- LED Displays
LED displays, or light-emitting diode displays, are alpha-numeric readouts that glow in the dark. The use of digital displays in calculators, watches, and all forms of instrumentation is increasing day by day. We can see LED displays in railway stations, airport traffic signals, stock exchanges, clocks, and almost everywhere. It has thus contributed to the current extensive interest in devices that will emit light when properly biased. The two types in common use today are the light-emitting diode (LED) and the liquid-crystal display (LCD).
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