The purpose of this research is to understand the development and competitive status of auto-stereoscopic display via patents analysis. Moreover, the directions to the related 3D displays firms in Taiwan are provided. Auto-stereoscopic 3D displays are mostly composed of holographic display, volumetric display, and 2D-multiplexed display. Therefore, this research used these three technologies as objects to retrieve patents data from databases of United States Patent and Trademark Office (USPTO), Taiwan Intellectual Property Office (TIPO), and European Property Office (EPO) to implement the study. In terms of the patents analysis results and the consideration of technical aspects, this study discovered that for different purposes, holographic display and 2D-multiplexed are good directions to develop in future in Taiwan. Moreover, holographic is a good way to develop in high quality products, small or medium sizes at the moment. On the other hand, 2D-multiplexed is good for developing in general quality products.