The common driving methods are constant voltage drive and constant current drive, constant voltage drive is to drive with a constant voltage input, lit the screen. This approach is rare. Constant current drive is to use constant current to provide driving, lighting large screen. The usual scanning methods are 1 / 8, 1 / 4, 1 / 16. These so-called scanning mode refers to the similar several same color lamp with a driving chip for driving control. Of course, that high the brightness and refresh rate of the drive chip, the higher the cost. Generally 1 / 8 is a good choice.