Method and device for making net point of light guide plate

A method for manufacturing netted dots on a light guide plate, comprising:

• engraving, on a surface of a metal plate with a preset roughness, a female mould or a male mould corresponding to a shape of each netted dot on the light guide plate;
• coating the metal plate onto a surface of a roller;
• heating the roller so that a temperature of the metal plate rises to a preset temperature;
• adjusting a distance of a center of the roller in relation to a light guide plate feeding passage so that the metal plate applies a preset pressure onto the light guide plate to be embossed;
• and
• making the light guide plate to be embossed pass through the light guide plate feeding passage, wherein the metal plate transfer-prints a shape of netted dots of the female mould or the male mould onto the light guide plate to be embossed at a preset pressure and a preset temperature to form the netted dots on the light guide plate, a cross-sectional shape of each netted dot on the light guide plate comprising:
• two sharp teeth at both ends;
• two grooves, positioned to be adjacent to the two sharp teeth respectively, wherein each groove is in a direction of an inner wall of the sharp teeth;
• and
• a concave arc or a straight line, positioned between the two grooves and above a plane of the light guide plate.