The HUD technology is to project important navigation information onto a reflective film by using the principle of optical reflection. This reflective film is located at the front of the cab, at eye level with the driver, projecting text and images adjusted to infinity in focus. When the driver looks forward through the HUD reflective film, he can easily integrate the road scene from the outside with the important information displayed by the HUD. The most important thing about introducing HUD in cars is to ensure safe and stable driving for drivers, so that drivers can see relevant information without looking down, and avoid eye fatigue caused by adjusting eyes between observing distant roads and nearby instruments, thereby improving driving safety. 2. The main technical innovation points of the project This project develops a HUD front shield glass that matches the automotive HUD system. Through experimental research on different models, the wedge angle of the special PVB membrane is determined to form a quantifiable HUD imaging detection method. Through advanced pressing and forming technology, the glass profile and fit are improved, especially the spherical control of the HUD front shield display area, and the lamination process is optimized to finally solve the problems of ghosting, distortion, and offset in the HUD system. Integrate with the industrialization of HUD front windshield. Main innovations: 1. Using a projector to project ordinary front glass will cause ghosting due to the inconsistency between the outer glass and the inner glass in the direction of light radiation, and the image seen by the driver is blurred. However, the HUD front glass uses PVB with a mold angle, the outer glass and the inner glass are at a certain angle, and the light radiation direction is adjusted to be consistent, and the image becomes clearly visible; 2. The glass forming technology has been improved to achieve precise control of the spherical surface in the HUD area of the glass and improve the projection and imaging effect of the HUD glass. At the same time, it simulates the loading position of the HUD front shield glass and the projector, and develops a special HUD front shield glass for each model. Imaging testing device;3. The cutting and standing process of the special PVB membrane for HUD has been improved to solve the problem of wrinkles caused by storage and transportation of the special PVB membrane for HUD, and improve the yield; Through press forming technology, the glass profile and fit are improved, especially the spherical control of the front display area of the HUD. At the same time, the lamination process is optimized. 4. The ghost (ghosting) is not greater than plusmn; 1mm compared with the standard sample. The image rotation is less than plusmn; 1deg; compared with the standard sample, the horizontal and vertical values are within plusmn; 1deg;, and the imaging magnification: Compared with the standard sample, the deviation is le;5%. 3. Application and promotion of project results Judging from the market performance in recent years, HUD is no longer a symbol of high-end models. It is also appearing on more and more mid-to-low-end models. HUD has become an important selling point for vehicle companies. In addition, with the development of intelligent networking in the automotive industry, HUD has ushered in a good opportunity for development. This project has brought practical economic benefits to the company, which is expected to reach one billion yuan.