LCD (Liquid Crystal Display) screens are very similar to LEDs (Light Emitting Diode) and even the principle of their operation is not much different: the difference is the light source behind the screen. Liquid crystal display screens use neon lights, while LED screens use light-emitting diodes. Another important thing is that, unlike LCD, LED screens can save up to 50-70% of electricity consumption.

LED screens, that can come in a variety of forms, are used for provision of information and advertising in various locations: on roads, in shops, gas stations, pharmacies and public transport, or simply used as dynamic visual signage. Apart from that, LED screens may display not only static but also dynamic images (video) and relevant additional information, e.g., air temperature, this way gaining even more attention of passers-by. All required information is organised on a computer using special software and transferred by simply inserting a USB memory stick into the USB slot on the rear side of the screen housing. The management is truly simple.

The brightness of LED screens enables to use them outdoors, where the signage and advertisement stands of shops are visible even in the sun. In recent years, these screens are also widely used in public transport destination signs, as well as variable message signs on highways. LED screens can also provide general lighting without any visual display when used, for example, for stage lighting or other decorative (not only informational) purposes. LED screens can offer a higher contrast ratio than a projector, providing an alternative to traditional projection screens, as well as they can be used for large continuous (without visible grids of individual screen frames) video walls.