Spectrum Optimization of Bi-color and Tri-color Phosphor-converted White LEDs in Neutral Correlated Color Temperature System

DAI Shu-chun; GUO Zi-quan; LV Yi-jun; CHEN Zhong

doi:10.3788/fgxb20123308.0873

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Spectrum Optimization of Bi-color and Tri-color Phosphor-converted White LEDs in Neutral Correlated Color Temperature System

更新时间：2020-08-12

- Spectrum Optimization of Bi-color and Tri-color Phosphor-converted White LEDs in Neutral Correlated Color Temperature System
- Chinese Journal of Luminescence Vol. 33, Issue 8, Pages: 873-878(2012)
- 作者机构：
  
  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
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20123308.0873
  CLC： O432
- Received：16 May 2012，
  
  Revised：03 June 2012，
  
  Published：10 August 2012
- 稿件说明：
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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.

摘要

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。

Abstract

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.

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references

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