The utility model relates to the technical field of backlight modules, and particularly discloses a novel backlight module which is characterized in that a
diffusion film is arranged in a back plate, a brightness enhancement film is arranged at one end, close to the
diffusion film, in the back plate, a
diffusion type brightness enhancement film is arranged at one end, close to the brightness enhancement film, in the back plate, and a stepped mounting groove is formed in the back plate; when the diffusion film, the brightness enhancement film and the
diffusion type brightness enhancement film are installed, the protruding blocks on one sides of the surfaces of the diffusion film, the brightness enhancement film and the
diffusion type brightness enhancement film are matched with the stepped installation groove of the back plate, the positioning lugs at the lower ends of the protruding blocks are matched with the limiting groove, and the diffusion film, the brightness enhancement film and the
diffusion type brightness enhancement film are staggered and located at the same vertical position. According to the mode, the use of the
adhesive tape is reduced, the positioning is convenient, the working efficiency is improved, the cost is reduced, the
film material can be prevented from being polluted and abraded, and the problems of
white spots, size thickening, bad lamp shadows and the like are reduced.