Note that it's LED, with each segment driven continuously with a variable voltage for brightness control. Even most LED drivers are multiplexed, with each segme

Note that it's LED, with each segment driven continuously with a variable voltage for brightness control. Even most LED drivers are multiplexed, with each segment flashing for a short time then going dark. This uses a separate dedicated buffer for every segment. This design is important for working well with high-speed cameras, an obvious use.