Led segmented display is composed of many light-emitting diodes packaged together to form an "8" shaped device. The wires have been connected internally, and only their strokes and male electrodes need to be drawn out. In fact, the digital tube is a figure of eight composed of seven light-emitting tubes, and the decimal point is 8. These segments are represented by letters A, B, C, D, E, F, G and DP respectively.