LED数码管是一种常用的数字显示器,它是将条状发光二极管LED共负(或共正)连接,而将另一极作为控制端分别引出组成“8”字形。LED数码管外观要求颜色均匀、无局部变色及无气泡等。在业余条件下可用干电池作进一步检查。LED数码管有共阴与共阳两种,如图所示。现以共阴数码管为例介绍其检查方法。 LED digital tube is a commonly used digital display, it is a strip of LED common negative (or common) connected, and the other as a control terminal leads to form a “8” shape. LED digital tube appearance requires uniform color, no local discoloration and no bubbles. Amateur conditions available dry batteries for further examination. LED digital tube has a total of yin and yang of two, as shown. To common cathode digital tube as an example to introduce its inspection methods.