LED光源相关色温对显色性主观评价的影响

Influence of correlated color temperature of LED light source on subjective evaluation of color rendering

研究了光源相关色温对物体显色性的影响。通过视觉心理物理学实验,得到观察者在不同相关色温的LED光源和D65光源照明条件下5种蔬菜的自然程度的评价,并结合传统显色指数,对相关色温,显色指数及青椒、黄瓜、西红柿、茄子、胡萝卜5种蔬菜的自然程度进行相关性分析。研究发现,LED光源相关色温对各蔬菜的自然程度呈显著正相关,而传统显色指数与各色温及蔬菜自然程度均相关性不显著。在实验所用的4个相关色温水平中,5 950K相关色温水平下青椒的自然程度最高。在LED光源显色指数均不高的情况下,较高的色温对光源显色性存在有利影响。

The effects of the correlated color temperature of the light source on the color rendering of the object were studied.Through visual psychological physics experiments,the natural degree of five vegetables under different correlated color temperature LED light sources and D65 light source lighting conditions were evaluated by the observers.Combined with the traditional color rendering index(CRI),correlated color temperature,color rendering index and five vegetables including green peppers,cucumbers,tomatoes,eggplants,and carrots were analyzed for their naturalness.It was found that the correlated color temperature of LED light sources was significantly positively correlated with the natural degree of each vegetable,while the traditional color rendering index was not significantly correlated with the color temperature and the natural degree of vegetables.Among the four correlated color temperature levels used in the experiment,green peppers have the highest natural levels at 5 950 K correlated color temperature levels.It was also found that a higher color temperature has a favorable effect on the color rendering of light source when the CRI of LED light source is not too high.