Screen-off energy-saving control method for constant-current LED display driving chip

The invention discloses a screen-off energy-saving control method for a constant-current LED display driving chip, and belongs to the field of LED display. The method comprises the following steps of: 1, selecting a chip display mode according to input data, wherein the chip display mode comprises a normal display mode, an effect priority mode or an energy-saving priority mode; step 2, in a normal display mode or an effect priority mode, dividing the display time of one frame into 2N GCLK periods according to the bit number N of the binary gray data; when the gray data is exactly divided by 4 or the remainder is 1, 2 and 3 after the gray data is exactly divided by 4, an optimization level K is determined, the whole display period, totally 2N clock periods, is scattered into a plurality of display sub-periods according to the gray data and the optimization level K, and then the gray data is averagely distributed to each sub-period; and in the energy-saving priority mode, the display is closed while the normal