Study On Optimization Of Lighting Environment Of Multimedia Classrooms In Primary And Secondary Schools Using Electronic White Board

This study was supported by the National Natural Science Foundation of China(Grant No.51708055)and the Basic Research and Frontier Exploration Project of Chongqing(Chongqing Natural Science Foundation)(Grant No.51708055).The Research on the Light Environment of Multimedia Classrooms for Human Visual Health(Grant No.CSTC2018JCYJAX0681),with the advancement of education informatization in China as the research background,mainly discusses the influence of lighting environment of electronic whiteboard multimedia classroom on students’ visual fatigue degree in primary and secondary schools.The "13th Five-Year Plan for Educational Informatization" issued by the Ministry of Education in 2016 pointed out that the penetration rate of multimedia classrooms has reached 80%,which indicates that the teaching environment of primary and secondary schools has undergone great changes.However,with the popularization of multimedia teaching,with the increase of students’ knowledge,the rate of myopia also increases year by year.Primary and secondary school students are at an important stage of eye development.The current curriculum for primary and secondary schools is 8-10 hours per day,and students will study for long hours in a multimedia classroom every day.Relevant medical studies have pointed out that the quality of light environment plays a decisive role in the development of eyes and the change of refractive state.Learning in a bad lighting environment will cause visual fatigue of students,and the long-term accumulation of visual fatigue will easily lead to poor visual symptoms such as myopia.Therefore,the lighting environment quality of multimedia classroom in primary and secondary schools will affect the visual health of students to a great extent.In addition,in this research in the process of middle and primary school classroom visit research found that the use of interactive electronic whiteboard in the classroom of primary and secondary schools frequency more than 85%,and the electronic whiteboard multimedia classroom has great difference with traditional classroom lighting environment,and the current domestic electronic whiteboard multimedia lighting design is lack of specific standards and specifications.Therefore,the research object of this paper is limited to the electronic white-board multimedia classroom,and the lighting environment is optimized from the perspective of students’ visual fatigue.First of all,by referring to the relevant norms and standards issued and implemented at home and abroad,this paper sorted out the norms and requirements of various lighting elements in classrooms.Then,through relevant literature research,this paper summarized and sorted out the lighting elements that would affect the visual fatigue of students in the classroom lighting environment,and selected the evaluation indexes suitable for visual fatigue through the analysis of the causes of visual fatigue.Secondly,on the basis of the above research,the questionnaire survey and field measurement of representative electronic whiteboard multimedia classrooms in primary and secondary schools were conducted to understand the subjective evaluation of students and teachers on the lighting environment,the current situation of the lighting environment of electronic whiteboard classrooms,and the current situation parameters of various lighting elements.Then through the analysis of the actual survey results,the lighting research elements that have the greatest influence on the visual fatigue degree of students in the lighting environment of the electronic whiteboard classroom are obtained.Thirdly,related experiments are designed according to theoretical research and survey measurement,including the experimental study on the influence of blackboard reflection coefficient on students’ visual fatigue,the experimental study on the influence of illuminance ratio and light source color temperature on students’ fatigue.By designing the simulation learning experiment of multimedia classroom of electronic whiteboard,the variation law of visual fatigue degree of students under different reflection coefficient,illuminance value and color temperature value of light source is explored,so as to establish the most appropriate reflection coefficient of blackboard,the best color temperature value of light source,illuminance value of blackboard and illuminance value of desktop in multimedia classroom of electronic whiteboard.Finally,according to the results of the preliminary survey and measurement and the conclusion of the later experimental research,optimization strategies are put forward from two aspects of interior design and lighting design to improve the lighting environment of the electronic whiteboard multimedia classroom.The optimization strategy of interior design is mainly put forward from two aspects: the spatial position relationship of blackboard,electronic whiteboard and podium,and the selection of interior materials.In lighting design,optimization suggestions are given quantitatively from the selection of illumination value and color temperature value.