预防疲劳驾驶专利，该专利介绍了一种防瞌睡后视镜。它不经具有一般汽车后视镜的功能，而且有防瞌睡功能，使用方便，防御功能强，准确率高。-Prevent fatigue driving patent describes the rear-view mirror of an anti-drowsy. It is not the general car rearview mirror function, and the anti-sleepy features, easy to use, the def