大功率LED温度特性测量仪  

Instrument for measuring temperature characteristic of high power LED

作　　者：陈国杰[1] 周有平[1] 张潞英[1] 李斌[1] 钟土基[1] 

机构地区：[1]佛山科学技术学院理学院,广东佛山528000

出　　处：《大学物理》2012年第2期33-36,共4页College Physics

基　　金："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

摘　　要：用半导体加热/致冷芯片对LED恒温,用贴片式pt100作温度传感器,用具有人眼视觉特性的可见光亮度传感器组成光强探测器,研制了一种大功率LED温度特性测量仪.用该测量仪测量了1 W白光LED在恒流和恒压驱动下光强、发光效率等参数的温度特性.实验表明,该测量仪恒温快,测量准确,成本低,操作便捷.An instrument for measuring the temperature characteristic of a high power LED is developed by using a semiconductor heating/cooling element to make the LED＇s temperature rise or fall, in which a pt100 surface mounted resistor is used as a temperature sensor, and a light sensor with spectral response that emulates the human eye is used as a luminous intensity detector. The temperature characteristics of the photoelectric parameters, such as luminous intensity, luminous efficiency, of the 1 watt white LED supplied by a constant current source or a constant voltage source are investigated, respectively. The experimental results show that this instrument has advantages of fast temperature measurement, high accuracy, low cost and simple operation.

关 键 词：大功率LED 光强 温度特性 测量仪 

分 类 号：O443.5[理学—电磁学] TN312.8[理学—物理]