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所谓热光源显示设备,是指投影机、背投和时下正流行的交互式电子白板。在学校,多媒体设备进班级已经多年,其显示部件由大尺寸电视机到现在的投影机、交互式电子白板等,已经历经了十多年的时间,其成本之大,体现了国家对教育事业的重视。随着使用中出现的器件寿命和成本问题,使得电教部门对设备的投资管理更加慎重。我校在班级中普及使用多媒体技术进行教学是在20世纪90年代初期,第一代的显示部件是34英寸的电视机。由于学位紧张,每班的学生人数越来越多,放在前端的显示设备离学生的距离越来越近,对学生视力的影响也初步显现。2005
The so-called hot light display device, refers to the projector, rear projection and nowadays are popular interactive whiteboard. In schools, multi-media devices have been in classes for many years. Its display units have grown from large-size TVs to current projectors, interactive whiteboards, etc., and have cost more than a decade. This reflects the country’s commitment to education The importance of. With the emergence of the use of the device life and cost issues, making audio-visual equipment investment management department more cautious. Our school is popularizing and using the multimedia technology to teach in the class in the early 1990s, the first generation of display unit is a 34-inch TV. Due to degree shortage, the number of students in each class is more and more. The display devices on the front end are getting closer to the students and the impact on students’ eyesight is also preliminarily revealed. 2005