A high-brightness LED backlight display front-end module is introduced. It uses a high-brightness LED light-emitting matrix driven by a constant current source as the backlight source, replacing the traditional CCFL backlight source. The application and performance of the two backlight sources are described in the article. In comparison, the switching regulator LM2733 of NS Company is introduced. The chip is used as a constant current source drive chip in the display module. This module uses a single-chip microcomputer to generate pulse width modulation pulses for brightness adjustment, and realizes the output of the relevant screen. And control.