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href="http://www.cdcfah.com/zh/"><span>展會(huì)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="4wu2ela" class="twoCol"><div id="zdogw32" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁(yè)?<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>?浙江投光燈燈具歡迎來電上海先盛照明電器供應(yīng)</p><div id="toglq8m" class="leftbox clearfix"><h1>浙江投光燈燈具歡迎來電上海先盛照明電器供應(yīng)</h1><div id="g71ji5w" class="proBig"><div id="poo77at" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781212353516/4466745.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="whchqy2" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781212353516/4466745.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="7qeimf8" 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>浙江投光燈燈具,投光燈</p><p><span>***更新：</span>2021-01-21 11:09:02</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="pzuo3js" 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(hào)</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="n6ckkvg" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="jpjh9lj" class="box"><p><p style="text-indent:25px">LED的發(fā)光亮度正比于PWM的脈沖占空比，在這種調(diào)光控制方法下，可以在高度調(diào)光比范圍內(nèi)保持LED的發(fā)光顏色不變，采用PWM的LED調(diào)光控制的調(diào)光比范圍可達(dá)3000: 1。線性 LED調(diào)光控制方法就是采用模擬調(diào)光控制方法，在模擬調(diào)光控制下，浙江投光燈燈具，通過調(diào)節(jié)LED的正向工作電流來實(shí)現(xiàn)LED的調(diào)光控制，調(diào)光控制范圍可達(dá)10:1，浙江投光燈燈具，浙江投光燈燈具。如果要進(jìn)一步降低LED的正向工作電流則會(huì)產(chǎn)生LED發(fā)光顏色發(fā)生變化和不能準(zhǔn)確調(diào)節(jié)控制LED的正向工作電流的問題。運(yùn)作參數(shù)和效率 - -般zui常見的LED工作功率都是設(shè)定于30至60毫瓦電能以下?？碙ED燈用的芯片和生產(chǎn)工藝，用眼睛是看不出來區(qū)別的。浙江投光燈燈具</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江投光燈燈具,投光燈" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781212353516/4466745.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(duì)接觸不良的影響不大。上海大功率投光燈報(bào)價(jià)看FPC質(zhì)量。FPC分敷銅和壓延銅兩種,敷銅板的銅箔是凸出來的，細(xì)看的話能從焊盤與FPC的連接處看出來。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江投光燈燈具,投光燈" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781717548828/354470.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(huì)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(diǎn)會(huì)因?yàn)檫^大的熱脹冷縮將焊接點(diǎn)拉開，造成死燈現(xiàn)象。2、LED燈內(nèi)部連線焊點(diǎn)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(yàn)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</p><p style="text-indent:25px">尤其是09年剛剛新起的維達(dá)U盤LED控制卡目前使用的zui多，維達(dá)∪盤LED控制卡可用串口連接電腦，也可用U盤傳遞信息，省電腦、免布線、支持模擬時(shí)鐘、流水邊框，維達(dá)U盤LED控制卡適合各種室內(nèi)外顯示屏，上市以來深受全國(guó)各地LED顯示屏廠商喜愛?？刂瓶?nbsp;LED顯示屏發(fā)展到今己逐步走入民用化，如各種店面用的門頭屏、室內(nèi)外的各種方形屏和其他的各種條型屏等。目前要配顯示屏必須要配接一臺(tái)電腦來更新內(nèi)容，這使得很大一部分用戶特別是廣告用戶更新節(jié)目困難。另外作業(yè)時(shí)注意烙接時(shí)溫度不能過高，盡量不要超過270度，時(shí)間不要超過3秒。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江投光燈燈具,投光燈" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637269781652041016/5513893.png"></div><p style="text-indent:25px">太陽(yáng)能電池板光效達(dá)到127Wp/m2，效率較高，對(duì)系統(tǒng)的抗風(fēng)設(shè)計(jì)非常有利;燈頭部分以1W白光LED和1W黃光LED集成于印刷電路板上排列為一定間距的點(diǎn)陣作為平面發(fā)光源?？刂葡湎潴w以不銹鋼為材質(zhì)，美觀耐用;控制箱內(nèi)放置免維護(hù)鉛酸蓄電池和充放電控制器。本系統(tǒng)選用閥控密封式鉛酸蓄電池，由于其維護(hù)很少，故又被稱為“免維護(hù)電池”，有利于系統(tǒng)維護(hù)費(fèi)用的降低;充放電控制器在設(shè)計(jì)上兼顧了功能齊備(具備光控、時(shí)控、過充保護(hù)、過放保護(hù)和反接保護(hù)等)與成本控制，實(shí)現(xiàn)很高的性價(jià)比。主要是由于LED器件的亮度衰減造成的。上海大功率投光燈報(bào)價(jià)</p><p style="text-indent:25px">5mm 的橢圓燈主要用于P16以上的戶外顯示屏，3mm的橢圓燈主要用于P12.5、P12、P10的戶外顯示屏。浙江投光燈燈具</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(gè)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(zhuǎn)化為熱量散發(fā)出來;如果是裝在燈管內(nèi)就會(huì)產(chǎn)生一個(gè)很高的溫度，再加.上我們LED的一個(gè)光效比所散發(fā)熱.量，就會(huì)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(huì)隨溫度的上升而縮短.效率高，轉(zhuǎn)化成光的效率就高，而且電源和燈管的發(fā)熱就會(huì)減少，相當(dāng)于省電，產(chǎn)品性能和壽命會(huì)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(gè)指標(biāo)有時(shí)會(huì)浙江投光燈燈具</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2946489.html</p></div></div></div></div></div><div id="5pa3ipq" class="page-right twoColRt"><div id="uhmndnf" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="b8wapjy" 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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