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发光二极管是电子制作中常用的电子元件之一,对其极性识别是重要的。发光二极管的极性判别可以从管脚和管子内部结构来判别,如果管脚不是被剪过的,目前普遍认为发光二极管的长管脚是正极,短管脚是负极,和立式电解电容的极性辨别是一致的。从管芯内部结构来看(如图1),管芯是由大小瓣两部分组成,大瓣上有一圆锥坑以便聚光提高亮度,中间通过一细金属线将两瓣连在一起,与管芯小瓣部分相接的是长脚正极,与管芯大瓣部分相接是短脚负极。
LED is one of the electronic components commonly used in electronic production, its polarity identification is important. The polarity of light-emitting diode can be judged from the internal structure of the pin and the tube. If the pin is not cut, it is generally accepted that the long pin of the light-emitting diode is positive, the short pin is negative, and the vertical electrolytic capacitor Polarity discrimination is consistent. From the internal structure of the die point of view (Figure 1), the die is composed of two parts of the size of the valve flap on the large hole in order to improve the brightness of the condenser, the middle of the two petals together by a thin metal wire, and the tube Part of the core petals are connected to the long pin positive, and the large part of the die is connected to the short pin negative.