Segment LCD is suitable for places where there is not much display content, such as the dashboard of electric bicycles, the display of kitchen appliances, etc. These display screens only display numbers that change, and other contents can use fixed icons. If ordinary dot matrix LCD is used, it will undoubtedly waste some power consumption to display fixed icons, while segment display can perfectly solve this problem. When customizing segment LCD, the fixed content is made into special segments, each segment is controlled by a pin, and the function switch is indicated by turning on or off these segments, which is not only conducive to human-computer interaction, but also shortens the development time of the screen.