A LED panel or LED module for LED screens, is a small circuit that integrates the LEDs and the rest of the necessary electronics so that the LEDs can reproduce images and videos.


The sizes of the LED modules or LED boards are generally defined by the pixelization of the modules.

For example, the most popular sizes according to pixel pitch are the following:

  • For multiple pixel 5mm module size is 320x160mm or 160x160mm
  • For multiple 4mm pixels, the size of the module is 256x128mm or 128x128mm
  • For multiple 3mm pixels, the size of the module or LED board is 192x192mm


Modules only have two connections, on the one hand, we have a 5V AC power supply and on the other, the multipin data input.

Each power supply feeds a group of LED modules and in the data part, these are sent to the modules from the controller card or Receiving Card.


Small LED modules can be installed in the structural frames or cabinets that make up the giant LED screen in several possible ways. Everything depends on the usage and installation of the screen.

Fixation with screws

The modules are attached to the cabinet structure by screws. This is the most standard and usual way on LED displays.

Magnetic fixation

For quick substitutions where maintenance has to be done in a few seconds. For this function, the screws are replaced by magnets.

Special mechanisms for fast extraction

In this case, the modules slightly larger than the standardized ones and integrate frontal drive systems in order to be removed from the frame or cabinet. These modules are only assembled on large LED screens installed on facades or building walls.


Electronic board:

Circuit with copper conductor tracks that interconnect its components. These plaques are assembled with fully automated integration processes. In the case of applications for LED screens that are resistant to rain, insulation and anti-humidity treatments are carried out to add an additional layer of protection. On the front, LEDs are inserted and, on the back, the ICs (chips or integrated circuits) are assembled, which manage the colour, brightness and all the aspects that allow the reproduction of images, as well as the data and power ports of the circuit.

Frontal mask:

It is a black plastic front piece. It has holes that match the position of the LEDS. Generally, it is assembled on the surface of the module with small screws.

The functions of this grid or mask in the LED modules are several:

  • “Protect” the LEDs by not leaving them completely uncovered on the circuit.
  • For outdoor LED screens, you usually add a visor type ledge on each LED to improve its visibility with direct sunlight.


Rear plastic structure:

Part of black plastic that gives rigidity to the printed circuit and allows its fixation on the chassis of the Cabinet LED. Rain resistant LED screens usually incorporate rubber gaskets to prevent water or moisture from entering the interior of the LED display.