Studies On The Color Deviation Threshold Of Chinese Classical Architecture Colored Drawing Under The Light Of LED With Different Power

Colored drawing is an important decoration color of Chinese classical architecture,which often regarded as the focus in lighting design of C hinese classical architecture,in order to highlight its historical status,designers always improve the surface brightness;however,the increase of brightness will make the object color offset and even cause the color distortion completely,which is not good for the performance of colored drawing authenticity.Therefore,founding the impact of power of light source on colored drawing authenticity is an urgent task for us.Based on the engineering practice,this paper aims to obtain the experimental data of the impact of LED general power on the color distortion and the guidance of having the function of operation and design in engineering application.First of all,this paper summarizes the theoretical knowledge of Chinese classical architecture colored drawing and its landscape lighting design.Meanwhile,it analyzes the special design requirements of colored drawing lighting : authenticity and light protection.And according to the requirements of colored drawing lighting design,comparing the applicability of general light source in colored drawing lighting,conclude that the most suitable lights for colored drawing lighting are LED and fluorescent lamp.Secondly,this paper introduces the colored drawing landscape lighting of representative of Chinese classical architecture in Beijing and Shaanxi.By the methods of field investigation and questionnaire survey,discovers the main objective factors affecting the colored drawing lighting: light power and light color temperature.Thirdly,using the objective test and subjective evaluation experiment to reproduce the landscape lighting scene in laboratory environment,measures the color offset degree of each colored drawing in common power irradiation(The power values of light source respectively are 4W,9W,13 W,20W).And by the method of interpolation,calculates the color difference threshold.Finally,according to color difference values of color samples,which are less than difference threshold under the irradiation of LED,selects the LED parameters which meets the requirements of the authenticity in colored drawing lighting.This paper realizes the quantitative research on the performance of colored drawing authenticity under the irradiation of different LED,and provides a reliable basis for the LED selection of colored drawing lighting design.