Research On Evaluation Method Of Color Rendering Of LED Light Source

The color rendering refers to that the object shows the color effect when the light on it,we can evaluate the color rendering through the objective and subjective.In the objective aspect,color rendering index,color gamut area index and other objective indicators is used to evaluate it.In the subjective aspect,we can evaluate from the light of nature,preference and other subjective subjective visual experience.However,to the color rendering of LED light source,there are so many objective indicators and they are highly relevant,and the objective evaluation index inconsistent with the subjective visual perception.Therefore,how to integrate the existing objective evaluation index and subjective,then construct the comprehensive evaluation system of color vision of LED light source which is consistent with the subjective and objective is an important problem in the field of lighting.In this study,intelligent adjustable LED light source as the research object,firstly,in order to solve the problem that there are so many objective indicators and they are highly relevant,for the existing 13 kinds of visual evaluation of the objective evaluation index,through the correlation coefficient method to achieve the correlation between the objective analysis,through the complex correlation coefficient method and the principal component analysis method to achieve the representative of the selection and testing.The analysis results show that using four indicators can effectively replace all the above indexes,and solve the problem above and then realize the purpose of using the least number of indicators to characterize the color of LED light.Secondly,in order to solve the problem of the objective evaluation index inconsistent with the subjective,by designing of psychophysics experiment,the subjective scores of light reduction,preference and color discrimination were obtained under different illumination conditions.Then we establish the relationship between the representative index and the subjective score by the multiple linear regression model,and subjective experiment was carried out to validate the results.In'the last,the paper obtains a set of comprehensive evaluation system which can make the subjective consistent with objective evaluation,and provide an effective method for the evaluation color rendering of LED light source.