11 October 2012 Using micro-projectors to realize large screen head-up display
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Abstract
A head-up Display, HUD, is a safety feature for automobile drivers. Although there have been some HUD systems in commercial already, their images are too small to show assistance information. We demonstrated a HUD including micro-projectors, rear-projection screen and a Fresnel lens and realized a 14 inches image on the windshield. It is able to show speed, map-navigation and night vision information. We adopted digital light processing, DLP, as our image source because of its brighter image output required. To minimize the model volume, we applied a Fresnel lens to magnify the images from DLP projector. The size of the HUD model is 390 mm × 274 mm × 117 mm. It shows a virtual image 1.5 meters from windshields and the brightness is 378 nits which is clear enough to be seen by drivers even during daytime. Besides, it can also display information on a 7 inches instrument panel simultaneously.
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Ching-Pao Weng and Guo-Dung John Su "Using micro-projectors to realize large screen head-up display", Proc. SPIE 8486, Current Developments in Lens Design and Optical Engineering XIII, 84860I (11 October 2012); doi: 10.1117/12.929366; https://doi.org/10.1117/12.929366
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