Split-flap display
electromechanical display device / From Wikipedia, the free encyclopedia
A split-flap display, or a flap display, is a digital electromechanical display device that shows changeable alphanumeric text, and sometimes graphics.
They are commonly used as public transport timetables in airports or railway stations.
Commonly they are called Solari boards after Italian display manufacturer Solari di Udine, or in Central European countries they are called Pragotron after the Czech manufacturer instead.
Split-flap displays were once commonly used in consumer digital clocks known as flip clocks.