Due to its high outputting luminance , large screen and the high quality of the projective image , the projection display for large screen has been used in many fields , such as official business work , conferences , etc . liquid crystal projection display , for example , one of the most important micro - display techniques , has shown the tendency for substituting the crt projection display in the conventional video display field 大屏幕投影显示以它的高亮度、大面积、高质量的显示图像，已逐步成为现代显示技术的主流，广泛应用于办公、会议、家庭影院等领域。以液晶投影显示技术为例，目前这项技术以及得到了广泛应用，而且正在逐步取代传统的crt显示技术。
