Design of net dots in laser direct writing light guide plate based on image processing technique

In order to obtain light guide plate(LGP) with uniform surface illumination efficiently, using the design method based on gray image processing technique and using TracePro software, the model with two unilateral incident light-emitting diodes was analyzed theoretically and verified by simulation. Simulation data of output surface illumination was obtained. The results show that LGP designed by the method presented in this paper can reach 86.7% of illumination uniformity, conforming to the standard of Commission Internationale de I'Eclairage. The illumination uniformity can improved to 91.9% after modifying the gray image locally. This study is helpful for the design of LGP with high illumination uniformity more effectively.