a front light module, comprising:

a light source, configured to provide an illumination beam; and

a light guide panel, located on a transmission path of the illumination beam, wherein the light guide panel has a first surface and a second surface opposite to each other, the light guide panel comprises a plurality of microstructures, the plurality of microstructures are recessed into the light guide plate in a direction from the first surface to the second surface to form a plurality of voids, and a maximum vertical distance between each of the plurality of voids and the first surface is a first depth;

a touch panel, wherein the first surface faces the touch panel; and

an optical adhesive layer, adhered between the touch panel and the first surface of the light guide panel, wherein a surface of the optical adhesive layer facing the light guide panel has a plurality of first regions and a plurality of second regions, wherein in the plurality of first regions, the surface of the optical adhesive layer facing the light guide panel is in contact with the first surface of the light guide panel, wherein in the plurality of second regions, the surface of the optical adhesive layer facing the light guide panel and the plurality of microstructures being overlapped, a ratio of a vertical distance between the plurality of first regions and the plurality of second regions to the first depth is 0 to 0.7, and a refractive index of the optical adhesive layer is less than a refractive index of the light guide panel.