LED is the abbreviation of Light Emitting Diode. LED applications can be divided into two categories: one is LED display; the other is LED single tube application, including backlight LED, infrared LED and so on. As far as LED displays are concerned, China's design and production technology levels are basically in line with international standards. The LED display screen is a 5000 yuan computer configuration sheet of a display device composed of LED arrays. It adopts low-voltage scanning drive, which has the characteristics of low power consumption, long service life, low cost, high brightness, less failure, large viewing angle and long visible distance.