Backlight module and display device

A backlight module, comprising:

• a backplane, a bezel, a protrusion and a plurality of dimming film layers, wherein the bezel is connected to the backplane and comprises:
• a fixing structure and a plurality of bezel sidewalls on which the fixing structure is disposed, the fixing structure has an orthographic projection on the backplane located within an orthographic projection of the bezel sidewalls on the backplane, the plurality of bezel sidewalls and the backplane define an accommodation space in which the dimming film layers are provided, and the protrusion is fixedly disposed on a side surface of at least one of the dimming film layers and fixed to the bezel sidewalls via the fixing structure,
• wherein one of the plurality of dimming film layers is a light guide plate, the protrusion comprises:
• a first sub-protrusion fixedly disposed on a side surface of the light guide plate, and the fixing structure comprises:
• an engaging slot formed in the bezel sidewalls, into which the first sub-protrusion is engaged,
• wherein the engaging slot has a bottom wall opposite to the backplane and pressed on the first sub-protrusion, and
• wherein the engaging slot is concave from a surface of the bezel sidewalls opposite to the backplane and does not penetrate the bezel sidewalls, and is configured to be suitable for inserting the first sub-protrusion into the engaging slot when installing the light guide plate.