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50%'; } next.onclick = function(){if(curnum < imagecount - 1) {$('pic').src=imglist['url'][curnum+1];current_pic(curnum+1);}} next.title = ''; //cont.style.position = 'relative'; if(divappend == 1) { cont.appendChild(pager); pager.appendChild(pre); pager.appendChild(next); } } var onopen = 0; $('pic').onload = function(){ viewPhoto(); if(onopen == 0) { onopen = 1; } else { var imagepos = fetchOffset($('photo_pic')); document.documentElement.scrollTop = imagepos['top']; } } document.onkeyup = function(e){ e = e ? e : window.event; var tagname = BROWSER.ie ? e.srcElement.tagName : e.target.tagName; if(tagname == 'INPUT' || tagname == 'TEXTAREA') return; actualCode = e.keyCode ? e.keyCode : e.charCode; if(actualCode == 39) { $('pic-next').click(); } if(actualCode == 37) { $('pic-prev').click(); } } </script> <div id="p_btn" class="mtw mbm cl xs1" style="display:none;"> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=share&type=thread&id=89307" id="k_share" onclick="showWindow(this.id, this.href, 'get', 0);" onmouseover="this.title = $('sharenumber').innerHTML + ' 人分享'"><i><img src="static/image/common/oshr.png" alt="分享" />分享<span id="sharenumber">0</span></i></a> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=favorite&type=thread&id=89307" id="k_favorite" onclick="showWindow(this.id, this.href, 'get', 0);" onmouseover="this.title = $('favoritenumber').innerHTML + ' 人收藏'"><i><img src="static/image/common/fav.gif" alt="收藏" />收藏<span id="favoritenumber">0</span></i></a> <a id="recommend_add" href="forum.php?mod=misc&action=recommend&do=add&tid=89307&hash=005721b4" onclick="showWindow('login', this.href)" onmouseover="this.title = $('recommendv_add').innerHTML + ' 人支持'"><i><img src="static/image/common/rec_add.gif" alt="支持" />支持<span id="recommendv_add">0</span></i></a> <a id="recommend_subtract" href="forum.php?mod=misc&action=recommend&do=subtract&tid=89307&hash=005721b4" onclick="showWindow('login', this.href)" onmouseover="this.title = $('recommendv_subtract').innerHTML + ' 人反对'"><i><img src="static/image/common/rec_subtract.gif" alt="反对" />反对<span id="recommendv_subtract">0</span></i></a> </div> </td> <td valign="top" class="album_side_r"> <div class="album_side"> <div class="hm mtn mbn"> <a href="http://club.oecr.com/space-uid-12179.html" target="_blank" class="xi2"><img src="http://www.oecr.com/uc_server/avatar.php?uid=12179&size=small" /></a> <span class="tit_author"> <a href="http://club.oecr.com/space-uid-12179.html">li007</a> </span> </div> <div class="date"><span>发布时间:</span> 2009-6-30 16:49</div> <div class="album_info"> <h3>正文摘要: </h3> <p> 本帖最后由 li007 于 2009-7-14 19:53 编辑 各位看官： 这个问题没那么简单，大家自己模拟一下就知道了!!!! 本人目前模拟大功率LED是遇到个问题： 芯片本身发出蓝光实际测试10lm，加硅胶封装后测试12lm 但是 ...</p> </div> </div> </td> </tr> </table> </div> </div> <div class="bm vw pl" id="comment"> <div class="bm_h cl"> <h2>回复</h2> </div> <div class="bm_c"> <div id="postlistreply" class="xld xlda mbm"><div id="post_new" class="viewthread_table" style="display: none"></div></div><div id="post_1124001" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-84175.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=84175&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-84175.html" target="_blank" class="xi2">光杆司令</a><em id="author_1124001"> 发表于</em> <span class="xg1 xw0">2014-6-25 21:08:19</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1124001"> 感觉很深奥</td></tr></table> </div> <div id="comment_1124001" class="cm"> </div> <div id="post_rate_div_1124001"></div> </div> </dd> </dl> </div> <div id="post_1116271" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-158699.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=158699&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-158699.html" target="_blank" class="xi2">sa313</a><em id="author_1116271"> 发表于</em> <span class="xg1 xw0">2014-4-12 21:09:51</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1116271"> 是不是你设置的发光面的问题？LED芯片是主动层出光，在界面发生全反射，你这个模型似乎还是有点简陋哦</td></tr></table> </div> <div id="comment_1116271" class="cm"> </div> <div id="post_rate_div_1116271"></div> </div> </dd> </dl> </div> <div id="post_935432" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-114929.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=114929&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-114929.html" target="_blank" class="xi2">edwin.xyz</a><em id="author_935432"> 发表于</em> <span class="xg1 xw0">2011-10-4 00:24:54</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_935432"> 有些聽不懂，但謝了</td></tr></table> </div> <div id="comment_935432" class="cm"> </div> <div id="post_rate_div_935432"></div> </div> </dd> </dl> </div> <div id="post_810527" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-122332.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=122332&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-122332.html" target="_blank" class="xi2">wu4laohu</a><em id="author_810527"> 发表于</em> <span class="xg1 xw0">2011-5-15 11:36:54</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_810527"> 顶一下，不错不错....</td></tr></table> </div> <div id="comment_810527" class="cm"> </div> <div id="post_rate_div_810527"></div> </div> </dd> </dl> </div> <div id="post_600794" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-88783.