Self-adapting dynamic backlight control system and method based on image content

The invention discloses a self-adapting dynamic backlight control system and method based on image content. According to image content, a plurality of backlight regions are control independently, therefore the effects are achieved that power consumption is lowered and frame contrast is raised. A video stream is divided into two paths: one path is used for calculating backlight brightness, and the other path carries out liquid crystal compensation. In the backlight brightness calculation path, a histogram statistic module carries out statistics of image brightness, weighted average of the maximum value and the average value of the corresponding regions is carried out and backlight brightness information of the current region is obtained. Through a set threshold determination condition, the brightness is adjusted, final brightness information is obtained, adjustment by an output control module is carried out, and output through a serial data flow is carried out. In addition, because an image content distortion phenomenon can happen after backlight modulation, compensation of the original video signal is carried out according to the obtained backlight brightness information in the liquid crystal compensation path, and screening display as a final video signal is carried out.