Backlight module, display device and driving method thereof

A method for driving a display device comprising a liquid crystal module and a backlight module,

• said backlight module including a controller and a plurality of subarea backlights, wherein each of the subarea backlights includes at least two light sources driven independently and having different colors, and the controller is configured to control the respective turn-on time of the light sources of different colors in each subarea backlight,
• the method including, in a frame of image displayed by the display device:
• determining, based on the frame of image, the respective turn-on time of light sources of different colors in each subarea backlight of the backlight module in this frame and the driving voltage of each sub-pixel unit in the liquid crystal module, through the image information processing unit;
• turning on, based on the determined turn-on time, the light sources of different colors in each subarea backlight of the backlight module, through the controller in the backlight module;
• and
• driving, based on the determined driving voltage, each sub-pixel unit in the liquid crystal module, through the signal processor.