关键词：交互技术；大型显示屏；触摸屏
摘 要：In this paper, we first focus on four different interaction techniques to share and manipulate content on large displays by using mobile phones. We compare speed and accuracy of these techniques by gathering and analyzing data from a user study with ten participants. From the data, we find touchpad is the most appropriate interaction technique, so we choose touchpad as our primary technique for developing applications. Our approach is to execute multiple copies of several existing applications in parallel and keep them synchronized, and they can be used by multiple users through touchpad interaction. Finally, we conduct a user study with ten participants to interact with our system. The evaluation result shows that it is convenient and efficient to use our system in a collaborative environment.