Simulation Study On Typical Colour Light Trespass Around Residential Buildings Caused By LED Advertising Screens

In recent years,LED advertising screens had been widely used in cities around China.However,LED screens have induced serious colour light trespass problem to residential area around,they had a serious impact on the normal life of the residents.There are few studies on colour light trespass around residential buildings,and control policies for light trespass can not be fully applicable in our country.Therefore,it is necessary to study on colour light trespass around residential buildings caused by LED advertising screens.In order to make clear influence degree,influence factors and control measures of the light trespass,studied 21 cases of LED advertising screens and residential buildings affected in Beijing-Tianjin region.The main research approaches used in the study are literature review act,field test,questionnaire,comparison of subjective and objective results,software simulation and statistical analysis.This paper has make a full research on typical colour light trespass around residential buildings caused by LED advertising screens,the main research work and production are as follows:1、The basic research database is formed through investigation,testing and related information collection,contents of the database are LED advertising screen parameters(Area,installation location,opening and closing time),test data(luminance and color coordinates),spatial information of intrusive environment(the relative position between LED advertising screen and the residential building)and image data.accumulated rich base data for further research;2、Based on the subjective investigation,the paper have got the subjective feelings of residents who affected by LED screens.According to subjective and objective comparative analysis,summarize the range of wavelength and their corresponding luminance ranges for chromatic lights.3、Through analysis of control variable simulation,obtained functional relationship among window illumination and the LED advertising screen brightness parameters,area parameters,LED advertising screen and residential building horizontal straight line distance parameters,horizontal angle parameters,the vertical angle parameters.4、Through the quantitative analysis of multi-factor simulation of light trespass caused by LED advertising screen to residential area around,this paper have got the window illumination calculation formula,after analysis,and according to the relevant parameters analysis,we summed up the influence degree of factors on the window illumination.5、In order to improve the living environment and reduce the level of light trespass caused by LED advertising screen,this paper comprehensive related research,propose LED advertising screen set up recommendations and improvement measures.