Backlight module and display device

A display device, comprising a backlight module, the backlight module comprising:

• a light guide plate, comprising a first bottom surface and a light exiting surface which are arranged opposite to each other and a light incident surface connecting the first bottom surface and the light exiting surface, wherein the first bottom surface of the light guide plate is provided with a plurality of dot structures, and the dot structure comprises a first inclined surface forming a first included angle with the first bottom surface;
• a backlight source, located on a side of the light incident surface, wherein the backlight source is configured to emit light, the light emitted by the backlight source is incident to the first inclined surface, and an included angle between the light emitted by the backlight source and a horizontal line is a second included angle;
• and
• a first prism layer, located on a side of the light exiting surface of the light guide plate, wherein the first prism layer comprises a plurality of first prisms arranged in parallel with the light incident surface, the first prism comprises:
• a second bottom surface arranged in parallel with the first bottom surface and a second inclined surface connected with the second bottom surface, and an included angle between the second inclined surface and the second bottom surface is a first vertex angle;
• wherein
• the first vertex angle is an acute angle, and the first included angle, the second included angle and the first vertex angle satisfy that:
• the light emitted by the backlight source is incident to the first inclined surface and then reflected to the second inclined surface of the first prism, and a first incident angle between incident light reflected to the second inclined surface of the first prism and a normal of the second inclined surface is a Brewster angle.