河南大功率LED咨詢問價歡迎來電上海先盛照明電器供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="脈沖調(diào)頻調(diào)光法脈沖調(diào)頻調(diào)光法（PFM）也是常用的調(diào)光方法，河南大功率LED咨詢問價。如果高頻交流電子鎮(zhèn)流器的開關(guān)工作頻率增加，則鎮(zhèn)流電感的阻抗增加，這樣流過鎮(zhèn)流電感的電流就會下降，導(dǎo)致流過燈負(fù)載的電流下降，從而實(shí)現(xiàn)調(diào)"><meta name="keywords" content="河南大功率LED咨詢問價,LED"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center 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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_zmytdj/">專門用途燈具</a>?<a href="http://www.cdcfah.com/cp/third-zmytdj_leddengju/">LED燈具</a>?河南大功率LED咨詢問價歡迎來電上海先盛照明電器供應(yīng)</p><div id="zdfhj3j" class="leftbox clearfix"><h1>河南大功率LED咨詢問價歡迎來電上海先盛照明電器供應(yīng)</h1><div id="edvcz9z" class="proBig"><div id="8lhew93" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637402597688014041/4313419.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="waxurgn" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637402597688014041/4313419.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="87p83ao" 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(guān)鍵詞：</span>河南大功率LED咨詢問價,LED</p><p><span>***更新：</span>2020-11-29 02:08:38</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="dvmtvzk" 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="lu37lht" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="jikhji7" class="box"><p><p style="text-indent:25px">脈沖調(diào)頻調(diào)光法脈沖調(diào)頻調(diào)光法（PFM）也是常用的調(diào)光方法，河南大功率LED咨詢問價。如果高頻交流電子鎮(zhèn)流器的開關(guān)工作頻率增加，則鎮(zhèn)流電感的阻抗增加，這樣流過鎮(zhèn)流電感的電流就會下降，導(dǎo)致流過燈負(fù)載的電流下降，從而實(shí)現(xiàn)調(diào)光。圖2為4英尺40W熒光燈脈沖調(diào)頻調(diào)光法的調(diào)光特性曲線（脈沖占空比D=0.45）脈沖調(diào)頻調(diào)光法的局限性。調(diào)光范圍由調(diào)頻范圍決定，如果調(diào)頻范圍不大，則熒光燈功率調(diào)節(jié)范圍也不大，河南大功率LED咨詢問價。為了實(shí)現(xiàn)在低熒光燈燈功率工作條件下實(shí)現(xiàn)調(diào)光，河南大功率LED咨詢問價，則調(diào)頻范圍應(yīng)很寬（即從25~50kHz）。LED，就選上海先盛照明電器有限公司，讓您滿意，歡迎您的來電哦！河南大功率LED咨詢問價</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南大功率LED咨詢問價,LED" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637402597688014041/4313419.png"></div><p>只是一般指示燈用直插的。照明的很多用LED燈珠的。這也是應(yīng)用上分類的一部分，事實(shí)上，早期的照明產(chǎn)品和指示燈用LED燈珠，都是直插的?，F(xiàn)在LED燈珠貼片因?yàn)榉庋b工藝的提升，單顆的功率上來了，亮度也上來了，所以，近年來貼片燈珠應(yīng)用越來越廣了。但是，在很多要求小角度，亮度高的指示燈產(chǎn)品上，還是有很多選擇應(yīng)用LED燈珠直插的。所以，LED燈珠和LED貼片哪個更好。一般我會建議你，用小角度，要求亮度高，聚光性好，小功率的，建議用LED燈珠直插型的。照明產(chǎn)品，或要求發(fā)光比較均勻，發(fā)光角度要大的，光斑要求小，功率比較大的，一般建議用LED燈珠貼片。LED燈珠和LED貼片哪個更好，好的你要先告訴我你準(zhǔn)備用在什么產(chǎn)品上，我們的工程師可以給你分析哪款更好。燈珠教授每天都會分享LED燈珠資訊和行業(yè)信息。led燈珠怎么選型號？教授給你led燈珠型號對照表！選燈珠、買燈珠、用燈珠有疑問，就來找燈珠教授！希望LED燈珠和LED貼片哪個更好的分享能給你的LED燈珠選型帶來幫助，如果你還需要了解更多的LED燈珠貼片，直插，大功率或COB燈珠資訊，可以聯(lián)系或留言我們。我們會時間跟進(jìn)處理。后的話：買燈珠，找臺宏，提高選型效率，降低維護(hù)成本。浙江方便LED解決方案上海先盛照明電器有限公司是一家專業(yè)提供LED的公司，歡迎新老客戶來電！</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南大功率LED咨詢問價,LED" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637402597580084318/2407059.png"></div><p>首先“LED屏幕與LCD屏幕有什么區(qū)別？”