LED光源的结温测量方法  

Measurement of Junction Temperature in White LED

作　　者：郭威[1] 陈继兵[1] 安兵[1] 

机构地区：[1]华中科技大学连接与电子封装中心,湖北武汉430074

出　　处：《电子工艺技术》2012年第6期320-322,340,共4页Electronics Process Technology

基　　金：国家自然科学基金项目(项目编号:60976060)

摘　　要：分别采用红外热像仪、管脚温度法和Ansys模拟计算法分析测量了LED筒灯的结温。结果表明:管脚测量法能够通过测量管脚的温度,准确地推测出LED芯片的结温。由于这种方法具有非破坏性、精确性、简易性和非接触性,因此可广泛应用于LED结温的测量。测量误差主要取决于封装热阻的误差,而封装热阻是LED灯珠的固有属性,不随着外界温度和散热能力的改变而改变,因此管脚测量法具有通用性。Measure the Junction temperature of LED downlight by infrared thermal imager,Pin temperature method and ANSYS simulation.The results show： Pin temperature method can accurately predict the chip Junction temperature by the pin temperature.Because of its non-destructive,accuracy,simplicity,non-contact,Pin temperature method can be widely used in the LED junction temperature measurement;Measurement tolerances mainly depends on the package thermal resistance tolerances;The package thermal resistance is the inherent attribute of the LED,without the influence of outside temperature and heat capacity,so Pin measuring method has the versatility.

关 键 词：LED筒灯 结温 热阻 红外热像 

分 类 号：TN36[电子电信—物理电子学]