激光与光电子学进展, 2019, 56 (8): 082301, 网络出版: 2019-07-26
电流和温度应力对LED球泡灯可靠性的影响 
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Effects of Current and Temperature Stress on Reliability of LED Bulbs
图 & 表
图 1. LED球泡灯的发射光谱及其LED光源模组
Fig. 1. Emission spectrum of LED bulbs and photograph of LED light source module
图 2. 室温下不同电流驱动LED球泡灯光通量维持率
Fig. 2. Luminous flux maintenance of LED bulbs under different currents at room temperature
图 3. 室温下LED球泡灯在不同电流下的性能随老化时间的变化。(a)色坐标;(b)色温;(c)显示指数;(d)荧光粉黄光与芯片蓝光发射强度的比值
Fig. 3. Performances of LED bulbs versus aging time under different currents at room temperature. (a) Chromaticity coordinates; (b) color temperature; (c) color rendering index; (d) emission intensity ratio between yellow phosphor and blue chip
图 4. 室温下LED球泡灯的光源模组在不同电流下的老化效果。(a)外观图;(b)红外热分布图;(c)驱动电源底座外观图
Fig. 4. Aging effects of light source module of LED bulbs under different currents at room temperature. (a) Appearance; (b) infrared thermal imaging; (c) substrate of driving power
图 5. 室温下不同电流老化后的芯片I-V特性
Fig. 5. I-V characteristics of chips aged under different currents at room temperature
图 6. 55 ℃温度下LED球泡灯在不同电流下的特性。(a)光通量维持率;(b)色坐标;(c)色温;(d)显示指数
Fig. 6. Characteristics of LED bulbs under different currents at 55 ℃. (a) Luminous flux maintenance; (b) chromaticity coordinates; (c) color temperature; (d) color rendering index
图 7. 温度-电流应力对LED球泡灯特性的影响。(a)荧光粉黄光与芯片蓝光发射强度比;(b)芯片I-V曲线图与驱动电源底座外观图
Fig. 7. Effect of joint temperature-current stress on characteristic of LED bulbs. (a) Emission intensity ratio between yellow phosphor and blue chip; (b) I-V curves of chips and substrate of driving power
图 8. 55 ℃温度-电流应力对LED球泡灯特性的影响。(a)光源模组的老化图和光谱变化图;(b)光源模组的红外热分布图
Fig. 8. Effect of joint temperature-current stress on characteristics of LED bulbs at 55 ℃ temperature. (a) Aging photographs of light source modules and spectral changes; (b) infrared thermal distributions of light source modules
表 1不同电流应力下的老化寿命
Table1. Aging lifetimes under different current stresses
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表 2LED灯具拟合幂指数n和预测正常工作的寿命
Table2. Fitted power exponent n and predicted normal working lifetime of LED device
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蓝栩砚, 杨欣, 宿世臣, 章勇. 电流和温度应力对LED球泡灯可靠性的影响[J]. 激光与光电子学进展, 2019, 56(8): 082301. Xuyan Lan, Xin Yang, Shichen Su, Yong Zhang. Effects of Current and Temperature Stress on Reliability of LED Bulbs[J]. Laser & Optoelectronics Progress, 2019, 56(8): 082301.
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