Displays - Head - Mounted

Real-time three-dimensional (3D) interactive displays refer to display devices servo to the line of sight of a user, allowing not only free head motion, but also potentially and importantly full body mobility. Ideally, one could wish for such capability to exist without the need to wear any viewaided device. However, unless a display system could be created in space, anywhere and anytime, a simple solution is to wear the display. Such displays are today rather referred to as head-worn displays, but historically they have been referred to as head-mounted displays (HMDs). Because humans have not evolved to wear heavy devices, the challenge of interfacing such displays to the human head is tremendous given that the challenge is to design HMDs with lightweight optics as well as lightweight and ergonomic optomechanical headsets. Because some of the display specifications play against each other in achieving a lightweight and ergonomic display, it is critical to drive such display design with targeted applications and associated tasks that will help prioritizing the display requirements.