Study On The Microstructure Design Of Light Guide Plate And UV Curing Micro-Imprint Molding

The light guide plate are widely used in a lot of aspects for instance medical display,advertising,construction,liquid crystal display,lighting,transportation and so on because of its unique side light guide function.It have a good development prospect.Light curing micro-imprint technology has many advantages such as fast curing rate,energy saving and environmental protection.The light-curing material has the advantages of low temperature,high film-forming efficiency,and low volatile organic compound(VOC)content in the curing process,which is a new material that is pollution-free,pollution-free and high-efficiency.It is widely favored by research scholars.Using Light curing molding method replaces the traditional ink printing method,injection molding method,micro-cutting processing,hot embossing and other molding methods.Light-curing micro-imprint technology is a process of converting liquid photosensitive resin into solid micro-compression products under ultraviolet light radiation,and has been widely used in the field of micro-nano manufacturing.The main content of this article is to design the surface microstructure of the light guide plate for the Tracepro optical simulation software.The surface microstructure of the light guide plate is prepared by light curing molding technology.The influence of the composition of the light-curing material on the shrinkage rate and mechanical properties of the product was explored.The thesis optimizes the composition of the light-curing experimental materials.Finally,innovatively prepares a multi-faceted microstructure light guide plate and conducts experimental verification.The specific research content and research results obtained are as follows:1.The light source and light guide plate models were created with Tracepro optical simulation software,and simulation analysis was carried out.Use the controlled variable method to change the type,size and arrangement of the microstructures,study their influence on the uniformity of surface illumination and light extraction efficiency.Then optimize the shape of the microstructures.And add its microstructures to the bottom surface of the light guide plate,light entrance side and light exit surface in turn.And explore its influence on the optical performance of the surface.Through a large number of simulation analysis and research of Tracepro optical simulation software,the arrangement and size of microstructures that meet the requirements of optical performance are designed.Research indicates:adding a microstructure on the bottom surface can realize the light guiding function;adding this microstructure on the light entrance side can increase the uniformity of the illuminance of the light exit surface from 54.3%to 80.8%,which is equivalent to the role of a diffuser film;adding a microstructure on the light exit surface,so that the uniformity of illuminance is basically unchanged,the light output efficiency of the surface is significantly improved,from 42.6%to 60%,which is equivalent to the brightening effect of the prism film.It lays a theoretical foundation for the preparation of the multi-faceted microstructure light guide plate.It provides a new way to realize the multifunctionality with the effect of difusion and prism film,and have a certain degree of innovation.2.A photosensitive resin formulation with low yield and good mechanical properties for light-curing preparation of light guide plates was optimized.Through a self-made shrinkage test device(UV-PVT tester)in the laboratory,the influence of the types and contents of photoinitiators,oligomers and monomers in photocurable materials on the shrinkage of materials was studied.Developed a light-curable material formula with lower shrinkage.At the same time,the influence of different photosensitive resin material formulations on the mechanical properties(tensile strength,hardness)of the product and the influence on the hue of the product were explored,and the yellowing problem was basically solved.By studying the effect of the type and content of active monomers in the photocurable material on the product performance,the formulation of the photocurable material was optimized,and finally a low shrinkage rate,higher mechanical properties,and lower yellowing were developed.An experimental material formula for light-curing micro-imprint molding that is basically suitable for light guide plate applications.3.Based on the AS813 illuminance meter to test the optical performance of the front of the light guide plate.Due to the size is small,the nine-point test method was used to conduct multiple experiments and record the results.Compare the experimental results with the simulation results to verify.The experimental results show that the actual test results are are similar to the theoretical simulation results,and the results are basically the same.The uniformity of illuminance reaches over 80%,which meets the lighting standards of the International Committee.It is feasible to prepare multi-faceted microstructure light guide plates by light-curing micro-imprint.Therefore,this subject has certain research significance and practical application value.