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class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781717548828/354470.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="cvmf7u3" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781717548828/354470.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="k8m2mja" 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>天津白光投光燈性能,投光燈</p><p><span>***更新：</span>2020-10-24 00:23:16</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="gjf3frd" 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(huà): </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(hào)</p><p>[當(dāng)前離線(xiàn)] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="nqhv3zt" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="mz3yzvr" class="box"><p><p style="text-indent:25px"><span style="display:none;"></span>雖然功率不大的單個(gè)用電器功率因素低一點(diǎn)對(duì)電網(wǎng)的影響不大，但晚上大家點(diǎn)燈，同類(lèi)負(fù)載太集中，會(huì)對(duì)電網(wǎng)產(chǎn)生較嚴(yán)重的污染。對(duì)于30瓦~40瓦的LED驅(qū)動(dòng)電源，據(jù)說(shuō)不久的將來(lái)，也許會(huì)對(duì)功率因素方面有一定的指標(biāo)要求。4. 驅(qū)動(dòng)方式現(xiàn)在通行的有兩種:其一是一個(gè)恒壓源供多個(gè)恒流源，每個(gè)恒流源單獨(dú)給每路LED供電。這種方式，組合靈活，一路LED故障，不影響其他LED的工作，但成本會(huì)略高-一點(diǎn)。另一種是直接恒流供電，LED串聯(lián)或并聯(lián)運(yùn)行。它的優(yōu)點(diǎn)是成本低一點(diǎn)，但靈活性差，還要解決某個(gè)LED故障，天津白光投光燈性能，不影響其他LED運(yùn)行的問(wèn)題。這兩種形式，天津白光投光燈性能，在-段時(shí)間內(nèi)并存，天津白光投光燈性能。<span style="display:none;"><span style="display:none;"></span></span>不**關(guān)于LED顯示屏廠(chǎng)商的走向，也牽連的LED顯屏器件廠(chǎng)家的發(fā)展。天津白光投光燈性能</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="天津白光投光燈性能,投光燈" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781717548828/354470.png"></div><p style="text-indent:25px">土壤濕接地電阻較容易達(dá)到，秋冬季干燥土壤水分少，接地電阻就有可能超過(guò)規(guī)定數(shù)值，作記錄是為了保存原始數(shù)據(jù)，做到日后有據(jù)可查。符合ISO2000質(zhì)量管理體系。測(cè)試接地電阻可以自行設(shè)計(jì)表格，接地電阻測(cè)試封裝企業(yè)、LED應(yīng)用企業(yè)都要做，只要將各種設(shè)備名稱(chēng)填于表格內(nèi)，測(cè)出各設(shè)備的接地電阻記錄在案，測(cè)試人簽名即可存檔。人體靜電對(duì)LED的損害也是很大的，工作時(shí)應(yīng)穿防靜電服裝，配帶靜電環(huán)，靜電環(huán)應(yīng)接地良好，有一種不須要接地的靜電環(huán)防靜電的效果不好湖南專(zhuān)業(yè)投光燈以防止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="天津白光投光燈性能,投光燈" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781919140625/8831194.png"></div><p style="text-indent:25px">由于銅材較貴，成本自然就高，受市場(chǎng)激烈竟?fàn)幰蛩赜绊懀瑸榱私?*造成本，市場(chǎng)大多都采用冷軋低碳鋼帶來(lái)沖壓LED支架徘，鐵的支架排要經(jīng)過(guò)鍍銀，鍍銀有兩個(gè)作用，一是為了防止氧化生銹，二是方便焊接，支架排的電鍍質(zhì)量非常關(guān)鍵，它關(guān)系到LED的壽命，在電鍍前的處理應(yīng)嚴(yán)格按操作規(guī)程進(jìn)行，除銹、除油、磷化等工序應(yīng)一絲不茍，電鍍時(shí)要控制好電流，鍍銀層厚度要控制好，鍍層太厚成本高，太薄影響質(zhì)量。電鍍時(shí)要控制好電流，鍍銀層厚度要控制好，鍍層太厚成本高，太薄影響質(zhì)量。</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(jiàn)的連接器（接插件）之間的接觸為實(shí)例分析接觸不良問(wèn)題，之后大家可以觸類(lèi)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(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(duì)應(yīng)產(chǎn)生的接觸電阻也有所不同。