Light source assembly, backlight module and display device

The invention provides a light source assembly, and a backlight module and display device including the light source assembly. The light source assembly includes multiple light emitting diode light sources and light guiding plates; the light-emitting surface of each light emitting diode light source includes a convex surface, wherein the light-emitting surfaces are used for emitting backlight; thelight entering surfaces of the light guiding plates include multiple concave surfaces corresponding to the light-emitting surfaces of the light emitting diode light sources one by one; and the lightemitting diode light sources are respectively embedded into the concave surfaces of the light guiding plates to make the concave surfaces fit with the convex surfaces of the light emitting diode lightsources. The light extraction divergence angles of the light emitting diode light sources can be increased through the provided light source assembly; the distance of light mixing between the light emitting diode light sources