Theoretical Analyse And Mathematical Modeling On LGP And BEF In LCD Backlighting System

When its display effect, especially its lightness and uniformity, could be improved, Liquid Crystal Display(LCD) will has a more prosperous market. Whereas, Liquid crystal itself isn't luminiferous. So it is cried for improving Backlighting system's lightness and depressing the losing of light energy.Basing on LCD's display theory, the paper analyzed several paths of losing light energy, when light transmits in LCD Backlighting system. Feasible approaches of improving effective light energy ratio is adequately demonstrated, such as: adding Brightness Enhancement Film(BEF), ameliorating Light Guide Plate(LGP), reusing polarization light, adding Enhanced Specular Reflector(ESR)and so on.To predominate the increasing luminance principle of BEF and decrease the outsourced costliness assembly, we have analyzed every parameters and their rules affecting prism film's ability of gathering beam by simulation program, and meliorated design is put forward, axial lightness can increase one time or more. The configuration design and the universal simulation program were completed by the combine of AutoCAD re-exploitation (LISP) and mathematical modeling. As a basis of that, it is convenience to simulate the LGP with any basso-relievo frame and scheme out configurations more adapting domestic procession.Polarization light is separated at light source so we can put the axe in the helve that the reflecting polarimeter is difficult to process. The scheme's structure is simple, and can be ameliorated in the future.The theoretical analyse concluded in this paper has been validated by cooperative company Fujian Shangrun Ltd. . The two-sided V-cut LGP which bands the predominance of BEF together and the stochastic meshy point LGP are on little batch stream. They are stocked by many domestic and foreign companies.