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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="a2gglxj" class="twoCol"><div id="3s2mc3v" class="page-proshow clearfix"><p class="current"> 當前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應</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>?河南飛利浦投光燈批發(fā) 歡迎咨詢上海先盛照明電器供應</p><div id="lxjqsh3" class="leftbox clearfix"><h1>河南飛利浦投光燈批發(fā) 歡迎咨詢上海先盛照明電器供應</h1><div id="uda3vby" class="proBig"><div id="dxubnkm" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781448710938/2265050.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="wq8aczb" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781448710938/2265050.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="u7frdpw" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</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)品關鍵詞：</span>河南飛利浦投光燈批發(fā),投光燈</p><p><span>***更新：</span>2021-01-13 00:20:37</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="nu4uw8f" 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: </span>021-54169416</p><p><span>地址: </span>陶干路1199號</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="odn3iax" class="page-proshow02"><p class="title">詳細說明</p><div id="tdnjgsz" class="box"><p><p style="text-indent:25px">LED手電簡發(fā)光二極管是由III-IV族化合物，如GaAs (砷化鎵)、GaP (磷化鎵)、<span style="display:none;"></span>GaAsP<span style="display:none;"></span>(磷砷化鎵)等半導體制成的，其**是PN結。因此它具有一般P-N結的I-N特性，即正向導通，反向截止、擊穿特性。此外，在- -定條件下，它還具有發(fā)光特性。在正向電壓下，電子由N區(qū)注入P區(qū)，空穴由P區(qū)注入N區(qū)。進入對方區(qū)域的少數(shù)載流子(少子)一部分與多數(shù)載流子(多子)復合而發(fā)光，假設發(fā)光是在 P區(qū)中發(fā)生的，那么注入的電子與價帶空穴直接復合而發(fā)光，或者先被發(fā)光中心捕獲后，再與空穴復合發(fā)光，河南飛利浦投光燈批發(fā)，河南飛利浦投光燈批發(fā)。衰減特性除與紅、綠、藍LED本身特性相關外，河南飛利浦投光燈批發(fā)，使用電流、PCB板散熱設計、顯示屏使用環(huán)境溫度等均對衰減影響。河南飛利浦投光燈批發(fā)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南飛利浦投光燈批發(fā),投光燈" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781448710938/2265050.png"></div><p style="text-indent:25px">有些元器件是因為自身內(nèi)部的接觸不良，也有元器件互連時的接觸不良，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、鍍金、等等。所以組件之間的接觸，其實就是這些鍍層金屬之間的接觸。當然，不同的鍍層金屬的導電率是不同的，對應產(chǎn)生的接觸電阻也有所不同。河南飛利浦投光燈批發(fā)以防止LED因內(nèi)部芯片受潮造成漏電引起LED燈珠不亮。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南飛利浦投光燈批發(fā),投光燈" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781305722656/5520519.png"></div><p style="text-indent:25px">色溫范圍廣，幾乎可以提供任意色溫，而且還可以提供紅綠藍以至任何一種顏色的燈光。顯指高，白熾燈的顯色指數(shù)為95，熒光燈為65-80，而LED日光燈則可以>80。沒有紫外線輻射。非玻璃制品，不易破損，耐沖擊，耐振動。10.外置隔離電源的LED日光燈，在燈管兩端都接觸不到市電高壓，只有低于36V的直流安全電壓，不存在觸電的危險，完全是一種安全的燈具。目前LED日光燈***的缺點就是價格高。不過盡管目前LED日光燈的價格大約是熒光燈的十倍左右，如果聯(lián)系到它的壽命、節(jié)電和無污染來看，仍然是合算的。因為如果和壽命為5,000小時的熒光燈相比，那么壽命為5萬小時的LED日光燈就已經(jīng)值得.</p><p style="text-indent:25px">比紅光波長長的光為紅外光。現(xiàn)在已有紅外、紅、黃、綠及藍光發(fā)光二極管，但其中藍光二極管成本、價格很高, 使用不普遍。LED的調(diào)光控制傳統(tǒng)上，LED的調(diào)光是利用一個DC信號或濾液PWM對LED中的正向電流進行調(diào)節(jié)來完成的。減小LED電流將起到調(diào)節(jié)LED光輸出強度的作用，然而，正向電流的變化也會改變LED的彩色,因為LED的色度會隨著電流的變化而變化。許多應用(例如汽車和LCD TV背光照明)都不能允許LED發(fā)生任何的色彩漂移。在這些應用中，由于周圍環(huán)境中存在不同的光線變化，而且人眼對于光強的微小變化都很敏感，因此寬范圍調(diào)光是必需的。視角的選擇需要根據(jù)具體的用途來決定。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南飛利浦投光燈批發(fā),投光燈" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781495341797/4514745.png"></div><p style="text-indent:25px">這種現(xiàn)象屢見不鮮。有些小企業(yè)采用手工焊接，使用40瓦普通烙鐵，焊接溫度無法控制，烙鐵溫度在300-400°℃以上，過高的焊接溫度也會造成死燈，LED引線在高溫下膨脹系數(shù)比在150℃左右的膨脹系數(shù)高好幾倍，內(nèi)部的金絲焊點會因為過大的熱脹冷縮將焊接點拉開，造成死燈現(xiàn)象。2、LED燈內(nèi)部連線焊點開路造成死燈現(xiàn)象的原因分析2.1封裝企業(yè)生產(chǎn)工藝不建全，來料檢驗手段落后，是造成LED死燈的直接原因，一般采用支架排封裝的LED,支架排是采用銅或鐵金屬材料經(jīng)精密模具沖壓而成一般來說，LED的人體靜電模式測試失效電壓不應低于2000V。河南飛利浦投光燈批發(fā)</p><p style="text-indent:25px">在汽車儀表板及其他各種照明部分的光源，都可用超高亮度發(fā)光燈來擔當，所以均在逐步采用LED顯示。河南飛利浦投光燈批發(fā)</p><p style="text-indent:25px">而效率(y則是輸出功率和輸入功率的比值，即輸出功率(輸出LED的電壓*輸出電流/輸入功率，這個參數(shù)尤為重要，涉及到產(chǎn)品和用戶的利益，如果效率低就意味著輸入功率有很大一部分轉化為熱量散發(fā)出來;如果是裝在燈管內(nèi)就會產(chǎn)生一個很高的溫度，再加.上我們LED的一個光效比所散發(fā)熱.量，就會疊加產(chǎn)生更高的溫度。而我們的電源內(nèi)部所有電子零件的壽命都會隨溫度的上升而縮短.效率高，轉化成光的效率就高，而且電源和燈管的發(fā)熱就會減少，相當于省電，產(chǎn)品性能和壽命會提高。所以說效率是決定電源壽命zui根本的因數(shù)，效率不能太低，否則消耗在電源上的熱量太大。一般在0.8-0.9以上就可以了。功率因素，效率這兩個指標有時會河南飛利浦投光燈批發(fā)</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2817253.html</p></div></div></div></div></div><div id="fuwdact" class="page-right twoColRt"><div id="jtas7sk" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="2qkmoa7" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應</p></a></div><div 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