Abstract: This paper designs a virtual touch screen which is composed of one-dimensional image acquisition equipments，screen and data processing settings.It avoids finger recognition problem due to body shade in large size screen.Points in one dimensional coordinate are converted to point in two-dimensional virtual touch screen by data processing settings according to corresponding relation between one-dimension coordinate in one-dimensional image and two-dimension coordinate in virtual touch screen.One-dimensional image acquisition equipment adopts one-dimensional linearity sensor，lens，signal conversion and interface circuit.It can also adopt camera obtained from market easily，but only use one row or one list data in two-dimensional image.

摘要： 为避免大屏幕触摸屏中人体遮挡无法识别手指的问题设计了一种虚拟触摸屏系统，由至少两个一维图像采集装置、显示屏和数据处理装置构成。一维图像采集装置可以是一维线性传感器，配合镜头、信号转换和接口电路实现；也可以是市场上易于购得的二维图像采集装置摄像头，使用其一维图像数据。由一维图像采集装置采集手指在虚拟触摸屏上的一维图像数据，根据多个一维坐标点位置与二维虚拟触摸屏上点位置的一一对应关系，由数据处理装置将其转换为手指触摸屏幕上的二维直角坐标，从而完成对应的操作，实现人机交互。