| Title |
Study of Optimal Light Scattering Pattern Design for Flat Lighting Device using Glass Light Guide |
| Authors |
한정민(Han, Jeong-Min) ; 김원배(Kim, Won-Bae) |
| DOI |
https://doi.org/10.5370/KIEEP.2017.66.4.242 |
| Keywords |
Flat lighting device ; Optical simulation ; Ray tracing method ; Light scattering pattern ; Glass light guide |
| Abstract |
In this study, it was investigated about optical simulation in high brightness and high uniformity general lighting using glass light guide plate. And we adopt edge-light emission type light plate. Edge-light type lighting has been used LCD application, especially note PC or smart phone backlight unit. Because it had the good properties such as slim shape and light weight. We thought this type was suitable for general lighting application such as wall attached type or ceiling mount type. But many of edge-light type lighting had problems. It called slanted output light rays. That was main key parameter how could control the direction of output light rays. We investigated the solution of this problems, using ray tracing method, we recognized the major fact of the solution relied on the geometric structure of diffusing dot shape. We set the conditions of aspect ratio in diffusing dot shape such as 0.5 to 1. And, at first, we designed diffusing dots shape based on the results of optical simulation and made specimen. as above condition, and acquired good result in confirming dots shape such as the value of the output rays's peak angle was around 75 degrees. And good light distribution characteristics were measured by slated spectro-radiometer. It was shown that the effective ways of designing light distribution characteristics using optical simulation such as ray tracing linear method for making general lighting using glass light guide plate. |