Garmin has developed a portable head-up display (HUD) for cars that projects turn-by-turn sat-nav directions on to a vehicle’s windscreen.
The app works with most Apple, Android and Windows smartphones to generate navigation information.
The gadget can project directional arrows, distances, current speed and speed limits on the windscreen.
Information is projected via the HUD’s attached reflector lens or on to a plastic film stuck to the window glass.
The navigation system can also provide voice prompts via a smartphone’s speaker or a car stereo that works with the Bluetooth short range radio technology. The app associated with the sat-nav system is available for iPhones, Android phones and Windows Phone 8 handsets.
The HUD automatically adjusts brightness levels to ensure that projected information is easy to read during the day and at night.
Garmin said its HUD would cost about $130 (£86) when it went on sale in late summer. Regional maps for the associated Garmin app will cost about $30 (£20) each.