Constant-current drive output current is constant, and the output of DC voltage will vary with the size of the load resistance in a certain range, responsible for small resistance, the output voltage is low, responsible for the greater resistance, the higher the output voltage.
and constant voltage drive, is the output of the voltage is fixed, but the output of the current will be changed with the load or decrease.
In a comprehensive sense, constant-current drive products will be better, but also more expensive. Because of constant-current-driven products, it has a number of lines and chips, so that the current can be kept constant, increasing the life and stability of LED display.
