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href="http://www.cdcfah.com/xw/"><span>行業(yè)資訊</span></a></li><li id = "index_show"><a href="http://www.cdcfah.com/zh/"><span>展會信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="dtph7xl" class="twoCol"><div id="d9lth5d" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_zmgy/">照明工業(yè)</a>?<a href="http://www.cdcfah.com/cp/second-zmgy_snzmdjeh/">室內(nèi)照明燈具</a>?<a href="http://www.cdcfah.com/cp/third-snzmdjeh_tongdengwa/">筒燈</a>?河南1688投光燈燈具歡迎咨詢上海先盛照明電器供應(yīng)</p><div id="trr3z3z" class="leftbox clearfix"><h1>河南1688投光燈燈具歡迎咨詢上海先盛照明電器供應(yīng)</h1><div id="vvxfffl" class="proBig"><div id="brh79bz" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781071572266/5060107.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="7h9pxnd" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781071572266/5060107.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="pl1ntbn" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>河南1688投光燈燈具,投光燈</p><p><span>***更新：</span>2021-02-05 14:11:44</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="h7lfnd9" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海先盛照明電器有限公司</a></p><p><span>聯(lián)系人：</span>顧勇軍</p><p><span>郵箱: </span>522366548@qq.com</p><p><span>電話: </span>13301861712</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>021-54169416</p><p><span>地址: </span>陶干路1199號</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="xhh9rfn" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="jv9jfzt" class="box"><p><p style="text-indent:25px">有些元器件是因?yàn)樽陨韮?nèi)部的接觸不良，也有元器件互連時(shí)的接觸不良，也有虛焊（一般為組件與PCB）產(chǎn)生的不良。下面以zui常見的連接器（接插件）之間的接觸為實(shí)例分析接觸不良問題，之后大家可以觸類旁通。連接器一般是針接觸件和孔接觸件之間的連接。我們知道，元器件的引腳或端子，一般是有一層鍍層，比如鍍鉛錫合金、鍍純錫、鍍鎳、鍍銀、鍍銀鈀合金，河南1688投光燈燈具、鍍金、等等。所以組件之間的接觸，河南1688投光燈燈具，河南1688投光燈燈具，其實(shí)就是這些鍍層金屬之間的接觸。當(dāng)然，不同的鍍層金屬的導(dǎo)電率是不同的，對應(yīng)產(chǎn)生的接觸電阻也有所不同。任一顏色LED的失效均會影響顯示屏整體視覺效果。河南1688投光燈燈具</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南1688投光燈燈具,投光燈" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781071572266/5060107.png"></div><p style="text-indent:25px">―從發(fā)光強(qiáng)度角分布圖來分有三類:(1）高指向性。一般為尖頭環(huán)氧封裝，或是帶金屬反射腔封裝，且不加散射劑。半值角為5°～20°或更小，具有很高的指向性，可作局部照明光源用，或與光檢出器聯(lián)用以組成自動(dòng)檢測系統(tǒng)。(2）標(biāo)準(zhǔn)型。通常作指示燈用，其半值角為20°~45°。(3）散射型。這是視角較大的指示燈，半值角為45°~90°或更大，散射劑的量較大。