三基色白光LED的司辰节律因子研究 |
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引用本文: | 郑莉莉,郭自泉,严威,吴挺竹,吕毅军,高玉琳,史园,陈忠.三基色白光LED的司辰节律因子研究[J].发光学报,2016(11):1384-1389. |
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作者姓名: | 郑莉莉 郭自泉 严威 吴挺竹 吕毅军 高玉琳 史园 陈忠 |
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作者单位: | 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. 厦门市产品质量监督检验院 国家半导体发光器件 LED 应用产品质量监督检验中心,福建 厦门,361004 |
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基金项目: | 科技部国际合作项目(2015DFG62190),国家自然科学基金(61504112),福建省产学合作重大专项(2013H6024),福建省自然科学基金(2016R0091),科技部港澳台科技合作专项(2015DFT10120) |
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摘 要: | 采用司辰节律因子模型,通过计算三基色白光LED光源在不同工作电流下的司辰节律因子,对可调色温的三基色白光LED光源进行非视觉效应研究。为了获取与自然光非视觉效应类似的LED白光,建立了司辰节律因子和相关色温分别相对于工作电流的关系模型,从而已知自然光的司辰节律因子和相关色温,就可以确定三基色LED的工作电流。通过测试一天内不同时刻的自然光光谱,根据上述模型推算出了三基色LED的工作电流。在所推算的三基色电流下,测试了白光LED光谱参数并计算了相应的司辰节律因子。与自然光司辰节律因子的对比结果表明,理论值和实验值的误差在1.1%以内,证实该方法具有可行性。本文所呈现的方法对于利用三基色白光LED模拟自然光具有一定的指导意义。
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关 键 词: | 非视觉效应 三基色白光LED 司辰节律因子 自然光 |
Investigation on The Circadian Action Factor of RGB White LEDs |
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Abstract: | The circadian action factor ( CAF) model was adopted to study the non-visual biological effects for the three-primary color-tunable white LEDs by calculating CAFs at various driving cur-rents. In order to obtain the white light similar to the natural light according to non-visual biological effects, the models of CAF versus current and CCT versus current were generated. Therefore, the driving currents of three-primary LEDs could be determined after the CAF and the CCT of the natural light were known. Based on aforementioned models, and after the natural light at different times in a day was tested, the driving currents of three-primary LEDs were deduced. Then, driven by these currents, white LEDs were tested and their CAFs were calculated. A comparison between calculated values and experimental counterparts shows that the difference lies within 1 . 1%, suggesting the fea-sibility of this approach. This work appears meaningful for mimicking the natural light by using three-primary white LEDs. |
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Keywords: | non-visual effects RGB LEDs circadian rhythms factor natural light |
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