故只要LED器件品質(zhì)保證、工作電流合適、PCB散熱設(shè)計(jì)合理、顯示屏生產(chǎn)工藝嚴(yán)謹(jǐn)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="天津白光投光燈性能,投光燈" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781212353516/4466745.png"></div><p style="text-indent:25px">在一些24小時(shí)連續(xù)工作的場(chǎng)地，例如地下停車(chē)場(chǎng)、24小時(shí)加班生產(chǎn)的工廠(chǎng)等地方。節(jié)電也是十分重要的。如上所述，- -根T8的LED日光燈大約可以節(jié)省20瓦電，一年下來(lái)就可以節(jié)省20x365x24/1000=175.2度電。假如以每度電0. 7元計(jì)算，那么一年下來(lái)，可以節(jié)省電費(fèi)122.64元，兩年下來(lái)，就可以節(jié)省出這根LED日光燈的成本。以后所節(jié)省的電費(fèi)就成為純收益了。所以現(xiàn)在國(guó)外有一種稱(chēng)之為EMC (能源管理合同Energy ManagementContract)作法。就是由一家財(cái)團(tuán)或銀行出資。替一個(gè)地下停車(chē)場(chǎng)或商場(chǎng)**安裝LED日光燈，但是要向業(yè)主收取所有節(jié)省下來(lái)的電費(fèi)，協(xié)議有效期可能為5年。只要2年以后，就可以回收所有投資，第三年開(kāi)始，所有節(jié)省下來(lái)的電費(fèi)就變成是純收益了。這是一個(gè)十分有利的投資項(xiàng)目。國(guó)內(nèi)也開(kāi)始有人這樣做了。更何況按照Haitz定律，LED的價(jià)格每十年將降低十倍!3、LED燈珠本身的質(zhì)量問(wèn)題，也可以造成LED燈珠不亮，因?yàn)橛行㎜ED燈珠芯片存在漏電。安徽批發(fā)投光燈批發(fā)</p><p style="text-indent:25px">由于LED是有角度的，故全彩LED顯示屏同樣具有角度方向性，即在不同角度觀(guān)看時(shí)，其亮度是會(huì)遞增或遞減的。天津白光投光燈性能</p><p style="text-indent:25px">線(xiàn)性調(diào)節(jié)zui簡(jiǎn)便的方法是在LED驅(qū)動(dòng)控制C中使用外部SET電阻來(lái)實(shí)現(xiàn)LED的調(diào)光控制。雖然，這種調(diào)光控制方法有效，但卻缺乏靈活性，無(wú)法讓用戶(hù)改變光強(qiáng)度。線(xiàn)性調(diào)節(jié)則會(huì)降低效率，并引起白光LED朝向黃色光譜的色彩偏移?？赡苁禽p微的偏移,但可在敏感應(yīng)用中檢測(cè)出。采用數(shù)字或叫PWM的LED調(diào)光控制法以大于100HZ的開(kāi)關(guān)工作頻率，以脈寬調(diào)制的方法改變LED驅(qū)動(dòng)電流的脈沖占空比來(lái)實(shí)理LED的調(diào)光控制，選用大于100HZ開(kāi)關(guān)調(diào)光控制頻率主要是為了避免人眼感覺(jué)到調(diào)光閃爍現(xiàn)象，在LED的PWM調(diào)光控制下。<span style="display:none;"><span style="display:none;"><span style="display:none;"><span style="display:none;"><span style="display:none;"><span style="display:none;"><span style="display:none;"><span style="display:none;"></span></span></span></span></span></span></span></span>天津白光投光燈性能</p><p style="text-indent:25px">上海先盛照明電器有限公司主要經(jīng)營(yíng)范圍是照明工業(yè)，擁有一支專(zhuān)業(yè)技術(shù)團(tuán)隊(duì)和良好的市場(chǎng)口碑。公司業(yè)務(wù)分為投光燈，三防燈，筒射燈，燈管等，目前不斷進(jìn)行創(chuàng)新和服務(wù)改進(jìn)，為客戶(hù)提供良好的產(chǎn)品和服務(wù)。公司秉持誠(chéng)信為本的經(jīng)營(yíng)理念，在照明工業(yè)深耕多年，以技術(shù)為先導(dǎo)，以自主產(chǎn)品為重點(diǎn)，發(fā)揮人才優(yōu)勢(shì)，打造照明工業(yè)良好品牌。上海先盛照明憑借創(chuàng)新的產(chǎn)品、專(zhuān)業(yè)的服務(wù)、眾多的成功案例積累起來(lái)的聲譽(yù)和口碑，讓企業(yè)發(fā)展再上新高。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/1678559.html</p></div></div></div></div></div><div id="d8qyjkr" class="page-right twoColRt"><div id="nqhdpag" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="ck3o389" 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(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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