免屏交互式电子投影的教学作用及技术解析

Technique Analyses of Screen-free Interactive Projectors and Their Application in Teaching

当今,液晶投影机在大学、中小学,乃至一些培训场所和会议场所广泛使用,但往往尚处传统的使用方式。结合一些新技术,技巧地使用液晶投影机,可以使投影屏幕具有交互性,投影质量亦提升,以使教学效果(包括协作会议效果)更生动、更科学。本文分析了几种主要的电子白板的工作原理并对其性能加以比较,重点阐述了较为先进的免屏光感控制数字电子白板对投影教学的支持作用。

Nowadays,although liquid crystal projectors are widely equipped at universities and high and primary schools,they are often used in traditional ways.Combined with new techniques and used in smart ways,the projectors screen can be interactive and the quality of projection can also be improved.Thus,the users can make their presentation in a class or meeting more vivid and reasonable.The article analyzes the operational principles of several major electronic whiteboards and compares their performances,highlighting the supportive effects on teaching caused by the advanced photo-control digital electronic whiteboards.