Backlight module set and area light source assembly thereof

The invention relates to an area light source assembly. The area light source assembly comprises at least one light-emitting element and a light guide plate; each of the light-emitting elements has anannular light-emitting side surface; the light guide plate has a bottom surface and a light exiting surface which are opposite to each other; the bottom surface has at least one accommodating groovefor accommodating the at least one light-emitting element; each accommodating groove has a light incoming surface; the light incoming surface surrounds the annular light-emitting side surface of the light-emitting element located in the accommodating groove; and the light exiting surface of the light guide plate is a convex surface. The invention further provides a backlight module set provided with the area light source assembly. With the area light source assembly and the backlight module set of the invention adopted, brightness uniformity can be improved, and the edge light leakage of the light guide plate can be su