Classification of LED electronic video wall panel power supply

1、 The power supply of LED electronic screen can be divided into two categories according to the driving mode:

I Voltage stabilizing type:
1. After the voltage stabilizing circuit determines various parameters, the output is a fixed voltage, but the output current changes with the increase or decrease of the load
2. Although the voltage stabilizing circuit is not afraid of the open circuit of the load, it is strictly prohibited to completely short circuit the load
3. The voltage change after rectification will affect the brightness of LED
4. In order to make each string of LED display brightness driven by voltage stabilizing circuit uniform, it is necessary to add appropriate resistance
II Constant current type:
1. Constant current drive circuit is ideal to drive LED, but the disadvantage is that the price is high
2. Although the constant current circuit is not afraid of load short circuit, it is strictly prohibited to completely open the load
3. The output current of the constant current drive circuit is constant, but the output DC voltage changes in a certain range with the size of the load resistance
4. The use of LED electronic screen should be limited because it has the maximum withstand current and voltage