3、按發(fā)光二極管的結(jié)構(gòu)分―按發(fā)光二極管的結(jié)構(gòu)分有全環(huán)氧包封、金屬底座環(huán)氧封裝、陶瓷底座環(huán)氧封裝及玻璃封裝等結(jié)構(gòu)。浙江戶外投光燈具批發(fā)接下來，我們在排除電源情況之外，如果還不亮，則還需要通過檢查led 頂燈的正負(fù)極引腳。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南1688投光燈燈具,投光燈" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781613906250/8543994.png"></div><p style="text-indent:25px">一般金的導(dǎo)電率比較好，銀次之。在焊接工藝時(shí)，由于焊接實(shí)際上是形成合金的過程，這個(gè)合金本身就是良導(dǎo)體，所以焊接本身的可靠性是比較高的，除非是焊接不良。但是，連接器之間的連接，靠的是表面之間的接觸，所以容易導(dǎo)致接觸不良，更具體的原因分析如下。兩個(gè)金屬表面之間的接觸是否良好，主要取決于材料（不同金屬導(dǎo)電率不同)、接觸壓力、實(shí)際接觸面結(jié)。關(guān)于材料種類，上面已經(jīng)提到了，一般器件的鍍層材料，基本上都是由良導(dǎo)體做的，對接觸不良的影響不大。</p><p style="text-indent:25px">LED射燈燈杯選購方法三看:一看LED燈杯的外觀，首先外觀要是自己喜歡的樣式，細(xì)節(jié)是zui能表現(xiàn)一個(gè)產(chǎn)品的工藝的，仔細(xì)檢查產(chǎn)品的構(gòu)造、是光滑還是粗糙，比例是否協(xié)調(diào)，這些都可以看出產(chǎn)品的質(zhì)量好壞。二看LED·燈杯的具體參數(shù)。標(biāo)稱值重點(diǎn)是:光通量，單位Lumen，消耗功率，單位W，Lumen/W即光效，光效高者為好;使用壽命;燈頭標(biāo)準(zhǔn)等都是我們查看的重點(diǎn)，通過對參數(shù)的比較，從內(nèi)了LED燈杯。三看LED燈杯的光色，可以要求商家點(diǎn)亮，然后觀察其亮度和光色，看表現(xiàn)是否有眩光、亮點(diǎn)、額外的光斑，燈光是否柔和清晰。通過“三看”就可以基本上判斷一只LED·燈杯的好壞了。這樣，紅、綠、藍(lán)三種顏色LED的角度一致性將影響不同角度白平衡一致性，直接影響顯示屏視頻顏色的保真度。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南1688投光燈燈具,投光燈" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269782039189453/4436063.png"></div><p style="text-indent:25px">2.LED應(yīng)用產(chǎn)品散熱難結(jié)構(gòu)設(shè)計(jì)在燈具中大概占20%,一直以來中困勤勞人民都會定價(jià)很低，20%成本認(rèn)為很合理，zui大的問題是怎樣更有創(chuàng)新，設(shè)計(jì)更合理。―散熱成本要維持在5%,實(shí)際散熱設(shè)計(jì)很簡單，把住兩個(gè)方向:一是，LED芯片與外散熱器件路徑越短越好，越短你的散熱設(shè)計(jì)就越好;二是，散熱阻力，就是要有足夠的散熱傳到路徑同時(shí)也要有足夠的'散熱道路'.這部分成本主要在結(jié)構(gòu)，用于散熱成本并不多。3.LED應(yīng)用電源管理電源是LED燈具zui薄弱的環(huán)節(jié)，嚴(yán)重滯后LED燈具發(fā)展，品質(zhì)有待提高。如果是，這種情況也容易造成Led燈珠不亮，解決方法是選擇合適的恒流的電源。河南1688投光燈燈具</p><p style="text-indent:25px">LED在顯示屏整體成本中所占比例比較大，從30%至70%不等。河南1688投光燈燈具</p><p style="text-indent:25px">在1999年開始引入了可以在1瓦電力輸入下連續(xù)使用的商業(yè)品級LED。這些LED都以特大的半導(dǎo)體芯片來處理高電能輸入的問題，而那半導(dǎo)體芯片都是固定在金屬鐵片上，以助散熱。在2002年，在市場上開始有5瓦的LED的出現(xiàn)，而其效率大約是每瓦18至22流明。2003年九月，Cree,Inc. 公司展示了其新款的藍(lán)光LED，在20毫安下達(dá)到35%的照明效率。他們亦制造了一款達(dá)65流明每瓦的白光LED商品，這是當(dāng)時(shí)市場上zui光的白光LED。在2005年他們展示了一款白光LED原型,在350毫安工作環(huán)境下，創(chuàng)下了每瓦70流明的記錄性效率。今<span style="display:none;"></span>白光LED原型,在350毫安工作環(huán)境下，創(chuàng)下了每瓦70流明的記錄性效率。河南1688投光燈燈具</p></p><br 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