There are many solutions to eliminate the ghosting of the WHUD front windshield, but the main solution at present (mass production, mature) is to use wedge-shaped PVB film laminated glass to adjust the reflected light.

    The PVB film between the two layers of glass inside and outside the ordinary front windshield is of uniform thickness. If this film is replaced with a wedge-shaped film, by adjusting the angle of the wedge-shaped film and the thickness of the glass, we can make the reflected light from the two sides keep getting closer to each other. , which eliminates ghosting effects.

    On the whole, the development of wedge-shaped PVB film laminated glass is difficult because the cycle is long, and the angle and shape of the windshield of different models are different, which needs to be re-developed. The cost of this type of laminated glass is several times that of ordinary glass. Cost restriction is one of the key problems in the application of W HUD to mid-end models at present, so many mid-range price models will use CHUD projected on an alternative screen. For most luxury models, the cost constraints are not so tight, and they are basically wedge-shaped PVB film laminated windshields.