Driving circuit of display screen

The embodiment of the utility model provides a driving circuit of a display screen, which comprises a power supply module, a voltage reduction module, a control switching circuit, a driving control circuit and a display module, and the display module comprises a first display module and a second display module. The power supply module is connected with the first display module, the power supply module is also connected with the step-down module, the step-down module is also connected with the second display module, and the step-down module is also connected with the driving control circuit; the drive control circuit is connected with the display module, and the control switching circuit is connected with the display module. According to the driving circuit of the display screen, the power supply with one voltage value is adopted, the voltage reduction module is used for providing different output voltages for the first display module, the second display module and the driving control circuit, and the purposes