Commonly used LED displays include LED status displays (commonly known as light-emitting diodes), LED seven-segment displays (commonly known as digital tubes), and LED sixteen-segment displays. The LED can display two states for system status display; the digital tube is used for digital display; and the LED sixteen segment display is used for character display.
1. Introduction to digital tube
1) Digital tube structure
The digital tube is composed of 8 light-emitting diodes (hereinafter referred to as fields), which can be used to display numbers 0 ~ 9, characters A ~ F, H, L, P, R, U, Y, symbol "-" and decimal point. ." The outline structure of the digital tube is shown in the figure below. The digital tube is divided into two structures: a common cathode and a common anode.
2) How digital tubes work
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