Digital signage is actually a sub-sector of electronic signage (ESN). Most digital displays use advanced technologies like LED, LCD, projection, and LED. It is made up of an electronic display panel and a monitor, which are usually mounted on the walls of a building or on the roof. The digital signage can either display text or images.
As we all know, there are different types of screens that are used in electronic signage. For instance, there are digital signage screen panels, which are known as LCD screens, while the screens used in the projectors are referred to as plasma screens. Then, there are digital screens that use digital technology, and there are also digital screens that display pictures, text, or video. The main difference is that, in the first case, the screens have the pixels (a dot-matrix device) arranged in a grid, while in the second case, the pixels are arranged in a matrix. When there are a lot of pixels displayed in a matrix, this is referred as a CRT (Cathode Ray Tube), while LCD is the same but uses an inverter instead of a dot-matrix unit.
Digital signage also uses various kinds of software for its operation. These include software for controlling the system, for analyzing the data, and for generating the graphics. There are also hardware devices used to control the electronic screens.