Optical Design And Parameters Optimization Of HSOT Light Guide Plate For LCD

With the fast developing technology, backlight becomes brighter, thinner and more integrated, while Highly Scattering Optical Transmission Polymer (HSOT) light guide plate (LGP) combines all these superiority together. HSOT LGP could not only increase the luminance and uniformity of backlight but also reduce the cost of the backlight system with fewer optical films.Due to the high cost of mold producing, it is necessary to simulate the optical regulations with related software before exploiting LGP in practice. The optical designing method is not perfect and popular for the relatively complex light propagating law in the HSOT LGP and parameters of varying materials and structures affecting optical characters of LGP. This thesis will analyze the law of light propagates in the HSOT LGP in detail, summarize the relationship between the optical characters and the material parameters of the HSOT LGP, achieve optimized parameters fit for HSOT LGP and the corresponding method. We hope the results will provide supporting and consultations for experiment and practice.This thesis analyzed the law of light propagates in the HSOT LGP, imported a function called sending out efficiency to describe the results leaded by the structure parameters as a whole, and discussed how the structure parameters effect the optical characters in quality. By using the Monte Carlo ray tracing method, a sequential ray-tracing and modeling simulation program is proposed to research the different optical characters between different materials of LGP. The different optical characters between different materials of LGP are depended on the percentage, diameter and the material of the scatter particle. By preparing the difference characters between different material parameters, a designing method of HSOT LGP could be proposed. We propose that the optical characters such as color uniform and front direction light intensity of HSOT polymer backlight system with particles smaller than micrometer is better than backlight system with conventional micrometer particles material. And through Mie scattering theory, we explain how the smaller particle material could solve the direction problem of the light radiating from backlight system.