电流对LED特性参数的影响  

The Influence on Characteristics Parameters for White-LED with Current

作　　者：方晶璐 牛萍娟[1,2,3] 田会娟[1,2,3] 

机构地区：[1]天津工业大学电子与信息工程学院,天津300387 [2]天津工业大学电工电能新技术重点实验室,天津300387 [3]大功率半导体照明应用系统教育部工程研究中心,天津300387

出　　处：《电工技术学报》2013年第S2期234-238,共5页Transactions of China Electrotechnical Society

基　　金：河北省科学技术研究与发展计划重点资助项目(12215106D)

摘　　要：LED(Light Emitting diode)是一种电致发光器件,电流对LED(Light Emitting Diods,发光二极管)LED发光的特性的影响日益成为人们关注的问题之一。本文主要是研究了LED在连续直流电流和PWM脉冲电流两种供电模式下,电流对白光LED特性参数(光通量、光谱、主波长、峰波长、相关色温和色坐标)等的影响。结果表明,电流对以光通量和主波长有较大的影响,会对引起相关色温和色坐标小范围的变化,而对光谱和峰波长几乎没有影响。同时还验证了,在PWM脉冲电流供电时,以上特性参数的变化趋势与直流供电的条件下的变化趋势相仿,但是又优于直流供电。这项实验可以初步指导LED供电方式的选择,从而更好推动LED在室内照明的应用。Light-emitting diodes(LEDs) are a kind of Electroluminescent Devices,characteristics parameters have a close relationship with the current.This paper mainly talks about in the two kinds of current power supply,continuous current supply and PWM pulse current supply,the effects of current on characteristics parameters of white LEDs,such as luminous flux,spectra,domain wavelength,peak wavelength,correlation color temperature and color coordinate.Through experimental test and data analysis,some conclusions was obtained that for continuous current supply,the injection current has the greatest impact on LED the luminous flux and correlation color temperature,almost linear relationship,and has a little effects on spectra,domain wavelength,color coordinate and peak wavelength.For PWM pulsed current supply,the change trend of all characteristic parameters are similar to continuous current supply,but better and more stable than continuous current supply.The results can guide the choice of current power supply mode to use and help towards the application of LED in domestic light.

关 键 词：发光二极管 特性参数 连续直流供电 PWM脉冲电流供电 

分 类 号：TN312.8[电子电信—物理电子学]