一、概述光笔图形显示器是计算机的一种外部设备。它能将计算机的输出数据用字符及图形的方式在荧光屏上显示出来,借助于光笔、键盘和软件的使用,又能随机地对荧光屏上显示的图形和字符作适当的修改,这种修改也改变了计算机中存贮器的显示数据,在一定程度上提供了实时方式和人机对话,并有 First, an overview Light pen graphics display is an external computer equipment. It can be computer output data with characters and graphics on the screen display, with the help of light pen, keyboard and software use, but also randomly on the screen display graphics and characters make the appropriate changes, this modification is also Changed the display data in the memory of the computer, to some extent provides a real-time mode and man-machine dialogue, and