The LED module is a product composed of LEDs (light-emitting diodes) arranged according to a certain rule and then packaged with some waterproof treatments. LED modules can be divided into LED light-emitting modules and LED backlight modules. The LED backlight module mainly provides a uniform and high-brightness light source for the LCD panel. LED light-emitting modules are widely used in LED products, and there are also significant differences in structure and electronics. The simple thing is to use a circuit board and housing equipped with LEDs to become an LED module. Adding control, constant current source, and related heat dissipation treatment improves LED life and luminous intensity. As long as the LED module is used to display the display effect of advertising fonts and logos at night, it uses text or logos as the medium and is installed on the roof or wall of the building. It can display the logo during the day and use LED as a light source at night. It shows another effect, coupled with LED lighting application control system, dynamic video control of text or logo, in some places with an intense entertainment atmosphere, LED light source modules have become the most important choice for companies to show their self-image. LED module classification can be divided into: 1. According to the occasion of use, it can be divided into indoor, semi-outdoor, and outdoor modules. 2. According to the color, it can be divided into the single-color module, two-color module, and complete color module 3. According to the pitch, it can be divided into indoor P2.5, P3, p4, p5, P6, p7, p8, etc.; outdoor p10, p12, p16, p20 P25, etc. 4. According to the power of LED lamp beads: low power (under 0.3W), medium power (0.3-0.5W), high power (1W and above) 5. Divided from the distributor: in-line LED display module, indoor dot matrix LED display module, surface mount LED display module.