It should be understood that, comparing with a situation that the predetermined picture includes a plurality of colors, the preset region of the display screen emits less light when the predetermined picture displayed by the preset region is a pure color picture. When the pure color picture is a full black picture, i.e., the pure color picture is a pure black picture, the preset region of the display screen emits the least amount of light, so that the display screen has the least influence on the ambient light sensor.

When the electronic device controls the preset region of the display screen to display the predetermined picture, such as a black picture, the light emitted by the preset region may be minimized to enter the ambient light sensor. Thereby, the influence of the display screen on the ambient light sensor can be reduced, and the accuracy of the ambient light sensor detection can be improved.

At block S130, the display screen is controlled to respond according to the ambient light intensity value.

After the electronic device obtains the ambient light intensity value detected by the ambient light sensor, light intensity of external environment may be determined according to the ambient light intensity value. The electronic device may control the display screen to respond according to the ambient light intensity value. For example, the electronic device may control brightness of the display screen according to the light intensity of external environment, such that the brightness of the display screen is adapted to the external environment light.