The invention discloses a display brightness adjustment method and related equipment. The method comprises: applying to an electronic device comprising a screen and a DPU, the DPU comprising N layer hardware and layer mixers, the N layer hardware comprising first layer hardware and M second layer hardware, N being an integer larger than 1, M being smaller than N, and each layer hardware being connected with the layer mixers. The method comprises the following steps: when an adjustment instruction for the backlight brightness of the screen is detected, setting the backlight brightness value ofthe screen as a first threshold value, then modifying the first layer to reduce the brightness of the first layer, then superposing the modified first layer with a plurality of second layers to obtaina third layer, and finally displaying the third layer through the display screen. By adopting the embodiment of the invention, the screen flickering effect can be reduced.