The invention provides a display driving module, a control method thereof and a display driving
system. The display driving module executes a control method and comprises an adjustable frequency oscillator and a correction unit, and the correction unit outputs
frequency correction information to enable the adjustable frequency oscillator to generate a gray scale
clock signal with the frequency within a target frequency range. The
pulse width modulation unit generates a pulse width
control signal according to the gray scale
clock signal and driving information, and a driving output unit receives the pulse width
control signal and outputs a driving
signal according to the pulse width
control signal; a display driving
system comprises more than two driving modules, and the two driving modulesrespectively comprise non-synchronous oscillators with different frequencies, so that the two gray-scale
clock signals cannot be switched synchronously, high-
frequency noise of the two driving signals is prevented from being generated at the same time, EMI (electro-magnetic interference) frequency spectrums of the driving signals can be dispersed. And the
glitch noise of the
frequency spectrum ofthe EMI at a specific frequency is reduced.