Light guide plate and manufacturing method thereof, backlight module

A manufacturing method of a light guide plate;

• wherein the light guide plate comprises a light guide plate body and lattice points, the light guide plate body being provided with a light output surface, wherein a receiving groove for receiving a light source is formed in a surface of the light guide plate body facing away from the light output surface thereof, a side surface and a bottom surface of the receiving groove forming a light input surface;
• the lattice points are distributed inside the light guide plate body along a plane parallel with the light output surface, a distance d between the lattice points and the surface of the light guide plate body facing away from the light output surface is greater than zero;
• the further the lattice points are distanced from the light input surface, the more densely they are distributed;
• and wherein the manufacturing method comprises:
• fixing the light guide plate body onto a worktable, and forming the receiving groove in the surface of the light guide plate body facing away from the light output surface;
• adjusting a pulsed laser component such that a focus of a laser pulse emitted by the pulsed laser component is situated inside the light guide plate body at a height for forming the lattice points, and adjusting the worktable to adjust the focus of the laser pulse emitted by the pulsed laser component to correspond to an initial position of the light guide plate body;
• turning on the pulsed laser component and actuating the light guide plate body with the worktable such that a material inside the light guide plate at a position of the focus of the laser pulse melts to form lattice points;
• the further the lattice points are distanced from the light input surface of the light guide plate, the more densely they are distributed.