显色指数CQS和CRI对光源显色性评价的差异分析  

Comparison of CQS and CRI for Color Rendering Evaluation of Light Source

作　　者：赖传杜 庄其仁[1] 张晓婷[1] 陈芳萍[1] LAI Chuandu ZHUANG Qiren ZHANG Xiaoting CHEN Fangping(College of lnformation Science and Engineering, HuaQiao University, Xiamen 361021, China)

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361021

出　　处：《照明工程学报》2017年第2期46-51,共6页China Illuminating Engineering Journal

基　　金：福建省科技计划重点项目(2012H0029);泉州市科技计划项目(2014Z105);福建省光传输与变换重点实验室开放课题(20150102)

摘　　要：由于现行显色指数CRI(Color Rendering Index)在评价白光LED光源时出现越来越多的问题,而较为权威的新指标CQS(Color Quality Scale)并未得到广泛的认可,本文采用大量典型光源实例,论证CQS与CRI的一致性和差异性。本文收集市面上常见的10种荧光灯、7种RGB LED和25种Phosphor white LED灯,分别计算了两种显色性评价指数CRI R_a和CQS Q_a,并分别对不同类型的光源进行相关性分析、色差分析及差值分析。结果发现:①对荧光灯的显色性评价,CQS与CRI基本一致,但对色温极低以及对高饱和度色块显色差的灯有做一些修正;②对Phosphor white LED灯的显色性评价,CQS与CRI基本一致,但对RGB LED的显色性评价,CQS做了修正,与CRI相差较大;③通过差值分析法,可以看到CQS Q_a和CRI R_a差值比例的整体趋势随着CRI R_a增大而减小,当CRI R_a达到90的时候,两者的差值比例接近为0。Color Rendering Index（ CRI） recommended by CIE and Color Quality Scale（ CQS） developed by National Institute of Standards and Technology（ NIST） are two prime evaluations for color rendering property of light source. Both them are suitable for evaluation of traditional lighting sources,but have not received general acceptance for evaluation of white LED. the applicability of the evaluation standards requires extensive experiments for validation. In the paper,10 kinds of fluorescent and 32 kinds of LED lamps which are common in the market were measured. And the CRI（ Ra） and CQS（ Qa） values of these light sources were calculated.The relationshipbetween the two indexes was analyzed through correlation analysis,color discrimination analysis and difference ratio analysis,respectively. The results show that there is significant difference between the two indexes when evaluating RGB LED. However,when evaluating fluorescent lamps and Phosphor white LED small difference was shown between Raand Qa. And the difference ratio between them is close to 0% when light sources have CRI Ravalue above 90.

关 键 词：显色性 显色指数(CRI) RGB LED CQS 

分 类 号：TM923.34[电气工程—电力电子与电力传动]