三芯片LED 光谱效率性能优化研究

三芯片发光二极管(LED)光谱选择性多,整体性能可控性好.通过合成特定色温的多种三芯片LED 光源,并研究辐射发光效率(LER),中间视觉效率(MER),生理辐射效率(CER)等性能的变化范围,为光谱优化提供理论基础.从6 组在色度图上分布相对均匀的单芯片LED 光源光谱中,选择其中3 组进行组合,合成2000 K,3000 K,4000 K,5000 K以及6000 K 五种色温光源,计算相应的ηLER 、S/P 值和acv值并进行函数拟合,得到相关性能的范围.结果表明,各色温下相应的ηLER 、S/P 值和acv值变化范围较大,分别相差达到0.4、0.6 以及0.4 以上.整体趋势与传统研究结果一致,色温越高,S/P 值和acv值相应越大,但是低色温光源也可达到较高的S/P 值和acv值,高色温光源也可达到较低的S/P 值和acv值.三芯片LED 光谱优化能够有效的提升整体性能.

Abstract

Three-chips of light emitting diodes (LEDs) are flexible in spectrum composition,and the whole performance is easy to control.Through studying the range of luminous efficacy of radiation (LER),mesopic efficacy of radiation (MER) and circadian efficacy of radiation (CER) based on various combinations of threechips of LEDs,basic theories for spectrum optimization are provided.Three chips from six groups of single chip LED are chosen,which uniformly distributed on the chromatic diagram to fabricate three- chips of LED at different color temperatures of 2000 K,3000 K,4000 K,5000 K and 6000 K.ηLER,S/P ratio and acv value are calculated,and ranges of corresponding characters are achieved.Results show that ranges of corresponding ηLER ,S/P ratio and acv value are large,respectively reach 0.4,0.6 and over 0.4.Overall trends conform to former studies,high color temperature leads to high S/P ratio and acv value.But low color temperature LEDs may also reach moderately high S/P ratio and acv value,and high color temperature LEDs may also reach moderately low S/P ratio and acv value.Spectrum optimization of three-chips of LEDs effectively helps improving performance.

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姚其. 三芯片LED 光谱效率性能优化研究[J]. 激光与光电子学进展, 2015, 52(8): 083003. Yao Qi. Spectral Efficiency Performance Optimization Research on Three-Chips of LED[J]. Laser & Optoelectronics Progress, 2015, 52(8): 083003.

三芯片LED 光谱效率性能优化研究

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