Backlight Module Having Brightness Enhancement Design at Periphery of Display Surface

摘要

A backlight module includes a supporting plate, a light source module, and an optical modulation film. The light source module includes a plurality of light sources disposed on a supporting surface of the supporting plate. The optical modulation film is disposed above the light source module and has a plurality of light emitting holes. Light from the light source module is distributed by the optical modulation film and emitted via light emitting holes at different positions. The optical modulation film has a periphery area and a central area. An average perpendicular distance between the periphery area and the supporting surface is different from an average perpendicular distance between the central area and the supporting surface.