레이저로 유도된 산란체패턴에 따른 도광판의 광학적 특성에 관한 연구

Abstract

The purpose of this paper is to suggest themethod of luminance improvement of inner-scatterer-based light guide panel(LGP) by using the density variation of inner pattern and additional surface patterning on LGP. For the prediction of inner-scatterer-based LGP performance, we suggested on efficient simulation method, which used simplified scatterer plate instead of numerous scatterers. The LGP having curved inner pattern provided better performance in the uniformity of luminance than that with linear inner pattern. The results confirmed that the distribution of luminance depends on the shape of designed inner-pattern. By increasing the density of inner pattern at the inner of the LGP and processing surface pattern at the bottom as a form of line, we achieved highly enhanced value in the average brightness. The conventional simulation model of LGP composed with individual scatterers requires heavy computing load and long calculation time because it has lots of scattering planes. We replaced this model with simplified plate, which has a thickness equal to scatterer's diameter and specific directionality in light scattering. Additionally, the ratio of reflection to transmission was that of applied to simplifed plate. The simulation results was similar to a conventional method in luminance and the run time was reduced from 1 hour to 2min. Also, the results of suggested simulation was well matched with that of experimental result. Herewith we could confirm the feasibility of suggested simulation method. By the appropriate adaptation of inner and surface pattern, the performance of LGP can be improved further. By doing the simulation of LGP with simple plate, which has specific directionality in scattering, the performance of inner-scatterer-based LGP can be predicted quickly.