Abstract: A surface light source assembly includes at least one light emitting element, a light guide plate and a reflective sheet. Each of the light emitting elements has an annular light emitting side surface. The light guide plate has a bottom surface and a light exit surface opposite to the bottom surface. The bottom surface has at least one accommodating recess to accommodate at least one light emitting element. Each of the accommodating recesses has a light incident surface. The bottom surface further has a flat portion and at least one inclined surface portion. Each of the inclined surface portions is connected between the flat portion and the light incident surface of the corresponding accommodating recess. The reflective sheet is disposed below the flat portion. A light source module having the surface light source assembly is further provided.

Abstract: A backlight module includes a plurality of surface light source assembly. Each surface light source assembly includes a light source with a plurality of light emitting surfaces having a light emission angle range each; a light guide plate with a bottom surface having a groove for receiving the light source, a light exit surface opposite to the bottom surface, and at least one side surface between the bottom surface and the light exit surface; and a plurality of groove structures configured to reflect a portion of a light emitted from the light emitting surfaces to outside their light emission angle range.

Abstract: A surface light source assembly includes at least one light emitting element, a light guide plate and a reflective sheet. Each of the light emitting elements has an annular light emitting side surface. The light guide plate has a bottom surface and a light exit surface opposite to the bottom surface. The bottom surface has at least one accommodating recess to accommodate at least one light emitting element. Each of the accommodating recesses has a light incident surface. The bottom surface further has a flat portion and at least one inclined surface portion. Each of the inclined surface portions is connected between the flat portion and the light incident surface of the corresponding accommodating recess. The reflective sheet is disposed below the flat portion. A light source module having the surface light source assembly is further provided.

Abstract: A surface light source assembly includes at least one light emitting element and a light guide plate. Each light emitting element has an annular light emitting side surface. The light guide plate has a bottom surface and a light emission surface opposite to each other. The bottom surface has at least one accommodation groove to accommodate the at least one light emitting element. The accommodation groove has a light incident surface. The light incident surface surrounds the annular light emitting side surface of the light emitting element located in the accommodation groove. The light emission surface of the light guide plate is a convex surface. A backlight module having a plurality of above light source assemblies is also provided. The surface light source assembly and the backlight module of the invention can enhance the luminance uniformity and suppress the light leakage at the edge of the light guide plate.

Abstract: A surface light source assembly includes a light source and a light guide plate. The light source has a plurality of light emitting surfaces. Each of the light emitting surfaces has a light emission angle range. The light guide plate has a bottom surface, a light exit surface opposite to the bottom surface, and at least one side surface connected between the bottom surface and the light exit surface. The bottom surface has an accommodation groove for accommodating the light source. The light emitting surfaces face the at least one side surface. The light guide plate further has a plurality of groove structures located within the light emission angle range of the light emitting surfaces to reflect a portion of a light emitted from the light emitting surfaces to outside the light emission angle range. A backlight module including a plurality of aforementioned surface light source assemblies is also provided.