Sandbox‎ > ‎Archive‎ > ‎IPT 2008-09‎ > ‎Amy's Page‎ > ‎Amy's Updates‎ > ‎

Display Hardware: Heads Up Display

posted Apr 8, 2009, 3:39 PM by Unknown user   [ updated Jul 27, 2009, 5:48 AM by Eddie Woo ]
For list of other display hardware, see here.

A heads up display (HUD) is a display on a windshield that allows information to be displayed while not interfering with the intended view. Uses include flight simulators, aircrafts and gaming. In an aircraft, there are three parts: a computer, combiner and overhead projector unit (OPU), sometimes the combiner and OPU may be combined.

The combiner is made of transparent glass which reflects monochromatic light (usually the green wavelength) and is installed in the field of vision. It is able to be read without shifting focus (which may otherwise cause fatigue) and this is known as "focused at infinity".

The OPU usually projects information from a CRT mounted on the instrument pannel. Light is projected onto the combiner. However, now, many have started to utilise LCS and LED for brighter images and are also cheaper.

The video generation computer receives input from sensors on the aircraft and perform various computations.