANKUI,FANGZHILEDWENDUGUOGAO。

7.FANGHUDENGJUWAIANZHUANGXING,DIANYUANJIEGOUYAOFANGSHUI、FANGCHAO,WAIKEYAONAISHAI。

江西快3 8.QUDONGDIANYUANDESHOUMINGYAOYULEDDESHOUMINGXIANGSHIPEI。

江西快3 9.YAOFUHEANGUIHEDIANCIJIANRONGDEYAOQIU。

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