驱动电流对LED光谱特性的影响
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摘要
搭建LED驱动电流控制及光谱测量系统,改变驱动电流,利用光学多道分析仪观测LED光谱峰值波长、峰值强度及谱线宽度等光谱特征,发现谱线峰值强度及谱线宽度随驱动电流呈非线性增长关系.随驱动电流的增加,蓝光LED色温没有明显变化,白光LED色温有明显升高,暖白光LED色温微弱降低.
Building a LED drive current control and spectral measurement system, the spectral characteristics of the peak wavelength,peak intensity and spectral line width of the LED spectrum were measured using an optical multi-spectral analyzer by change the LED drive current. Found that the peak intensity and the width of the line have a nonlinear growth relationship with the drive current. With the increase of the driving current, the color temperature of the blue LED has not changed significantly, the color temperature of the white LED has significantly increased, and the color temperature of the warm white LED has decreased slightly.
Building a LED drive current control and spectral measurement system, the spectral characteristics of the peak wavelength,peak intensity and spectral line width of the LED spectrum were measured using an optical multi-spectral analyzer by change the LED drive current. Found that the peak intensity and the width of the line have a nonlinear growth relationship with the drive current. With the increase of the driving current, the color temperature of the blue LED has not changed significantly, the color temperature of the white LED has significantly increased, and the color temperature of the warm white LED has decreased slightly.
引文
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[7]张雅男,王俊锋.利用发光层梯度掺杂改善顶发射白光有机发光二极管光谱的稳定性[J].物理学报,2015,64(9):097801-7.
[2]方晶璐,牛萍娟,田会娟.电流对LED特性参数的影响[J].电工技术学报,2013,28(2):234-238.
[3]梁方束.对单色仪定标实验中Hg光谱谱线补充标定的讨论[J].大学物理,2004,23(4):31-32.
[4]徐广强,于慧媛,张竞辉,等.基于单色LED补偿白光LED技术的模拟太阳光谱研究[J].发光学报,2017,38(3):1117-1124.
[5]恩德,任凤娟,乔文涛.不同电流条件下大功率发光二极管光谱参数分析[J].河南理工大学学报,2011,30(2):172-175.
[6]王兆枫,曹佳锐,李刚,等.大功率LED电学参数模型的研究[J].吉林大学学报,2018,36(1):108-112.
[7]张雅男,王俊锋.利用发光层梯度掺杂改善顶发射白光有机发光二极管光谱的稳定性[J].物理学报,2015,64(9):097801-7.