Outdoor LED displays use an array of light-emitting diodes (LED) to display computer-programmed text and images that can be easily changed and updated through suitable supporting software. Outdoor LED displays comprise LED display products such as LED billboards, mobile LED screens, perimeter LED displays, LED video walls for indoor/outdoor applications, and LED matrix displays. LED displays are used at TV studios, airports, aboard trains, bus stations, retail stores & shopping centers, sports stadiums & arenas, for concerts & live events, building facades, and on street promotion. Outdoor LED displays are available in two mounting technologies: surface mounted and individually mounted. Outdoor LED displays are produced in a wide range of colors which are commercially available in three forms namely monochrome display, tri-color display, and full-color display.