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1. 厦门大学电子科学系 福建省半导体照明工程技术研究中心,福建 厦门,361005
2. 漳州职业技术学院 电子工程系, 福建 漳州 363000
纸质出版日期:2012-8-10,
收稿日期:2012-5-16,
修回日期:2012-6-3,
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戴树春, 郭自泉, 吕毅军, 陈忠. 中性色温下两基色、三基色荧光粉转换白光LED的光谱优化[J]. 发光学报, 2012,33(8): 873-878
DAI Shu-chun, GUO Zi-quan, LV Yi-jun, CHEN Zhong. Spectrum Optimization of Bi-color and Tri-color Phosphor-converted White LEDs in Neutral Correlated Color Temperature System[J]. Chinese Journal of Luminescence, 2012,33(8): 873-878
戴树春, 郭自泉, 吕毅军, 陈忠. 中性色温下两基色、三基色荧光粉转换白光LED的光谱优化[J]. 发光学报, 2012,33(8): 873-878 DOI: 10.3788/fgxb20123308.0873.
DAI Shu-chun, GUO Zi-quan, LV Yi-jun, CHEN Zhong. Spectrum Optimization of Bi-color and Tri-color Phosphor-converted White LEDs in Neutral Correlated Color Temperature System[J]. Chinese Journal of Luminescence, 2012,33(8): 873-878 DOI: 10.3788/fgxb20123308.0873.
针对中性色温4 870 K
考虑斯托克斯损失
研究了两基色、三基色的白光LED的光谱优化。结果表明:InGaN/GaN基蓝光LED激发YAG荧光粉合成的白光光视效能可高达483.5 lm/W
但显色性较差
计算的斯托克斯效率为83.9%。加入窄带红色荧光粉或红光LED
优化后的光视效能降低为343 lm/W
但显色指数升至94.7
同时计算得到该LED的斯托克斯效率为84.4%。对该优化的三基色LED光谱进行可调色温白光的特性分析
发现较高色温 (>4 000 K)对应的显色指数普遍高于低色温(<4 000 K)的显色指数。
The spectra of the bi-color and tri-color phosphor-converted white LED were optimized in the neutral correlated color temperature of 4 870 K with consideration of Stokes shift energy loss. The results showed that a high luminous efficacy of radiation up to 483 lm/W could be attained in the case of the white LED composed of blue chip and YAG phosphor but with a poor color quality and 83.9% Stokes efficiency. When a narrow-band red phosphor or LED chip was added to the bi-color white LED
a good color rendering index of 94.7 was gained with a reduced luminous efficacy of radiation 343 lm/W and a Stokes efficiency of 84.4%. Later
we characterized the performance of tunable-color-temperature tri-color white LED. It was found that the color rendering index was better when the correlated color temperature exceeded 4 000 K.
光谱学光谱优化相关色温显色指数光视效能
spectroscopyspectrum optimizationcorrelated color temperaturecolor rendering indexluminous efficacy of radiation
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