這個問題本身就是不成立的，之所以用這個標(biāo)題，還是為了激發(fā)讀者閱讀興趣，增加點(diǎn)擊率。為什么這個問題不成立？因?yàn)樵谝壕щ娨暽?，LED屏幕與LCD屏幕其實(shí)是一個意思，都表示液晶屏幕，而LED屏幕是錯誤的叫法，LCD才是正確的液晶電視屏幕表達(dá)方法。為什么會有LED屏幕這種錯誤的叫法？首先簡單了解一下液晶屏幕的構(gòu)造，這里我們講簡單一點(diǎn)，太復(fù)雜太專業(yè)也沒有必要：液晶電視屏幕主要由液晶顯像玻璃板覆蓋在背光源上組成的(啥偏光片導(dǎo)光板與本文無關(guān)不提了）。你看到屏幕亮，主要是由液晶屏幕背面的背光源照亮的，而這個背光源，以前用的是熒光燈CCFL(冷陰極熒光燈，教室里常見的日光燈就是)，后來技術(shù)更新，背光源改為LED燈珠了。改用LED做液晶電視的背光源，可以使得畫面更好，壽命更長，屏幕面板也可以做更薄，制造工藝也更環(huán)保，不像熒光燈那樣有污染。所以綜合而言LED燈做液晶電視的背光源是更質(zhì)量的選擇。</p><p> 中等黃綠色；R5，淡藍(lán)綠色；R6，淡藍(lán)色；R7，淡紫藍(lán)色；R8，淡紅紫色；R9，飽和紅色；R10，飽和黃色；R11，飽和綠色；R12，飽和藍(lán)色；R13，白種人膚色；R14，樹葉綠；R15，黃種人膚色。其中R9的飽和紅色，是現(xiàn)階段白光燈珠的主要考核指標(biāo)。Ra:前面8種顏色的平均值；Re：全部15種顏色的平均值；同樣的晶片大小，如果想要得到的CRI越高，就需要在熒光粉上面增加R9的紅粉，但是會造成總體光通量的變小。科普貼丨顯色指數(shù)CRI到底是什么你真的懂嗎？/a/_729145ra（顯色指數(shù)(Ra)）_百度百科ra是顯色指數(shù)。為了對光源的顯色性進(jìn)行定量的評價，引入顯色指數(shù)的概念。以標(biāo)準(zhǔn)光源為準(zhǔn)，將其顯色指數(shù)定為100，其余光源的顯色指數(shù)均低于100。...baike./item/ra/2870726眩光UGR待整理。[圖文]眩光指數(shù)(UGR)介紹-百度文庫在線互動式文檔分享平臺，在這里，您可以和千萬網(wǎng)友分享自己手中的文檔，全文閱讀其他用戶的文檔，同時，也可以利用分享文檔獲取的積分下載文檔wenku./view/LED燈珠的串并方式串聯(lián)用電器首尾依次連接在電路中。特點(diǎn):電路只有一條路徑,任何一處開路都會出現(xiàn)開路。同樣LED燈珠串聯(lián)時：電壓疊加，額定電流不變。LED，就選上海先盛照明電器有限公司，有需要可以聯(lián)系我司哦！</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南大功率LED咨詢問價,LED" src="https://tyunfile.71360.com/WaterMark/UploadFile/shxiansheng/637402595863619471/403425.png"></div><p>于是前幾年就大力宣傳LED背光的液晶電視，營銷名詞很快就變成“LED電視”了，這就是“LED屏幕”錯誤叫法的形成原因，希望大家不要再搞錯了，LCD才是液晶電視，LED只是液晶電視的背光源而已，現(xiàn)在幾乎液晶電視都是用LED做背光源了。拓展知識——LED屏幕有嗎？有相信大家都見過，這就是真正的LED屏幕了。還有更高級的Micro-LED技術(shù)，將（無機(jī)發(fā)光二極管）LED燈珠縮小到微米級別，每個微小的LED燈珠就是一個像素點(diǎn)，直接由這種微米級（無機(jī)發(fā)光二極管）LED燈珠組成屏幕面板，是不是跟目前常見的OLED電視的構(gòu)造很像？OLED是有機(jī)發(fā)光二極管，采用無機(jī)發(fā)光二極管的Micro-LED技術(shù)做電視屏幕，亮度比OLED更高，壽命更長，發(fā)光效率更高更省電，相信不久的將來，我們就會看到這樣的產(chǎn)品量產(chǎn)面世（不會燒屏哦）。上海先盛照明電器有限公司致力于提供LED，歡迎新老客戶來電！湖南防水LED廠家</p><p style="text-indent:25px">上海先盛照明電器有限公司是一家專業(yè)提供LED的公司。河南大功率LED咨詢問價</p><p>led是電光源發(fā)出的光通量和它用電功率之比，單位是流明/瓦（lm/W），是評價電光源用電效率主要的技術(shù)參數(shù)。分為兩個概念：LED器件光效：LEDSource一般LED生產(chǎn)企業(yè)給出的器件光通量大多是Tj（結(jié)溫）=25℃時，給出的光效值。一般都有130-150lm/W,甚至到180lm/W。而在同樣功率下，LED輸出光通量根據(jù)溫度升高而降低，大約LED的PN結(jié)溫度Tj每升高1℃，輸出光通量下降。以100lm的燈珠計算，Tj=80℃的時候，實(shí)際光通量是，降低了。LED燈具光效：LEDLuminareLED燈具，一般包含以下幾部分：LED光源/燈珠，驅(qū)動器，配光器件，散熱裝置和外殼。這四個部分除了光源之外，其余三個部分都是對光效有減弱效果的。計算：一般計算，采用不同燈珠排列的總LED器件光效或者流明，是可以疊加的。如：100個100lm/W的光源，加上100W電功率，輸出的總光通量為10000lm。其他的三個部分：LED驅(qū)動器：LED驅(qū)動電源的電源效率（轉(zhuǎn)換效率），因?yàn)轵?qū)動電源一般是AC/DC的電源，自身需要消耗電功率。對于驅(qū)動器來說，輸出功率與輸入功率的比值，就是電源效率。一般隔離驅(qū)動的效率在82-88%左右，越接近設(shè)計大值，效率越高。一般非隔離驅(qū)動的效率在90-93%左右。河南大功率LED咨詢問價</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2185311.html</p></div></div></div></div></div><div id="c22seln" class="page-right twoColRt"><div id="gfcubd8" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="edas2jx" class="recomPic 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