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=88783&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-88783.html" target="_blank" class="xi2">wanggang000</a><em id="author_600794"> 发表于</em> <span class="xg1 xw0">2009-10-11 13:51:26</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_600794"> 芯片本身发出蓝光实际测试10lm，加硅胶封装后测试12lm6 @5 R0 ]/ S I/ N, ~6 N' ?<br /> 是因为led芯片本身的折射率与空气相比差距较大，导致全反射角很小，很多光能在芯片你部经过全反射损失掉了。* r X) F5 G* i/ }* c! q! R- M<br /> 加硅胶后增大了芯片的全反射角。</td></tr></table> </div> <div id="comment_600794" class="cm"> </div> <div id="post_rate_div_600794"></div> </div> </dd> </dl> </div> <div id="post_599962" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-98789.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=98789&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-98789.html" target="_blank" class="xi2">rcc2004</a><em id="author_599962"> 发表于</em> <span class="xg1 xw0">2009-10-9 09:19:16</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_599962"> xiyin0825 朋友的分析有一定道理 <br /> 还有楼主的实验很可能有误差</td></tr></table> </div> <div id="comment_599962" class="cm"> </div> <div id="post_rate_div_599962"></div> </div> </dd> </dl> </div> <div id="post_593756" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-64454.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=64454&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-64454.html" target="_blank" class="xi2">linmude</a><em id="author_593756"> 发表于</em> <span class="xg1 xw0">2009-9-15 21:27:39</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_593756"> 硅胶出来是白色吗?如果是蓝色,不可能大于10lm.可能是两次测试的误差,造成流明数的改变!</td></tr></table> </div> <div id="comment_593756" class="cm"> </div> <div id="post_rate_div_593756"></div> </div> </dd> </dl> </div> <div id="post_593476" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-88783.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=88783&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-88783.html" target="_blank" class="xi2">wanggang000</a><em id="author_593476"> 发表于</em> <span class="xg1 xw0">2009-9-15 13:01:38</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_593476"> 真的不知道哦.............</td></tr></table> </div> <div id="comment_593476" class="cm"> </div> <div id="post_rate_div_593476"></div> </div> </dd> </dl> </div> <div id="post_586410" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-47621.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=47621&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-47621.html" target="_blank" class="xi2">bigpiano</a><em id="author_586410"> 发表于</em> <span class="xg1 xw0">2009-8-25 21:23:30</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_586410"> 很好的讨论,学习了...</td></tr></table> </div> <div id="comment_586410" class="cm"> </div> <div id="post_rate_div_586410"></div> </div> </dd> </dl> </div> <div id="post_586333" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-69120.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=69120&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-69120.html" target="_blank" class="xi2">xiyin0825</a><em id="author_586333"> 发表于</em> <span class="xg1 xw0">2009-8-25 15:20:39</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_586333"> 是这样的，当芯片到空气直接出光的话，是光密介质到光疏介质，也就是折射率从2.3－1，因此在芯片内部会产生很多的全反射，但是加上透镜后，芯片通过透镜后到空气中，即折射率从2.3－1.41－1，因此反而会增加芯片的出光率，因此可以看到很多LED封装都是带透镜的。<br /> 至于楼主说在tracepro模拟中，光通量由10lm下降为9.6lm，那是因为模拟是，tracepro模拟的光是从芯片表面发出的，出光10lm，进过硅胶后有一定的光损耗，是正常的。这个过程中，是不包括芯片内部的全反射过程模拟的，因此会产生楼主所说的问题。</td></tr></table> </div> <div id="comment_586333" class="cm"> </div> <div id="post_rate_div_586333"></div> </div> </dd> </dl> </div> <div id="post_585283" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-95581.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=95581&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-95581.html" target="_blank" class="xi2">DC2009</a><em id="author_585283"> 发表于</em> <span class="xg1 xw0">2009-8-21 23:28:07</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_585283"> 這是一個很好的探討問題, 但是這個問題所提供的背景資料過於單純, 所以回答起來就很煩複.<br /> 首先要質疑這個數據的樣本數, 一般單顆樣本數據不足以當做整體變化趨勢.<br /> <br /> 其實不必找到真正原因, 依然可以讓未來仿真更符合實際:<br /> 多做一些樣品, 並分成不同不同點膠時間的對照組, 找出不同膠量和亮度變化的曲線, 然後將此變化和仿真結果之間的差異設為固定的 [差異值] (off-set), 在未來仿真結果再差異量的修正, 問題即可解決.<br /> <br /> 要找出真正原因之前, 先必需瞭解整個封裝結構和材料特性, 以及封裝前后材料之間的變化, 一一列出可能原因, 然後設計實驗, 從實驗數據中找出原因, 原因可能不只一個.</td></tr></table> </div> <div id="comment_585283" class="cm"> </div> <div id="post_rate_div_585283"></div> </div> </dd> </dl> </div> </div> </div> </div> <script type="text/javascript"> new lazyload(); </script> <div class="wp mtn"> <!--[diy=diy3]--><div id="diy3" class="area"></div><!--[/diy]--> </div></div> </div> <!--autocomment last=2025-12-24 10:17:28--> <div class="ft_wp"> <div id="ft" class=" cl"> <div id="flk" > <p> <a href="http://wpa.qq.com/msgrd?V=3&Uin=20600600&Site=光电工程师社区&Menu=yes&from=discuz" target="_blank" title="QQ"><img src="static/image/common/site_qq.jpg" alt="QQ" /></a><span class="pipe">|</span><a href="http://m.oecr.com" >手机版</a><span class="pipe">|</span><a href="http://so.oecr.com" title="站内搜索" target="_blank" >搜索</a><span class="pipe">|</span><a href="http://www.focaloptics.com" title="主办单位：武汉焦点光学技术有限公司" target="_blank" >焦点光学</a><span class="pipe">|</span><a href="http://www.oecr.com" target="_blank">光电工程师社区</a> ( <a 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