What is a car HUD head-up display?

[DeElijah]

Car HUD head-up display is a heads-up display, which was initially used as a flight aid instrument in aircraft and later applied to automobiles. Simply put, it allows drivers to reduce the frequency of looking down at the dashboard, thereby avoiding interruptions in attention and lowering the probability of accidents. The principle of car HUD is to use optical reflection to project important driving data onto the windshield. This involves two structures: data processing and image display. Currently, this configuration is more commonly found in high-end cars, while many mid-to-low-end vehicles still lack it. However, it can also be achieved through aftermarket modifications.