Disclosed is a virtual display (300) which provides a wide field-of-view that is lightweight and may be as thin as ordinary eyeglasses. One version of the invention includes a display (302), such as an LCD, a microlens array (304), and an aperture array (306) disposed between the LCD and the microlens...http://www.google.com.hk/patents/US5883606?utm_source=gb-gplus-share專利 US5883606 - Flat virtual displays for virtual reality
