Laser backlight for narrow-frame edge-lit type liquid crystal display

A laser backlight for a narrow-frame edge-lit type liquid crystal display, comprising a visible laser group, a beam shaping device, a reflector and a liquid crystal display light guide plate;

• wherein
• the visible laser group is mounted on a back surface of a liquid crystal display housing, a front surface of the liquid crystal display housing is attached to the liquid crystal display light guide plate, the visible laser group has a specific optical length away from a lateral light-permeable surface of the liquid crystal display light guide plate, and after being reflected by the reflector to change a laser propagation direction by 180 degrees, laser beams emitted by visible lasers are incident on the liquid crystal display light guide plate through the light-permeable surface;
• when being incident on the lateral light-permeable surface of the liquid crystal display light guide plate via the reflector, the visible laser beams emitted by the adjacent visible laser groups generate a light overlap larger than 10% of an area of each light spot, and a sum of lengths of laser spots of the visible laser groups at a same waveband on the lateral light-permeable surface of the liquid crystal display light guide plate is greater than or equal to 0.65 times of the length of the light-permeable surface;
• the beam shaping devices are present between the visible laser groups and the reflectors and between the reflectors and the lateral light-permeable surface of the liquid crystal display light guide plate;
• and the beam shaping devices adjust a divergence angle of the visible laser beams.