HUD Inverview_平视显示技术介绍.ppt

Welcome to visual world Prepare by Carl Lin With HUD Technology Original For Now Future Original Definition Structure History Definition – Why we call it HUD 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. ---- from wiki 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. History – comes from and development Structure – Key elements of HUD A typical HUD contains three primary components: projector unit combiner video generation computer Structure – Projector The projection unit in a typical HUD is an optical collimator setup: a convex lens or concave mirror with a CRT, LED, or LCD at its focus. This setup produces an image where the light is collimated, i.e. the focal point is perceived to be at infinity. Refractive Diffraction Imaging Distance Control Structure – Combiner The combiner is typically an angled flat piece of glass (a beam splitter) located directly in front of the viewer, that redirects the projected image from projector in such a way as to see the field of view and the projected infinity image at the same time. Combiners may have special coatings that reflect the monochromatic light projected onto it from the projector unit while allowing all other wavelengths of light to pass through. In some optical layouts combiners may also have a curved surface to refocus the image from the projector. Imaging Mixed Reflective Plate Reflective Film Full Windshield Applications Technical For Now Applications – Modern HUD Extensions Automotive – HUD in vehicle These displays are becoming increasingly available in production cars, and usually offer speedometer, tachometer, and navigation system displays. Night vision information or Safety guides is also displayed via HUD on certain automobiles Techni