Screen Light Environmental Impact Assessment And Quantification Under The Context Of Healthy Buildings

A comfortable and pleasant light environment is essential for healthy buildings.A large number of studies have explored the effects of light on human physiology and psychology,and confirmed that an inappropriate light environment can affect the body’s melatonin secretion,affect human rhythm,and even cause a series of physical and psychological diseases.At the same time,people also set up a series of standard systems to judge whether the building light environment meets the health requirements.The screen device plays the dual role of information source and light source,affecting the spatial light environment in which it is located.As a new element in the architectural space,the screen is widely used in various architectural space scenarios,and in the process of continuous development of modern technology,it may further evolve into a new interface of the building and reconstruct the architectural space form.And modern people frequently use screen devices,which further magnifies the impact of the light environment in the micro space around the screen on the health of users.However,because the screen light changes according to the content,it has the characteristics of instability and inability to unify.The impact of screen light on health is chronic and difficult to perceive,making it difficult to be quantitatively evaluated.This paper analyzes from the perspective of architectural optics technology,through theoretical formula derivation and specific experimental evaluation,proposes a method that can quantitatively evaluate the light health properties of the screen in real time.This method takes the Luminous Efficiency of Radiation(LER)and Melanopic Efficiency of Radiation(MzER)as the quantitative indicators for evaluation,and those indicators can be directly calculated from the chromaticity attribute of the content displayed on the screen.At the same time,this method can achieve the ideal calculation speed.This paper also establishes a series of intermediate methods,such as the Gamma correction method used to reconstruct the actual spectral energy distribution of the pixels,and the method of calculating the index by definition or by specific equipment parameters obtained in advance.Finally,based on the theoretical results,a preliminary calculation program was established to analyze the static and dynamic content,and the data results were drawn into a pseudo color map.It only takes about 1 second to complete the entire process from content input to pseudo color map output.After presenting the core theoretical research results,we analyzed the light environment requirements under different architectural scene conditions and extracted modern office scenes with the most extensive screen use requirements as examples,and initially discussed the screen light health optimization methods based on the evaluation results.At the same time,the paper also proposes other methods for optimizing the health of the light environment from the aspects of device use control,adjusting the brightness and color of the screen according to the time axis,and maintaining brightness in contrast.Finally,the content of the paper is summarized and prospected.Quantifying the influence of each element in the space on the light environment is a prerequisite for creating a healthy light environment.The evaluation and quantification of the influence of the screen light environment is an important part of it.Optimize the space light environment based on the quantitative evaluation results,which has the characteristics of more detailed,clearer and more specific.In the trend that screens are integrated into and reconstructed building spaces in more forms,guidance and suggestions are provided to broaden ideas for creating a healthy light environment in building spaces with screen elements.