Optical Design and Simulation for the High Uniformity LED Strip Lamp

• Main Authors: Yu-Shiang Tsai, 蔡妤香
• Other Authors: Pin Han
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/y4bfvu

碩士 === 國立中興大學 === 精密工程學系所 === 99 === Energy saving lighting is a very important concept and trend today. The key issue is to find environment friendly and high efficiency light source. LED are one of the promising light source which have the characteristics of low power consumption, small volume and no mercury pollution, thus is can play an important role in the future green lighting market. However, there is a difficulty in using LED lighting due to its point-like emitting area. When they are lined up with certain gap, we will see the glare at LED area and a dark region in the gap between them. Therefore how to reduce the contrast between the light and dark region is an urgent problem. Motivated by this read, this work employees optical simulation software called SPEOS and optics principle to design a novel strip structure which can improve the uniformity. First the V-groove angle is optimized to provide the best angular distribution. Then two options are studied. The first is to use the diffuser film, which can increase the uniformity from 53 % to 90 %. The second is to wedge air gap with total internal reflection and it also enhance the uniformity from 48.7 % to 58.1 %.