A kind of side-emitting LED backlight light guide panel net dot design method

摘要

In this paper, the transmission principle of light crossing the light guide panel was analyzed and a calculating method of the net dot distribution was deduced according to the illumination distribution of LED. Using this method, the light guide panel net dot distribution of a small size backlight was calculated. And, in the light of net not distribution regulation, the net dot layout was optimized and simplified associating with area segmentation adjustment method. Optical model was made and ray tracing was done by optical design software, the simulation result indicate that the surface luminance uniformity of the backlight is 87% and the light efficiency is 71%, which is achieved by less LED sources and area segmentations compared with the same size backlight. The net dot of light guide panel sample was made by laser engraving. The luminance uniformity of testing is consistent with that of simulation.