HUD see a lot of jobs in other forums, that is not seen Swift jobs, itching ah, toss fresh and up, the last flowing dashboard job gave you engage in this stuff to say, now finally out good, good cost large force oh First literacy, what is HUD HUD? HUD HUD is - (Head Up Display) for short. HUD (Head Up Display), hereinafter referred to as HUD, is now widely used in the aircraft flight aids. Head is meant pilots do not need to bow to be able to see important information he needs. HUD first appeared in military aircraft, pilots need to bow to reduce the frequency of viewing instrument to avoid interruption and loss of attention to the state of consciousness (Situation Awareness) grasp. Because HUD's convenience and the ability to improve flight safety, civil aircraft have followed suit installation. Car HUD for high-speed vehicles and R & D, at high speeds, especially in high-speed driving at night, in order to avoid the driver down to watch or watch the audio meter display shows the front in case of emergency it is possible due to too late to take effective measures cause an accident. HUD is in a critical time reflects the extremely delicate care, the technology of the cars during the important information displayed by the instrument (such as speed) is projected onto the windshield, not only help to speed determination inexperienced novice to control their own speed and avoid many of the roads due to the speed limit speeding violation, and more importantly, it allows the driver instant readings under conditions not transfer large field of vision, always awake to keep the best observation state.