LED, or light-emitting diode, is a light-emitting device made of semiconductor homogeneous PN junction, heterogeneous PN junction, metal-semiconductor (MS) junction, and metal-insulator-semiconductor (MIS) junction. LED dots light up, and can be described as a large number of pixels, with a space that is adjustable. By using smart control throughout the work, the flashing of light produces the look of dots onto surfaces. In some ways it could substitute a display with a certain specification however the price is less than that of the display. More info: https://www.suntechleds.com/info/what-is-led-pixel-dot-light-56883706.html