The high refresh rate and more gray information are very important for using PWM to achieve grey level, such as full color LED screen. The standard LED display control system either realized good gray and the low refresh rate, or realized the high refresh rate and not achieving full gray information. A mean field segmentation method is proposed to achieve high intensity high refresh rate. To a certain extent, though brightness efficiency, about 10%~30% is reduced, gray display effect can be better improved and high dynamic refresh rate can be reached at the same time.