Head Up Displays are transparent displays presenting data without requiring users to look away from their usual viewpoints. A typical HUD contains three primary components:

·         a projector unit

·          a combiner (a viewing glass)

·         a video generation computer.

Heads up displays were mainly invented for mission critical applications like flight controllers and weapons system dashboards. Critical information is projected on transparent screens mounted in front of the pilot. This enables pilots to look forward outside rather than looking down inside the cockpit. HUDs help increase situational awareness by reducing the shift of focus for pilots. Although they were initially developed for military aviation, HUDs are now available for civil use in commercial aircraft, automobiles (new designs), and other applications. It is a revolution for automotive industry as those systems can project information on the windshield, tell you where to turn, notify you of lane markings, identify how close the car in front of you is and even give you restaurant information all right in front of your eyes – and while you’re actually able to see those objects or places with your head up! And it’s not only available for high-end vehicles. In 2012 Pioneer released an aftermarket head-up display unit that mounts to the top of a car’s cabin and can project information on the windshield. The system connects to a smartphone app through Bluetooth wireless technology and displays navigation instructions, points of interest and even road hazards.