Structural Optical Film and Backlight Module

A backlight module, comprising:

• a structural optical film, comprising a structural optical body and a structural layer, wherein the structural optical body comprises a first light-emitting surface and a first bottom surface opposite to each other, the structural layer is disposed on the first bottom surface, the structural layer comprises a plurality of first strip structures and a plurality of optical diffusion structures, the first strip structures are arranged at intervals, and the optical diffusion structures are disposed between the first strip structures, respectively;
• a composite film, disposed on one side of the structural optical film adjacent to the first light-emitting surface, wherein the composite film comprises a second light-emitting surface and a second bottom surface opposite to each other, the second bottom surface faces the first light-emitting surface of the structural optical film, and the composite film further comprises a plurality of second strip structures disposed on the second light-emitting surface and an anti-absorption layer disposed on the second bottom surface;
• a brightening film, disposed on one side of the composite film adjacent to the second light-emitting surface, wherein the brightening film comprises a third light-emitting surface and a third bottom surface opposite to each other, the third bottom surface faces the second light-emitting surface of the composite film, and the brightening film further comprises a plurality of third strip structures disposed on the third light-emitting surface;
• a light guide plate, disposed on one side of the structural optical film adjacent to the first bottom surface, wherein the light guide plate comprises a light incident surface, an upper surface, and a lower surface opposite to the upper surface, and the upper surface faces the first bottom surface of the structural optical surface;
• and
• a plurality of light-emitting elements, disposed on one side of the light guide plate adjacent to the light incident surface, wherein the light-emitting elements are arranged along a light source arrangement direction.