| 大功率白光LED恒压驱动与恒流驱动下温度特性的实时测量 |
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| 引用本文： | 陈国杰,余汉铭,李斌,周有平.大功率白光LED恒压驱动与恒流驱动下温度特性的实时测量[J].大学物理,2011,30(8):40-42. |
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| 作者姓名： | 陈国杰 余汉铭 李斌 周有平 |
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| 作者单位： | 佛山科技学院理学院,广东佛山,528000 |
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| 基金项目： | “大学物理实验”广东省精品课程; 广东省高等教育教学改革项目(BKYB2011085); 广东省物理实验教学示范中心资助 |
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| 摘 要： | 采用贴片pt100设计一种快响应温度计,在恒压和恒流驱动下分别实时测量大功率白光LED温度对光电参数的影响,测量误差小、效率高.实验表明,LED在恒压驱动时电流和光强随温度的升高而增大,而在恒流驱动时光强随温度的升高而减小;发光效率在恒流和恒压驱动时均随温度的升高而降低,但前者影响较小.
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| 关 键 词： | 白光LED 光强 温度特性 |
Real-time measurement of temperature characteristic for high power white LED supplied by constant current source or constant voltage source respectively |
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| CHEN Guo-jie,YU Han-ming,LI Bin,ZHOU You-ping.Real-time measurement of temperature characteristic for high power white LED supplied by constant current source or constant voltage source respectively[J].College Physics,2011,30(8):40-42. |
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| Authors: | CHEN Guo-jie YU Han-ming LI Bin ZHOU You-ping |
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| Institution: | CHEN Guo-jie,YU Han-ming,LI Bin,ZHOU You-ping(School of Science,Foshan University,Foshan,Guangdong 528000,China) |
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| Abstract: | A fast response thermometer is designed by using a pt100 surface mounted resistor.The effect of temperature on the photoelectric parameter of a high power LED supplied by a constant current source or a constant voltage source respectively is investigated real-timely by using the thermometer,which has less measurement error and higher measurement efficiency.The experimental results show that when the LED's temperature rises,the luminous intensity of the LED increases under the constant voltage source and dec... |
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| Keywords: | white LED luminous intensity temperature characteristics |
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