Backlight module and display device

A backlight module, comprising:

• a light source assembly configured to emit light beams of different colors, the light beams of different colors comprising a light beam of a first color and a light beam of a second color;
• a light guiding plate comprising:
• a plurality of light incident portions configured to receive the light beams of different colors, and
• a light emergent surface,
• wherein a plurality of pixel backlight regions are provided on the light emergent surface, and each pixel backlight region comprises a plurality of light extraction devices which comprise:
• at least a first light extraction device configured to guide the light beam of the first color in the light beams of different colors from the plurality of light incident portions to exit from the light emergent surface;
• and at least a second light extraction device configured to guide the light beam of the second color in the light beams of different colors from the plurality of light incident portions to exit from the light emergent surface;
• wherein the light source assembly comprises:
• a first light source configured to emit the light beam of the first color;
• a second light source configured to emit the light beam of the second color;
• and
• a third light source configured to emit a light beam of a third color, and the plurality of light incident portions comprise:
• a first light incident portion configured to receive the light beam of the first color,
• a second light incident portion configured to receive the light beam of the second color, and
• a third light incident portion configured to receive the light beam of the third color,
• wherein the plurality, of light extraction devices further comprise at least a third light extraction device, and the first light extraction device is configured to guide the light beam of the first color from the first light incident portion along a direction perpendicular to the light emergent surface to exit from the light emergent surface, the second light extraction device is configured to guide the light beam of the second color from the second light incident portion along the direction perpendicular to the light emergent surface to exit from the light emergent surface and, the three light extraction device is configured to guide the light beam of the third color from the third light incident portion along the direction perpendicular to the light emergent surface to exit from the light emergent surface;
• and
• wherein the light emergent surface further comprises an incident light deflection region, and the incident light deflection region is provided with:
• a plurality of first deflectors configured to deflect the light beam of the first color from the first light incident portion toward the plurality of first light extraction devices, respectively;
• a plurality of second deflectors configured to deflect the light beam of the second color from the second light incident portion toward the plurality of second light extraction devices, respectively;
• and
• a plurality of third deflectors configured to deflect the light beam of the third color from the third light incident portion toward the plurality of third light extraction devices, respectively.