Evaluation Of Urban Outdoor LED Display Brightness And Setting

LED display of this new technology, as advertising, labeling, information releaseof its obvious advantages, in recent years, the development and promotion of newtechnologies very quickly, but at the same time showing its advantages, it also bringssuch as light pollution negative impact. How to make this new technology can exceedand meet the needs of all sectors of society, it is not only the joint responsibility andobligation of the individual, groups, government and society, but also the purpose ofthis subject research. Therefore, urban outdoor LED display brightness and settingproblem is a subject worthy to research. Deal with urban outdoor LED displaybrightness and settings is protection of the urban environment and maintain goodrelations to the city’s image. Handle this relationship can both to limit light pollutionand to the economic prosperity of the city in sustainable urban development andbeautification of the city’s image. The main ideal as a basis to support research is use ofvisual scientific theory, building optical theory, theory of urban planning and urbandesign. By means of Site investigations and Outdoor Measurement, QuantitativeResearches and Qualitative Researches were made. Find a scientific basis for urbanoutdoor LED display brightness and settings in theory, and can be applied in practicalwork.Evaluation of urban outdoor LED display consists of two general principles, theprinciple of a public value, and the other is in the form of aesthetic value principle,which is being presented for the first time.This paper investigates the outdoor LED display status quo, Chongqing, Chengdu,Shanghai, Nanjing, Shenzhen, Guangzhou, six cities, and has done a study to measurethe outdoor experiments. Research setting for outdoor LED display problems, outdoorexperimental research on outdoor LED display brightness problems. By collate andanalyze the data obtained, analysis, basically mastered the status of these cities set upoutdoor LED display, the problems. Laid the foundation for the evaluation of urbanoutdoor LED display brightness settings.The issue of the establishment of urban outdoor LED display brightness and settingevaluation system is comprehensive, multifactorial. Evaluation system established bythe two main evaluation index system-Brightness fitness, set fitness evaluation and asecondary visual imagery overall composition. The overall objective of the evaluation is to evaluate the visual quality.Evaluation method is based on an objective assessment based, supplemented bysubjective evaluation that objective, subjective evaluation method of combining.Objective evaluation method used is a modern comprehensive evaluation model, thebrightness of the LED display outdoor suitability and fitness set an objective judgment,the evaluation results of the use of subjective evaluation method to overcome thesubjectivity and one-sidedness, reflecting the scientific evaluation and normative.Subjective evaluation experts and evaluated using a combination of public, subjectiveevaluation of experts focused on visual imagery overall evaluation, the public’ssubjective assessment by questionnaire of eight questions, the objective evaluation ofthe evaluation results as a reference.This topic is also using AHP to construct a hierarchical model evaluation anddetermine the evaluation index weight value of the quantitative and qualitativeindicators.This paper proposed and established urban outdoor LED display brightness andsetting evaluation standards and evaluation criteria. In the standard system and nationalrating standards for outdoor electronic display no specific standard, under standardizedconditions, established by reference to the "urban landscape lighting designspecifications"(JCJ/T163-2008),"city advertising facility technical specifications"(CJJ149-2010), and research and outdoor experimental study refer to "CIE urbanLighting Guide136-2000","British cities lighting Guide" and the illuminatingEngineering Society of North America,"lighting Handbook"(ninth edition) standards,as well as Beijing, Guangzhou, Shenzhen and other specifications for the outdoorelectronic display, combined with, collate and analyze the data obtained by the analysisas a basis established. The evaluation criteria and evaluation criteria system has a strongpertinence, theoretical and practical significance to regulate outdoor LED displaybrightness settings. Especially in linear space and space into the nodes to determine thestandard of outdoor LED display set a single block area, more scientific and reasonable.By studying this subject, the main problem of city outdoor LED display is that thehigh brightness, brightness contrast is too large, and set perpendicular to the sides of theroad and road intersection area. So this research makes a city outdoor LED displaysetting guidelines.The topics from the theory and practical application to solve the city’s outdoorLED display brightness and setup issues. The evaluation indicators and criteria are scientific, practical, not only regulate the urban outdoor LED display brightness andsettings, providing practical evaluation of scientific and rational basis, but also providea reference for the city related to the management and control of work. This researchcan promote the new technologies development with healthy.