摘要
LED灯的光通量不仅受电流的影响,还受到结温变化的影响。针对传统LED调光存在只改变电流大小而忽略结温变化对光通量影响所存在的不足,结合LED结温和管脚温度存在特定的关系,利用实验装置采集HL001WY型Ga N基白光LED在不同管脚温度和正向电流下的光通量实验数据并进行二次项趋势回归,利用定标和归一化方法建立光通量、电流以及管脚温度三者变化关系的数学模型。计算结果表明,利用该方法建立的模型得到的计算数值与实验实际测量值的相对误差小于4.5%。
LED light flux is affected not only by current, but also by the junction temperature change. The traditional LED dimming method typically only changes the current and ignores the junction temperature changes. In order to fix this downside, a mathematical model was established based on the relationship among the luminous flux, current and pin temperature that can show the junction temperature of LED. The luminous fluxes of HL001WY type GaN-based white LEDs were tested at different currents and pin temperatures, and the experimental data were quadratic term trend regression. By using calibration and normalization method, the mathematical model was estab-lished. The calculations show that the relative error between the calculated value and the actual measured value is less than 4 . 5%.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2015年第8期953-956,共4页
Chinese Journal of Luminescence
基金
国家青年科学基金(61405086)
福建省教育厅科研项目(JK2014027)资助
关键词
智能调光
模型分析
电光转换
热分析
smart dimming
model analysis
electro-optical conversion
thermal analysis
