Head-Mounted Display Systems
نویسنده
چکیده
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 view-aided 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. This entry starts with a historical note and a perspective on contemporary pursuits in HMD designs. The main focus then shifts to details of the various components of HMDs, including the light source, various approaches to the optical design, and key aspects of the user interface. We then briefly review existing displays for both immersion and mixed reality. The final part discusses advanced pursuit in HMD designs.
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