Revolutionizing EVs: A Comprehensive Analysis of Automotive HUD Technologies

With the ongoing development of electric vehicles and smart cockpits, HUDs have become critical technology to enhance driving safety and vehicle intelligence. It reduces distractions and improves the user experience by projecting important information such as speed, navigation, and assistance data directly into the operator's field of vision. This paper reviewed the development and current status of automotive HUD technology, focusing on analyzing and comparing 6 typical designs of HUD, including the early C-HUD, the currently popular W-HUD, and the 4 AR-HUD types categorized by single and dual optical path structures. The advantages and disadvantages of each type of HUD as well as the current challenges were pointed out, providing an analysis and comparison of typical designs of different types of HUDs from the perspectives of optical path design and imaging principles, and introduced the advantages, limitations, and current challenges of each type of HUD, as well as potential solutions to these challenges. Finally, potential solutions to these challenges were proposed, providing insights for the future development of smarter and safer HUD technologies.