In the wiring of LED display screens, the distinction between negative and positive poles is mainly based on the color of the power line. Generally speaking, the red line represents the positive pole (Vcc or +V), while the black line represents the negative pole (GND or -V). In addition, the ground line is usually yellow or green, but the ground line does not directly represent the negative pole, but is used as a safety grounding line.
During the wiring process, it is very important to ensure the correct connection of the power line, because incorrect connection may cause the display screen to burn or other damage. Therefore, before wiring, you should carefully read the relevant wiring instructions or consult professionals to ensure the accuracy and safety of the wiring.
In summary, in the wiring of LED display screens, the red line represents the positive pole, the black line represents the negative pole, and the ground line is usually yellow or green for safe grounding.