标题: | 高亮度LED光电热特性量测与分析 Optical、Electrical、Thermal characteristic Measurement and analysis of High Power LED |
作者: | 徐锦渊 Hsu, Chin-Yuan 郭浩中 Kuo, Hao-Chung 平面显示技术硕士学位学程 |
关键字: | LED;热阻;接面温度;LED;Thermal Resistance;Junction temperature |
公开日期: | 2010 |
摘要: | 本論文主要研究主题为使用积分球、分光光谱仪、电源供应器、热电致冷温控器、以及DAQ卡,使用Labview软体整合上述仪器,透过校正手法,了解波长校正、分光通量绝对值校正,并从架设完成的仪器中,测量相同的高亮度LED,不同散热基板的热阻。 本研究会先从基本辐射度量学探讨,进而与光度量学做比较,接着再从色度学的观念,解释出常用的单位定义以及说明积分球量测原理及注意事项、光谱仪原理,以及波长校正,绝对强度值校正,然后介绍目前三种常看到的热阻量测方法,比较每个方法的优缺点,并说明为何使用NIST的热阻量测方法,根据上述的原理,使用Labview软体开发出可同时测试LED的光电热特性。 最后使用厂商所赞助相同规格的高功率白光LED测试,比较这几颗LED的特性,以及在不同接面温度下、不同注入电流下的热阻值的变化。 In this study, we integrated the integrated sphere, optical emission spectrometer, power supply, thermoelectric cooling (TEC) module, and DAQ card into one system by Labview software. Through the varying approaches, we accomplished the calibration of wavelength, luminous flux, junction temperature, and thermal resistance of LEDs. Besides, we measured and analyzed the thermal resistance of LEDs with different heat slug. This thesis begins with the discussion of basic radiometry, and following by comparison with photometry. Then we defined several useful units from the aspect of colorimetric. We specified the working principle of integrated sphere, optical emission spectrometer and the calibration of emission wavelength, absolute intensity. Next, we introduced three common methods of measuring thermal resistance and contrast them, and we explained why we chose the NIST method. According to the mentioned methods, we developed a system by Labview software which can measure the optical, electrical and thermal characteristics of LEDs at the same time. Finally, we analyzed the thermal characteristics of high power white LEDs under different junction temperature and injection current. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT079687518 http://hdl.handle.net/11536/44100 |
显示于类别: | Thesis |
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