On Simulation and Experimental Verification of LED Angular and Planar Illumination Distribution

• Main Authors: Pi-Hsuan Lin, 林丕軒
• Other Authors: 林穀欽
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/95041018579945489244

碩士 === 崑山科技大學 === 機械工程研究所 === 98 === LED technology is under vigorous development in the recent years, and used extensively in applications for indoor/outdoor lighting, building illumination, medical lighting and other applications. Optical simulation and experimental verification is usually required in each of the above applications. Thus, the optical characteristics of individual LEDs such as the angular and spatial illumination intensity are important parameters for measure. The information must be built with the simulation software for analysis. This study focuses on measurement the angular distribution of candela and planar distribution of lux for a single LED with experimental verification. For this, an automatic system is built in a lab to measure the distribution of intensity. In the system, a light meter is installed on a xy table while the light source for measurement is installed on a disk of angular regulator. For angular measurement, the disk is regulated to get the angular distribution of intensity of the source. For planar measurement, the light meter is moved in a planar motion to get the illumination distribution of the source. SolidWorks and TacePro are used for LED 3D modeling and illumination analysis. The automatic system contains mechatronics and optical devices, and it is integrated under the LabVIEW programming environment. Examples of measurement of angular and planar illumination distribution of two LEDs by simulation and experiment are included in this article. The results of the simulation and experiment agree with each other qualitatively and quantitatively well. This proves the adequacy of the proposed approach for measuring the optical characteristics of LEDs. By this, a library of various LEDs can be built for simulation and design studies for multi-LEDs display in practical applications.