Ph10mm outdoor smd 3-in-1 full color LED display panel details SMD(Surface Mounted Device) is a method for constructing electronic circuits in which the light chips are mounted directly onto the surface of printed circuit boards. Our use this technology in indoor LED display have a long time, and ours best new way is used it in outdoor screens. Each SMD pixel consists of red, green, and blue diodes mounted on a chipset, which is then mounted on the driver PC board. The diodes are very small and are set very close together. The difference is that the maximum viewing distance is reduced by 25% than common led display but advanced by 50% than indoor led display with the same solution