page_title: Head-up display
section_title: Automobiles
hierarchical_section_title: Head-up display / Automobiles
caption_attribution_description: English: The green arrow on the windshield near the top of this picture is a Head Up Display on a 2013 Toyota Prius. It toggles between the GPS navigation instruction arrow and the speedometer. The arrow is animated to appear scrolling forward as the car approaches the turn. The image is projected without any kind of glass combiner.
context_page_description: A head-up display or heads-up display, also known as a HUD, is any transparent display that presents data without requiring users to look away from their usual viewpoints. 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. A HUD also has the advantage that the pilot's eyes do not need to refocus to view the outside after looking at the optically nearer instruments.
  Although they were initially developed for military aviation, HUDs are now used in commercial aircraft, automobiles, and other applications.
context_section_description: These displays are becoming increasingly available in production cars, and usually offer speedometer, tachometer, and navigation system displays. Night vision information is also displayed via HUD on certain automobiles.  In contrast to most HUDs found in aircraft, automotive head-up displays are not parallax-free.
  Add-on HUD systems also exist, projecting the display onto a glass combiner mounted above or below the windshield, or using the windshield itself as the combiner.
  In 2012 Pioneer Corporation introduced a HUD navigation system that replaces the driver side sun visor and visually overlays animations of conditions ahead; a form of augmented reality (AR). Developed by Pioneer Corporation, AR-HUD became the first aftermarket automotive Head-Up Display to use a direct-to-eye laser beam scanning method, also known as virtual retinal display (VRD). AR-HUD's core technology involves a miniature laser beam scanning display developed by MicroVision, Inc.
  Motorcycle helmet HUDs are also commercially available.
  Uniti electric city car will replace the dashboard with a large HUD to display information directly on the windscreen. The purpose is to increase safety as the driver will not have to move his eyes out from the road to look at the speed or the GPS screen.
  In recent years, it has been argued that conventional HUDs will be replaced by holographic AR technologies, such as the ones developed by WayRay that use holographic optical elements (HOE). The HOE allows for a wider field of view while reducing the size of the device and making the solution customizable for any car model. Mercedes Benz introduced an Augmented Reality based Head Up Display while Faurecia invested in an eye gaze and finger controlled head up display.
caption: The green arrow on the windshield near the top of this picture is a Head-Up Display on a 2013 Toyota Prius. It toggles between the GPS navigation instruction arrow and the speedometer. The arrow is animated to appear scrolling forward as the car approaches the turn. The image is projected without any kind of glass combiner.
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