Brightness fusion automatic control method and system based on different display modes of display screen

The invention discloses a brightness fusion automatic control method and system based on different display modes of a display screen, and relates to the technical field of vehicle intelligent cabins. The method comprises the steps that in an automatic brightness adjusting mode, a vehicle body control system monitors a brightness light value provided by a sunlight and rainfall sensor outside a vehicle and a daytime/night mode, and judges whether the brightness light value is effective or not; and if the brightness light value is judged to be effective, the brightness of the display screen is linearly adjusted to a corresponding lumen value according to the brightness provided by the current sunlight and rainfall sensor. According to the invention, a plurality of control methods in an automatic brightness adjustment mode are provided according to other hardware capabilities of the vehicle, so that the hardware cost of the display screen is reduced, and meanwhile, the automatic brightness adjustment calculation