HUD (Head-up display) uses technology developed for military fighter jets to
project important driving information and navigation commands directly onto the
windscreen. The origin of the name stems from a pilot being able to view
information with the head positioned "up" and looking forward, instead of angled
down looking at lower instruments.
'HUD' uses a series of mirrors and a display screen to showcase speed and
tachometer readings, vehicle warnings, turn signal activation, external
temperature, and vehicle and radio controls. drivers can adjust the brightness
and location of the image, or turn it off.
The HUD system has to work with a “HUD” windscreen that has special PVB film
with special processing that act as a “Screen” to display the image.