Display device with light sources and display method thereof

A display method of a display device, comprising following steps:

• providing a display device, wherein the display device has a main display area and a function-adding area and comprises a backlight module and a display panel disposed on a light-emitting side of the backlight module, the function-adding area is configured for sending and receiving channel of ambient light for an under-screen camera, the backlight module comprises an optical film set and light sources, the optical film set comprises at least one optical film, the light sources are disposed on at least one end of the optical film set that is perpendicular to the light-emitting side of the backlight module, and the light sources comprise first light groups and second light groups;
• each of the first light groups is disposed between every adjacent two of the second light groups;
• a spacing is defined between each of the first light groups and one of the second light groups adjacent to the each of the first light groups, the spacing gradually decreases along a direction away from the function-adding area;
• and
• entering a functional mode, controlling the first light groups to be turned off, controlling the second light groups to be turned on, and forming a first dark zone on the optical film set, wherein the function-adding area is located within the first dark zone;
• edges of light-emitting surfaces of the second light groups adjacent to both sides of the first light groups meet at a vertex, an area of the optical film set surrounded by the edges of the light-emitting surfaces is defined as the first dark zone;
• a light-emitting angle of the second light groups is greater than or equal to 90 degrees and is less than or equal to 120 degrees, and a light-emitting angle of the first light groups is greater than the light-emitting angle of the second light groups.