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串联 HBLED电路中每只 LED电流相同,不过正向压降不同(其值位于 4V 区间内),因此一串 HBLED 的累积电压会迅速增加.为防止面板的供电电压超过预期值,一般面板同时采用串联与并联 LED 网络.500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/63/2449771205985564.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">
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